diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/AbsFileer.java b/Aria/src/main/java/com/arialyy/aria/core/common/AbsFileer.java
index d4cdf491..844c2934 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/common/AbsFileer.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/AbsFileer.java
@@ -16,6 +16,7 @@
 package com.arialyy.aria.core.common;
 
 import android.content.Context;
+import android.os.Looper;
 import android.util.SparseArray;
 import com.arialyy.aria.core.AriaManager;
 import com.arialyy.aria.core.download.BaseDListener;
diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/AbsThreadTask.java b/Aria/src/main/java/com/arialyy/aria/core/common/AbsThreadTask.java
index 87127e4b..ea68c1ab 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/common/AbsThreadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/AbsThreadTask.java
@@ -58,22 +58,19 @@ public abstract class AbsThreadTask<ENTITY extends AbsNormalEntity, TASK_WRAPPER
    */
   protected long mChildCurrentLocation = 0;
   protected IEventListener mListener;
-  protected StateConstance STATE;
-  protected SubThreadConfig<TASK_WRAPPER> mConfig;
-  protected ENTITY mEntity;
-  protected TASK_WRAPPER mTaskWrapper;
+  private StateConstance sState;
+  private SubThreadConfig<TASK_WRAPPER> sConfig;
+  private ENTITY mEntity;
+  private TASK_WRAPPER mTaskWrapper;
   private int mFailTimes = 0;
   private long mLastSaveTime;
   private ExecutorService mConfigThreadPool;
-  protected boolean isNotNetRetry;  //断网情况是否重试
+  private boolean isNotNetRetry;  //断网情况是否重试
   private boolean taskBreak = false;  //任务跳出
-  protected int mThreadNum;
-  /**
-   * 速度限制工具
-   */
-  protected BandwidthLimiter mSpeedBandUtil;
+  private int mThreadNum;
+  protected BandwidthLimiter mSpeedBandUtil; //速度限制工具
   protected AriaManager mAridManager;
-  protected boolean isInterrupted = false;
+  private boolean isInterrupted = false;
 
   private Thread mConfigThread = new Thread(new Runnable() {
     @Override public void run() {
@@ -85,14 +82,14 @@ public abstract class AbsThreadTask<ENTITY extends AbsNormalEntity, TASK_WRAPPER
 
   protected AbsThreadTask(StateConstance constance, IEventListener listener,
       SubThreadConfig<TASK_WRAPPER> config) {
-    STATE = constance;
+    sState = constance;
+    sConfig = config;
     mListener = listener;
-    mConfig = config;
-    mTaskWrapper = mConfig.TASK_WRAPPER;
+    mTaskWrapper = getConfig().TASK_WRAPPER;
     mEntity = mTaskWrapper.getEntity();
     mLastSaveTime = System.currentTimeMillis();
     mConfigThreadPool = Executors.newCachedThreadPool();
-    mThreadNum = STATE.TASK_RECORD.threadRecords.size();
+    mThreadNum = getState().TASK_RECORD.threadRecords.size();
     mAridManager = AriaManager.getInstance(AriaManager.APP);
     if (getMaxSpeed() > 0) {
       mSpeedBandUtil = new BandwidthLimiter(getMaxSpeed(), mThreadNum);
@@ -122,21 +119,42 @@ protected boolean isLive() {
    * 当前线程是否完成，对于不支持断点的任务，一律未完成 {@code true} 完成；{@code false} 未完成
    */
   boolean isThreadComplete() {
-    return mConfig.THREAD_RECORD.isComplete;
+    return getConfig().THREAD_RECORD.isComplete;
+  }
+
+  /**
+   * 获取状态信息
+   */
+  protected StateConstance getState() {
+    return sState;
+  }
+
+  /**
+   * 获取实体
+   */
+  protected ENTITY getEntity() {
+    return mEntity;
+  }
+
+  /**
+   * 获取任务驱动对象
+   */
+  protected TASK_WRAPPER getTaskWrapper() {
+    return mTaskWrapper;
   }
 
   /**
    * 获取任务记录
    */
   private TaskRecord getTaskRecord() {
-    return STATE.TASK_RECORD;
+    return getState().TASK_RECORD;
   }
 
   /**
    * 获取线程记录
    */
   protected ThreadRecord getThreadRecord() {
-    return mConfig.THREAD_RECORD;
+    return getConfig().THREAD_RECORD;
   }
 
   /**
@@ -170,19 +188,19 @@ public void setMaxSpeed(int speed) {
   void breakTask() {
     synchronized (AriaManager.LOCK) {
       taskBreak = true;
-      if (mConfig.SUPPORT_BP) {
+      if (getConfig().SUPPORT_BP) {
         final long currentTemp = mChildCurrentLocation;
-        STATE.STOP_NUM++;
-        ALog.d(TAG, String.format("任务【%s】thread__%s__中断【停止位置：%s】", mConfig.TEMP_FILE.getName(),
-            mConfig.THREAD_ID, currentTemp));
+        getState().STOP_NUM++;
+        ALog.d(TAG, String.format("任务【%s】thread__%s__中断【停止位置：%s】", getConfig().TEMP_FILE.getName(),
+            getConfig().THREAD_ID, currentTemp));
         writeConfig(false, currentTemp);
-        if (STATE.isStop()) {
-          ALog.i(TAG, String.format("任务【%s】已中断", mConfig.TEMP_FILE.getName()));
-          STATE.isRunning = false;
+        if (getState().isStop()) {
+          ALog.i(TAG, String.format("任务【%s】已中断", getConfig().TEMP_FILE.getName()));
+          getState().isRunning = false;
         }
       } else {
-        ALog.i(TAG, String.format("任务【%s】已中断", mConfig.TEMP_FILE.getName()));
-        STATE.isRunning = false;
+        ALog.i(TAG, String.format("任务【%s】已中断", getConfig().TEMP_FILE.getName()));
+        getState().isRunning = false;
       }
     }
   }
@@ -193,7 +211,7 @@ void breakTask() {
    * @return {@code true}正在运行
    */
   public boolean isRunning() {
-    return STATE.isRunning;
+    return getState().isRunning;
   }
 
   public boolean isInterrupted() {
@@ -203,8 +221,8 @@ public boolean isInterrupted() {
   /**
    * 获取线程配置信息
    */
-  public SubThreadConfig getConfig() {
-    return mConfig;
+  protected SubThreadConfig<TASK_WRAPPER> getConfig() {
+    return sConfig;
   }
 
   @Override protected void finalize() throws Throwable {
@@ -220,7 +238,7 @@ public SubThreadConfig getConfig() {
    * @return {@code true} 中断，{@code false} 不是中断
    */
   protected boolean isBreak() {
-    return STATE.isCancel || STATE.isStop || taskBreak;
+    return getState().isCancel || getState().isStop || taskBreak;
   }
 
   /**
@@ -230,10 +248,10 @@ protected boolean isBreak() {
    */
   protected boolean mergeFile() {
     List<String> partPath = new ArrayList<>();
-    for (int i = 0, len = STATE.TASK_RECORD.threadNum; i < len; i++) {
-      partPath.add(String.format(AbsFileer.SUB_PATH, STATE.TASK_RECORD.filePath, i));
+    for (int i = 0, len = getState().TASK_RECORD.threadNum; i < len; i++) {
+      partPath.add(String.format(AbsFileer.SUB_PATH, getState().TASK_RECORD.filePath, i));
     }
-    boolean isSuccess = FileUtil.mergeFile(STATE.TASK_RECORD.filePath, partPath);
+    boolean isSuccess = FileUtil.mergeFile(getState().TASK_RECORD.filePath, partPath);
     if (isSuccess) {
       for (String pp : partPath) {
         File f = new File(pp);
@@ -241,10 +259,10 @@ protected boolean mergeFile() {
           f.delete();
         }
       }
-      File targetFile = new File(STATE.TASK_RECORD.filePath);
-      if (targetFile.exists() && targetFile.length() > mEntity.getFileSize()) {
+      File targetFile = new File(getState().TASK_RECORD.filePath);
+      if (targetFile.exists() && targetFile.length() > getEntity().getFileSize()) {
         ALog.e(TAG, String.format("任务【%s】分块文件合并失败，下载长度超出文件真实长度，downloadLen: %s，fileSize: %s",
-            mConfig.TEMP_FILE.getName(), targetFile.length(), mEntity.getFileSize()));
+            getConfig().TEMP_FILE.getName(), targetFile.length(), getEntity().getFileSize()));
         return false;
       }
       return true;
@@ -282,30 +300,31 @@ protected boolean checkBlock() {
    */
   public void stop() {
     synchronized (AriaManager.LOCK) {
-      if (mConfig.SUPPORT_BP) {
+      if (getConfig().SUPPORT_BP) {
         final long stopLocation;
         if (getTaskRecord().isBlock) {
           File blockFile = getBockFile();
           ThreadRecord tr = getThreadRecord();
-          long block = mEntity.getFileSize() / getTaskRecord().threadRecords.size();
+          long block = getEntity().getFileSize() / getTaskRecord().threadRecords.size();
           stopLocation =
               blockFile.exists() ? (tr.threadId * block + blockFile.length()) : tr.threadId * block;
         } else {
           stopLocation = mChildCurrentLocation;
         }
-        STATE.STOP_NUM++;
-        ALog.d(TAG, String.format("任务【%s】thread__%s__停止【当前线程停止位置：%s】", mConfig.TEMP_FILE.getName(),
-            mConfig.THREAD_ID, stopLocation));
+        getState().STOP_NUM++;
+        ALog.d(TAG,
+            String.format("任务【%s】thread__%s__停止【当前线程停止位置：%s】", getConfig().TEMP_FILE.getName(),
+                getConfig().THREAD_ID, stopLocation));
         writeConfig(false, stopLocation);
-        if (STATE.isStop()) {
-          ALog.i(TAG, String.format("任务【%s】已停止", mConfig.TEMP_FILE.getName()));
-          STATE.isRunning = false;
-          mListener.onStop(STATE.CURRENT_LOCATION);
+        if (getState().isStop()) {
+          ALog.i(TAG, String.format("任务【%s】已停止", getConfig().TEMP_FILE.getName()));
+          getState().isRunning = false;
+          mListener.onStop(getState().CURRENT_LOCATION);
         }
       } else {
-        ALog.i(TAG, String.format("任务【%s】已停止", mConfig.TEMP_FILE.getName()));
-        STATE.isRunning = false;
-        mListener.onStop(STATE.CURRENT_LOCATION);
+        ALog.i(TAG, String.format("任务【%s】已停止", getConfig().TEMP_FILE.getName()));
+        getState().isRunning = false;
+        mListener.onStop(getState().CURRENT_LOCATION);
       }
     }
   }
@@ -315,19 +334,20 @@ public void stop() {
    */
   protected void progress(long len) {
     synchronized (AriaManager.LOCK) {
-      if (STATE.CURRENT_LOCATION > mEntity.getFileSize() && !mTaskWrapper.asHttp().isChunked()) {
+      if (getState().CURRENT_LOCATION > getEntity().getFileSize() && !getTaskWrapper().asHttp()
+          .isChunked()) {
         String errorMsg =
             String.format("下载失败，下载长度超出文件真实长度；currentLocation=%s, fileSize=%s",
-                STATE.CURRENT_LOCATION,
-                mEntity.getFileSize());
+                getState().CURRENT_LOCATION,
+                getEntity().getFileSize());
         taskBreak = true;
         fail(mChildCurrentLocation, new FileException(TAG, errorMsg), false);
         return;
       }
       mChildCurrentLocation += len;
-      STATE.CURRENT_LOCATION += len;
+      getState().CURRENT_LOCATION += len;
       if (System.currentTimeMillis() - mLastSaveTime > 5000
-          && mChildCurrentLocation < mConfig.END_LOCATION) {
+          && mChildCurrentLocation < getConfig().END_LOCATION) {
         mLastSaveTime = System.currentTimeMillis();
         if (!mConfigThreadPool.isShutdown()) {
           mConfigThreadPool.execute(mConfigThread);
@@ -341,21 +361,22 @@ protected void progress(long len) {
    */
   public void cancel() {
     synchronized (AriaManager.LOCK) {
-      if (mConfig.SUPPORT_BP) {
-        STATE.CANCEL_NUM++;
+      if (getConfig().SUPPORT_BP) {
+        getState().CANCEL_NUM++;
         ALog.d(TAG,
-            String.format("任务【%s】thread__%s__取消", mConfig.TEMP_FILE.getName(), mConfig.THREAD_ID));
-        if (STATE.isCancel()) {
-          if (mConfig.TEMP_FILE.exists() && !(mEntity instanceof UploadEntity)) {
-            mConfig.TEMP_FILE.delete();
+            String.format("任务【%s】thread__%s__取消", getConfig().TEMP_FILE.getName(),
+                getConfig().THREAD_ID));
+        if (getState().isCancel()) {
+          if (getConfig().TEMP_FILE.exists() && !(getEntity() instanceof UploadEntity)) {
+            getConfig().TEMP_FILE.delete();
           }
-          ALog.d(TAG, String.format("任务【%s】已取消", mConfig.TEMP_FILE.getName()));
-          STATE.isRunning = false;
+          ALog.d(TAG, String.format("任务【%s】已取消", getConfig().TEMP_FILE.getName()));
+          getState().isRunning = false;
           mListener.onCancel();
         }
       } else {
-        ALog.d(TAG, String.format("任务【%s】已取消", mConfig.TEMP_FILE.getName()));
-        STATE.isRunning = false;
+        ALog.d(TAG, String.format("任务【%s】已取消", getConfig().TEMP_FILE.getName()));
+        getState().isRunning = false;
         mListener.onCancel();
       }
     }
@@ -377,18 +398,16 @@ protected void fail(final long subCurrentLocation, BaseException ex) {
    * @param subCurrentLocation 当前子线程进度
    */
   protected void fail(final long subCurrentLocation, BaseException ex, boolean needRetry) {
-    synchronized (AriaManager.LOCK) {
-      if (ex != null) {
-        ALog.e(TAG, ALog.getExceptionString(ex));
-      }
-      if (mConfig.SUPPORT_BP) {
-        writeConfig(false, subCurrentLocation);
-        retryThis(needRetry && STATE.START_THREAD_NUM != 1);
-      } else {
-        ALog.e(TAG, String.format("任务【%s】执行失败", mConfig.TEMP_FILE.getName()));
-        ErrorHelp.saveError(TAG, "", ALog.getExceptionString(ex));
-        handleFailState(!isBreak());
-      }
+    if (ex != null) {
+      ALog.e(TAG, ALog.getExceptionString(ex));
+    }
+    if (getConfig().SUPPORT_BP) {
+      writeConfig(false, subCurrentLocation);
+      retryThis(needRetry && getState().START_THREAD_NUM != 1);
+    } else {
+      ALog.e(TAG, String.format("任务【%s】执行失败", getConfig().TEMP_FILE.getName()));
+      ErrorHelp.saveError(TAG, "", ALog.getExceptionString(ex));
+      handleFailState(!isBreak());
     }
   }
 
@@ -398,22 +417,20 @@ protected void fail(final long subCurrentLocation, BaseException ex, boolean nee
    * @param needRetry 是否可以重试
    */
   private void retryThis(boolean needRetry) {
-    synchronized (AriaManager.LOCK) {
-      if (!NetUtils.isConnected(AriaManager.APP) && !isNotNetRetry) {
-        ALog.w(TAG, String.format("任务【%s】thread__%s__重试失败，网络未连接", mConfig.TEMP_FILE.getName(),
-            mConfig.THREAD_ID));
-      }
-      if (mFailTimes < RETRY_NUM && needRetry && (NetUtils.isConnected(AriaManager.APP)
-          || isNotNetRetry) && !isBreak()) {
-        ALog.w(TAG,
-            String.format("任务【%s】thread__%s__正在重试", mConfig.TEMP_FILE.getName(),
-                mConfig.THREAD_ID));
-        mFailTimes++;
-        handleRetryRecord();
-        ThreadTaskManager.getInstance().retryThread(AbsThreadTask.this);
-      } else {
-        handleFailState(!isBreak());
-      }
+    if (!NetUtils.isConnected(AriaManager.APP) && !isNotNetRetry) {
+      ALog.w(TAG, String.format("任务【%s】thread__%s__重试失败，网络未连接", getConfig().TEMP_FILE.getName(),
+          getConfig().THREAD_ID));
+    }
+    if (mFailTimes < RETRY_NUM && needRetry && (NetUtils.isConnected(AriaManager.APP)
+        || isNotNetRetry) && !isBreak()) {
+      ALog.w(TAG,
+          String.format("任务【%s】thread__%s__正在重试", getConfig().TEMP_FILE.getName(),
+              getConfig().THREAD_ID));
+      mFailTimes++;
+      handleRetryRecord();
+      ThreadTaskManager.getInstance().retryThread(AbsThreadTask.this);
+    } else {
+      handleFailState(!isBreak());
     }
   }
 
@@ -423,7 +440,7 @@ private void retryThis(boolean needRetry) {
   private void handleRetryRecord() {
     if (getTaskRecord().isBlock) {
       ThreadRecord tr = getThreadRecord();
-      long block = mEntity.getFileSize() / getTaskRecord().threadRecords.size();
+      long block = getEntity().getFileSize() / getTaskRecord().threadRecords.size();
 
       File blockFile = getBockFile();
       if (blockFile.length() > tr.blockLen) {
@@ -431,22 +448,22 @@ private void handleRetryRecord() {
         blockFile.delete();
         tr.startLocation = block * tr.threadId;
         tr.isComplete = false;
-        mConfig.START_LOCATION = tr.startLocation;
+        getConfig().START_LOCATION = tr.startLocation;
       } else if (blockFile.length() < tr.blockLen) {
         tr.startLocation = block * tr.threadId + blockFile.length();
         tr.isComplete = false;
-        mConfig.START_LOCATION = tr.startLocation;
-        STATE.CURRENT_LOCATION = getBlockRealTotalSize();
+        getConfig().START_LOCATION = tr.startLocation;
+        getState().CURRENT_LOCATION = getBlockRealTotalSize();
         ALog.i(TAG, String.format("修正分块【%s】，开始位置：%s，当前进度：%s", blockFile.getPath(), tr.startLocation,
-            STATE.CURRENT_LOCATION));
+            getState().CURRENT_LOCATION));
       } else {
-        STATE.COMPLETE_THREAD_NUM++;
+        getState().COMPLETE_THREAD_NUM++;
         tr.isComplete = true;
       }
       tr.update();
     } else {
-      mConfig.START_LOCATION = mChildCurrentLocation == 0 ? mConfig.START_LOCATION
-          : mConfig.THREAD_RECORD.startLocation;
+      getConfig().START_LOCATION = mChildCurrentLocation == 0 ? getConfig().START_LOCATION
+          : getConfig().THREAD_RECORD.startLocation;
     }
   }
 
@@ -456,7 +473,7 @@ private void handleRetryRecord() {
    * @return 分块文件
    */
   private File getBockFile() {
-    return new File(String.format(AbsFileer.SUB_PATH, STATE.TASK_RECORD.filePath,
+    return new File(String.format(AbsFileer.SUB_PATH, getState().TASK_RECORD.filePath,
         getThreadRecord().threadId));
   }
 
@@ -482,15 +499,13 @@ private long getBlockRealTotalSize() {
    * @param taskNeedReTry 任务是否需要重试{@code true} 需要
    */
   private void handleFailState(boolean taskNeedReTry) {
-    synchronized (AriaManager.LOCK) {
-      STATE.FAIL_NUM++;
-      if (STATE.isFail()) {
-        STATE.isRunning = false;
-        // 手动停止不进行fail回调
-        if (!STATE.isStop) {
-          String errorMsg = String.format("任务【%s】执行失败", mConfig.TEMP_FILE.getName());
-          mListener.onFail(taskNeedReTry, new TaskException(TAG, errorMsg));
-        }
+    getState().FAIL_NUM++;
+    if (getState().isFail()) {
+      getState().isRunning = false;
+      // 手动停止不进行fail回调
+      if (!getState().isStop) {
+        String errorMsg = String.format("任务【%s】执行失败", getConfig().TEMP_FILE.getName());
+        mListener.onFail(taskNeedReTry, new TaskException(TAG, errorMsg));
       }
     }
   }
@@ -502,21 +517,19 @@ private void handleFailState(boolean taskNeedReTry) {
    * @param record 当前下载进度
    */
   protected void writeConfig(boolean isComplete, final long record) {
-    synchronized (AriaManager.LOCK) {
-      ThreadRecord tr = getThreadRecord();
-      if (tr != null) {
-        tr.isComplete = isComplete;
-        if (getTaskRecord().isBlock) {
+    ThreadRecord tr = getThreadRecord();
+    if (tr != null) {
+      tr.isComplete = isComplete;
+      if (getTaskRecord().isBlock) {
+        tr.startLocation = record;
+      } else if (getTaskRecord().isOpenDynamicFile) {
+        tr.startLocation = getConfig().TEMP_FILE.length();
+      } else {
+        if (0 < record && record < getConfig().END_LOCATION) {
           tr.startLocation = record;
-        } else if (getTaskRecord().isOpenDynamicFile) {
-          tr.startLocation = mConfig.TEMP_FILE.length();
-        } else {
-          if (0 < record && record < mConfig.END_LOCATION) {
-            tr.startLocation = record;
-          }
         }
-        tr.update();
       }
+      tr.update();
     }
   }
 
diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/OnFileInfoCallback.java b/Aria/src/main/java/com/arialyy/aria/core/common/OnFileInfoCallback.java
index 82ed853f..7b8b34c0 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/common/OnFileInfoCallback.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/OnFileInfoCallback.java
@@ -15,6 +15,7 @@
  */
 package com.arialyy.aria.core.common;
 
+import com.arialyy.aria.core.inf.AbsEntity;
 import com.arialyy.aria.exception.BaseException;
 
 public interface OnFileInfoCallback {
@@ -30,5 +31,5 @@ public interface OnFileInfoCallback {
    *
    * @param e 错误信息
    */
-  void onFail(String url, BaseException e, boolean needRetry);
+  void onFail(AbsEntity entity, BaseException e, boolean needRetry);
 }
\ No newline at end of file
diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/ftp/AbsFtpInfoThread.java b/Aria/src/main/java/com/arialyy/aria/core/common/ftp/AbsFtpInfoThread.java
index bc9ff75f..4b1533e7 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/common/ftp/AbsFtpInfoThread.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/ftp/AbsFtpInfoThread.java
@@ -374,7 +374,7 @@ protected void handleFile(String remotePath, FTPFile ftpFile) {
 
   private void failDownload(BaseException e, boolean needRetry) {
     if (mCallback != null) {
-      mCallback.onFail(mEntity.getKey(), e, needRetry);
+      mCallback.onFail(mEntity, e, needRetry);
     }
   }
 
diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/ftp/AbsFtpThreadTask.java b/Aria/src/main/java/com/arialyy/aria/core/common/ftp/AbsFtpThreadTask.java
index 9e949f95..d7b6be3f 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/common/ftp/AbsFtpThreadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/ftp/AbsFtpThreadTask.java
@@ -57,7 +57,7 @@ protected AbsFtpThreadTask(StateConstance constance, IEventListener listener,
    */
   protected FTPClient createClient() {
     FTPClient client = null;
-    final FtpUrlEntity urlEntity = mTaskWrapper.asFtp().getUrlEntity();
+    final FtpUrlEntity urlEntity = getTaskWrapper().asFtp().getUrlEntity();
     if (urlEntity.validAddr == null) {
       try {
         InetAddress[] ips = InetAddress.getAllByName(urlEntity.hostName);
@@ -106,8 +106,8 @@ protected FTPClient createClient() {
       // 开启服务器对UTF-8的支持，如果服务器支持就用UTF-8编码
       charSet = "UTF-8";
       if (reply != FTPReply.COMMAND_IS_SUPERFLUOUS) {
-        if (!TextUtils.isEmpty(mTaskWrapper.asFtp().getCharSet())) {
-          charSet = mTaskWrapper.asFtp().getCharSet();
+        if (!TextUtils.isEmpty(getTaskWrapper().asFtp().getCharSet())) {
+          charSet = getTaskWrapper().asFtp().getCharSet();
         }
       }
       client.setControlEncoding(charSet);
@@ -116,7 +116,7 @@ protected FTPClient createClient() {
       client.enterLocalPassiveMode();
       client.setFileType(FTP.BINARY_FILE_TYPE);
       client.setControlKeepAliveTimeout(5000);
-      if (mTaskWrapper.asFtp().getUrlEntity().isFtps) {
+      if (getTaskWrapper().asFtp().getUrlEntity().isFtps) {
         ((FTPSClient) client).execPROT("P");
       }
     } catch (java.io.IOException e) {
@@ -150,7 +150,7 @@ private FTPClient newInstanceClient(FtpUrlEntity urlEntity) {
   private FTPClient connect(FTPClient client, InetAddress[] ips, int index, int port) {
     try {
       client.connect(ips[index], port);
-      mTaskWrapper.asFtp().getUrlEntity().validAddr = ips[index];
+      getTaskWrapper().asFtp().getUrlEntity().validAddr = ips[index];
       return client;
     } catch (java.io.IOException e) {
       try {
diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpDelegate.java b/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpDelegate.java
index 40ac1f48..20ba2357 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpDelegate.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpDelegate.java
@@ -1,104 +1,103 @@
-/*
- * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.arialyy.aria.core.common.http;
-
-import android.text.TextUtils;
-import com.arialyy.aria.core.download.DGTaskWrapper;
-import com.arialyy.aria.core.download.DTaskWrapper;
-import com.arialyy.aria.core.download.DownloadGroupTarget;
-import com.arialyy.aria.core.inf.AbsTarget;
-import com.arialyy.aria.core.inf.ITargetHandler;
-import com.arialyy.aria.util.ALog;
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * HTTP参数委托
- * @param <TARGET>
- */
-class HttpDelegate<TARGET extends AbsTarget> implements ITargetHandler {
-  private static final String TAG = "PostDelegate";
-  TARGET mTarget;
-
-  HttpDelegate(TARGET target) {
-    mTarget = target;
-  }
-
-  public TARGET setParams(Map<String, String> params) {
-    mTarget.getTaskWrapper().asHttp().setParams(params);
-    if (mTarget instanceof DownloadGroupTarget) {
-      for (DTaskWrapper subTask : ((DGTaskWrapper) mTarget.getTaskWrapper()).getSubTaskWrapper()) {
-        subTask.asHttp().setParams(params);
-      }
-    }
-    return mTarget;
-  }
-
-  public TARGET setParam(String key, String value) {
-    if (TextUtils.isEmpty(key) || TextUtils.isEmpty(value)) {
-      ALog.d(TAG, "key 或value 为空");
-      return mTarget;
-    }
-    Map<String, String> params = mTarget.getTaskWrapper().asHttp().getParams();
-    if (params == null) {
-      params = new HashMap<>();
-      mTarget.getTaskWrapper().asHttp().setParams(params);
-    }
-    params.put(key, value);
-    if (mTarget instanceof DownloadGroupTarget) {
-      for (DTaskWrapper subTask : ((DGTaskWrapper) mTarget.getTaskWrapper()).getSubTaskWrapper()) {
-        subTask.asHttp().setParams(params);
-      }
-    }
-    return mTarget;
-  }
-
-  @Override public void add() {
-    mTarget.add();
-  }
-
-  @Override public void start() {
-    mTarget.start();
-  }
-
-  @Override public void stop() {
-    mTarget.stop();
-  }
-
-  @Override public void resume() {
-    mTarget.resume();
-  }
-
-  @Override public void cancel() {
-    mTarget.cancel();
-  }
-
-  @Override public void save() {
-    mTarget.save();
-  }
-
-  @Override public void cancel(boolean removeFile) {
-    mTarget.cancel(removeFile);
-  }
-
-  @Override public void reTry() {
-    mTarget.reTry();
-  }
-
-  @Override public void reStart() {
-    mTarget.reStart();
-  }
-}
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.core.common.http;
+
+import android.text.TextUtils;
+import com.arialyy.aria.core.download.DGTaskWrapper;
+import com.arialyy.aria.core.download.DTaskWrapper;
+import com.arialyy.aria.core.download.DownloadGroupTarget;
+import com.arialyy.aria.core.inf.AbsTarget;
+import com.arialyy.aria.core.inf.ITargetHandler;
+import com.arialyy.aria.util.ALog;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * HTTP参数委托
+ */
+class HttpDelegate<TARGET extends AbsTarget> implements ITargetHandler {
+  private static final String TAG = "PostDelegate";
+  TARGET mTarget;
+
+  HttpDelegate(TARGET target) {
+    mTarget = target;
+  }
+
+  public TARGET setParams(Map<String, String> params) {
+    mTarget.getTaskWrapper().asHttp().setParams(params);
+    if (mTarget instanceof DownloadGroupTarget) {
+      for (DTaskWrapper subTask : ((DGTaskWrapper) mTarget.getTaskWrapper()).getSubTaskWrapper()) {
+        subTask.asHttp().setParams(params);
+      }
+    }
+    return mTarget;
+  }
+
+  public TARGET setParam(String key, String value) {
+    if (TextUtils.isEmpty(key) || TextUtils.isEmpty(value)) {
+      ALog.d(TAG, "key 或value 为空");
+      return mTarget;
+    }
+    Map<String, String> params = mTarget.getTaskWrapper().asHttp().getParams();
+    if (params == null) {
+      params = new HashMap<>();
+      mTarget.getTaskWrapper().asHttp().setParams(params);
+    }
+    params.put(key, value);
+    if (mTarget instanceof DownloadGroupTarget) {
+      for (DTaskWrapper subTask : ((DGTaskWrapper) mTarget.getTaskWrapper()).getSubTaskWrapper()) {
+        subTask.asHttp().setParams(params);
+      }
+    }
+    return mTarget;
+  }
+
+  @Override public void add() {
+    mTarget.add();
+  }
+
+  @Override public void start() {
+    mTarget.start();
+  }
+
+  @Override public void stop() {
+    mTarget.stop();
+  }
+
+  @Override public void resume() {
+    mTarget.resume();
+  }
+
+  @Override public void cancel() {
+    mTarget.cancel();
+  }
+
+  @Override public void save() {
+    mTarget.save();
+  }
+
+  @Override public void cancel(boolean removeFile) {
+    mTarget.cancel(removeFile);
+  }
+
+  @Override public void reTry() {
+    mTarget.reTry();
+  }
+
+  @Override public void reStart() {
+    mTarget.reStart();
+  }
+}
diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpHeaderDelegate.java b/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpHeaderDelegate.java
index 09bc976b..036be3da 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpHeaderDelegate.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpHeaderDelegate.java
@@ -17,10 +17,20 @@
 
 import android.support.annotation.NonNull;
 import android.text.TextUtils;
+import com.arialyy.aria.core.AriaManager;
+import com.arialyy.aria.core.download.DGTaskWrapper;
+import com.arialyy.aria.core.download.DTaskWrapper;
+import com.arialyy.aria.core.inf.AbsHttpFileLenAdapter;
 import com.arialyy.aria.core.inf.AbsTarget;
 import com.arialyy.aria.core.inf.AbsTaskWrapper;
+import com.arialyy.aria.core.inf.IHttpFileLenAdapter;
 import com.arialyy.aria.core.inf.IHttpHeaderDelegate;
+import com.arialyy.aria.core.upload.UTaskWrapper;
 import com.arialyy.aria.util.ALog;
+import com.arialyy.aria.util.CommonUtil;
+import java.io.File;
+import java.io.ObjectInputStream;
+import java.io.Serializable;
 import java.net.Proxy;
 import java.util.Collection;
 import java.util.Map;
@@ -80,7 +90,31 @@ public TARGET addHeaders(@NonNull Map<String, String> headers) {
     return mTarget;
   }
 
-  public void addHeader(AbsTaskWrapper taskWrapper, String key, String value) {
+  public TARGET setFileLenAdapter(AbsHttpFileLenAdapter adapter) {
+    if (adapter == null) {
+      throw new IllegalArgumentException("adapter为空");
+    }
+    try {
+      adapter.clone();
+      mTarget.getTaskWrapper().asHttp().setFileLenAdapter((IHttpFileLenAdapter) adapter.clone());
+    } catch (CloneNotSupportedException e) {
+      e.printStackTrace();
+    }
+    //// 以下代码有问题，匿名内部类不能序列化
+    //String objPath = String.format("%s/obj_temp/%s", AriaManager.APP.getFilesDir().getPath(),
+    //    adapter.hashCode());
+    //CommonUtil.writeObjToFile(objPath, adapter);
+    //IHttpFileLenAdapter newAdapter = (IHttpFileLenAdapter) CommonUtil.readObjFromFile(objPath);
+    //File temp = new File(objPath);
+    //if (temp.exists()) {
+    //  temp.delete();
+    //}
+    //mTarget.getTaskWrapper().asHttp().setFileLenAdapter(newAdapter);
+
+    return mTarget;
+  }
+
+  private void addHeader(AbsTaskWrapper taskWrapper, String key, String value) {
     HttpTaskDelegate taskDelegate = taskWrapper.asHttp();
     if (taskDelegate.getHeaders().get(key) == null) {
       taskDelegate.getHeaders().put(key, value);
@@ -89,7 +123,7 @@ public void addHeader(AbsTaskWrapper taskWrapper, String key, String value) {
     }
   }
 
-  public void addHeaders(AbsTaskWrapper taskWrapper, Map<String, String> headers) {
+  private void addHeaders(AbsTaskWrapper taskWrapper, Map<String, String> headers) {
     HttpTaskDelegate taskDelegate = taskWrapper.asHttp();
      /*
       两个map比较逻辑
diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpTaskDelegate.java b/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpTaskDelegate.java
index 5dadd800..f5ee86e7 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpTaskDelegate.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/http/HttpTaskDelegate.java
@@ -1,187 +1,198 @@
-/*
- * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.arialyy.aria.core.common.http;
-
-import com.arialyy.aria.core.common.RequestEnum;
-import com.arialyy.aria.core.inf.ITargetHeadDelegate;
-import java.net.CookieManager;
-import java.net.Proxy;
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * Http任务设置的信息，如：cookie、请求参数
- */
-public class HttpTaskDelegate implements ITargetHeadDelegate {
-
-  private CookieManager cookieManager;
-
-  /**
-   * 请求参数
-   */
-  private Map<String, String> params;
-
-  /**
-   * http 请求头
-   */
-  private Map<String, String> headers = new HashMap<>();
-
-  /**
-   * 字符编码，默认为"utf-8"
-   */
-  private String charSet = "utf-8";
-
-  /**
-   * 网络请求类型
-   */
-  private RequestEnum requestEnum = RequestEnum.GET;
-
-  /**
-   * 是否使用服务器通过content-disposition传递的文件名，内容格式{@code attachment; filename="filename.jpg"} {@code true}
-   * 使用
-   */
-  private boolean useServerFileName = false;
-
-  /**
-   * 重定向链接
-   */
-  private String redirectUrl = "";
-
-  /**
-   * 是否是chunk模式
-   */
-  private boolean isChunked = false;
-  /**
-   * 文件上传需要的key
-   */
-  private String attachment;
-  /**
-   * 上传的文件类型
-   */
-  private String contentType = "multipart/form-data";
-  private String userAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)";
-
-  private Proxy proxy;
-  /**
-   * 文件上传表单
-   */
-  private Map<String, String> formFields = new HashMap<>();
-
-  public Map<String, String> getFormFields() {
-    return formFields;
-  }
-
-  public void setFormFields(Map<String, String> formFields) {
-    this.formFields = formFields;
-  }
-
-  public String getAttachment() {
-    return attachment;
-  }
-
-  public void setAttachment(String attachment) {
-    this.attachment = attachment;
-  }
-
-  public String getContentType() {
-    return contentType;
-  }
-
-  public void setContentType(String contentType) {
-    this.contentType = contentType;
-  }
-
-  public String getUserAgent() {
-    return userAgent;
-  }
-
-  public void setUserAgent(String userAgent) {
-    this.userAgent = userAgent;
-  }
-
-  public boolean isChunked() {
-    return isChunked;
-  }
-
-  public void setChunked(boolean chunked) {
-    isChunked = chunked;
-  }
-
-  public CookieManager getCookieManager() {
-    return cookieManager;
-  }
-
-  public void setCookieManager(CookieManager cookieManager) {
-    this.cookieManager = cookieManager;
-  }
-
-  public Proxy getProxy() {
-    return proxy;
-  }
-
-  public void setProxy(Proxy proxy) {
-    this.proxy = proxy;
-  }
-
-  public Map<String, String> getHeaders() {
-    return headers;
-  }
-
-  public void setHeaders(Map<String, String> headers) {
-    this.headers = headers;
-  }
-
-  public String getCharSet() {
-    return charSet;
-  }
-
-  public void setCharSet(String charSet) {
-    this.charSet = charSet;
-  }
-
-  public RequestEnum getRequestEnum() {
-    return requestEnum;
-  }
-
-  public void setRequestEnum(RequestEnum requestEnum) {
-    this.requestEnum = requestEnum;
-  }
-
-  public boolean isUseServerFileName() {
-    return useServerFileName;
-  }
-
-  public void setUseServerFileName(boolean useServerFileName) {
-    this.useServerFileName = useServerFileName;
-  }
-
-  public String getRedirectUrl() {
-    return redirectUrl;
-  }
-
-  public void setRedirectUrl(String redirectUrl) {
-    this.redirectUrl = redirectUrl;
-  }
-
-  public Map<String, String> getParams() {
-    return params;
-  }
-
-  public void setParams(Map<String, String> params) {
-    this.params = params;
-  }
-}
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.arialyy.aria.core.common.http;
+
+import com.arialyy.aria.core.common.RequestEnum;
+import com.arialyy.aria.core.inf.IHttpFileLenAdapter;
+import com.arialyy.aria.core.inf.ITargetHeadDelegate;
+import java.net.CookieManager;
+import java.net.Proxy;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Http任务设置的信息，如：cookie、请求参数
+ */
+public class HttpTaskDelegate implements ITargetHeadDelegate {
+
+  private CookieManager cookieManager;
+
+  /**
+   * 请求参数
+   */
+  private Map<String, String> params;
+
+  /**
+   * http 请求头
+   */
+  private Map<String, String> headers = new HashMap<>();
+
+  /**
+   * 字符编码，默认为"utf-8"
+   */
+  private String charSet = "utf-8";
+
+  /**
+   * 网络请求类型
+   */
+  private RequestEnum requestEnum = RequestEnum.GET;
+
+  /**
+   * 是否使用服务器通过content-disposition传递的文件名，内容格式{@code attachment; filename="filename.jpg"} {@code true}
+   * 使用
+   */
+  private boolean useServerFileName = false;
+
+  /**
+   * 重定向链接
+   */
+  private String redirectUrl = "";
+
+  /**
+   * 是否是chunk模式
+   */
+  private boolean isChunked = false;
+  /**
+   * 文件上传需要的key
+   */
+  private String attachment;
+  /**
+   * 上传的文件类型
+   */
+  private String contentType = "multipart/form-data";
+  private String userAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)";
+
+  private Proxy proxy;
+  /**
+   * 文件上传表单
+   */
+  private Map<String, String> formFields = new HashMap<>();
+
+  private IHttpFileLenAdapter fileLenAdapter;
+
+  public IHttpFileLenAdapter getFileLenAdapter() {
+    return fileLenAdapter;
+  }
+
+  public void setFileLenAdapter(IHttpFileLenAdapter fileLenAdapter) {
+    this.fileLenAdapter = fileLenAdapter;
+  }
+
+  public Map<String, String> getFormFields() {
+    return formFields;
+  }
+
+  public void setFormFields(Map<String, String> formFields) {
+    this.formFields = formFields;
+  }
+
+  public String getAttachment() {
+    return attachment;
+  }
+
+  public void setAttachment(String attachment) {
+    this.attachment = attachment;
+  }
+
+  public String getContentType() {
+    return contentType;
+  }
+
+  public void setContentType(String contentType) {
+    this.contentType = contentType;
+  }
+
+  public String getUserAgent() {
+    return userAgent;
+  }
+
+  public void setUserAgent(String userAgent) {
+    this.userAgent = userAgent;
+  }
+
+  public boolean isChunked() {
+    return isChunked;
+  }
+
+  public void setChunked(boolean chunked) {
+    isChunked = chunked;
+  }
+
+  public CookieManager getCookieManager() {
+    return cookieManager;
+  }
+
+  public void setCookieManager(CookieManager cookieManager) {
+    this.cookieManager = cookieManager;
+  }
+
+  public Proxy getProxy() {
+    return proxy;
+  }
+
+  public void setProxy(Proxy proxy) {
+    this.proxy = proxy;
+  }
+
+  public Map<String, String> getHeaders() {
+    return headers;
+  }
+
+  public void setHeaders(Map<String, String> headers) {
+    this.headers = headers;
+  }
+
+  public String getCharSet() {
+    return charSet;
+  }
+
+  public void setCharSet(String charSet) {
+    this.charSet = charSet;
+  }
+
+  public RequestEnum getRequestEnum() {
+    return requestEnum;
+  }
+
+  public void setRequestEnum(RequestEnum requestEnum) {
+    this.requestEnum = requestEnum;
+  }
+
+  public boolean isUseServerFileName() {
+    return useServerFileName;
+  }
+
+  public void setUseServerFileName(boolean useServerFileName) {
+    this.useServerFileName = useServerFileName;
+  }
+
+  public String getRedirectUrl() {
+    return redirectUrl;
+  }
+
+  public void setRedirectUrl(String redirectUrl) {
+    this.redirectUrl = redirectUrl;
+  }
+
+  public Map<String, String> getParams() {
+    return params;
+  }
+
+  public void setParams(Map<String, String> params) {
+    this.params = params;
+  }
+}
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/AbsDGTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/AbsDGTarget.java
index c51871cc..44f35dce 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/AbsDGTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/AbsDGTarget.java
@@ -1,171 +1,68 @@
-/*
- * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.arialyy.aria.core.download;
-
-import android.support.annotation.CheckResult;
-import android.text.TextUtils;
-import com.arialyy.aria.core.inf.AbsEntity;
-import com.arialyy.aria.core.inf.AbsTarget;
-import com.arialyy.aria.core.inf.AbsTaskWrapper;
-import com.arialyy.aria.core.manager.SubTaskManager;
-import com.arialyy.aria.core.queue.DownloadGroupTaskQueue;
-import com.arialyy.aria.orm.DbEntity;
-import com.arialyy.aria.util.ALog;
-import java.io.File;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Created by lyy on 2017/7/26.
- */
-abstract class AbsDGTarget<TARGET extends AbsDGTarget> extends AbsTarget<TARGET> {
-
-  ///**
-  // * 组任务名
-  // */
-  //String mGroupHash;
-  ///**
-  // * 文件夹临时路径
-  // */
-  //String mDirPathTemp;
-  ///**
-  // * 是否需要修改路径
-  // */
-  //boolean needModifyPath = false;
-
-  private SubTaskManager mSubTaskManager;
-
-  /**
-   * 获取子任务管理器
-   *
-   * @return 子任务管理器
-   */
-  @CheckResult
-  public SubTaskManager getSubTaskManager() {
-    if (mSubTaskManager == null) {
-      mSubTaskManager = new SubTaskManager(getTargetName(), getTaskWrapper());
-    }
-    return mSubTaskManager;
-  }
-
-  @Override public DownloadGroupEntity getEntity() {
-    return (DownloadGroupEntity) super.getEntity();
-  }
-
-  @Override public DGTaskWrapper getTaskWrapper() {
-    return (DGTaskWrapper) super.getTaskWrapper();
-  }
-
-  /**
-   * 设置任务组别名
-   */
-  @CheckResult
-  public TARGET setGroupAlias(String alias) {
-    if (TextUtils.isEmpty(alias)) return (TARGET) this;
-    getEntity().setAlias(alias);
-    return (TARGET) this;
-  }
-
-  //@Override public boolean taskExists() {
-  //  return DbEntity.checkDataExist(DownloadGroupEntity.class, "groupHash=?", mGroupHash);
-  //}
-
-  ///**
-  // * 设置任务组的文件夹路径，在Aria中，任务组的所有子任务都会下载到以任务组组名的文件夹中。
-  // * 如：groupDirPath = "/mnt/sdcard/download/group_test"
-  // * <pre>
-  // *   {@code
-  // *      + mnt
-  // *        + sdcard
-  // *          + download
-  // *            + group_test
-  // *              - task1.apk
-  // *              - task2.apk
-  // *              - task3.apk
-  // *              ....
-  // *
-  // *   }
-  // * </pre>
-  // *
-  // * @param dirPath 任务组保存文件夹路径
-  // */
-  //@CheckResult
-  //public TARGET setDirPath(String dirPath) {
-  //  mDirPathTemp = dirPath;
-  //  return (TARGET) this;
-  //}
-
-  //@Override public boolean isRunning() {
-  //  DownloadGroupTask task = DownloadGroupTaskQueue.getInstance().getTask(getEntity().getKey());
-  //  return task != null && task.isRunning();
-  //}
-
-  ///**
-  // * 改变任务组文件夹路径，修改文件夹路径会将子任务所有路径更换
-  // *
-  // * @param newDirPath 新的文件夹路径
-  // */
-  //void reChangeDirPath(String newDirPath) {
-  //  List<DTaskWrapper> subTasks = getTaskWrapper().getSubTaskWrapper();
-  //  if (subTasks != null && !subTasks.isEmpty()) {
-  //    List<DbEntity> des = new ArrayList<>();
-  //    for (DTaskWrapper dte : subTasks) {
-  //      DownloadEntity de = dte.getEntity();
-  //      String oldPath = de.getDownloadPath();
-  //      String newPath = newDirPath + "/" + de.getFileName();
-  //      File file = new File(oldPath);
-  //      if (file.exists()) {
-  //        file.renameTo(new File(newPath));
-  //      }
-  //      de.setDownloadPath(newPath);
-  //      des.add(de);
-  //    }
-  //    AbsEntity.saveAll(des);
-  //  }
-  //}
-
-  ///**
-  // * 检查并设置文件夹路径
-  // *
-  // * @return {@code true} 合法
-  // */
-  //boolean checkDirPath() {
-  //  if (TextUtils.isEmpty(mDirPathTemp)) {
-  //    ALog.e(TAG, "文件夹路径不能为null");
-  //    return false;
-  //  } else if (!mDirPathTemp.startsWith("/")) {
-  //    ALog.e(TAG, "文件夹路径【" + mDirPathTemp + "】错误");
-  //    return false;
-  //  }
-  //  File file = new File(mDirPathTemp);
-  //  if (file.isFile()) {
-  //    ALog.e(TAG, "路径【" + mDirPathTemp + "】是文件，请设置文件夹路径");
-  //    return false;
-  //  }
-  //
-  //  if (TextUtils.isEmpty(getEntity().getDirPath()) || !getEntity().getDirPath()
-  //      .equals(mDirPathTemp)) {
-  //    if (!file.exists()) {
-  //      file.mkdirs();
-  //    }
-  //    needModifyPath = true;
-  //    getEntity().setDirPath(mDirPathTemp);
-  //    ALog.i(TAG, String.format("文件夹路径改变，将更新文件夹路径为：%s", mDirPathTemp));
-  //  }
-  //
-  //  return true;
-  //}
-}
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.core.download;
+
+import android.support.annotation.CheckResult;
+import android.text.TextUtils;
+import com.arialyy.aria.core.inf.AbsEntity;
+import com.arialyy.aria.core.inf.AbsTarget;
+import com.arialyy.aria.core.inf.AbsTaskWrapper;
+import com.arialyy.aria.core.manager.SubTaskManager;
+import com.arialyy.aria.core.queue.DownloadGroupTaskQueue;
+import com.arialyy.aria.orm.DbEntity;
+import com.arialyy.aria.util.ALog;
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by lyy on 2017/7/26.
+ */
+abstract class AbsDGTarget<TARGET extends AbsDGTarget> extends AbsTarget<TARGET> {
+
+  private SubTaskManager mSubTaskManager;
+
+  /**
+   * 获取子任务管理器
+   *
+   * @return 子任务管理器
+   */
+  @CheckResult
+  public SubTaskManager getSubTaskManager() {
+    if (mSubTaskManager == null) {
+      mSubTaskManager = new SubTaskManager(getTargetName(), getTaskWrapper());
+    }
+    return mSubTaskManager;
+  }
+
+  @Override public DownloadGroupEntity getEntity() {
+    return (DownloadGroupEntity) super.getEntity();
+  }
+
+  @Override public DGTaskWrapper getTaskWrapper() {
+    return (DGTaskWrapper) super.getTaskWrapper();
+  }
+
+  /**
+   * 设置任务组别名
+   */
+  @CheckResult
+  public TARGET setGroupAlias(String alias) {
+    if (TextUtils.isEmpty(alias)) return (TARGET) this;
+    getEntity().setAlias(alias);
+    return (TARGET) this;
+  }
+}
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupListener.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupListener.java
index 2976704a..30fb6bd3 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupListener.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupListener.java
@@ -134,7 +134,7 @@ protected void saveData(int state, long location) {
     mTaskWrapper.setState(state);
     mEntity.setState(state);
     if (state == IEntity.STATE_CANCEL) {
-      CommonUtil.delGroupTaskRecord(mTaskWrapper.isRemoveFile(), mEntity);
+      CommonUtil.delGroupTaskRecord(mEntity, mTaskWrapper.isRemoveFile());
       return;
     } else if (state == IEntity.STATE_STOP) {
       mEntity.setStopTime(System.currentTimeMillis());
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java
index 834b5372..0d1b3a82 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadGroupTarget.java
@@ -19,6 +19,8 @@
 import android.support.annotation.NonNull;
 import com.arialyy.aria.core.common.http.HttpHeaderDelegate;
 import com.arialyy.aria.core.common.http.PostDelegate;
+import com.arialyy.aria.core.inf.AbsHttpFileLenAdapter;
+import com.arialyy.aria.core.inf.IHttpFileLenAdapter;
 import com.arialyy.aria.core.inf.IHttpHeaderDelegate;
 import com.arialyy.aria.core.manager.TaskWrapperManager;
 import com.arialyy.aria.exception.ParamException;
@@ -157,6 +159,13 @@ public DownloadGroupTarget setSubFileName(List<String> subTaskFileName) {
     return mGroupDelegate.setSubFileName(subTaskFileName);
   }
 
+  /**
+   * 如果你需要使用header中特定的key来设置文件长度，或有定制文件长度的需要，那么你可以通过该方法自行处理文件长度
+   */
+  public DownloadGroupTarget setFileLenAdapter(AbsHttpFileLenAdapter adapter) {
+    return mHeaderDelegate.setFileLenAdapter(adapter);
+  }
+
   @Override public int getTargetType() {
     return GROUP_HTTP;
   }
@@ -175,17 +184,11 @@ public DownloadGroupTarget setSubFileName(List<String> subTaskFileName) {
 
   @CheckResult
   @Override public DownloadGroupTarget addHeader(@NonNull String key, @NonNull String value) {
-    for (DTaskWrapper subTask : getTaskWrapper().getSubTaskWrapper()) {
-      mHeaderDelegate.addHeader(subTask, key, value);
-    }
     return mHeaderDelegate.addHeader(key, value);
   }
 
   @CheckResult
   @Override public DownloadGroupTarget addHeaders(Map<String, String> headers) {
-    for (DTaskWrapper subTask : getTaskWrapper().getSubTaskWrapper()) {
-      mHeaderDelegate.addHeaders(subTask, headers);
-    }
     return mHeaderDelegate.addHeaders(headers);
   }
 
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
index eca02c0d..76af4ad4 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/DownloadTarget.java
@@ -1,147 +1,156 @@
-/*
- * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.arialyy.aria.core.download;
-
-import android.support.annotation.CheckResult;
-import android.support.annotation.NonNull;
-import com.arialyy.aria.core.common.http.GetDelegate;
-import com.arialyy.aria.core.common.http.HttpHeaderDelegate;
-import com.arialyy.aria.core.common.http.PostDelegate;
-import com.arialyy.aria.core.inf.IHttpHeaderDelegate;
-import java.net.Proxy;
-import java.util.Map;
-
-/**
- * Created by lyy on 2016/12/5.
- * https://github.com/AriaLyy/Aria
- */
-public class DownloadTarget extends AbsDTarget<DownloadTarget>
-    implements IHttpHeaderDelegate<DownloadTarget> {
-  private HttpHeaderDelegate<DownloadTarget> mHeaderDelegate;
-  private DNormalDelegate<DownloadTarget> mNormalDelegate;
-
-  DownloadTarget(DownloadEntity entity, String targetName) {
-    this(entity.getUrl(), targetName);
-  }
-
-  DownloadTarget(String url, String targetName) {
-    mNormalDelegate = new DNormalDelegate<>(this, url, targetName);
-    mHeaderDelegate = new HttpHeaderDelegate<>(this);
-  }
-
-  /**
-   * Post处理
-   */
-  @CheckResult
-  public PostDelegate asPost() {
-    return new PostDelegate<>(this);
-  }
-
-  /**
-   * get参数传递
-   */
-  @CheckResult
-  public GetDelegate asGet() {
-    return new GetDelegate<>(this);
-  }
-
-  /**
-   * 是否使用服务器通过content-disposition传递的文件名，内容格式{@code attachment;filename=***}
-   * 如果获取不到服务器文件名，则使用用户设置的文件名
-   *
-   * @param use {@code true} 使用
-   */
-  @CheckResult
-  public DownloadTarget useServerFileName(boolean use) {
-    getTaskWrapper().asHttp().setUseServerFileName(use);
-    return this;
-  }
-
-  /**
-   * 设置文件存储路径，如果需要修改新的文件名，修改路径便可。
-   * 如：原文件路径 /mnt/sdcard/test.zip
-   * 如果需要将test.zip改为game.zip，只需要重新设置文件路径为：/mnt/sdcard/game.zip
-   *
-   * @param filePath 路径必须为文件路径，不能为文件夹路径
-   */
-  @CheckResult
-  public DownloadTarget setFilePath(@NonNull String filePath) {
-    mNormalDelegate.setTempFilePath(filePath);
-    return this;
-  }
-
-  /**
-   * 设置文件存储路径，如果需要修改新的文件名，修改路径便可。
-   * 如：原文件路径 /mnt/sdcard/test.zip
-   * 如果需要将test.zip改为game.zip，只需要重新设置文件路径为：/mnt/sdcard/game.zip
-   *
-   * @param filePath 路径必须为文件路径，不能为文件夹路径
-   * @param forceDownload {@code true}强制下载，不考虑文件路径是否被占用
-   */
-  @CheckResult
-  public DownloadTarget setFilePath(@NonNull String filePath, boolean forceDownload) {
-    mNormalDelegate.setTempFilePath(filePath);
-    mNormalDelegate.setForceDownload(forceDownload);
-    return this;
-  }
-
-  /**
-   * 从header中获取文件描述信息
-   */
-  public String getContentDisposition() {
-    return getEntity().getDisposition();
-  }
-
-  @Override public DownloadTarget updateUrl(String newUrl) {
-    return mNormalDelegate.updateUrl(newUrl);
-  }
-
-  @Override public int getTargetType() {
-    return HTTP;
-  }
-
-  /**
-   * 设置URL的代理
-   *
-   * @param proxy {@link Proxy}
-   */
-  @CheckResult
-  @Override public DownloadTarget setUrlProxy(Proxy proxy) {
-    return mHeaderDelegate.setUrlProxy(proxy);
-  }
-
-  @CheckResult
-  @Override public DownloadTarget addHeader(@NonNull String key, @NonNull String value) {
-    return mHeaderDelegate.addHeader(key, value);
-  }
-
-  @CheckResult
-  @Override public DownloadTarget addHeaders(Map<String, String> headers) {
-    return mHeaderDelegate.addHeaders(headers);
-  }
-
-  @Override protected boolean checkEntity() {
-    return mNormalDelegate.checkEntity();
-  }
-
-  @Override public boolean isRunning() {
-    return mNormalDelegate.isRunning();
-  }
-
-  @Override public boolean taskExists() {
-    return mNormalDelegate.taskExists();
-  }
-}
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.core.download;
+
+import android.support.annotation.CheckResult;
+import android.support.annotation.NonNull;
+import com.arialyy.aria.core.common.http.GetDelegate;
+import com.arialyy.aria.core.common.http.HttpHeaderDelegate;
+import com.arialyy.aria.core.common.http.PostDelegate;
+import com.arialyy.aria.core.inf.IHttpFileLenAdapter;
+import com.arialyy.aria.core.inf.IHttpHeaderDelegate;
+import java.net.Proxy;
+import java.util.Map;
+
+/**
+ * Created by lyy on 2016/12/5.
+ * https://github.com/AriaLyy/Aria
+ */
+public class DownloadTarget extends AbsDTarget<DownloadTarget>
+    implements IHttpHeaderDelegate<DownloadTarget> {
+  private HttpHeaderDelegate<DownloadTarget> mHeaderDelegate;
+  private DNormalDelegate<DownloadTarget> mNormalDelegate;
+
+  DownloadTarget(DownloadEntity entity, String targetName) {
+    this(entity.getUrl(), targetName);
+  }
+
+  DownloadTarget(String url, String targetName) {
+    mNormalDelegate = new DNormalDelegate<>(this, url, targetName);
+    mHeaderDelegate = new HttpHeaderDelegate<>(this);
+  }
+
+  /**
+   * Post处理
+   */
+  @CheckResult
+  public PostDelegate asPost() {
+    return new PostDelegate<>(this);
+  }
+
+  /**
+   * get参数传递
+   */
+  @CheckResult
+  public GetDelegate asGet() {
+    return new GetDelegate<>(this);
+  }
+
+  /**
+   * 是否使用服务器通过content-disposition传递的文件名，内容格式{@code attachment;filename=***}
+   * 如果获取不到服务器文件名，则使用用户设置的文件名
+   *
+   * @param use {@code true} 使用
+   */
+  @CheckResult
+  public DownloadTarget useServerFileName(boolean use) {
+    getTaskWrapper().asHttp().setUseServerFileName(use);
+    return this;
+  }
+
+  /**
+   * 设置文件存储路径，如果需要修改新的文件名，修改路径便可。
+   * 如：原文件路径 /mnt/sdcard/test.zip
+   * 如果需要将test.zip改为game.zip，只需要重新设置文件路径为：/mnt/sdcard/game.zip
+   *
+   * @param filePath 路径必须为文件路径，不能为文件夹路径
+   */
+  @CheckResult
+  public DownloadTarget setFilePath(@NonNull String filePath) {
+    mNormalDelegate.setTempFilePath(filePath);
+    return this;
+  }
+
+  /**
+   * 设置文件存储路径，如果需要修改新的文件名，修改路径便可。
+   * 如：原文件路径 /mnt/sdcard/test.zip
+   * 如果需要将test.zip改为game.zip，只需要重新设置文件路径为：/mnt/sdcard/game.zip
+   *
+   * @param filePath 路径必须为文件路径，不能为文件夹路径
+   * @param forceDownload {@code true}强制下载，不考虑文件路径是否被占用
+   */
+  @CheckResult
+  public DownloadTarget setFilePath(@NonNull String filePath, boolean forceDownload) {
+    mNormalDelegate.setTempFilePath(filePath);
+    mNormalDelegate.setForceDownload(forceDownload);
+    return this;
+  }
+
+  /**
+   * 如果你需要使用header中特定的key来设置文件长度，或有定制文件长度的需要，那么你可以通过该方法自行处理文件长度
+   */
+  public DownloadTarget setFileLenAdapter(IHttpFileLenAdapter adapter) {
+    //return mHeaderDelegate.setFileLenAdapter(adapter);
+    return this;
+  }
+
+  /**
+   * 从header中获取文件描述信息
+   */
+  public String getContentDisposition() {
+    return getEntity().getDisposition();
+  }
+
+  @Override public DownloadTarget updateUrl(String newUrl) {
+    return mNormalDelegate.updateUrl(newUrl);
+  }
+
+  @Override public int getTargetType() {
+    return HTTP;
+  }
+
+  /**
+   * 设置URL的代理
+   *
+   * @param proxy {@link Proxy}
+   */
+  @CheckResult
+  @Override public DownloadTarget setUrlProxy(Proxy proxy) {
+    return mHeaderDelegate.setUrlProxy(proxy);
+  }
+
+  @CheckResult
+  @Override public DownloadTarget addHeader(@NonNull String key, @NonNull String value) {
+    return mHeaderDelegate.addHeader(key, value);
+  }
+
+  @CheckResult
+  @Override public DownloadTarget addHeaders(Map<String, String> headers) {
+    return mHeaderDelegate.addHeaders(headers);
+  }
+
+  @Override protected boolean checkEntity() {
+    return mNormalDelegate.checkEntity();
+  }
+
+  @Override public boolean isRunning() {
+    return mNormalDelegate.isRunning();
+  }
+
+  @Override public boolean taskExists() {
+    return mNormalDelegate.taskExists();
+  }
+}
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/FtpFileInfoThread.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/FtpFileInfoThread.java
index 31fcf744..cbc8f18c 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/FtpFileInfoThread.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/FtpFileInfoThread.java
@@ -38,8 +38,7 @@ class FtpFileInfoThread extends AbsFtpInfoThread<DownloadEntity, DTaskWrapper> {
   @Override protected void handleFile(String remotePath, FTPFile ftpFile) {
     super.handleFile(remotePath, ftpFile);
     if (!CommonUtil.checkSDMemorySpace(mEntity.getDownloadPath(), ftpFile.getSize())) {
-      mCallback.onFail(mEntity.getUrl(),
-          new AriaIOException(TAG,
+      mCallback.onFail(mEntity, new AriaIOException(TAG,
               String.format("获取ftp文件信息失败，内存空间不足, filePath: %s", mEntity.getDownloadPath())),
           false);
     }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/FtpThreadTask.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/FtpThreadTask.java
index ecc33f3b..466f69f7 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/FtpThreadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/FtpThreadTask.java
@@ -48,31 +48,31 @@ class FtpThreadTask extends AbsFtpThreadTask<DownloadEntity, DTaskWrapper> {
   FtpThreadTask(StateConstance constance, IDownloadListener listener,
       SubThreadConfig<DTaskWrapper> downloadInfo) {
     super(constance, listener, downloadInfo);
-    isOpenDynamicFile = STATE.TASK_RECORD.isOpenDynamicFile;
-    isBlock = STATE.TASK_RECORD.isBlock;
+    isOpenDynamicFile = getState().TASK_RECORD.isOpenDynamicFile;
+    isBlock = getState().TASK_RECORD.isBlock;
   }
 
   @Override public FtpThreadTask call() throws Exception {
     super.call();
-    if (mConfig.THREAD_RECORD.isComplete) {
+    if (getConfig().THREAD_RECORD.isComplete) {
       handleComplete();
       return this;
     }
-    mChildCurrentLocation = mConfig.START_LOCATION;
+    mChildCurrentLocation = getConfig().START_LOCATION;
     FTPClient client = null;
     InputStream is = null;
 
     try {
       ALog.d(TAG,
-          String.format("任务【%s】线程__%s__开始下载【开始位置 : %s，结束位置：%s】", mConfig.TEMP_FILE.getName(),
-              mConfig.THREAD_ID, mConfig.START_LOCATION, mConfig.END_LOCATION));
+          String.format("任务【%s】线程__%s__开始下载【开始位置 : %s，结束位置：%s】", getConfig().TEMP_FILE.getName(),
+              getConfig().THREAD_ID, getConfig().START_LOCATION, getConfig().END_LOCATION));
       client = createClient();
       if (client == null) {
         fail(mChildCurrentLocation, new TaskException(TAG, "ftp client 创建失败"));
         return this;
       }
-      if (mConfig.START_LOCATION > 0) {
-        client.setRestartOffset(mConfig.START_LOCATION);
+      if (getConfig().START_LOCATION > 0) {
+        client.setRestartOffset(getConfig().START_LOCATION);
       }
       //发送第二次指令时，还需要再做一次判断
       int reply = client.getReplyCode();
@@ -84,7 +84,7 @@ class FtpThreadTask extends AbsFtpThreadTask<DownloadEntity, DTaskWrapper> {
         return this;
       }
       String remotePath =
-          new String(mTaskWrapper.asFtp().getUrlEntity().remotePath.getBytes(charSet),
+          new String(getTaskWrapper().asFtp().getUrlEntity().remotePath.getBytes(charSet),
               SERVER_CHARSET);
       ALog.i(TAG, String.format("remotePath【%s】", remotePath));
       is = client.retrieveFileStream(remotePath);
@@ -105,10 +105,10 @@ class FtpThreadTask extends AbsFtpThreadTask<DownloadEntity, DTaskWrapper> {
       }
     } catch (IOException e) {
       fail(mChildCurrentLocation,
-          new AriaIOException(TAG, String.format("下载失败【%s】", mConfig.URL), e));
+          new AriaIOException(TAG, String.format("下载失败【%s】", getConfig().URL), e));
     } catch (Exception e) {
       fail(mChildCurrentLocation,
-          new AriaIOException(TAG, String.format("下载失败【%s】", mConfig.URL), e));
+          new AriaIOException(TAG, String.format("下载失败【%s】", getConfig().URL), e));
     } finally {
       try {
         if (is != null) {
@@ -135,28 +135,28 @@ private void handleComplete() {
       return;
     }
     ALog.i(TAG,
-        String.format("任务【%s】线程__%s__下载完毕", mConfig.TEMP_FILE.getName(), mConfig.THREAD_ID));
-    writeConfig(true, mConfig.END_LOCATION);
-    STATE.COMPLETE_THREAD_NUM++;
-    if (STATE.isComplete()) {
+        String.format("任务【%s】线程__%s__下载完毕", getConfig().TEMP_FILE.getName(), getConfig().THREAD_ID));
+    writeConfig(true, getConfig().END_LOCATION);
+    getState().COMPLETE_THREAD_NUM++;
+    if (getState().isComplete()) {
       if (isBlock) {
         boolean success = mergeFile();
         if (!success) {
-          //ALog.e(TAG, String.format("任务【%s】分块文件合并失败", mConfig.TEMP_FILE.getName()));
-          STATE.isRunning = false;
+          //ALog.e(TAG, String.format("任务【%s】分块文件合并失败", getConfig().TEMP_FILE.getName()));
+          getState().isRunning = false;
           mListener.onFail(false,
-              new TaskException(TAG, String.format("任务【%s】分块文件合并失败", mConfig.TEMP_FILE.getName())));
+              new TaskException(TAG, String.format("任务【%s】分块文件合并失败", getConfig().TEMP_FILE.getName())));
           return;
         }
       }
-      STATE.TASK_RECORD.deleteData();
-      STATE.isRunning = false;
+      getState().TASK_RECORD.deleteData();
+      getState().isRunning = false;
       mListener.onComplete();
     }
-    if (STATE.isFail()) {
-      STATE.isRunning = false;
+    if (getState().isFail()) {
+      getState().isRunning = false;
       mListener.onFail(false,
-          new TaskException(TAG, String.format("任务【%s】下载失败", mConfig.TEMP_FILE.getName())));
+          new TaskException(TAG, String.format("任务【%s】下载失败", getConfig().TEMP_FILE.getName())));
     }
   }
 
@@ -169,7 +169,7 @@ private void readDynamicFile(InputStream is) {
     ReadableByteChannel fic = null;
     try {
       int len;
-      fos = new FileOutputStream(mConfig.TEMP_FILE, true);
+      fos = new FileOutputStream(getConfig().TEMP_FILE, true);
       foc = fos.getChannel();
       fic = Channels.newChannel(is);
       ByteBuffer bf = ByteBuffer.allocate(getTaskConfig().getBuffSize());
@@ -180,8 +180,8 @@ private void readDynamicFile(InputStream is) {
         if (mSpeedBandUtil != null) {
           mSpeedBandUtil.limitNextBytes(len);
         }
-        if (mChildCurrentLocation + len >= mConfig.END_LOCATION) {
-          len = (int) (mConfig.END_LOCATION - mChildCurrentLocation);
+        if (mChildCurrentLocation + len >= getConfig().END_LOCATION) {
+          len = (int) (getConfig().END_LOCATION - mChildCurrentLocation);
           bf.flip();
           fos.write(bf.array(), 0, len);
           bf.compact();
@@ -197,7 +197,7 @@ private void readDynamicFile(InputStream is) {
       handleComplete();
     } catch (IOException e) {
       fail(mChildCurrentLocation,
-          new AriaIOException(TAG, String.format("下载失败【%s】", mConfig.URL), e));
+          new AriaIOException(TAG, String.format("下载失败【%s】", getConfig().URL), e));
     } finally {
       try {
         if (fos != null) {
@@ -221,8 +221,8 @@ private void readDynamicFile(InputStream is) {
   private void readNormal(InputStream is) {
     BufferedRandomAccessFile file = null;
     try {
-      file = new BufferedRandomAccessFile(mConfig.TEMP_FILE, "rwd", getTaskConfig().getBuffSize());
-      file.seek(mConfig.START_LOCATION);
+      file = new BufferedRandomAccessFile(getConfig().TEMP_FILE, "rwd", getTaskConfig().getBuffSize());
+      file.seek(getConfig().START_LOCATION);
       byte[] buffer = new byte[getTaskConfig().getBuffSize()];
       int len;
       while (isLive() && (len = is.read(buffer)) != -1) {
@@ -232,8 +232,8 @@ private void readNormal(InputStream is) {
         if (mSpeedBandUtil != null) {
           mSpeedBandUtil.limitNextBytes(len);
         }
-        if (mChildCurrentLocation + len >= mConfig.END_LOCATION) {
-          len = (int) (mConfig.END_LOCATION - mChildCurrentLocation);
+        if (mChildCurrentLocation + len >= getConfig().END_LOCATION) {
+          len = (int) (getConfig().END_LOCATION - mChildCurrentLocation);
           file.write(buffer, 0, len);
           progress(len);
           break;
@@ -244,7 +244,7 @@ private void readNormal(InputStream is) {
       }
     } catch (IOException e) {
       fail(mChildCurrentLocation,
-          new AriaIOException(TAG, String.format("下载失败【%s】", mConfig.URL), e));
+          new AriaIOException(TAG, String.format("下载失败【%s】", getConfig().URL), e));
     } finally {
       try {
         if (file != null) {
@@ -261,6 +261,6 @@ private void readNormal(InputStream is) {
   }
 
   @Override protected DownloadConfig getTaskConfig() {
-    return mTaskWrapper.getConfig();
+    return getTaskWrapper().getConfig();
   }
 }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpFileInfoThread.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpFileInfoThread.java
index 4e8c14d9..5ae5eeb8 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpFileInfoThread.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpFileInfoThread.java
@@ -25,6 +25,7 @@
 import com.arialyy.aria.core.download.DTaskWrapper;
 import com.arialyy.aria.core.download.DownloadEntity;
 import com.arialyy.aria.core.common.http.HttpTaskDelegate;
+import com.arialyy.aria.core.inf.IHttpFileLenAdapter;
 import com.arialyy.aria.exception.AriaIOException;
 import com.arialyy.aria.exception.BaseException;
 import com.arialyy.aria.exception.TaskException;
@@ -109,22 +110,11 @@ private void handleConnect(HttpURLConnection conn) throws IOException {
       }
     }
 
-    long len = conn.getContentLength();
-    if (len < 0) {
-      String temp = conn.getHeaderField("Content-Length");
-      len = TextUtils.isEmpty(temp) ? -1 : Long.parseLong(temp);
-      // 某些服务，如果设置了conn.setRequestProperty("Range", "bytes=" + 0 + "-");
-      // 会返回 Content-Range: bytes 0-225427911/225427913
-      if (len < 0) {
-        temp = conn.getHeaderField("Content-Range");
-        if (TextUtils.isEmpty(temp)) {
-          len = -1;
-        } else {
-          int start = temp.indexOf("/");
-          len = Long.parseLong(temp.substring(start + 1));
-        }
-      }
+    IHttpFileLenAdapter lenAdapter = mTaskWrapper.asHttp().getFileLenAdapter();
+    if (lenAdapter == null) {
+      lenAdapter = new FileLenAdapter();
     }
+    long len = lenAdapter.handleFileLen(conn.getHeaderFields());
 
     if (!CommonUtil.checkSDMemorySpace(mEntity.getDownloadPath(), len)) {
       failDownload(new TaskException(TAG,
@@ -288,7 +278,7 @@ private void handleUrlReTurn(HttpURLConnection conn, String newUrl) throws IOExc
     if (TextUtils.isEmpty(newUrl) || newUrl.equalsIgnoreCase("null") || !newUrl.startsWith(
         "http")) {
       if (onFileInfoCallback != null) {
-        onFileInfoCallback.onFail(mEntity.getUrl(), new TaskException(TAG, "获取重定向链接失败"), false);
+        onFileInfoCallback.onFail(mEntity, new TaskException(TAG, "获取重定向链接失败"), false);
       }
       return;
     }
@@ -327,7 +317,32 @@ private boolean checkLen(long len) {
 
   private void failDownload(BaseException e, boolean needRetry) {
     if (onFileInfoCallback != null) {
-      onFileInfoCallback.onFail(mEntity.getUrl(), e, needRetry);
+      onFileInfoCallback.onFail(mEntity, e, needRetry);
+    }
+  }
+
+  private static class FileLenAdapter implements IHttpFileLenAdapter {
+
+    @Override public long handleFileLen(Map<String, List<String>> headers) {
+      List<String> sLength = headers.get("Content-Length");
+      if (sLength == null || sLength.isEmpty()) {
+        return -1;
+      }
+      String temp = sLength.get(0);
+      long len = TextUtils.isEmpty(temp) ? -1 : Long.parseLong(temp);
+      // 某些服务，如果设置了conn.setRequestProperty("Range", "bytes=" + 0 + "-");
+      // 会返回 Content-Range: bytes 0-225427911/225427913
+      if (len < 0) {
+        List<String> sRange = headers.get("Content-Range");
+        if (sRange == null || sRange.isEmpty()) {
+          len = -1;
+        } else {
+          int start = temp.indexOf("/");
+          len = Long.parseLong(temp.substring(start + 1));
+        }
+      }
+
+      return len;
     }
   }
 }
\ No newline at end of file
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpThreadTask.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpThreadTask.java
index 2b482674..088a183f 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpThreadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/HttpThreadTask.java
@@ -55,8 +55,8 @@ final class HttpThreadTask extends AbsThreadTask<DownloadEntity, DTaskWrapper> {
   HttpThreadTask(StateConstance constance, IDownloadListener listener,
       SubThreadConfig<DTaskWrapper> downloadInfo) {
     super(constance, listener, downloadInfo);
-    isOpenDynamicFile = STATE.TASK_RECORD.isOpenDynamicFile;
-    isBlock = STATE.TASK_RECORD.isBlock;
+    isOpenDynamicFile = getState().TASK_RECORD.isOpenDynamicFile;
+    isBlock = getState().TASK_RECORD.isBlock;
   }
 
   @Override public HttpThreadTask call() throws Exception {
@@ -69,17 +69,17 @@ final class HttpThreadTask extends AbsThreadTask<DownloadEntity, DTaskWrapper> {
     BufferedInputStream is = null;
     BufferedRandomAccessFile file = null;
     //当前子线程的下载位置
-    mChildCurrentLocation = mConfig.START_LOCATION;
+    mChildCurrentLocation = getConfig().START_LOCATION;
     try {
-      HttpTaskDelegate taskDelegate = mTaskWrapper.asHttp();
-      URL url = ConnectionHelp.handleUrl(mConfig.URL, taskDelegate);
+      HttpTaskDelegate taskDelegate = getTaskWrapper().asHttp();
+      URL url = ConnectionHelp.handleUrl(getConfig().URL, taskDelegate);
       conn = ConnectionHelp.handleConnection(url, taskDelegate);
-      if (mConfig.SUPPORT_BP) {
+      if (getConfig().SUPPORT_BP) {
         ALog.d(TAG,
-            String.format("任务【%s】线程__%s__开始下载【开始位置 : %s，结束位置：%s】", mConfig.TEMP_FILE.getName(),
-                mConfig.THREAD_ID, mConfig.START_LOCATION, mConfig.END_LOCATION));
-        conn.setRequestProperty("Range",
-            String.format("bytes=%s-%s", mConfig.START_LOCATION, (mConfig.END_LOCATION - 1)));
+            String.format("任务【%s】线程__%s__开始下载【开始位置 : %s，结束位置：%s】", getConfig().TEMP_FILE.getName(),
+                getConfig().THREAD_ID, getConfig().START_LOCATION, getConfig().END_LOCATION));
+        conn.setRequestProperty("Range", String.format("bytes=%s-%s", getConfig().START_LOCATION,
+            (getConfig().END_LOCATION - 1)));
       } else {
         ALog.w(TAG, "该下载不支持断点");
       }
@@ -117,24 +117,25 @@ final class HttpThreadTask extends AbsThreadTask<DownloadEntity, DTaskWrapper> {
       } else {
         //创建可设置位置的文件
         file =
-            new BufferedRandomAccessFile(mConfig.TEMP_FILE, "rwd", getTaskConfig().getBuffSize());
+            new BufferedRandomAccessFile(getConfig().TEMP_FILE, "rwd",
+                getTaskConfig().getBuffSize());
         //设置每条线程写入文件的位置
-        file.seek(mConfig.START_LOCATION);
+        file.seek(getConfig().START_LOCATION);
         readNormal(is, file);
         handleComplete();
       }
     } catch (MalformedURLException e) {
       fail(mChildCurrentLocation, new TaskException(TAG,
-          String.format("任务【%s】下载失败，filePath: %s, url: %s", mConfig.TEMP_FILE.getName(),
-              mEntity.getDownloadPath(), mEntity.getUrl()), e));
+          String.format("任务【%s】下载失败，filePath: %s, url: %s", getConfig().TEMP_FILE.getName(),
+              getEntity().getDownloadPath(), getEntity().getUrl()), e));
     } catch (IOException e) {
       fail(mChildCurrentLocation, new TaskException(TAG,
-          String.format("任务【%s】下载失败，filePath: %s, url: %s", mConfig.TEMP_FILE.getName(),
-              mEntity.getDownloadPath(), mEntity.getUrl()), e));
+          String.format("任务【%s】下载失败，filePath: %s, url: %s", getConfig().TEMP_FILE.getName(),
+              getEntity().getDownloadPath(), getEntity().getUrl()), e));
     } catch (Exception e) {
       fail(mChildCurrentLocation, new TaskException(TAG,
-          String.format("任务【%s】下载失败，filePath: %s, url: %s", mConfig.TEMP_FILE.getName(),
-              mEntity.getDownloadPath(), mEntity.getUrl()), e));
+          String.format("任务【%s】下载失败，filePath: %s, url: %s", getConfig().TEMP_FILE.getName(),
+              getEntity().getDownloadPath(), getEntity().getUrl()), e));
     } finally {
       try {
         if (file != null) {
@@ -159,7 +160,7 @@ final class HttpThreadTask extends AbsThreadTask<DownloadEntity, DTaskWrapper> {
   private void readChunked(InputStream is) {
     FileOutputStream fos = null;
     try {
-      fos = new FileOutputStream(mConfig.TEMP_FILE, true);
+      fos = new FileOutputStream(getConfig().TEMP_FILE, true);
       byte[] buffer = new byte[getTaskConfig().getBuffSize()];
       int len;
       while (isLive() && (len = is.read(buffer)) != -1) {
@@ -175,7 +176,7 @@ private void readChunked(InputStream is) {
       handleComplete();
     } catch (IOException e) {
       fail(mChildCurrentLocation, new AriaIOException(TAG,
-          String.format("文件下载失败，savePath: %s, url: %s", mEntity.getDownloadPath(), mConfig.URL),
+          String.format("文件下载失败，savePath: %s, url: %s", getEntity().getDownloadPath(), getConfig().URL),
           e));
     } finally {
       if (fos != null) {
@@ -197,7 +198,7 @@ private void readDynamicFile(InputStream is) {
     ReadableByteChannel fic = null;
     try {
       int len;
-      fos = new FileOutputStream(mConfig.TEMP_FILE, true);
+      fos = new FileOutputStream(getConfig().TEMP_FILE, true);
       foc = fos.getChannel();
       fic = Channels.newChannel(is);
       ByteBuffer bf = ByteBuffer.allocate(getTaskConfig().getBuffSize());
@@ -210,8 +211,8 @@ private void readDynamicFile(InputStream is) {
         if (mSpeedBandUtil != null) {
           mSpeedBandUtil.limitNextBytes(len);
         }
-        if (mChildCurrentLocation + len >= mConfig.END_LOCATION) {
-          len = (int) (mConfig.END_LOCATION - mChildCurrentLocation);
+        if (mChildCurrentLocation + len >= getConfig().END_LOCATION) {
+          len = (int) (getConfig().END_LOCATION - mChildCurrentLocation);
           bf.flip();
           fos.write(bf.array(), 0, len);
           bf.compact();
@@ -227,7 +228,7 @@ private void readDynamicFile(InputStream is) {
       handleComplete();
     } catch (IOException e) {
       fail(mChildCurrentLocation, new AriaIOException(TAG,
-          String.format("文件下载失败，savePath: %s, url: %s", mEntity.getDownloadPath(), mConfig.URL),
+          String.format("文件下载失败，savePath: %s, url: %s", getEntity().getDownloadPath(), getConfig().URL),
           e));
     } finally {
       try {
@@ -276,48 +277,49 @@ private void handleComplete() {
     if (!checkBlock()) {
       return;
     }
-    if (mTaskWrapper.asHttp().isChunked()) {
+    if (getTaskWrapper().asHttp().isChunked()) {
       ALog.i(TAG, "任务下载完成");
-      STATE.isRunning = false;
+      getState().isRunning = false;
       mListener.onComplete();
       return;
     }
 
-    if (mChildCurrentLocation == mConfig.END_LOCATION) {
+    if (mChildCurrentLocation == getConfig().END_LOCATION) {
       //支持断点的处理
-      if (mConfig.SUPPORT_BP) {
+      if (getConfig().SUPPORT_BP) {
         ALog.i(TAG,
-            String.format("任务【%s】线程__%s__下载完毕", mConfig.TEMP_FILE.getName(), mConfig.THREAD_ID));
-        writeConfig(true, mConfig.END_LOCATION);
-        STATE.COMPLETE_THREAD_NUM++;
-        if (STATE.isComplete()) {
+            String.format("任务【%s】线程__%s__下载完毕", getConfig().TEMP_FILE.getName(),
+                getConfig().THREAD_ID));
+        writeConfig(true, getConfig().END_LOCATION);
+        getState().COMPLETE_THREAD_NUM++;
+        if (getState().isComplete()) {
           if (isBlock) {
             boolean success = mergeFile();
             if (!success) {
-              STATE.isRunning = false;
+              getState().isRunning = false;
               mListener.onFail(false, new TaskException(TAG,
-                  String.format("任务【%s】分块文件合并失败", mConfig.TEMP_FILE.getName())));
+                  String.format("任务【%s】分块文件合并失败", getConfig().TEMP_FILE.getName())));
               return;
             }
           }
-          STATE.TASK_RECORD.deleteData();
-          STATE.isRunning = false;
+          getState().TASK_RECORD.deleteData();
+          getState().isRunning = false;
           mListener.onComplete();
         }
-        if (STATE.isFail()) {
-          STATE.isRunning = false;
+        if (getState().isFail()) {
+          getState().isRunning = false;
           mListener.onFail(false,
               new TaskException(TAG,
-                  String.format("任务【%s】下载失败，filePath: %s, url: %s", mConfig.TEMP_FILE.getName(),
-                      mEntity.getDownloadPath(), mEntity.getUrl())));
+                  String.format("任务【%s】下载失败，filePath: %s, url: %s", getConfig().TEMP_FILE.getName(),
+                      getEntity().getDownloadPath(), getEntity().getUrl())));
         }
       } else {
         ALog.i(TAG, "任务下载完成");
-        STATE.isRunning = false;
+        getState().isRunning = false;
         mListener.onComplete();
       }
     } else {
-      STATE.FAIL_NUM++;
+      getState().FAIL_NUM++;
     }
   }
 
@@ -326,6 +328,6 @@ private void handleComplete() {
   }
 
   @Override protected DownloadConfig getTaskConfig() {
-    return mTaskWrapper.getConfig();
+    return getTaskWrapper().getConfig();
   }
 }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/SimpleDownloadUtil.java b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/SimpleDownloadUtil.java
index fd77ab50..e04f9f3b 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/downloader/SimpleDownloadUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/downloader/SimpleDownloadUtil.java
@@ -20,6 +20,7 @@
 import com.arialyy.aria.core.common.IUtil;
 import com.arialyy.aria.core.common.OnFileInfoCallback;
 import com.arialyy.aria.core.download.DTaskWrapper;
+import com.arialyy.aria.core.inf.AbsEntity;
 import com.arialyy.aria.core.inf.AbsTaskWrapper;
 import com.arialyy.aria.core.inf.IDownloadListener;
 import com.arialyy.aria.core.inf.IEntity;
@@ -131,7 +132,7 @@ private Runnable createInfoThread() {
             mDownloader.start();
           }
 
-          @Override public void onFail(String url, BaseException e, boolean needRetry) {
+          @Override public void onFail(AbsEntity entity, BaseException e, boolean needRetry) {
             failDownload(e, needRetry);
             mDownloader.closeTimer();
           }
@@ -143,7 +144,7 @@ private Runnable createInfoThread() {
             mDownloader.start();
           }
 
-          @Override public void onFail(String url, BaseException e, boolean needRetry) {
+          @Override public void onFail(AbsEntity entity, BaseException e, boolean needRetry) {
             failDownload(e, needRetry);
             mDownloader.closeTimer();
           }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/group/AbsGroupUtil.java b/Aria/src/main/java/com/arialyy/aria/core/download/group/AbsGroupUtil.java
index a5671f99..be585516 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/group/AbsGroupUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/group/AbsGroupUtil.java
@@ -18,6 +18,7 @@
 import android.os.Handler;
 import android.os.Looper;
 import com.arialyy.aria.core.common.IUtil;
+import com.arialyy.aria.core.common.http.HttpTaskDelegate;
 import com.arialyy.aria.core.config.Configuration;
 import com.arialyy.aria.core.download.DTaskWrapper;
 import com.arialyy.aria.core.download.DGTaskWrapper;
@@ -293,12 +294,31 @@ SubDownloadLoader createSubLoader(DTaskWrapper taskWrapper) {
 
   /**
    * 创建并启动子任务下载器
+   *
    * @param needGetFileInfo {@code true} 需要获取文件信息。{@code false} 不需要获取文件信息
    */
   SubDownloadLoader createSubLoader(DTaskWrapper taskWrapper, boolean needGetFileInfo) {
+    if (getTaskType() == HTTP_GROUP) {
+      cloneHeader(taskWrapper);
+    }
     SubDownloadLoader loader = new SubDownloadLoader(mScheduler, taskWrapper, needGetFileInfo);
     mExeLoader.put(loader.getKey(), loader);
     mSubQueue.startTask(loader);
     return loader;
   }
+
+  /**
+   * 子任务使用父包裹器的属性
+   */
+  private void cloneHeader(DTaskWrapper taskWrapper) {
+    HttpTaskDelegate groupDelegate = mGTWrapper.asHttp();
+    HttpTaskDelegate subDelegate = taskWrapper.asHttp();
+
+    // 设置属性
+    subDelegate.setFileLenAdapter(groupDelegate.getFileLenAdapter());
+    subDelegate.setRequestEnum(groupDelegate.getRequestEnum());
+    subDelegate.setHeaders(groupDelegate.getHeaders());
+    subDelegate.setProxy(groupDelegate.getProxy());
+    subDelegate.setParams(groupDelegate.getParams());
+  }
 }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/group/DownloadGroupUtil.java b/Aria/src/main/java/com/arialyy/aria/core/download/group/DownloadGroupUtil.java
index d9440d2e..4c68d4c9 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/group/DownloadGroupUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/group/DownloadGroupUtil.java
@@ -20,8 +20,11 @@
 import com.arialyy.aria.core.common.OnFileInfoCallback;
 import com.arialyy.aria.core.download.DGTaskWrapper;
 import com.arialyy.aria.core.download.DTaskWrapper;
+import com.arialyy.aria.core.download.DownloadEntity;
 import com.arialyy.aria.core.download.downloader.HttpFileInfoThread;
+import com.arialyy.aria.core.inf.AbsEntity;
 import com.arialyy.aria.core.inf.IEntity;
+import com.arialyy.aria.exception.AriaIOException;
 import com.arialyy.aria.exception.BaseException;
 import com.arialyy.aria.util.ALog;
 import java.util.concurrent.ExecutorService;
@@ -84,6 +87,7 @@ public DownloadGroupUtil(IDownloadGroupListener listener, DGTaskWrapper taskWrap
   private void getGroupSize() {
     new Thread(new Runnable() {
       int count;
+      int failCount;
 
       @Override public void run() {
         for (DTaskWrapper dTaskWrapper : mGTWrapper.getSubTaskWrapper()) {
@@ -91,13 +95,16 @@ private void getGroupSize() {
             @Override public void onComplete(String url, CompleteInfo info) {
               createSubLoader((DTaskWrapper) info.wrapper, false);
               count++;
-              checkGetSizeComplete(count);
+              checkGetSizeComplete(count, failCount);
             }
 
-            @Override public void onFail(String url, BaseException e, boolean needRetry) {
-              ALog.e(TAG, String.format("获取文件信息失败，url：%s", url));
+            @Override public void onFail(AbsEntity entity, BaseException e, boolean needRetry) {
+              ALog.e(TAG, String.format("获取文件信息失败，url：%s", ((DownloadEntity) entity).getUrl()));
               count++;
-              checkGetSizeComplete(count);
+              failCount++;
+              mListener.onSubFail((DownloadEntity) entity, new AriaIOException(TAG,
+                  String.format("子任务获取文件长度失败，url：%s", ((DownloadEntity) entity).getUrl())));
+              checkGetSizeComplete(count, failCount);
             }
           }));
         }
@@ -108,17 +115,20 @@ private void getGroupSize() {
   /**
    * 检查组合任务大小是否获取完成，获取完成后取消阻塞，并设置组合任务大小
    */
-  private void checkGetSizeComplete(int count) {
+  private void checkGetSizeComplete(int count, int failCount) {
     if (count == mGTWrapper.getSubTaskWrapper().size()) {
       long size = 0;
       for (DTaskWrapper wrapper : mGTWrapper.getSubTaskWrapper()) {
         size += wrapper.getEntity().getFileSize();
       }
       mGTWrapper.getEntity().setFileSize(size);
+      mGTWrapper.getEntity().update();
+    } else if (failCount == mGTWrapper.getSubTaskWrapper().size()) {
+      mListener.onFail(true, new AriaIOException(TAG, "获取子任务长度失败"));
+    }
 
-      synchronized (LOCK) {
-        LOCK.notify();
-      }
+    synchronized (LOCK) {
+      LOCK.notify();
     }
   }
 }
\ No newline at end of file
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/group/FtpDirDownloadUtil.java b/Aria/src/main/java/com/arialyy/aria/core/download/group/FtpDirDownloadUtil.java
index ecb73e44..bb800a35 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/group/FtpDirDownloadUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/group/FtpDirDownloadUtil.java
@@ -19,6 +19,7 @@
 import com.arialyy.aria.core.common.OnFileInfoCallback;
 import com.arialyy.aria.core.download.DGTaskWrapper;
 import com.arialyy.aria.core.download.DTaskWrapper;
+import com.arialyy.aria.core.inf.AbsEntity;
 import com.arialyy.aria.core.inf.IEntity;
 import com.arialyy.aria.exception.BaseException;
 
@@ -49,7 +50,7 @@ public FtpDirDownloadUtil(IDownloadGroupListener listener, DGTaskWrapper taskEnt
           }
         }
 
-        @Override public void onFail(String url, BaseException e, boolean needRetry) {
+        @Override public void onFail(AbsEntity entity, BaseException e, boolean needRetry) {
           mListener.onFail(needRetry, e);
         }
       }).start();
diff --git a/Aria/src/main/java/com/arialyy/aria/core/download/group/SubDownloadLoader.java b/Aria/src/main/java/com/arialyy/aria/core/download/group/SubDownloadLoader.java
index ca825f69..abdbe115 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/download/group/SubDownloadLoader.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/download/group/SubDownloadLoader.java
@@ -24,6 +24,7 @@
 import com.arialyy.aria.core.download.DownloadEntity;
 import com.arialyy.aria.core.download.downloader.Downloader;
 import com.arialyy.aria.core.download.downloader.HttpFileInfoThread;
+import com.arialyy.aria.core.inf.AbsEntity;
 import com.arialyy.aria.core.inf.AbsTaskWrapper;
 import com.arialyy.aria.core.scheduler.ISchedulers;
 import com.arialyy.aria.exception.BaseException;
@@ -104,7 +105,7 @@ void reStart() {
           mDownloader.start();
         }
 
-        @Override public void onFail(String url, BaseException e, boolean needRetry) {
+        @Override public void onFail(AbsEntity entity, BaseException e, boolean needRetry) {
           mSchedulers.obtainMessage(ISchedulers.FAIL, SubDownloadLoader.this);
         }
       })).start();
diff --git a/Aria/src/main/java/com/arialyy/aria/core/inf/AbsHttpFileLenAdapter.java b/Aria/src/main/java/com/arialyy/aria/core/inf/AbsHttpFileLenAdapter.java
new file mode 100644
index 00000000..035cd5a3
--- /dev/null
+++ b/Aria/src/main/java/com/arialyy/aria/core/inf/AbsHttpFileLenAdapter.java
@@ -0,0 +1,10 @@
+package com.arialyy.aria.core.inf;
+
+public abstract class AbsHttpFileLenAdapter implements IHttpFileLenAdapter {
+
+  @Override public Object clone() throws CloneNotSupportedException {
+    //AbsHttpFileLenAdapter newAdapter = super.clone();
+
+    return super.clone();
+  }
+}
diff --git a/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTarget.java b/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTarget.java
index 4493164e..f36cdeda 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTarget.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/inf/AbsTarget.java
@@ -1,348 +1,340 @@
-/*
- * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.arialyy.aria.core.inf;
-
-import android.support.annotation.CheckResult;
-import android.text.TextUtils;
-import com.arialyy.aria.core.AriaManager;
-import com.arialyy.aria.core.command.ICmd;
-import com.arialyy.aria.core.command.normal.CancelCmd;
-import com.arialyy.aria.core.command.normal.NormalCmdFactory;
-import com.arialyy.aria.core.common.TaskRecord;
-import com.arialyy.aria.core.download.DGTaskWrapper;
-import com.arialyy.aria.core.download.DownloadGroupEntity;
-import com.arialyy.aria.core.download.DTaskWrapper;
-import com.arialyy.aria.core.manager.TaskWrapperManager;
-import com.arialyy.aria.core.upload.UTaskWrapper;
-import com.arialyy.aria.orm.DbEntity;
-import com.arialyy.aria.util.ALog;
-import com.arialyy.aria.util.CommonUtil;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Created by AriaL on 2017/7/3.
- */
-public abstract class AbsTarget<TARGET extends AbsTarget> implements ITargetHandler {
-
-  protected String TAG;
-  private AbsEntity mEntity;
-  private AbsTaskWrapper mTaskWrapper;
-  private String mTargetName;
-
-  protected AbsTarget() {
-    TAG = CommonUtil.getClassName(this);
-  }
-
-  public void setTaskWrapper(AbsTaskWrapper wrapper) {
-    mTaskWrapper = wrapper;
-    mEntity = wrapper.getEntity();
-  }
-
-  /**
-   * 重置状态，将任务状态设置为未开始状态
-   * 注意：如果在后续方法调用链中没有调用 {@link #start()}、{@link #stop()}、{@link #cancel()}、{@link #resume()}
-   * 等操作任务的方法，那么你需要调用{@link #save()}才能将修改保存到数据库
-   */
-  @CheckResult(suggest = "after use #start()、#stop()、#cancel()、#resume()、#save()?")
-  public TARGET resetState() {
-    mTaskWrapper.getEntity().setState(IEntity.STATE_WAIT);
-    mTaskWrapper.setRefreshInfo(true);
-    return (TARGET) this;
-  }
-
-  /**
-   * 删除记录，如果任务正在执行，则会删除正在下载的任务
-   */
-  public void removeRecord() {
-    if (isRunning()) {
-      ALog.d("AbsTarget", "任务正在下载，即将删除任务");
-      cancel();
-    } else {
-      if (mEntity instanceof AbsNormalEntity) {
-        TaskRecord record =
-            DbEntity.findFirst(TaskRecord.class, "TaskRecord.filePath=?", mTaskWrapper.getKey());
-        if (record != null) {
-          CommonUtil.delTaskRecord(record, mTaskWrapper.isRemoveFile(), (AbsNormalEntity) mEntity);
-        } else {
-          mEntity.deleteData();
-        }
-      } else if (mEntity instanceof DownloadGroupEntity) {
-        CommonUtil.delGroupTaskRecord(mTaskWrapper.isRemoveFile(), ((DownloadGroupEntity) mEntity));
-      }
-      TaskWrapperManager.getInstance().removeTaskWrapper(mEntity.getKey());
-    }
-  }
-
-  public AbsEntity getEntity() {
-    return mEntity;
-  }
-
-  public String getTargetName() {
-    return mTargetName;
-  }
-
-  public void setTargetName(String mTargetName) {
-    this.mTargetName = mTargetName;
-  }
-
-  /**
-   * 获取任务实体
-   */
-  public AbsTaskWrapper getTaskWrapper() {
-    return mTaskWrapper;
-  }
-
-  /**
-   * 获取任务进度，如果任务存在，则返回当前进度
-   *
-   * @return 该任务进度
-   */
-  public long getCurrentProgress() {
-    return mEntity == null ? -1 : mEntity.getCurrentProgress();
-  }
-
-  /**
-   * 获取任务文件大小
-   *
-   * @return 文件大小
-   */
-  public long getFileSize() {
-    return mEntity == null ? 0 : mEntity.getFileSize();
-  }
-
-  /**
-   * 获取单位转换后的文件大小
-   *
-   * @return 文件大小{@code xxx mb}
-   */
-  public String getConvertFileSize() {
-    return mEntity == null ? "0b" : CommonUtil.formatFileSize(mEntity.getFileSize());
-  }
-
-  /**
-   * 设置扩展字段，用来保存你的其它数据，如果你的数据比较多，你可以把你的数据转换为JSON字符串，然后再存到Aria中
-   * 注意：如果在后续方法调用链中没有调用 {@link #start()}、{@link #stop()}、{@link #cancel()}、{@link #resume()}
-   * 等操作任务的方法，那么你需要调用{@link #save()}才能将修改保存到数据库
-   *
-   * @param str 扩展数据
-   */
-  @CheckResult(suggest = "after use #start()、#stop()、#cancel()、#resume()、#save()?")
-  public TARGET setExtendField(String str) {
-    if (TextUtils.isEmpty(str)) return (TARGET) this;
-    if (TextUtils.isEmpty(mEntity.getStr()) || !mEntity.getStr().equals(str)) {
-      mEntity.setStr(str);
-    } else {
-      ALog.e(TAG, "设置扩展字段失败，扩展字段为一致");
-    }
-
-    return (TARGET) this;
-  }
-
-  /**
-   * 获取存放的扩展字段
-   * 设置扩展字段{@link #setExtendField(String)}
-   */
-  public String getExtendField() {
-    return mEntity.getStr();
-  }
-
-  /**
-   * 获取任务状态
-   *
-   * @return {@link IEntity}
-   */
-  public int getTaskState() {
-    return mEntity.getState();
-  }
-
-  /**
-   * 获取任务进度百分比
-   *
-   * @return 返回任务进度
-   */
-  public int getPercent() {
-    if (mEntity == null) {
-      ALog.e("AbsTarget", "下载管理器中没有该任务");
-      return 0;
-    }
-    if (mEntity.getFileSize() != 0) {
-      return (int) (mEntity.getCurrentProgress() * 100 / mEntity.getFileSize());
-    }
-    return 0;
-  }
-
-  /**
-   * 检查实体是否合法，如果实体合法，将保存实体到数据库，或更新数据库中的实体对象
-   *
-   * @return {@code true} 合法
-   */
-  protected abstract boolean checkEntity();
-
-  protected int checkTaskType() {
-    int taskType = 0;
-    if (mTaskWrapper instanceof DTaskWrapper) {
-      taskType = ICmd.TASK_TYPE_DOWNLOAD;
-    } else if (mTaskWrapper instanceof DGTaskWrapper) {
-      taskType = ICmd.TASK_TYPE_DOWNLOAD_GROUP;
-    } else if (mTaskWrapper instanceof UTaskWrapper) {
-      taskType = ICmd.TASK_TYPE_UPLOAD;
-    }
-    return taskType;
-  }
-
-  /**
-   * 保存修改
-   */
-  @Override public void save() {
-    if (!checkEntity()) {
-      ALog.e(TAG, "保存修改失败");
-    } else {
-      ALog.i(TAG, "保存成功");
-    }
-  }
-
-  /**
-   * 任务是否在执行
-   *
-   * @return {@code true} 任务正在执行
-   */
-  public abstract boolean isRunning();
-
-  /**
-   * 任务是否存在
-   *
-   * @return {@code true} 任务存在
-   */
-  public abstract boolean taskExists();
-
-  /**
-   * 设置target类型
-   *
-   * @return {@link #HTTP}、{@link #FTP}、{@link #GROUP_HTTP}、{@link #GROUP_FTP_DIR}
-   */
-  public abstract int getTargetType();
-
-  /**
-   * 添加任务
-   */
-  @Override public void add() {
-    if (checkEntity()) {
-      AriaManager.getInstance(AriaManager.APP)
-          .setCmd(CommonUtil.createNormalCmd(getTaskWrapper(), NormalCmdFactory.TASK_CREATE,
-              checkTaskType()))
-          .exe();
-    }
-  }
-
-  /**
-   * 开始任务
-   */
-  @Override public void start() {
-    if (checkEntity()) {
-      AriaManager.getInstance(AriaManager.APP)
-          .setCmd(
-              CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_START,
-                  checkTaskType()))
-          .exe();
-    }
-  }
-
-  /**
-   * 停止任务
-   *
-   * @see #stop()
-   */
-  @Deprecated public void pause() {
-    if (checkEntity()) {
-      stop();
-    }
-  }
-
-  @Override public void stop() {
-    if (checkEntity()) {
-      AriaManager.getInstance(AriaManager.APP)
-          .setCmd(
-              CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_STOP, checkTaskType()))
-          .exe();
-    }
-  }
-
-  /**
-   * 恢复任务
-   */
-  @Override public void resume() {
-    if (checkEntity()) {
-      AriaManager.getInstance(AriaManager.APP)
-          .setCmd(
-              CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_START,
-                  checkTaskType()))
-          .exe();
-    }
-  }
-
-  /**
-   * 删除任务
-   */
-  @Override public void cancel() {
-    if (checkEntity()) {
-      AriaManager.getInstance(AriaManager.APP)
-          .setCmd(CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_CANCEL,
-              checkTaskType()))
-          .exe();
-    }
-  }
-
-  /**
-   * 任务重试
-   */
-  @Override public void reTry() {
-    if (checkEntity()) {
-      List<ICmd> cmds = new ArrayList<>();
-      int taskType = checkTaskType();
-      cmds.add(
-          CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_STOP, taskType));
-      cmds.add(CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_START, taskType));
-      AriaManager.getInstance(AriaManager.APP).setCmds(cmds).exe();
-    }
-  }
-
-  /**
-   * 删除任务
-   *
-   * @param removeFile {@code true} 不仅删除任务数据库记录，还会删除已经删除完成的文件
-   * {@code false}如果任务已经完成，只删除任务数据库记录，
-   */
-  @Override public void cancel(boolean removeFile) {
-    if (checkEntity()) {
-      CancelCmd cancelCmd =
-          (CancelCmd) CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_CANCEL,
-              checkTaskType());
-      cancelCmd.removeFile = removeFile;
-      AriaManager.getInstance(AriaManager.APP).setCmd(cancelCmd).exe();
-    }
-  }
-
-  /**
-   * 重新下载
-   */
-  @Override public void reStart() {
-    if (checkEntity()) {
-      cancel();
-      start();
-    }
-  }
-}
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.core.inf;
+
+import android.support.annotation.CheckResult;
+import android.text.TextUtils;
+import com.arialyy.aria.core.AriaManager;
+import com.arialyy.aria.core.command.ICmd;
+import com.arialyy.aria.core.command.normal.CancelCmd;
+import com.arialyy.aria.core.command.normal.NormalCmdFactory;
+import com.arialyy.aria.core.download.DGTaskWrapper;
+import com.arialyy.aria.core.download.DownloadGroupEntity;
+import com.arialyy.aria.core.download.DTaskWrapper;
+import com.arialyy.aria.core.manager.TaskWrapperManager;
+import com.arialyy.aria.core.upload.UTaskWrapper;
+import com.arialyy.aria.util.ALog;
+import com.arialyy.aria.util.CommonUtil;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by AriaL on 2017/7/3.
+ */
+public abstract class AbsTarget<TARGET extends AbsTarget> implements ITargetHandler {
+
+  protected String TAG;
+  private AbsEntity mEntity;
+  private AbsTaskWrapper mTaskWrapper;
+  private String mTargetName;
+
+  protected AbsTarget() {
+    TAG = CommonUtil.getClassName(this);
+  }
+
+  public void setTaskWrapper(AbsTaskWrapper wrapper) {
+    mTaskWrapper = wrapper;
+    mEntity = wrapper.getEntity();
+  }
+
+  /**
+   * 重置状态，将任务状态设置为未开始状态
+   * 注意：如果在后续方法调用链中没有调用 {@link #start()}、{@link #stop()}、{@link #cancel()}、{@link #resume()}
+   * 等操作任务的方法，那么你需要调用{@link #save()}才能将修改保存到数据库
+   */
+  @CheckResult(suggest = "after use #start()、#stop()、#cancel()、#resume()、#save()?")
+  public TARGET resetState() {
+    mTaskWrapper.getEntity().setState(IEntity.STATE_WAIT);
+    mTaskWrapper.setRefreshInfo(true);
+    return (TARGET) this;
+  }
+
+  /**
+   * 删除记录，如果任务正在执行，则会删除正在下载的任务
+   */
+  public void removeRecord() {
+    if (isRunning()) {
+      ALog.d("AbsTarget", "任务正在下载，即将删除任务");
+      cancel();
+    } else {
+      if (mEntity instanceof AbsNormalEntity) {
+        CommonUtil.delTaskRecord((AbsNormalEntity) mEntity, mTaskWrapper.isRemoveFile());
+      } else if (mEntity instanceof DownloadGroupEntity) {
+        CommonUtil.delGroupTaskRecord(((DownloadGroupEntity) mEntity), mTaskWrapper.isRemoveFile());
+      }
+      TaskWrapperManager.getInstance().removeTaskWrapper(mEntity.getKey());
+    }
+  }
+
+  public AbsEntity getEntity() {
+    return mEntity;
+  }
+
+  public String getTargetName() {
+    return mTargetName;
+  }
+
+  public void setTargetName(String mTargetName) {
+    this.mTargetName = mTargetName;
+  }
+
+  /**
+   * 获取任务实体
+   */
+  public AbsTaskWrapper getTaskWrapper() {
+    return mTaskWrapper;
+  }
+
+  /**
+   * 获取任务进度，如果任务存在，则返回当前进度
+   *
+   * @return 该任务进度
+   */
+  public long getCurrentProgress() {
+    return mEntity == null ? -1 : mEntity.getCurrentProgress();
+  }
+
+  /**
+   * 获取任务文件大小
+   *
+   * @return 文件大小
+   */
+  public long getFileSize() {
+    return mEntity == null ? 0 : mEntity.getFileSize();
+  }
+
+  /**
+   * 获取单位转换后的文件大小
+   *
+   * @return 文件大小{@code xxx mb}
+   */
+  public String getConvertFileSize() {
+    return mEntity == null ? "0b" : CommonUtil.formatFileSize(mEntity.getFileSize());
+  }
+
+  /**
+   * 设置扩展字段，用来保存你的其它数据，如果你的数据比较多，你可以把你的数据转换为JSON字符串，然后再存到Aria中
+   * 注意：如果在后续方法调用链中没有调用 {@link #start()}、{@link #stop()}、{@link #cancel()}、{@link #resume()}
+   * 等操作任务的方法，那么你需要调用{@link #save()}才能将修改保存到数据库
+   *
+   * @param str 扩展数据
+   */
+  @CheckResult(suggest = "after use #start()、#stop()、#cancel()、#resume()、#save()?")
+  public TARGET setExtendField(String str) {
+    if (TextUtils.isEmpty(str)) return (TARGET) this;
+    if (TextUtils.isEmpty(mEntity.getStr()) || !mEntity.getStr().equals(str)) {
+      mEntity.setStr(str);
+    } else {
+      ALog.e(TAG, "设置扩展字段失败，扩展字段为一致");
+    }
+
+    return (TARGET) this;
+  }
+
+  /**
+   * 获取存放的扩展字段
+   * 设置扩展字段{@link #setExtendField(String)}
+   */
+  public String getExtendField() {
+    return mEntity.getStr();
+  }
+
+  /**
+   * 获取任务状态
+   *
+   * @return {@link IEntity}
+   */
+  public int getTaskState() {
+    return mEntity.getState();
+  }
+
+  /**
+   * 获取任务进度百分比
+   *
+   * @return 返回任务进度
+   */
+  public int getPercent() {
+    if (mEntity == null) {
+      ALog.e("AbsTarget", "下载管理器中没有该任务");
+      return 0;
+    }
+    if (mEntity.getFileSize() != 0) {
+      return (int) (mEntity.getCurrentProgress() * 100 / mEntity.getFileSize());
+    }
+    return 0;
+  }
+
+  /**
+   * 检查实体是否合法，如果实体合法，将保存实体到数据库，或更新数据库中的实体对象
+   *
+   * @return {@code true} 合法
+   */
+  protected abstract boolean checkEntity();
+
+  protected int checkTaskType() {
+    int taskType = 0;
+    if (mTaskWrapper instanceof DTaskWrapper) {
+      taskType = ICmd.TASK_TYPE_DOWNLOAD;
+    } else if (mTaskWrapper instanceof DGTaskWrapper) {
+      taskType = ICmd.TASK_TYPE_DOWNLOAD_GROUP;
+    } else if (mTaskWrapper instanceof UTaskWrapper) {
+      taskType = ICmd.TASK_TYPE_UPLOAD;
+    }
+    return taskType;
+  }
+
+  /**
+   * 保存修改
+   */
+  @Override public void save() {
+    if (!checkEntity()) {
+      ALog.e(TAG, "保存修改失败");
+    } else {
+      ALog.i(TAG, "保存成功");
+    }
+  }
+
+  /**
+   * 任务是否在执行
+   *
+   * @return {@code true} 任务正在执行
+   */
+  public abstract boolean isRunning();
+
+  /**
+   * 任务是否存在
+   *
+   * @return {@code true} 任务存在
+   */
+  public abstract boolean taskExists();
+
+  /**
+   * 设置target类型
+   *
+   * @return {@link #HTTP}、{@link #FTP}、{@link #GROUP_HTTP}、{@link #GROUP_FTP_DIR}
+   */
+  public abstract int getTargetType();
+
+  /**
+   * 添加任务
+   */
+  @Override public void add() {
+    if (checkEntity()) {
+      AriaManager.getInstance(AriaManager.APP)
+          .setCmd(CommonUtil.createNormalCmd(getTaskWrapper(), NormalCmdFactory.TASK_CREATE,
+              checkTaskType()))
+          .exe();
+    }
+  }
+
+  /**
+   * 开始任务
+   */
+  @Override public void start() {
+    if (checkEntity()) {
+      AriaManager.getInstance(AriaManager.APP)
+          .setCmd(
+              CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_START,
+                  checkTaskType()))
+          .exe();
+    }
+  }
+
+  /**
+   * 停止任务
+   *
+   * @see #stop()
+   */
+  @Deprecated public void pause() {
+    if (checkEntity()) {
+      stop();
+    }
+  }
+
+  @Override public void stop() {
+    if (checkEntity()) {
+      AriaManager.getInstance(AriaManager.APP)
+          .setCmd(
+              CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_STOP, checkTaskType()))
+          .exe();
+    }
+  }
+
+  /**
+   * 恢复任务
+   */
+  @Override public void resume() {
+    if (checkEntity()) {
+      AriaManager.getInstance(AriaManager.APP)
+          .setCmd(
+              CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_START,
+                  checkTaskType()))
+          .exe();
+    }
+  }
+
+  /**
+   * 删除任务
+   */
+  @Override public void cancel() {
+    if (checkEntity()) {
+      AriaManager.getInstance(AriaManager.APP)
+          .setCmd(CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_CANCEL,
+              checkTaskType()))
+          .exe();
+    }
+  }
+
+  /**
+   * 任务重试
+   */
+  @Override public void reTry() {
+    if (checkEntity()) {
+      List<ICmd> cmds = new ArrayList<>();
+      int taskType = checkTaskType();
+      cmds.add(
+          CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_STOP, taskType));
+      cmds.add(CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_START, taskType));
+      AriaManager.getInstance(AriaManager.APP).setCmds(cmds).exe();
+    }
+  }
+
+  /**
+   * 删除任务
+   *
+   * @param removeFile {@code true} 不仅删除任务数据库记录，还会删除已经删除完成的文件
+   * {@code false}如果任务已经完成，只删除任务数据库记录，
+   */
+  @Override public void cancel(boolean removeFile) {
+    if (checkEntity()) {
+      CancelCmd cancelCmd =
+          (CancelCmd) CommonUtil.createNormalCmd(mTaskWrapper, NormalCmdFactory.TASK_CANCEL,
+              checkTaskType());
+      cancelCmd.removeFile = removeFile;
+      AriaManager.getInstance(AriaManager.APP).setCmd(cancelCmd).exe();
+    }
+  }
+
+  /**
+   * 重新下载
+   */
+  @Override public void reStart() {
+    if (checkEntity()) {
+      cancel();
+      start();
+    }
+  }
+}
diff --git a/Aria/src/main/java/com/arialyy/aria/core/inf/IHttpFileLenAdapter.java b/Aria/src/main/java/com/arialyy/aria/core/inf/IHttpFileLenAdapter.java
new file mode 100644
index 00000000..55b8c507
--- /dev/null
+++ b/Aria/src/main/java/com/arialyy/aria/core/inf/IHttpFileLenAdapter.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.core.inf;
+
+import java.io.Serializable;
+import java.net.URLConnection;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Http文件长度适配器
+ */
+public interface IHttpFileLenAdapter extends Serializable {
+  long serialVersionUID = 1L;
+
+  /**
+   * 同伙header中的数据获取文件长度
+   *
+   * @param headers header参数{@link URLConnection#getHeaderFields()}
+   * @return 文件长度
+   */
+  long handleFileLen(Map<String, List<String>> headers);
+}
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/FtpThreadTask.java b/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/FtpThreadTask.java
index ed4e8ca2..5e6ae55d 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/FtpThreadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/FtpThreadTask.java
@@ -1,194 +1,194 @@
-/*
- * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.arialyy.aria.core.upload.uploader;
-
-import aria.apache.commons.net.ftp.FTPClient;
-import aria.apache.commons.net.ftp.FTPReply;
-import aria.apache.commons.net.ftp.OnFtpInputStreamListener;
-import com.arialyy.aria.core.common.StateConstance;
-import com.arialyy.aria.core.common.SubThreadConfig;
-import com.arialyy.aria.core.common.ftp.AbsFtpThreadTask;
-import com.arialyy.aria.core.config.BaseTaskConfig;
-import com.arialyy.aria.core.config.DownloadConfig;
-import com.arialyy.aria.core.config.UploadConfig;
-import com.arialyy.aria.core.inf.IEventListener;
-import com.arialyy.aria.core.upload.UploadEntity;
-import com.arialyy.aria.core.upload.UTaskWrapper;
-import com.arialyy.aria.exception.AriaIOException;
-import com.arialyy.aria.exception.TaskException;
-import com.arialyy.aria.util.ALog;
-import com.arialyy.aria.util.BufferedRandomAccessFile;
-import java.io.IOException;
-import java.io.UnsupportedEncodingException;
-
-/**
- * Created by Aria.Lao on 2017/7/28. FTP 单线程上传任务，需要FTP 服务器给用户打开append和write的权限
- */
-class FtpThreadTask extends AbsFtpThreadTask<UploadEntity, UTaskWrapper> {
-  private final String TAG = "FtpThreadTask";
-  private String dir, remotePath;
-
-  FtpThreadTask(StateConstance constance, IEventListener listener,
-      SubThreadConfig<UTaskWrapper> info) {
-    super(constance, listener, info);
-  }
-
-  @Override public int getMaxSpeed() {
-    return getTaskConfig().getMaxSpeed();
-  }
-
-  @Override protected UploadConfig getTaskConfig() {
-    return mTaskWrapper.getConfig();
-  }
-
-  @Override public FtpThreadTask call() throws Exception {
-    super.call();
-    //当前子线程的下载位置
-    mChildCurrentLocation = mConfig.START_LOCATION;
-    FTPClient client = null;
-    BufferedRandomAccessFile file = null;
-    try {
-      ALog.d(TAG,
-          String.format("任务【%s】线程__%s__开始上传【开始位置 : %s，结束位置：%s】", mConfig.TEMP_FILE.getName(),
-              mConfig.THREAD_ID, mConfig.START_LOCATION, mConfig.END_LOCATION));
-      client = createClient();
-      if (client == null) {
-        return this;
-      }
-      initPath();
-      client.makeDirectory(dir);
-      client.changeWorkingDirectory(dir);
-      client.setRestartOffset(mConfig.START_LOCATION);
-      int reply = client.getReplyCode();
-      if (!FTPReply.isPositivePreliminary(reply) && reply != FTPReply.FILE_ACTION_OK) {
-        fail(mChildCurrentLocation,
-            new AriaIOException(TAG,
-                String.format("文件上传错误，错误码为：%s, msg：%s, filePath: %s", reply,
-                    client.getReplyString(), mEntity.getFilePath())));
-        client.disconnect();
-        return this;
-      }
-
-      file = new BufferedRandomAccessFile(mConfig.TEMP_FILE, "rwd", getTaskConfig().getBuffSize());
-      if (mConfig.START_LOCATION != 0) {
-        //file.skipBytes((int) mConfig.START_LOCATION);
-        file.seek(mConfig.START_LOCATION);
-      }
-      boolean complete = upload(client, file);
-      if (!complete || isBreak()) {
-        return this;
-      }
-      ALog.i(TAG,
-          String.format("任务【%s】线程__%s__上传完毕", mConfig.TEMP_FILE.getName(), mConfig.THREAD_ID));
-      writeConfig(true, mConfig.END_LOCATION);
-      STATE.COMPLETE_THREAD_NUM++;
-      if (STATE.isComplete()) {
-        STATE.TASK_RECORD.deleteData();
-        STATE.isRunning = false;
-        mListener.onComplete();
-      }
-      if (STATE.isFail()) {
-        STATE.isRunning = false;
-        mListener.onFail(false, new TaskException(TAG,
-            String.format("上传失败，filePath: %s, uploadUrl: %s", mEntity.getFilePath(), mConfig.URL)));
-      }
-    } catch (IOException e) {
-      fail(mChildCurrentLocation, new AriaIOException(TAG,
-          String.format("上传失败，filePath: %s, uploadUrl: %s", mEntity.getFilePath(), mConfig.URL)));
-    } catch (Exception e) {
-      fail(mChildCurrentLocation, new AriaIOException(TAG, null, e));
-    } finally {
-      try {
-        if (file != null) {
-          file.close();
-        }
-        if (client != null && client.isConnected()) {
-          client.disconnect();
-        }
-      } catch (IOException e) {
-        e.printStackTrace();
-      }
-    }
-    return this;
-  }
-
-  private void initPath() throws UnsupportedEncodingException {
-    dir = new String(mTaskWrapper.asFtp().getUrlEntity().remotePath.getBytes(charSet),
-        SERVER_CHARSET);
-    remotePath = new String(String.format("%s/%s", mTaskWrapper.asFtp().getUrlEntity().remotePath,
-        mEntity.getFileName()).getBytes(charSet), SERVER_CHARSET);
-  }
-
-  /**
-   * 上传
-   *
-   * @return {@code true}上传成功、{@code false} 上传失败
-   */
-  private boolean upload(final FTPClient client, final BufferedRandomAccessFile bis)
-      throws IOException {
-
-    try {
-      ALog.d(TAG, String.format("remotePath: %s", remotePath));
-      client.storeFile(remotePath, new FtpFISAdapter(bis), new OnFtpInputStreamListener() {
-        boolean isStoped = false;
-
-        @Override public void onFtpInputStream(FTPClient client, long totalBytesTransferred,
-            int bytesTransferred, long streamSize) {
-          try {
-            if (isBreak() && !isStoped) {
-              isStoped = true;
-              client.abor();
-            }
-            if (mSpeedBandUtil != null) {
-              mSpeedBandUtil.limitNextBytes(bytesTransferred);
-            }
-            progress(bytesTransferred);
-          } catch (IOException e) {
-            e.printStackTrace();
-          }
-        }
-      });
-    } catch (IOException e) {
-      String msg = String.format("文件上传错误，错误码为：%s, msg：%s, filePath: %s", client.getReplyCode(),
-          client.getReplyString(), mEntity.getFilePath());
-      if (client.isConnected()) {
-        client.disconnect();
-      }
-      if (e.getMessage().contains("AriaIOException caught while copying")) {
-        e.printStackTrace();
-      } else {
-        fail(mChildCurrentLocation,
-            new AriaIOException(TAG, msg, e));
-      }
-      return false;
-    }
-
-    int reply = client.getReplyCode();
-    if (!FTPReply.isPositiveCompletion(reply)) {
-      if (reply != FTPReply.TRANSFER_ABORTED) {
-        fail(mChildCurrentLocation,
-            new AriaIOException(TAG,
-                String.format("文件上传错误，错误码为：%s, msg：%s, filePath: %s", reply,
-                    client.getReplyString(), mEntity.getFilePath())));
-      }
-      if (client.isConnected()) {
-        client.disconnect();
-      }
-      return false;
-    }
-    return true;
-  }
-}
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.arialyy.aria.core.upload.uploader;
+
+import aria.apache.commons.net.ftp.FTPClient;
+import aria.apache.commons.net.ftp.FTPReply;
+import aria.apache.commons.net.ftp.OnFtpInputStreamListener;
+import com.arialyy.aria.core.common.StateConstance;
+import com.arialyy.aria.core.common.SubThreadConfig;
+import com.arialyy.aria.core.common.ftp.AbsFtpThreadTask;
+import com.arialyy.aria.core.config.BaseTaskConfig;
+import com.arialyy.aria.core.config.DownloadConfig;
+import com.arialyy.aria.core.config.UploadConfig;
+import com.arialyy.aria.core.inf.IEventListener;
+import com.arialyy.aria.core.upload.UploadEntity;
+import com.arialyy.aria.core.upload.UTaskWrapper;
+import com.arialyy.aria.exception.AriaIOException;
+import com.arialyy.aria.exception.TaskException;
+import com.arialyy.aria.util.ALog;
+import com.arialyy.aria.util.BufferedRandomAccessFile;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+
+/**
+ * Created by Aria.Lao on 2017/7/28. FTP 单线程上传任务，需要FTP 服务器给用户打开append和write的权限
+ */
+class FtpThreadTask extends AbsFtpThreadTask<UploadEntity, UTaskWrapper> {
+  private final String TAG = "FtpThreadTask";
+  private String dir, remotePath;
+
+  FtpThreadTask(StateConstance constance, IEventListener listener,
+      SubThreadConfig<UTaskWrapper> info) {
+    super(constance, listener, info);
+  }
+
+  @Override public int getMaxSpeed() {
+    return getTaskConfig().getMaxSpeed();
+  }
+
+  @Override protected UploadConfig getTaskConfig() {
+    return getTaskWrapper().getConfig();
+  }
+
+  @Override public FtpThreadTask call() throws Exception {
+    super.call();
+    //当前子线程的下载位置
+    mChildCurrentLocation = getConfig().START_LOCATION;
+    FTPClient client = null;
+    BufferedRandomAccessFile file = null;
+    try {
+      ALog.d(TAG,
+          String.format("任务【%s】线程__%s__开始上传【开始位置 : %s，结束位置：%s】", getConfig().TEMP_FILE.getName(),
+              getConfig().THREAD_ID, getConfig().START_LOCATION, getConfig().END_LOCATION));
+      client = createClient();
+      if (client == null) {
+        return this;
+      }
+      initPath();
+      client.makeDirectory(dir);
+      client.changeWorkingDirectory(dir);
+      client.setRestartOffset(getConfig().START_LOCATION);
+      int reply = client.getReplyCode();
+      if (!FTPReply.isPositivePreliminary(reply) && reply != FTPReply.FILE_ACTION_OK) {
+        fail(mChildCurrentLocation,
+            new AriaIOException(TAG,
+                String.format("文件上传错误，错误码为：%s, msg：%s, filePath: %s", reply,
+                    client.getReplyString(), getEntity().getFilePath())));
+        client.disconnect();
+        return this;
+      }
+
+      file = new BufferedRandomAccessFile(getConfig().TEMP_FILE, "rwd", getTaskConfig().getBuffSize());
+      if (getConfig().START_LOCATION != 0) {
+        //file.skipBytes((int) getConfig().START_LOCATION);
+        file.seek(getConfig().START_LOCATION);
+      }
+      boolean complete = upload(client, file);
+      if (!complete || isBreak()) {
+        return this;
+      }
+      ALog.i(TAG,
+          String.format("任务【%s】线程__%s__上传完毕", getConfig().TEMP_FILE.getName(), getConfig().THREAD_ID));
+      writeConfig(true, getConfig().END_LOCATION);
+      getState().COMPLETE_THREAD_NUM++;
+      if (getState().isComplete()) {
+        getState().TASK_RECORD.deleteData();
+        getState().isRunning = false;
+        mListener.onComplete();
+      }
+      if (getState().isFail()) {
+        getState().isRunning = false;
+        mListener.onFail(false, new TaskException(TAG,
+            String.format("上传失败，filePath: %s, uploadUrl: %s", getEntity().getFilePath(), getConfig().URL)));
+      }
+    } catch (IOException e) {
+      fail(mChildCurrentLocation, new AriaIOException(TAG,
+          String.format("上传失败，filePath: %s, uploadUrl: %s", getEntity().getFilePath(), getConfig().URL)));
+    } catch (Exception e) {
+      fail(mChildCurrentLocation, new AriaIOException(TAG, null, e));
+    } finally {
+      try {
+        if (file != null) {
+          file.close();
+        }
+        if (client != null && client.isConnected()) {
+          client.disconnect();
+        }
+      } catch (IOException e) {
+        e.printStackTrace();
+      }
+    }
+    return this;
+  }
+
+  private void initPath() throws UnsupportedEncodingException {
+    dir = new String(getTaskWrapper().asFtp().getUrlEntity().remotePath.getBytes(charSet),
+        SERVER_CHARSET);
+    remotePath = new String(String.format("%s/%s", getTaskWrapper().asFtp().getUrlEntity().remotePath,
+        getEntity().getFileName()).getBytes(charSet), SERVER_CHARSET);
+  }
+
+  /**
+   * 上传
+   *
+   * @return {@code true}上传成功、{@code false} 上传失败
+   */
+  private boolean upload(final FTPClient client, final BufferedRandomAccessFile bis)
+      throws IOException {
+
+    try {
+      ALog.d(TAG, String.format("remotePath: %s", remotePath));
+      client.storeFile(remotePath, new FtpFISAdapter(bis), new OnFtpInputStreamListener() {
+        boolean isStoped = false;
+
+        @Override public void onFtpInputStream(FTPClient client, long totalBytesTransferred,
+            int bytesTransferred, long streamSize) {
+          try {
+            if (isBreak() && !isStoped) {
+              isStoped = true;
+              client.abor();
+            }
+            if (mSpeedBandUtil != null) {
+              mSpeedBandUtil.limitNextBytes(bytesTransferred);
+            }
+            progress(bytesTransferred);
+          } catch (IOException e) {
+            e.printStackTrace();
+          }
+        }
+      });
+    } catch (IOException e) {
+      String msg = String.format("文件上传错误，错误码为：%s, msg：%s, filePath: %s", client.getReplyCode(),
+          client.getReplyString(), getEntity().getFilePath());
+      if (client.isConnected()) {
+        client.disconnect();
+      }
+      if (e.getMessage().contains("AriaIOException caught while copying")) {
+        e.printStackTrace();
+      } else {
+        fail(mChildCurrentLocation,
+            new AriaIOException(TAG, msg, e));
+      }
+      return false;
+    }
+
+    int reply = client.getReplyCode();
+    if (!FTPReply.isPositiveCompletion(reply)) {
+      if (reply != FTPReply.TRANSFER_ABORTED) {
+        fail(mChildCurrentLocation,
+            new AriaIOException(TAG,
+                String.format("文件上传错误，错误码为：%s, msg：%s, filePath: %s", reply,
+                    client.getReplyString(), getEntity().getFilePath())));
+      }
+      if (client.isConnected()) {
+        client.disconnect();
+      }
+      return false;
+    }
+    return true;
+  }
+}
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/HttpThreadTask.java b/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/HttpThreadTask.java
index 19846126..cfb9b99f 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/HttpThreadTask.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/HttpThreadTask.java
@@ -59,18 +59,18 @@ class HttpThreadTask extends AbsThreadTask<UploadEntity, UTaskWrapper> {
 
   @Override public HttpThreadTask call() throws Exception {
     super.call();
-    File uploadFile = new File(mEntity.getFilePath());
+    File uploadFile = new File(getEntity().getFilePath());
     if (!uploadFile.exists()) {
       fail(new TaskException(TAG,
-          String.format("上传失败，文件不存在；filePath: %s, url: %s", mEntity.getFilePath(),
-              mEntity.getUrl())));
+          String.format("上传失败，文件不存在；filePath: %s, url: %s", getEntity().getFilePath(),
+              getEntity().getUrl())));
       return this;
     }
     mListener.onPre();
     URL url;
     try {
-      url = new URL(mEntity.getUrl());
-      HttpTaskDelegate taskDelegate = mTaskWrapper.asHttp();
+      url = new URL(getEntity().getUrl());
+      HttpTaskDelegate taskDelegate = getTaskWrapper().asHttp();
       mHttpConn = (HttpURLConnection) url.openConnection();
       mHttpConn.setRequestMethod(taskDelegate.getRequestEnum().name);
       mHttpConn.setUseCaches(false);
@@ -100,12 +100,13 @@ class HttpThreadTask extends AbsThreadTask<UploadEntity, UTaskWrapper> {
         addFormField(writer, key, taskDelegate.getFormFields().get(key));
       }
       uploadFile(writer, taskDelegate.getAttachment(), uploadFile);
-      mTaskWrapper.getEntity().setResponseStr(finish(writer));
+      getEntity().setResponseStr(finish(writer));
       mListener.onComplete();
     } catch (Exception e) {
       e.printStackTrace();
       fail(new TaskException(TAG,
-          String.format("上传失败，filePath: %s, url: %s", mEntity.getFilePath(), mEntity.getUrl()), e));
+          String.format("上传失败，filePath: %s, url: %s", getEntity().getFilePath(),
+              getEntity().getUrl()), e));
     }
     return this;
   }
@@ -113,7 +114,7 @@ class HttpThreadTask extends AbsThreadTask<UploadEntity, UTaskWrapper> {
   private void fail(BaseException e1) {
     try {
       mListener.onFail(true, e1);
-      STATE.isRunning = false;
+      getState().isRunning = false;
       if (mOutputStream != null) {
         mOutputStream.close();
       }
@@ -132,7 +133,7 @@ private void addFormField(PrintWriter writer, String name, String value) {
         .append("\"")
         .append(LINE_END);
     writer.append("Content-Type: text/plain; charset=")
-        .append(mTaskWrapper.asHttp().getCharSet())
+        .append(getTaskWrapper().asHttp().getCharSet())
         .append(LINE_END);
     writer.append(LINE_END);
     writer.append(value).append(LINE_END);
@@ -151,11 +152,11 @@ private void uploadFile(PrintWriter writer, String attachment, File uploadFile)
     writer.append("Content-Disposition: form-data; name=\"")
         .append(attachment)
         .append("\"; filename=\"")
-        .append(mTaskWrapper.getEntity().getFileName())
+        .append(getEntity().getFileName())
         .append("\"")
         .append(LINE_END);
     writer.append("Content-Type: ")
-        .append(URLConnection.guessContentTypeFromName(mTaskWrapper.getEntity().getFileName()))
+        .append(URLConnection.guessContentTypeFromName(getEntity().getFileName()))
         .append(LINE_END);
     writer.append("Content-Transfer-Encoding: binary").append(LINE_END);
     writer.append(LINE_END);
@@ -165,9 +166,9 @@ private void uploadFile(PrintWriter writer, String attachment, File uploadFile)
     byte[] buffer = new byte[4096];
     int bytesRead;
     while ((bytesRead = inputStream.read(buffer)) != -1) {
-      STATE.CURRENT_LOCATION += bytesRead;
+      getState().CURRENT_LOCATION += bytesRead;
       mOutputStream.write(buffer, 0, bytesRead);
-      if (STATE.isCancel) {
+      if (getState().isCancel) {
         break;
       }
       if (mSpeedBandUtil != null) {
@@ -180,11 +181,11 @@ private void uploadFile(PrintWriter writer, String attachment, File uploadFile)
     inputStream.close();
     writer.append(LINE_END);
     writer.flush();
-    if (STATE.isCancel) {
-      STATE.isRunning = false;
+    if (getState().isCancel) {
+      getState().isRunning = false;
       return;
     }
-    STATE.isRunning = false;
+    getState().isRunning = false;
   }
 
   /**
@@ -224,6 +225,6 @@ private String finish(PrintWriter writer) throws IOException {
   }
 
   @Override protected UploadConfig getTaskConfig() {
-    return mTaskWrapper.getConfig();
+    return getTaskWrapper().getConfig();
   }
 }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/SimpleUploadUtil.java b/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/SimpleUploadUtil.java
index fe185f48..e7fc8162 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/SimpleUploadUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/upload/uploader/SimpleUploadUtil.java
@@ -18,6 +18,7 @@
 import com.arialyy.aria.core.common.CompleteInfo;
 import com.arialyy.aria.core.common.IUtil;
 import com.arialyy.aria.core.common.OnFileInfoCallback;
+import com.arialyy.aria.core.inf.AbsEntity;
 import com.arialyy.aria.core.inf.AbsTaskWrapper;
 import com.arialyy.aria.core.inf.IUploadListener;
 import com.arialyy.aria.core.upload.UTaskWrapper;
@@ -61,7 +62,7 @@ public SimpleUploadUtil(UTaskWrapper taskWrapper, IUploadListener listener) {
             }
           }
 
-          @Override public void onFail(String url, BaseException e, boolean needRetry) {
+          @Override public void onFail(AbsEntity entity, BaseException e, boolean needRetry) {
             mListener.onFail(needRetry, e);
           }
         }).start();
diff --git a/Aria/src/main/java/com/arialyy/aria/util/CommonUtil.java b/Aria/src/main/java/com/arialyy/aria/util/CommonUtil.java
index d19c0908..c2f5cd33 100644
--- a/Aria/src/main/java/com/arialyy/aria/util/CommonUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/util/CommonUtil.java
@@ -1,1233 +1,1219 @@
-/*
- * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.arialyy.aria.util;
-
-import android.content.Context;
-import android.content.Intent;
-import android.content.SharedPreferences;
-import android.net.Uri;
-import android.os.Environment;
-import android.os.StatFs;
-import android.text.TextUtils;
-import android.util.Base64;
-import com.arialyy.aria.core.AriaManager;
-import com.arialyy.aria.core.FtpUrlEntity;
-import com.arialyy.aria.core.command.ICmd;
-import com.arialyy.aria.core.command.group.AbsGroupCmd;
-import com.arialyy.aria.core.command.group.GroupCmdFactory;
-import com.arialyy.aria.core.command.normal.AbsNormalCmd;
-import com.arialyy.aria.core.command.normal.NormalCmdFactory;
-import com.arialyy.aria.core.common.AbsFileer;
-import com.arialyy.aria.core.common.TaskRecord;
-import com.arialyy.aria.core.common.ThreadRecord;
-import com.arialyy.aria.core.download.DownloadEntity;
-import com.arialyy.aria.core.download.DownloadGroupEntity;
-import com.arialyy.aria.core.inf.AbsGroupTaskWrapper;
-import com.arialyy.aria.core.inf.AbsNormalEntity;
-import com.arialyy.aria.core.inf.AbsTaskWrapper;
-import com.arialyy.aria.core.upload.UploadEntity;
-import com.arialyy.aria.orm.DbEntity;
-import dalvik.system.DexFile;
-import java.io.File;
-import java.io.FileFilter;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.ObjectInputStream;
-import java.io.ObjectOutputStream;
-import java.io.Serializable;
-import java.io.UnsupportedEncodingException;
-import java.lang.reflect.Field;
-import java.lang.reflect.ParameterizedType;
-import java.lang.reflect.Type;
-import java.math.BigDecimal;
-import java.math.BigInteger;
-import java.net.URLEncoder;
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Enumeration;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Properties;
-import java.util.Set;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-/**
- * Created by lyy on 2016/1/22. 通用工具
- */
-public class CommonUtil {
-  private static final String TAG = "CommonUtil";
-
-  /**
-   * 检查分块任务是否存在
-   *
-   * @param filePath 文件保存路径
-   * @return {@code true} 分块文件存在
-   */
-  public static boolean blockTaskExists(String filePath) {
-    return new File(String.format(AbsFileer.SUB_PATH, filePath, 0)).exists();
-  }
-
-  /**
-   * 删除文件
-   *
-   * @param path 文件路径
-   * @return {@code true}删除成功、{@code false}删除失败
-   */
-  public static boolean deleteFile(String path) {
-    if (TextUtils.isEmpty(path)) {
-      ALog.e(TAG, "删除文件失败，路径为空");
-      return false;
-    }
-    File file = new File(path);
-    if (file.exists()) {
-      final File to = new File(file.getAbsolutePath() + System.currentTimeMillis());
-      if (file.renameTo(to)) {
-        return to.delete();
-      } else {
-        return file.delete();
-      }
-    }
-    return false;
-  }
-
-  /**
-   * 将对象写入文件
-   *
-   * @param filePath 文件路径
-   * @param data data数据必须实现{@link Serializable}接口
-   */
-  public static void writeObjToFile(String filePath, Object data) {
-    if (!(data instanceof Serializable)) {
-      ALog.e(TAG, "对象写入文件失败，data数据必须实现Serializable接口");
-      return;
-    }
-    FileOutputStream ops = null;
-    try {
-      if (!createFile(filePath)) {
-        return;
-      }
-      ops = new FileOutputStream(filePath);
-      ObjectOutputStream oops = new ObjectOutputStream(ops);
-      oops.writeObject(data);
-    } catch (FileNotFoundException e) {
-      e.printStackTrace();
-    } catch (IOException e) {
-      e.printStackTrace();
-    } finally {
-      if (ops != null) {
-        try {
-          ops.close();
-        } catch (IOException e) {
-          e.printStackTrace();
-        }
-      }
-    }
-  }
-
-  /**
-   * 从文件中读取对象
-   *
-   * @param filePath 文件路径
-   * @return 如果读取成功，返回相应的Obj对象，读取失败，返回null
-   */
-  public static Object readObjFromFile(String filePath) {
-    if (TextUtils.isEmpty(filePath)) {
-      ALog.e(TAG, "文件路径为空");
-      return null;
-    }
-    File file = new File(filePath);
-    if (!file.exists()) {
-      ALog.e(TAG, String.format("文件【%s】不存在", filePath));
-      return null;
-    }
-    FileInputStream fis = null;
-    try {
-      fis = new FileInputStream(filePath);
-      ObjectInputStream oois = new ObjectInputStream(fis);
-      return oois.readObject();
-    } catch (FileNotFoundException e) {
-      e.printStackTrace();
-    } catch (IOException e) {
-      e.printStackTrace();
-    } catch (ClassNotFoundException e) {
-      e.printStackTrace();
-    } finally {
-      if (fis != null) {
-        try {
-          fis.close();
-        } catch (IOException e) {
-          e.printStackTrace();
-        }
-      }
-    }
-    return null;
-  }
-
-  /**
-   * 获取分块文件的快大小
-   *
-   * @param fileLen 文件总长度
-   * @param blockId 分块id
-   * @param blockNum 分块数量
-   * @return 分块长度
-   */
-  public static long getBlockLen(long fileLen, int blockId, int blockNum) {
-    final long averageLen = fileLen / blockNum;
-    return blockId == blockNum - 1 ? (fileLen - blockId * averageLen) : averageLen;
-  }
-
-  /**
-   * 检查SD内存空间是否充足
-   *
-   * @param filePath 文件保存路径
-   * @param fileSize 文件大小
-   * @return {@code false} 内存空间不足，{@code true}内存空间足够
-   */
-  public static boolean checkSDMemorySpace(String filePath, long fileSize) {
-    List<String> dirs = FileUtil.getSDPathList(AriaManager.APP);
-    if (dirs == null || dirs.isEmpty()) {
-      return true;
-    }
-    for (String path : dirs) {
-      if (filePath.contains(path)) {
-        if (fileSize > 0 && fileSize > getAvailableExternalMemorySize(path)) {
-          return false;
-        }
-      }
-    }
-    return true;
-  }
-
-  /**
-   * sdcard 可用大小
-   *
-   * @param sdcardPath sdcard 根路径
-   * @return 单位为：byte
-   */
-  public static long getAvailableExternalMemorySize(String sdcardPath) {
-    StatFs stat = new StatFs(sdcardPath);
-    long blockSize = stat.getBlockSize();
-    long availableBlocks = stat.getAvailableBlocks();
-    return availableBlocks * blockSize;
-  }
-
-  /**
-   * sdcard 总大小
-   *
-   * @param sdcardPath sdcard 根路径
-   * @return 单位为：byte
-   */
-  public static long getTotalExternalMemorySize(String sdcardPath) {
-    StatFs stat = new StatFs(sdcardPath);
-    long blockSize = stat.getBlockSize();
-    long totalBlocks = stat.getBlockCount();
-    return totalBlocks * blockSize;
-  }
-
-  /**
-   * 获取某包下所有类
-   *
-   * @param className 过滤的类名
-   * @return 类的完整名称
-   */
-  public static List<String> getPkgClassNames(Context context, String className) {
-    List<String> classNameList = new ArrayList<>();
-    String pPath = context.getPackageCodePath();
-    File dir = new File(pPath).getParentFile();
-    String[] paths = dir.list();
-    if (paths == null) {
-      classNameList.addAll(getPkgClassName(pPath, className));
-    } else {
-      String dPath = dir.getPath();
-      for (String path : dir.list()) {
-        String fPath = dPath + "/" + path;
-        if (!fPath.endsWith(".apk")) {
-          continue;
-        }
-        classNameList.addAll(getPkgClassName(fPath, className));
-      }
-    }
-    return classNameList;
-  }
-
-  /**
-   * 获取指定包名下的所有类
-   *
-   * @param path dex路径
-   * @param filterClass 需要过滤的类
-   */
-  public static List<String> getPkgClassName(String path, String filterClass) {
-    List<String> list = new ArrayList<>();
-    try {
-      File file = new File(path);
-      if (!file.exists()) {
-        ALog.w(TAG, String.format("路径【%s】下的Dex文件不存在", path));
-        return list;
-      }
-
-      DexFile df = new DexFile(path);//通过DexFile查找当前的APK中可执行文件
-      Enumeration<String> enumeration = df.entries();//获取df中的元素  这里包含了所有可执行的类名 该类名包含了包名+类名的方式
-      while (enumeration.hasMoreElements()) {
-        String _className = enumeration.nextElement();
-        if (!_className.contains(filterClass)) {
-          continue;
-        }
-        if (_className.contains(filterClass)) {
-          list.add(_className);
-        }
-      }
-      df.close();
-    } catch (IOException e) {
-      e.printStackTrace();
-    }
-    return list;
-  }
-
-  /**
-   * 拦截window.location.replace数据
-   *
-   * @return 重定向url
-   */
-  public static String getWindowReplaceUrl(String text) {
-    if (TextUtils.isEmpty(text)) {
-      ALog.e(TAG, "拦截数据为null");
-      return null;
-    }
-    String reg = Regular.REG_WINLOD_REPLACE;
-    Pattern p = Pattern.compile(reg);
-    Matcher m = p.matcher(text);
-    if (m.find()) {
-      String s = m.group();
-      s = s.substring(9, s.length() - 2);
-      return s;
-    }
-    return null;
-  }
-
-  /**
-   * 获取sdcard app的缓存目录
-   *
-   * @return "/mnt/sdcard/Android/data/{package_name}/files/"
-   */
-  public static String getAppPath(Context context) {
-    //判断是否存在sd卡
-    boolean sdExist = android.os.Environment.MEDIA_MOUNTED.equals(
-        android.os.Environment.getExternalStorageState());
-    if (!sdExist) {
-      return null;
-    } else {
-      //获取sd卡路径
-      File file = context.getExternalFilesDir(null);
-      String dir;
-      if (file != null) {
-        dir = file.getPath() + "/";
-      } else {
-        dir = Environment.getExternalStorageDirectory().getPath()
-            + "/Android/data/"
-            + context.getPackageName()
-            + "/files/";
-      }
-      return dir;
-    }
-  }
-
-  /**
-   * 获取map泛型类型
-   *
-   * @param map list类型字段
-   * @return 泛型类型
-   */
-  public static Class[] getMapParamType(Field map) {
-    Class type = map.getType();
-    if (!type.isAssignableFrom(Map.class)) {
-      ALog.d(TAG, "字段类型不是Map");
-      return null;
-    }
-
-    Type fc = map.getGenericType();
-
-    if (fc == null) {
-      ALog.d(TAG, "该字段没有泛型参数");
-      return null;
-    }
-
-    if (fc instanceof ParameterizedType) {
-      ParameterizedType pt = (ParameterizedType) fc;
-      Type[] types = pt.getActualTypeArguments();
-      Class[] clazz = new Class[2];
-      clazz[0] = (Class) types[0];
-      clazz[1] = (Class) types[1];
-      return clazz;
-    }
-    return null;
-  }
-
-  /**
-   * 获取list泛型类型
-   *
-   * @param list list类型字段
-   * @return 泛型类型
-   */
-
-  public static Class getListParamType(Field list) {
-    Class type = list.getType();
-    if (!type.isAssignableFrom(List.class)) {
-      ALog.d(TAG, "字段类型不是List");
-      return null;
-    }
-
-    Type fc = list.getGenericType(); // 关键的地方，如果是List类型，得到其Generic的类型
-
-    if (fc == null) {
-      ALog.d(TAG, "该字段没有泛型参数");
-      return null;
-    }
-
-    if (fc instanceof ParameterizedType) { //如果是泛型参数的类型
-      ParameterizedType pt = (ParameterizedType) fc;
-      return (Class) pt.getActualTypeArguments()[0]; //得到泛型里的class类型对象。
-    }
-    return null;
-  }
-
-  /**
-   * 创建文件名，如果url链接有后缀名，则使用url中的后缀名
-   *
-   * @return url 的 hashKey
-   */
-  public static String createFileName(String url) {
-    int end = url.indexOf("?");
-    String tempUrl, fileName = "";
-    if (end > 0) {
-      tempUrl = url.substring(0, end);
-      int tempEnd = tempUrl.lastIndexOf("/");
-      if (tempEnd > 0) {
-        fileName = tempUrl.substring(tempEnd + 1, tempUrl.length());
-      }
-    } else {
-      int tempEnd = url.lastIndexOf("/");
-      if (tempEnd > 0) {
-        fileName = url.substring(tempEnd + 1, url.length());
-      }
-    }
-    if (TextUtils.isEmpty(fileName)) {
-      fileName = CommonUtil.keyToHashKey(url);
-    }
-    return fileName;
-  }
-
-  /**
-   * 分割获取url，协议，ip/域名，端口，内容
-   *
-   * @param url 输入的url{@code String url = "ftp://z:z@dygod18.com:21211/[电影天堂www.dy2018.com]猩球崛起3：终极之战BD国英双语中英双字.mkv";}
-   */
-  public static FtpUrlEntity getFtpUrlInfo(String url) {
-    Uri uri = Uri.parse(url);
-
-    String userInfo = uri.getUserInfo(), remotePath = uri.getPath();
-    ALog.d(TAG,
-        String.format("scheme = %s, user = %s, host = %s, port = %s, path = %s", uri.getScheme(),
-            userInfo, uri.getHost(), uri.getPort(), remotePath));
-
-    FtpUrlEntity entity = new FtpUrlEntity();
-    entity.url = url;
-    entity.hostName = uri.getHost();
-    entity.port = uri.getPort() == -1 ? "21" : String.valueOf(uri.getPort());
-    if (!TextUtils.isEmpty(userInfo)) {
-      String[] temp = userInfo.split(":");
-      if (temp.length == 2) {
-        entity.user = temp[0];
-        entity.password = temp[1];
-      } else {
-        entity.user = userInfo;
-      }
-    }
-    entity.scheme = uri.getScheme();
-    entity.remotePath = TextUtils.isEmpty(remotePath) ? "/" : remotePath;
-    return entity;
-  }
-
-  /**
-   * 转换Url
-   *
-   * @param url 原地址
-   * @return 转换后的地址
-   */
-  public static String convertUrl(String url) {
-    Uri uri = Uri.parse(url);
-    url = uri.toString();
-    if (hasDoubleCharacter(url)) {
-      //预先处理空格，URLEncoder只会把空格转换为+
-      url = url.replaceAll(" ", "%20");
-      //匹配双字节字符(包括汉字在内)
-      String regex = Regular.REG_DOUBLE_CHAR_AND_SPACE;
-      Pattern p = Pattern.compile(regex);
-      Matcher m = p.matcher(url);
-      Set<String> strs = new HashSet<>();
-      while (m.find()) {
-        strs.add(m.group());
-      }
-      try {
-        for (String str : strs) {
-          url = url.replaceAll(str, URLEncoder.encode(str, "UTF-8"));
-        }
-      } catch (UnsupportedEncodingException e) {
-        e.printStackTrace();
-      }
-    }
-    return url;
-  }
-
-  /**
-   * 判断是否有双字节字符(包括汉字在内) 和空格、制表符、回车
-   *
-   * @param chineseStr 需要进行判断的字符串
-   * @return {@code true}有双字节字符，{@code false} 无双字节字符
-   */
-  public static boolean hasDoubleCharacter(String chineseStr) {
-    char[] charArray = chineseStr.toCharArray();
-    for (char aCharArray : charArray) {
-      if (((aCharArray >= 0x0391) && (aCharArray <= 0xFFE5)) || (aCharArray == 0x0d) || (aCharArray
-          == 0x0a) || (aCharArray == 0x20)) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  /**
-   * base64 解密字符串
-   *
-   * @param str 被加密的字符串
-   * @return 解密后的字符串
-   */
-  public static String decryptBASE64(String str) {
-    return new String(Base64.decode(str.getBytes(), Base64.DEFAULT));
-  }
-
-  /**
-   * base64 加密字符串
-   *
-   * @param str 需要加密的字符串
-   * @return 加密后的字符串
-   */
-  public static String encryptBASE64(String str) {
-    return Base64.encodeToString(str.getBytes(), Base64.DEFAULT);
-  }
-
-  /**
-   * 字符串编码转换
-   */
-  public static String strCharSetConvert(String oldStr, String charSet) {
-    try {
-      return new String(oldStr.getBytes(), charSet);
-    } catch (UnsupportedEncodingException e) {
-      e.printStackTrace();
-    }
-    return null;
-  }
-
-  /**
-   * 根据下载任务组的url创建key
-   *
-   * @return urls 为 null 或者 size为0，返回""
-   */
-  public static String getMd5Code(List<String> urls) {
-    if (urls == null || urls.size() < 1) return "";
-    String md5 = "";
-    StringBuilder sb = new StringBuilder();
-    for (String url : urls) {
-      sb.append(url);
-    }
-    try {
-      MessageDigest md = MessageDigest.getInstance("MD5");
-      md.update(sb.toString().getBytes());
-      md5 = new BigInteger(1, md.digest()).toString(16);
-    } catch (NoSuchAlgorithmException e) {
-      ALog.e(TAG, e.getMessage());
-    }
-    return md5;
-  }
-
-  /**
-   * 获取字符串的md5
-   *
-   * @return 字符串为空或获取md5失败，则返回""
-   */
-  public static String getStrMd5(String str) {
-    if (TextUtils.isEmpty(str)) return "";
-    try {
-      MessageDigest md = MessageDigest.getInstance("MD5");
-      md.update(str.getBytes());
-      return new BigInteger(1, md.digest()).toString(16);
-    } catch (NoSuchAlgorithmException e) {
-      ALog.e(TAG, e.getMessage());
-    }
-    return "";
-  }
-
-  /**
-   * 删除任务组记录
-   *
-   * @param removeFile {@code true} 不仅删除任务数据库记录，还会删除已经删除完成的文件 {@code false}如果任务已经完成，只删除任务数据库记录
-   */
-  public static void delGroupTaskRecord(boolean removeFile, DownloadGroupEntity groupEntity) {
-    if (groupEntity == null) {
-      ALog.e(TAG, "删除下载任务组记录失败，任务组实体为null");
-      return;
-    }
-    List<TaskRecord> records =
-        DbEntity.findDatas(TaskRecord.class, "dGroupHash=?", groupEntity.getGroupHash());
-
-    if (records == null || records.isEmpty()) {
-      ALog.w(TAG, "组任务记录删除失败，记录为null");
-    } else {
-      for (TaskRecord record : records) {
-        // 删除分块文件
-        if (record.isBlock) {
-          for (int i = 0, len = record.threadNum; i < len; i++) {
-            File partFile = new File(String.format(AbsFileer.SUB_PATH, record.filePath, i));
-            if (partFile.exists()) {
-              partFile.delete();
-            }
-          }
-        }
-        record.deleteData();
-      }
-    }
-
-    List<DownloadEntity> subs = groupEntity.getSubEntities();
-    if (subs != null) {
-      for (DownloadEntity sub : subs) {
-        File file = new File(sub.getDownloadPath());
-        if (file.exists() && (removeFile || !sub.isComplete())) {
-          file.delete();
-        }
-      }
-    }
-
-    if (!TextUtils.isEmpty(groupEntity.getDirPath())) {
-      File dir = new File(groupEntity.getDirPath());
-      if (dir.exists() && (removeFile || !groupEntity.isComplete())) {
-        dir.delete();
-      }
-      groupEntity.deleteData();
-    }
-  }
-
-  /**
-   * 删除任务记录
-   *
-   * @param removeFile {@code true} 不仅删除任务数据库记录，还会删除已经完成的文件 {@code false}如果任务已经完成，只删除任务数据库记录
-   */
-  public static void delTaskRecord(TaskRecord record, boolean removeFile, AbsNormalEntity dEntity) {
-    if (dEntity == null) return;
-    File file;
-    if (dEntity instanceof DownloadEntity) {
-      file = new File(((DownloadEntity) dEntity).getDownloadPath());
-    } else if (dEntity instanceof UploadEntity) {
-      file = new File(((UploadEntity) dEntity).getFilePath());
-    } else {
-      ALog.w(TAG, "删除记录失败，未知类型");
-      return;
-    }
-    if (removeFile || !dEntity.isComplete()) {
-      // 删除分块文件
-      if (record.isBlock) {
-        for (int i = 0, len = record.threadNum; i < len; i++) {
-          File partFile = new File(String.format(AbsFileer.SUB_PATH, record.filePath, i));
-          if (partFile.exists()) {
-            partFile.delete();
-          }
-        }
-      }
-      if (file.exists()) {
-        file.delete();
-      }
-    }
-
-    if (record != null) {
-      record.deleteData();
-    }
-    //下载任务实体和下载实体为一对一关系，下载实体删除，任务实体自动删除
-    dEntity.deleteData();
-  }
-
-  /**
-   * 删除任务记录，默认删除文件
-   *
-   * @param filePath 文件路径
-   * @param removeFile {@code true} 不仅删除任务数据库记录，还会删除已经删除完成的文件 {@code false}如果任务已经完成，只删除任务数据库记录
-   * @param type {@code 1}下载任务的记录，{@code 2} 上传任务的记录 {@code false}如果任务已经完成，只删除任务数据库记录
-   */
-  public static void delTaskRecord(String filePath, int type, boolean removeFile) {
-    if (TextUtils.isEmpty(filePath)) {
-      throw new NullPointerException("删除记录失败，文件路径为空");
-    }
-    if (type != 1 && type != 2) {
-      throw new IllegalArgumentException("任务记录类型错误");
-    }
-    TaskRecord record = DbEntity.findFirst(TaskRecord.class, "filePath=?", filePath);
-    File file = new File(filePath);
-    if (record == null) {
-      ALog.w(TAG, "记录为空");
-    } else {
-      // 删除分块文件
-      if (record.isBlock) {
-        for (int i = 0, len = record.threadNum; i < len; i++) {
-          File partFile = new File(String.format(AbsFileer.SUB_PATH, record.filePath, i));
-          if (partFile.exists()) {
-            partFile.delete();
-          }
-        }
-      }
-
-      record.deleteData();
-    }
-    if (file.exists() && removeFile) {
-      file.delete();
-    }
-    //下载任务实体和下载实体为一对一关系，下载实体删除，任务实体自动删除
-    if (type == 1) {
-      DbEntity.deleteData(DownloadEntity.class, "downloadPath=?", filePath);
-    } else {
-      DbEntity.deleteData(UploadEntity.class, "filePath=?", filePath);
-    }
-  }
-
-  /**
-   * 删除任务记录，默认删除文件
-   *
-   * @param filePath 文件路径
-   * @param type {@code 1}下载任务的记录，{@code 2} 上传任务的记录 {@code false}如果任务已经完成，只删除任务数据库记录
-   */
-  public static void delTaskRecord(String filePath, int type) {
-    delTaskRecord(filePath, type, false);
-  }
-
-  /**
-   * 获取CPU核心数
-   */
-  public static int getCoresNum() {
-    //Private Class to display only CPU devices in the directory listing
-    class CpuFilter implements FileFilter {
-      @Override public boolean accept(File pathname) {
-        //Check if filename is "cpu", followed by a single digit number
-        return Pattern.matches("cpu[0-9]", pathname.getName());
-      }
-    }
-
-    try {
-      //Get directory containing CPU info
-      File dir = new File("/sys/devices/system/cpu/");
-      //Filter to only list the devices we care about
-      File[] files = dir.listFiles(new CpuFilter());
-      ALog.d(TAG, "CPU Count: " + files.length);
-      //Return the number of cores (virtual CPU devices)
-      return files.length;
-    } catch (Exception e) {
-      //Print exception
-      ALog.d(TAG, "CPU Count: Failed.");
-      e.printStackTrace();
-      //Default to return 1 core
-      return 1;
-    }
-  }
-
-  /**
-   * 通过流创建文件
-   */
-  public static void createFileFormInputStream(InputStream is, String path) {
-    try {
-      FileOutputStream fos = new FileOutputStream(path);
-      byte[] buf = new byte[1024];
-      int len;
-      while ((len = is.read(buf)) > 0) {
-        fos.write(buf, 0, len);
-      }
-      is.close();
-      fos.flush();
-      fos.close();
-    } catch (IOException e) {
-      e.printStackTrace();
-    }
-  }
-
-  /**
-   * 校验文件MD5码
-   */
-  public static boolean checkMD5(String md5, File updateFile) {
-    if (TextUtils.isEmpty(md5) || updateFile == null) {
-      ALog.e(TAG, "MD5 string empty or updateFile null");
-      return false;
-    }
-
-    String calculatedDigest = getFileMD5(updateFile);
-    if (calculatedDigest == null) {
-      ALog.e(TAG, "calculatedDigest null");
-      return false;
-    }
-    return calculatedDigest.equalsIgnoreCase(md5);
-  }
-
-  /**
-   * 校验文件MD5码
-   */
-  public static boolean checkMD5(String md5, InputStream is) {
-    if (TextUtils.isEmpty(md5) || is == null) {
-      ALog.e(TAG, "MD5 string empty or updateFile null");
-      return false;
-    }
-
-    String calculatedDigest = getFileMD5(is);
-    if (calculatedDigest == null) {
-      ALog.e(TAG, "calculatedDigest null");
-      return false;
-    }
-    return calculatedDigest.equalsIgnoreCase(md5);
-  }
-
-  /**
-   * 获取文件MD5码
-   */
-  public static String getFileMD5(File updateFile) {
-    InputStream is;
-    try {
-      is = new FileInputStream(updateFile);
-    } catch (FileNotFoundException e) {
-      ALog.e(TAG, e);
-      return null;
-    }
-
-    return getFileMD5(is);
-  }
-
-  /**
-   * 获取文件MD5码
-   */
-  public static String getFileMD5(InputStream is) {
-    MessageDigest digest;
-    try {
-      digest = MessageDigest.getInstance("MD5");
-    } catch (NoSuchAlgorithmException e) {
-      ALog.e(TAG, e);
-      return null;
-    }
-
-    byte[] buffer = new byte[8192];
-    int read;
-    try {
-      while ((read = is.read(buffer)) > 0) {
-        digest.update(buffer, 0, read);
-      }
-      byte[] md5sum = digest.digest();
-      BigInteger bigInt = new BigInteger(1, md5sum);
-      String output = bigInt.toString(16);
-      // Fill to 32 chars
-      output = String.format("%32s", output).replace(' ', '0');
-      return output;
-    } catch (IOException e) {
-      throw new RuntimeException("Unable to process file for MD5", e);
-    } finally {
-      try {
-        is.close();
-      } catch (IOException e) {
-        ALog.e(TAG, e);
-      }
-    }
-  }
-
-  /**
-   * 创建任务命令
-   *
-   * @param taskType {@link ICmd#TASK_TYPE_DOWNLOAD}、{@link ICmd#TASK_TYPE_DOWNLOAD_GROUP}、{@link
-   * ICmd#TASK_TYPE_UPLOAD}
-   */
-  public static <T extends AbsTaskWrapper> AbsNormalCmd createNormalCmd(T entity, int cmd,
-      int taskType) {
-    return NormalCmdFactory.getInstance().createCmd(entity, cmd, taskType);
-  }
-
-  /**
-   * 创建任务组命令
-   *
-   * @param childUrl 子任务url
-   */
-  public static <T extends AbsGroupTaskWrapper> AbsGroupCmd createGroupCmd(String target, T entity,
-      int cmd, String childUrl) {
-    return GroupCmdFactory.getInstance().createCmd(target, entity, cmd, childUrl);
-  }
-
-  /**
-   * 创建隐性的Intent
-   */
-  public static Intent createIntent(String packageName, String action) {
-    Uri.Builder builder = new Uri.Builder();
-    builder.scheme(packageName);
-    Uri uri = builder.build();
-    Intent intent = new Intent(action);
-    intent.setData(uri);
-    return intent;
-  }
-
-  /**
-   * 存储字符串到配置文件
-   *
-   * @param preName 配置文件名
-   * @param key 存储的键值
-   * @param value 需要存储的字符串
-   * @return 成功标志
-   */
-  public static Boolean putString(String preName, Context context, String key, String value) {
-    SharedPreferences pre = context.getSharedPreferences(preName, Context.MODE_PRIVATE);
-    SharedPreferences.Editor editor = pre.edit();
-    editor.putString(key, value);
-    return editor.commit();
-  }
-
-  /**
-   * 从配置文件读取字符串
-   *
-   * @param preName 配置文件名
-   * @param key 字符串键值
-   * @return 键值对应的字符串, 默认返回""
-   */
-  public static String getString(String preName, Context context, String key) {
-    SharedPreferences pre = context.getSharedPreferences(preName, Context.MODE_PRIVATE);
-    return pre.getString(key, "");
-  }
-
-  /**
-   * 获取所有字段，包括父类的字段
-   */
-  public static List<Field> getAllFields(Class clazz) {
-    List<Field> fields = new ArrayList<>();
-    Class personClazz = clazz.getSuperclass();
-    if (personClazz != null) {
-      Class rootClazz = personClazz.getSuperclass();
-      if (rootClazz != null) {
-        Collections.addAll(fields, rootClazz.getDeclaredFields());
-      }
-      Collections.addAll(fields, personClazz.getDeclaredFields());
-    }
-    Collections.addAll(fields, clazz.getDeclaredFields());
-    return fields;
-  }
-
-  /**
-   * 获取当前类里面的所在字段
-   */
-  public static Field[] getFields(Class clazz) {
-    Field[] fields = null;
-    fields = clazz.getDeclaredFields();
-    if (fields == null || fields.length == 0) {
-      Class superClazz = clazz.getSuperclass();
-      if (superClazz != null) {
-        fields = getFields(superClazz);
-      }
-    }
-    return fields;
-  }
-
-  /**
-   * 获取类里面的指定对象，如果该类没有则从父类查询
-   */
-  public static Field getField(Class clazz, String name) {
-    Field field = null;
-    try {
-      field = clazz.getDeclaredField(name);
-    } catch (NoSuchFieldException e) {
-      try {
-        field = clazz.getField(name);
-      } catch (NoSuchFieldException e1) {
-        if (clazz.getSuperclass() == null) {
-          return field;
-        } else {
-          field = getField(clazz.getSuperclass(), name);
-        }
-      }
-    }
-    if (field != null) {
-      field.setAccessible(true);
-    }
-    return field;
-  }
-
-  /**
-   * 字符串转hashcode
-   */
-  public static int keyToHashCode(String str) {
-    int total = 0;
-    for (int i = 0; i < str.length(); i++) {
-      char ch = str.charAt(i);
-      if (ch == '-') ch = (char) 28; // does not contain the same last 5 bits as any letter
-      if (ch == '\'') ch = (char) 29; // nor this
-      total = (total * 33) + (ch & 0x1F);
-    }
-    return total;
-  }
-
-  /**
-   * 将key转换为16进制码
-   *
-   * @param key 缓存的key
-   * @return 转换后的key的值, 系统便是通过该key来读写缓存
-   */
-  public static String keyToHashKey(String key) {
-    String cacheKey;
-    try {
-      final MessageDigest mDigest = MessageDigest.getInstance("MD5");
-      mDigest.update(key.getBytes());
-      cacheKey = bytesToHexString(mDigest.digest());
-    } catch (NoSuchAlgorithmException e) {
-      cacheKey = String.valueOf(key.hashCode());
-    }
-    return cacheKey;
-  }
-
-  /**
-   * 将普通字符串转换为16位进制字符串
-   */
-  public static String bytesToHexString(byte[] src) {
-    StringBuilder stringBuilder = new StringBuilder("0x");
-    if (src == null || src.length <= 0) {
-      return null;
-    }
-    char[] buffer = new char[2];
-    for (byte aSrc : src) {
-      buffer[0] = Character.forDigit((aSrc >>> 4) & 0x0F, 16);
-      buffer[1] = Character.forDigit(aSrc & 0x0F, 16);
-      stringBuilder.append(buffer);
-    }
-    return stringBuilder.toString();
-  }
-
-  /**
-   * 获取对象名
-   *
-   * @param obj 对象
-   * @return 对象名
-   */
-  public static String getClassName(Object obj) {
-    String arrays[] = obj.getClass().getName().split("\\.");
-    return arrays[arrays.length - 1];
-  }
-
-  /**
-   * 获取对象名
-   *
-   * @param clazz clazz
-   * @return 对象名
-   */
-  public static String getClassName(Class clazz) {
-    String arrays[] = clazz.getName().split("\\.");
-    return arrays[arrays.length - 1];
-  }
-
-  /**
-   * 格式化文件大小
-   *
-   * @param size file.length() 获取文件大小
-   */
-  public static String formatFileSize(double size) {
-    if (size < 0) {
-      return "0kb";
-    }
-    double kiloByte = size / 1024;
-    if (kiloByte < 1) {
-      return size + "b";
-    }
-
-    double megaByte = kiloByte / 1024;
-    if (megaByte < 1) {
-      BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
-      return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "kb";
-    }
-
-    double gigaByte = megaByte / 1024;
-    if (gigaByte < 1) {
-      BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
-      return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "mb";
-    }
-
-    double teraBytes = gigaByte / 1024;
-    if (teraBytes < 1) {
-      BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
-      return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "gb";
-    }
-    BigDecimal result4 = new BigDecimal(teraBytes);
-    return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "tb";
-  }
-
-  /**
-   * 创建目录 当目录不存在的时候创建文件，否则返回false
-   */
-  public static boolean createDir(String path) {
-    File file = new File(path);
-    if (!file.exists()) {
-      if (!file.mkdirs()) {
-        ALog.d(TAG, "创建失败，请检查路径和是否配置文件权限！");
-        return false;
-      }
-      return true;
-    }
-    return false;
-  }
-
-  /**
-   * 创建文件 当文件不存在的时候就创建一个文件。 如果文件存在，先删除原文件，然后重新创建一个新文件
-   *
-   * @return {@code true} 创建成功、{@code false} 创建失败
-   */
-  public static boolean createFile(String path) {
-    if (TextUtils.isEmpty(path)) {
-      ALog.e(TAG, "文件路径不能为null");
-      return false;
-    }
-    File file = new File(path);
-    if (file.getParentFile() == null || !file.getParentFile().exists()) {
-      ALog.d(TAG, "目标文件所在路径不存在，准备创建……");
-      if (!createDir(file.getParent())) {
-        ALog.d(TAG, "创建目录文件所在的目录失败！文件路径【" + path + "】");
-      }
-    }
-    // 创建目标文件
-    if (file.exists()) {
-      final File to = new File(file.getAbsolutePath() + System.currentTimeMillis());
-      if (file.renameTo(to)) {
-        to.delete();
-      } else {
-        file.delete();
-      }
-    }
-    try {
-      if (file.createNewFile()) {
-        ALog.d(TAG, "创建文件成功:" + file.getAbsolutePath());
-        return true;
-      }
-    } catch (IOException e) {
-      e.printStackTrace();
-      return false;
-    }
-    return false;
-  }
-
-  /**
-   * 通过文件名获取下载配置文件路径
-   *
-   * @param fileName 文件名
-   */
-  public static String getFileConfigPath(boolean isDownload, String fileName) {
-    return AriaManager.APP.getFilesDir().getPath() + (isDownload ? AriaManager.DOWNLOAD_TEMP_DIR
-        : AriaManager.UPLOAD_TEMP_DIR) + fileName + ".properties";
-  }
-
-  /**
-   * 修改任务路径，修改文件路径和任务记录信息。如果是分块任务，则修改分块文件的路径。
-   *
-   * @param oldPath 旧的文件路径
-   * @param newPath 新的文件路径
-   */
-  public static void modifyTaskRecord(String oldPath, String newPath) {
-    if (oldPath.equals(newPath)) {
-      ALog.w(TAG, "修改任务记录失败，新文件路径和旧文件路径一致");
-      return;
-    }
-    TaskRecord record = DbDataHelper.getTaskRecord(oldPath);
-    if (record == null) {
-      if (new File(oldPath).exists()) {
-        ALog.w(TAG, "修改任务记录失败，文件【" + oldPath + "】对应的任务记录不存在");
-      }
-      return;
-    }
-    if (!record.isBlock) {
-      File oldFile = new File(oldPath);
-      if (oldFile.exists()) {
-        oldFile.renameTo(new File(newPath));
-      }
-    }
-
-    record.filePath = newPath;
-    record.update();
-    // 修改线程记录
-    if (record.threadRecords != null && !record.threadRecords.isEmpty()) {
-      for (ThreadRecord tr : record.threadRecords) {
-        tr.key = newPath;
-        File blockFile = new File(String.format(AbsFileer.SUB_PATH, oldPath, tr.threadId));
-        if (blockFile.exists()){
-          blockFile.renameTo(new File(String.format(AbsFileer.SUB_PATH, newPath, tr.threadId)));
-        }
-      }
-      DbEntity.saveAll(record.threadRecords);
-    }
-  }
-
-  /**
-   * 读取下载配置文件
-   */
-  public static Properties loadConfig(File file) {
-    Properties properties = new Properties();
-    FileInputStream fis = null;
-    if (!file.exists()) {
-      createFile(file.getPath());
-    }
-    try {
-      fis = new FileInputStream(file);
-      properties.load(fis);
-    } catch (Exception e) {
-      e.printStackTrace();
-    } finally {
-      try {
-        if (fis != null) {
-          fis.close();
-        }
-      } catch (IOException e) {
-        e.printStackTrace();
-      }
-    }
-    return properties;
-  }
-
-  /**
-   * 保存配置文件
-   */
-  public static void saveConfig(File file, Properties properties) {
-    FileOutputStream fos = null;
-    try {
-      fos = new FileOutputStream(file, false);
-      properties.store(fos, null);
-    } catch (Exception e) {
-      e.printStackTrace();
-    } finally {
-      try {
-        if (fos != null) {
-          fos.flush();
-          fos.close();
-        }
-      } catch (IOException e) {
-        e.printStackTrace();
-      }
-    }
-  }
+/*
+ * Copyright (C) 2016 AriaLyy(https://github.com/AriaLyy/Aria)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.arialyy.aria.util;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.net.Uri;
+import android.os.Environment;
+import android.os.StatFs;
+import android.text.TextUtils;
+import android.util.Base64;
+import com.arialyy.aria.core.AriaManager;
+import com.arialyy.aria.core.FtpUrlEntity;
+import com.arialyy.aria.core.command.ICmd;
+import com.arialyy.aria.core.command.group.AbsGroupCmd;
+import com.arialyy.aria.core.command.group.GroupCmdFactory;
+import com.arialyy.aria.core.command.normal.AbsNormalCmd;
+import com.arialyy.aria.core.command.normal.NormalCmdFactory;
+import com.arialyy.aria.core.common.AbsFileer;
+import com.arialyy.aria.core.common.TaskRecord;
+import com.arialyy.aria.core.common.ThreadRecord;
+import com.arialyy.aria.core.download.DownloadEntity;
+import com.arialyy.aria.core.download.DownloadGroupEntity;
+import com.arialyy.aria.core.inf.AbsGroupTaskWrapper;
+import com.arialyy.aria.core.inf.AbsNormalEntity;
+import com.arialyy.aria.core.inf.AbsTaskWrapper;
+import com.arialyy.aria.core.upload.UploadEntity;
+import com.arialyy.aria.orm.DbEntity;
+import dalvik.system.DexFile;
+import java.io.File;
+import java.io.FileFilter;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+import java.io.UnsupportedEncodingException;
+import java.lang.reflect.Field;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.net.URLEncoder;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Created by lyy on 2016/1/22. 通用工具
+ */
+public class CommonUtil {
+  private static final String TAG = "CommonUtil";
+
+  /**
+   * 检查分块任务是否存在
+   *
+   * @param filePath 文件保存路径
+   * @return {@code true} 分块文件存在
+   */
+  public static boolean blockTaskExists(String filePath) {
+    return new File(String.format(AbsFileer.SUB_PATH, filePath, 0)).exists();
+  }
+
+  /**
+   * 删除文件
+   *
+   * @param path 文件路径
+   * @return {@code true}删除成功、{@code false}删除失败
+   */
+  public static boolean deleteFile(String path) {
+    if (TextUtils.isEmpty(path)) {
+      ALog.e(TAG, "删除文件失败，路径为空");
+      return false;
+    }
+    File file = new File(path);
+    if (file.exists()) {
+      final File to = new File(file.getAbsolutePath() + System.currentTimeMillis());
+      if (file.renameTo(to)) {
+        return to.delete();
+      } else {
+        return file.delete();
+      }
+    }
+    return false;
+  }
+
+  /**
+   * 将对象写入文件
+   *
+   * @param filePath 文件路径
+   * @param data data数据必须实现{@link Serializable}接口
+   */
+  public static void writeObjToFile(String filePath, Object data) {
+    if (!(data instanceof Serializable)) {
+      ALog.e(TAG, "对象写入文件失败，data数据必须实现Serializable接口");
+      return;
+    }
+    FileOutputStream ops = null;
+    try {
+      if (!createFile(filePath)) {
+        return;
+      }
+      ops = new FileOutputStream(filePath);
+      ObjectOutputStream oops = new ObjectOutputStream(ops);
+      oops.writeObject(data);
+    } catch (FileNotFoundException e) {
+      e.printStackTrace();
+    } catch (IOException e) {
+      e.printStackTrace();
+    } finally {
+      if (ops != null) {
+        try {
+          ops.close();
+        } catch (IOException e) {
+          e.printStackTrace();
+        }
+      }
+    }
+  }
+
+  /**
+   * 从文件中读取对象
+   *
+   * @param filePath 文件路径
+   * @return 如果读取成功，返回相应的Obj对象，读取失败，返回null
+   */
+  public static Object readObjFromFile(String filePath) {
+    if (TextUtils.isEmpty(filePath)) {
+      ALog.e(TAG, "文件路径为空");
+      return null;
+    }
+    File file = new File(filePath);
+    if (!file.exists()) {
+      ALog.e(TAG, String.format("文件【%s】不存在", filePath));
+      return null;
+    }
+    FileInputStream fis = null;
+    try {
+      fis = new FileInputStream(filePath);
+      ObjectInputStream oois = new ObjectInputStream(fis);
+      return oois.readObject();
+    } catch (FileNotFoundException e) {
+      e.printStackTrace();
+    } catch (IOException e) {
+      e.printStackTrace();
+    } catch (ClassNotFoundException e) {
+      e.printStackTrace();
+    } finally {
+      if (fis != null) {
+        try {
+          fis.close();
+        } catch (IOException e) {
+          e.printStackTrace();
+        }
+      }
+    }
+    return null;
+  }
+
+  /**
+   * 获取分块文件的快大小
+   *
+   * @param fileLen 文件总长度
+   * @param blockId 分块id
+   * @param blockNum 分块数量
+   * @return 分块长度
+   */
+  public static long getBlockLen(long fileLen, int blockId, int blockNum) {
+    final long averageLen = fileLen / blockNum;
+    return blockId == blockNum - 1 ? (fileLen - blockId * averageLen) : averageLen;
+  }
+
+  /**
+   * 检查SD内存空间是否充足
+   *
+   * @param filePath 文件保存路径
+   * @param fileSize 文件大小
+   * @return {@code false} 内存空间不足，{@code true}内存空间足够
+   */
+  public static boolean checkSDMemorySpace(String filePath, long fileSize) {
+    List<String> dirs = FileUtil.getSDPathList(AriaManager.APP);
+    if (dirs == null || dirs.isEmpty()) {
+      return true;
+    }
+    for (String path : dirs) {
+      if (filePath.contains(path)) {
+        if (fileSize > 0 && fileSize > getAvailableExternalMemorySize(path)) {
+          return false;
+        }
+      }
+    }
+    return true;
+  }
+
+  /**
+   * sdcard 可用大小
+   *
+   * @param sdcardPath sdcard 根路径
+   * @return 单位为：byte
+   */
+  public static long getAvailableExternalMemorySize(String sdcardPath) {
+    StatFs stat = new StatFs(sdcardPath);
+    long blockSize = stat.getBlockSize();
+    long availableBlocks = stat.getAvailableBlocks();
+    return availableBlocks * blockSize;
+  }
+
+  /**
+   * sdcard 总大小
+   *
+   * @param sdcardPath sdcard 根路径
+   * @return 单位为：byte
+   */
+  public static long getTotalExternalMemorySize(String sdcardPath) {
+    StatFs stat = new StatFs(sdcardPath);
+    long blockSize = stat.getBlockSize();
+    long totalBlocks = stat.getBlockCount();
+    return totalBlocks * blockSize;
+  }
+
+  /**
+   * 获取某包下所有类
+   *
+   * @param className 过滤的类名
+   * @return 类的完整名称
+   */
+  public static List<String> getPkgClassNames(Context context, String className) {
+    List<String> classNameList = new ArrayList<>();
+    String pPath = context.getPackageCodePath();
+    File dir = new File(pPath).getParentFile();
+    String[] paths = dir.list();
+    if (paths == null) {
+      classNameList.addAll(getPkgClassName(pPath, className));
+    } else {
+      String dPath = dir.getPath();
+      for (String path : dir.list()) {
+        String fPath = dPath + "/" + path;
+        if (!fPath.endsWith(".apk")) {
+          continue;
+        }
+        classNameList.addAll(getPkgClassName(fPath, className));
+      }
+    }
+    return classNameList;
+  }
+
+  /**
+   * 获取指定包名下的所有类
+   *
+   * @param path dex路径
+   * @param filterClass 需要过滤的类
+   */
+  public static List<String> getPkgClassName(String path, String filterClass) {
+    List<String> list = new ArrayList<>();
+    try {
+      File file = new File(path);
+      if (!file.exists()) {
+        ALog.w(TAG, String.format("路径【%s】下的Dex文件不存在", path));
+        return list;
+      }
+
+      DexFile df = new DexFile(path);//通过DexFile查找当前的APK中可执行文件
+      Enumeration<String> enumeration = df.entries();//获取df中的元素  这里包含了所有可执行的类名 该类名包含了包名+类名的方式
+      while (enumeration.hasMoreElements()) {
+        String _className = enumeration.nextElement();
+        if (!_className.contains(filterClass)) {
+          continue;
+        }
+        if (_className.contains(filterClass)) {
+          list.add(_className);
+        }
+      }
+      df.close();
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+    return list;
+  }
+
+  /**
+   * 拦截window.location.replace数据
+   *
+   * @return 重定向url
+   */
+  public static String getWindowReplaceUrl(String text) {
+    if (TextUtils.isEmpty(text)) {
+      ALog.e(TAG, "拦截数据为null");
+      return null;
+    }
+    String reg = Regular.REG_WINLOD_REPLACE;
+    Pattern p = Pattern.compile(reg);
+    Matcher m = p.matcher(text);
+    if (m.find()) {
+      String s = m.group();
+      s = s.substring(9, s.length() - 2);
+      return s;
+    }
+    return null;
+  }
+
+  /**
+   * 获取sdcard app的缓存目录
+   *
+   * @return "/mnt/sdcard/Android/data/{package_name}/files/"
+   */
+  public static String getAppPath(Context context) {
+    //判断是否存在sd卡
+    boolean sdExist = android.os.Environment.MEDIA_MOUNTED.equals(
+        android.os.Environment.getExternalStorageState());
+    if (!sdExist) {
+      return null;
+    } else {
+      //获取sd卡路径
+      File file = context.getExternalFilesDir(null);
+      String dir;
+      if (file != null) {
+        dir = file.getPath() + "/";
+      } else {
+        dir = Environment.getExternalStorageDirectory().getPath()
+            + "/Android/data/"
+            + context.getPackageName()
+            + "/files/";
+      }
+      return dir;
+    }
+  }
+
+  /**
+   * 获取map泛型类型
+   *
+   * @param map list类型字段
+   * @return 泛型类型
+   */
+  public static Class[] getMapParamType(Field map) {
+    Class type = map.getType();
+    if (!type.isAssignableFrom(Map.class)) {
+      ALog.d(TAG, "字段类型不是Map");
+      return null;
+    }
+
+    Type fc = map.getGenericType();
+
+    if (fc == null) {
+      ALog.d(TAG, "该字段没有泛型参数");
+      return null;
+    }
+
+    if (fc instanceof ParameterizedType) {
+      ParameterizedType pt = (ParameterizedType) fc;
+      Type[] types = pt.getActualTypeArguments();
+      Class[] clazz = new Class[2];
+      clazz[0] = (Class) types[0];
+      clazz[1] = (Class) types[1];
+      return clazz;
+    }
+    return null;
+  }
+
+  /**
+   * 获取list泛型类型
+   *
+   * @param list list类型字段
+   * @return 泛型类型
+   */
+
+  public static Class getListParamType(Field list) {
+    Class type = list.getType();
+    if (!type.isAssignableFrom(List.class)) {
+      ALog.d(TAG, "字段类型不是List");
+      return null;
+    }
+
+    Type fc = list.getGenericType(); // 关键的地方，如果是List类型，得到其Generic的类型
+
+    if (fc == null) {
+      ALog.d(TAG, "该字段没有泛型参数");
+      return null;
+    }
+
+    if (fc instanceof ParameterizedType) { //如果是泛型参数的类型
+      ParameterizedType pt = (ParameterizedType) fc;
+      return (Class) pt.getActualTypeArguments()[0]; //得到泛型里的class类型对象。
+    }
+    return null;
+  }
+
+  /**
+   * 创建文件名，如果url链接有后缀名，则使用url中的后缀名
+   *
+   * @return url 的 hashKey
+   */
+  public static String createFileName(String url) {
+    int end = url.indexOf("?");
+    String tempUrl, fileName = "";
+    if (end > 0) {
+      tempUrl = url.substring(0, end);
+      int tempEnd = tempUrl.lastIndexOf("/");
+      if (tempEnd > 0) {
+        fileName = tempUrl.substring(tempEnd + 1);
+      }
+    } else {
+      int tempEnd = url.lastIndexOf("/");
+      if (tempEnd > 0) {
+        fileName = url.substring(tempEnd + 1);
+      }
+    }
+    if (TextUtils.isEmpty(fileName)) {
+      fileName = CommonUtil.keyToHashKey(url);
+    }
+    return fileName;
+  }
+
+  /**
+   * 分割获取url，协议，ip/域名，端口，内容
+   *
+   * @param url 输入的url{@code String url = "ftp://z:z@dygod18.com:21211/[电影天堂www.dy2018.com]猩球崛起3：终极之战BD国英双语中英双字.mkv";}
+   */
+  public static FtpUrlEntity getFtpUrlInfo(String url) {
+    Uri uri = Uri.parse(url);
+
+    String userInfo = uri.getUserInfo(), remotePath = uri.getPath();
+    ALog.d(TAG,
+        String.format("scheme = %s, user = %s, host = %s, port = %s, path = %s", uri.getScheme(),
+            userInfo, uri.getHost(), uri.getPort(), remotePath));
+
+    FtpUrlEntity entity = new FtpUrlEntity();
+    entity.url = url;
+    entity.hostName = uri.getHost();
+    entity.port = uri.getPort() == -1 ? "21" : String.valueOf(uri.getPort());
+    if (!TextUtils.isEmpty(userInfo)) {
+      String[] temp = userInfo.split(":");
+      if (temp.length == 2) {
+        entity.user = temp[0];
+        entity.password = temp[1];
+      } else {
+        entity.user = userInfo;
+      }
+    }
+    entity.scheme = uri.getScheme();
+    entity.remotePath = TextUtils.isEmpty(remotePath) ? "/" : remotePath;
+    return entity;
+  }
+
+  /**
+   * 转换Url
+   *
+   * @param url 原地址
+   * @return 转换后的地址
+   */
+  public static String convertUrl(String url) {
+    Uri uri = Uri.parse(url);
+    url = uri.toString();
+    if (hasDoubleCharacter(url)) {
+      //预先处理空格，URLEncoder只会把空格转换为+
+      url = url.replaceAll(" ", "%20");
+      //匹配双字节字符(包括汉字在内)
+      String regex = Regular.REG_DOUBLE_CHAR_AND_SPACE;
+      Pattern p = Pattern.compile(regex);
+      Matcher m = p.matcher(url);
+      Set<String> strs = new HashSet<>();
+      while (m.find()) {
+        strs.add(m.group());
+      }
+      try {
+        for (String str : strs) {
+          url = url.replaceAll(str, URLEncoder.encode(str, "UTF-8"));
+        }
+      } catch (UnsupportedEncodingException e) {
+        e.printStackTrace();
+      }
+    }
+    return url;
+  }
+
+  /**
+   * 判断是否有双字节字符(包括汉字在内) 和空格、制表符、回车
+   *
+   * @param chineseStr 需要进行判断的字符串
+   * @return {@code true}有双字节字符，{@code false} 无双字节字符
+   */
+  public static boolean hasDoubleCharacter(String chineseStr) {
+    char[] charArray = chineseStr.toCharArray();
+    for (char aCharArray : charArray) {
+      if (((aCharArray >= 0x0391) && (aCharArray <= 0xFFE5)) || (aCharArray == 0x0d) || (aCharArray
+          == 0x0a) || (aCharArray == 0x20)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * base64 解密字符串
+   *
+   * @param str 被加密的字符串
+   * @return 解密后的字符串
+   */
+  public static String decryptBASE64(String str) {
+    return new String(Base64.decode(str.getBytes(), Base64.DEFAULT));
+  }
+
+  /**
+   * base64 加密字符串
+   *
+   * @param str 需要加密的字符串
+   * @return 加密后的字符串
+   */
+  public static String encryptBASE64(String str) {
+    return Base64.encodeToString(str.getBytes(), Base64.DEFAULT);
+  }
+
+  /**
+   * 字符串编码转换
+   */
+  public static String strCharSetConvert(String oldStr, String charSet) {
+    try {
+      return new String(oldStr.getBytes(), charSet);
+    } catch (UnsupportedEncodingException e) {
+      e.printStackTrace();
+    }
+    return null;
+  }
+
+  /**
+   * 根据下载任务组的url创建key
+   *
+   * @return urls 为 null 或者 size为0，返回""
+   */
+  public static String getMd5Code(List<String> urls) {
+    if (urls == null || urls.size() < 1) return "";
+    String md5 = "";
+    StringBuilder sb = new StringBuilder();
+    for (String url : urls) {
+      sb.append(url);
+    }
+    try {
+      MessageDigest md = MessageDigest.getInstance("MD5");
+      md.update(sb.toString().getBytes());
+      md5 = new BigInteger(1, md.digest()).toString(16);
+    } catch (NoSuchAlgorithmException e) {
+      ALog.e(TAG, e.getMessage());
+    }
+    return md5;
+  }
+
+  /**
+   * 获取字符串的md5
+   *
+   * @return 字符串为空或获取md5失败，则返回""
+   */
+  public static String getStrMd5(String str) {
+    if (TextUtils.isEmpty(str)) return "";
+    try {
+      MessageDigest md = MessageDigest.getInstance("MD5");
+      md.update(str.getBytes());
+      return new BigInteger(1, md.digest()).toString(16);
+    } catch (NoSuchAlgorithmException e) {
+      ALog.e(TAG, e.getMessage());
+    }
+    return "";
+  }
+
+  /**
+   * 删除任务组记录
+   *
+   * @param removeFile {@code true} 不仅删除任务数据库记录，还会删除已经删除完成的文件 {@code false}如果任务已经完成，只删除任务数据库记录
+   */
+  public static void delGroupTaskRecord(DownloadGroupEntity groupEntity, boolean removeFile) {
+    if (groupEntity == null) {
+      ALog.e(TAG, "删除下载任务组记录失败，任务组实体为null");
+      return;
+    }
+    List<TaskRecord> records =
+        DbEntity.findDatas(TaskRecord.class, "dGroupHash=?", groupEntity.getGroupHash());
+
+    if (records == null || records.isEmpty()) {
+      ALog.w(TAG, "组任务记录删除失败，记录为null");
+    } else {
+      for (TaskRecord record : records) {
+        // 删除分块文件
+        if (record.isBlock) {
+          for (int i = 0, len = record.threadNum; i < len; i++) {
+            File partFile = new File(String.format(AbsFileer.SUB_PATH, record.filePath, i));
+            if (partFile.exists()) {
+              partFile.delete();
+            }
+          }
+        }
+        record.deleteData();
+      }
+    }
+
+    List<DownloadEntity> subs = groupEntity.getSubEntities();
+    if (subs != null) {
+      for (DownloadEntity sub : subs) {
+        File file = new File(sub.getDownloadPath());
+        if (file.exists() && (removeFile || !sub.isComplete())) {
+          file.delete();
+        }
+      }
+    }
+
+    if (!TextUtils.isEmpty(groupEntity.getDirPath())) {
+      File dir = new File(groupEntity.getDirPath());
+      if (dir.exists() && (removeFile || !groupEntity.isComplete())) {
+        dir.delete();
+      }
+      groupEntity.deleteData();
+    }
+  }
+
+  /**
+   * 删除任务记录
+   *
+   * @param removeFile {@code true} 不仅删除任务数据库记录，还会删除已经完成的文件 {@code false}如果任务已经完成，只删除任务数据库记录
+   */
+  public static void delTaskRecord(AbsNormalEntity dEntity, boolean removeFile) {
+    if (dEntity == null) return;
+    String filePath;
+    int type;
+    if (dEntity instanceof DownloadEntity) {
+      type = 1;
+      filePath = ((DownloadEntity) dEntity).getDownloadPath();
+    } else if (dEntity instanceof UploadEntity) {
+      type = 2;
+      filePath = ((UploadEntity) dEntity).getFilePath();
+    } else {
+      ALog.w(TAG, "删除记录失败，未知类型");
+      return;
+    }
+    delTaskRecord(filePath, type, removeFile);
+  }
+
+  /**
+   * 删除任务记录，默认删除文件
+   *
+   * @param filePath 文件路径
+   * @param removeFile {@code true} 不仅删除任务数据库记录，还会删除已经删除完成的文件 {@code false}如果任务已经完成，只删除任务数据库记录
+   * @param type {@code 1}下载任务的记录，{@code 2} 上传任务的记录 {@code false}如果任务已经完成，只删除任务数据库记录
+   */
+  public static void delTaskRecord(String filePath, int type, boolean removeFile) {
+    if (TextUtils.isEmpty(filePath)) {
+      throw new NullPointerException("删除记录失败，文件路径为空");
+    }
+    if (type != 1 && type != 2) {
+      throw new IllegalArgumentException("任务记录类型错误");
+    }
+    TaskRecord record = DbEntity.findFirst(TaskRecord.class, "filePath=?", filePath);
+    DbEntity.deleteData(ThreadRecord.class, "key=?", filePath);
+
+    File file = new File(filePath);
+    if (record == null) {
+      ALog.w(TAG, "记录为空");
+    } else {
+      // 删除分块文件
+      if (record.isBlock) {
+        for (int i = 0, len = record.threadNum; i < len; i++) {
+          File partFile = new File(String.format(AbsFileer.SUB_PATH, record.filePath, i));
+          if (partFile.exists()) {
+            partFile.delete();
+          }
+        }
+      }
+      record.deleteData();
+    }
+
+    if (file.exists() && removeFile) {
+      file.delete();
+    }
+    //下载任务实体和下载实体为一对一关系，下载实体删除，任务实体自动删除
+    if (type == 1) {
+      DbEntity.deleteData(DownloadEntity.class, "downloadPath=?", filePath);
+    } else {
+      DbEntity.deleteData(UploadEntity.class, "filePath=?", filePath);
+    }
+  }
+
+  /**
+   * 删除任务记录，默认删除文件
+   *
+   * @param filePath 文件路径
+   * @param type {@code 1}下载任务的记录，{@code 2} 上传任务的记录 {@code false}如果任务已经完成，只删除任务数据库记录
+   */
+  public static void delTaskRecord(String filePath, int type) {
+    delTaskRecord(filePath, type, false);
+  }
+
+  /**
+   * 获取CPU核心数
+   */
+  public static int getCoresNum() {
+    //Private Class to display only CPU devices in the directory listing
+    class CpuFilter implements FileFilter {
+      @Override public boolean accept(File pathname) {
+        //Check if filename is "cpu", followed by a single digit number
+        return Pattern.matches("cpu[0-9]", pathname.getName());
+      }
+    }
+
+    try {
+      //Get directory containing CPU info
+      File dir = new File("/sys/devices/system/cpu/");
+      //Filter to only list the devices we care about
+      File[] files = dir.listFiles(new CpuFilter());
+      ALog.d(TAG, "CPU Count: " + files.length);
+      //Return the number of cores (virtual CPU devices)
+      return files.length;
+    } catch (Exception e) {
+      //Print exception
+      ALog.d(TAG, "CPU Count: Failed.");
+      e.printStackTrace();
+      //Default to return 1 core
+      return 1;
+    }
+  }
+
+  /**
+   * 通过流创建文件
+   */
+  public static void createFileFormInputStream(InputStream is, String path) {
+    try {
+      FileOutputStream fos = new FileOutputStream(path);
+      byte[] buf = new byte[1024];
+      int len;
+      while ((len = is.read(buf)) > 0) {
+        fos.write(buf, 0, len);
+      }
+      is.close();
+      fos.flush();
+      fos.close();
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+  }
+
+  /**
+   * 校验文件MD5码
+   */
+  public static boolean checkMD5(String md5, File updateFile) {
+    if (TextUtils.isEmpty(md5) || updateFile == null) {
+      ALog.e(TAG, "MD5 string empty or updateFile null");
+      return false;
+    }
+
+    String calculatedDigest = getFileMD5(updateFile);
+    if (calculatedDigest == null) {
+      ALog.e(TAG, "calculatedDigest null");
+      return false;
+    }
+    return calculatedDigest.equalsIgnoreCase(md5);
+  }
+
+  /**
+   * 校验文件MD5码
+   */
+  public static boolean checkMD5(String md5, InputStream is) {
+    if (TextUtils.isEmpty(md5) || is == null) {
+      ALog.e(TAG, "MD5 string empty or updateFile null");
+      return false;
+    }
+
+    String calculatedDigest = getFileMD5(is);
+    if (calculatedDigest == null) {
+      ALog.e(TAG, "calculatedDigest null");
+      return false;
+    }
+    return calculatedDigest.equalsIgnoreCase(md5);
+  }
+
+  /**
+   * 获取文件MD5码
+   */
+  public static String getFileMD5(File updateFile) {
+    InputStream is;
+    try {
+      is = new FileInputStream(updateFile);
+    } catch (FileNotFoundException e) {
+      ALog.e(TAG, e);
+      return null;
+    }
+
+    return getFileMD5(is);
+  }
+
+  /**
+   * 获取文件MD5码
+   */
+  public static String getFileMD5(InputStream is) {
+    MessageDigest digest;
+    try {
+      digest = MessageDigest.getInstance("MD5");
+    } catch (NoSuchAlgorithmException e) {
+      ALog.e(TAG, e);
+      return null;
+    }
+
+    byte[] buffer = new byte[8192];
+    int read;
+    try {
+      while ((read = is.read(buffer)) > 0) {
+        digest.update(buffer, 0, read);
+      }
+      byte[] md5sum = digest.digest();
+      BigInteger bigInt = new BigInteger(1, md5sum);
+      String output = bigInt.toString(16);
+      // Fill to 32 chars
+      output = String.format("%32s", output).replace(' ', '0');
+      return output;
+    } catch (IOException e) {
+      throw new RuntimeException("Unable to process file for MD5", e);
+    } finally {
+      try {
+        is.close();
+      } catch (IOException e) {
+        ALog.e(TAG, e);
+      }
+    }
+  }
+
+  /**
+   * 创建任务命令
+   *
+   * @param taskType {@link ICmd#TASK_TYPE_DOWNLOAD}、{@link ICmd#TASK_TYPE_DOWNLOAD_GROUP}、{@link
+   * ICmd#TASK_TYPE_UPLOAD}
+   */
+  public static <T extends AbsTaskWrapper> AbsNormalCmd createNormalCmd(T entity, int cmd,
+      int taskType) {
+    return NormalCmdFactory.getInstance().createCmd(entity, cmd, taskType);
+  }
+
+  /**
+   * 创建任务组命令
+   *
+   * @param childUrl 子任务url
+   */
+  public static <T extends AbsGroupTaskWrapper> AbsGroupCmd createGroupCmd(String target, T entity,
+      int cmd, String childUrl) {
+    return GroupCmdFactory.getInstance().createCmd(target, entity, cmd, childUrl);
+  }
+
+  /**
+   * 创建隐性的Intent
+   */
+  public static Intent createIntent(String packageName, String action) {
+    Uri.Builder builder = new Uri.Builder();
+    builder.scheme(packageName);
+    Uri uri = builder.build();
+    Intent intent = new Intent(action);
+    intent.setData(uri);
+    return intent;
+  }
+
+  /**
+   * 存储字符串到配置文件
+   *
+   * @param preName 配置文件名
+   * @param key 存储的键值
+   * @param value 需要存储的字符串
+   * @return 成功标志
+   */
+  public static Boolean putString(String preName, Context context, String key, String value) {
+    SharedPreferences pre = context.getSharedPreferences(preName, Context.MODE_PRIVATE);
+    SharedPreferences.Editor editor = pre.edit();
+    editor.putString(key, value);
+    return editor.commit();
+  }
+
+  /**
+   * 从配置文件读取字符串
+   *
+   * @param preName 配置文件名
+   * @param key 字符串键值
+   * @return 键值对应的字符串, 默认返回""
+   */
+  public static String getString(String preName, Context context, String key) {
+    SharedPreferences pre = context.getSharedPreferences(preName, Context.MODE_PRIVATE);
+    return pre.getString(key, "");
+  }
+
+  /**
+   * 获取所有字段，包括父类的字段
+   */
+  public static List<Field> getAllFields(Class clazz) {
+    List<Field> fields = new ArrayList<>();
+    Class personClazz = clazz.getSuperclass();
+    if (personClazz != null) {
+      Class rootClazz = personClazz.getSuperclass();
+      if (rootClazz != null) {
+        Collections.addAll(fields, rootClazz.getDeclaredFields());
+      }
+      Collections.addAll(fields, personClazz.getDeclaredFields());
+    }
+    Collections.addAll(fields, clazz.getDeclaredFields());
+    return fields;
+  }
+
+  /**
+   * 获取当前类里面的所在字段
+   */
+  public static Field[] getFields(Class clazz) {
+    Field[] fields = null;
+    fields = clazz.getDeclaredFields();
+    if (fields == null || fields.length == 0) {
+      Class superClazz = clazz.getSuperclass();
+      if (superClazz != null) {
+        fields = getFields(superClazz);
+      }
+    }
+    return fields;
+  }
+
+  /**
+   * 获取类里面的指定对象，如果该类没有则从父类查询
+   */
+  public static Field getField(Class clazz, String name) {
+    Field field = null;
+    try {
+      field = clazz.getDeclaredField(name);
+    } catch (NoSuchFieldException e) {
+      try {
+        field = clazz.getField(name);
+      } catch (NoSuchFieldException e1) {
+        if (clazz.getSuperclass() == null) {
+          return field;
+        } else {
+          field = getField(clazz.getSuperclass(), name);
+        }
+      }
+    }
+    if (field != null) {
+      field.setAccessible(true);
+    }
+    return field;
+  }
+
+  /**
+   * 字符串转hashcode
+   */
+  public static int keyToHashCode(String str) {
+    int total = 0;
+    for (int i = 0; i < str.length(); i++) {
+      char ch = str.charAt(i);
+      if (ch == '-') ch = (char) 28; // does not contain the same last 5 bits as any letter
+      if (ch == '\'') ch = (char) 29; // nor this
+      total = (total * 33) + (ch & 0x1F);
+    }
+    return total;
+  }
+
+  /**
+   * 将key转换为16进制码
+   *
+   * @param key 缓存的key
+   * @return 转换后的key的值, 系统便是通过该key来读写缓存
+   */
+  public static String keyToHashKey(String key) {
+    String cacheKey;
+    try {
+      final MessageDigest mDigest = MessageDigest.getInstance("MD5");
+      mDigest.update(key.getBytes());
+      cacheKey = bytesToHexString(mDigest.digest());
+    } catch (NoSuchAlgorithmException e) {
+      cacheKey = String.valueOf(key.hashCode());
+    }
+    return cacheKey;
+  }
+
+  /**
+   * 将普通字符串转换为16位进制字符串
+   */
+  public static String bytesToHexString(byte[] src) {
+    StringBuilder stringBuilder = new StringBuilder("0x");
+    if (src == null || src.length <= 0) {
+      return null;
+    }
+    char[] buffer = new char[2];
+    for (byte aSrc : src) {
+      buffer[0] = Character.forDigit((aSrc >>> 4) & 0x0F, 16);
+      buffer[1] = Character.forDigit(aSrc & 0x0F, 16);
+      stringBuilder.append(buffer);
+    }
+    return stringBuilder.toString();
+  }
+
+  /**
+   * 获取对象名
+   *
+   * @param obj 对象
+   * @return 对象名
+   */
+  public static String getClassName(Object obj) {
+    String arrays[] = obj.getClass().getName().split("\\.");
+    return arrays[arrays.length - 1];
+  }
+
+  /**
+   * 获取对象名
+   *
+   * @param clazz clazz
+   * @return 对象名
+   */
+  public static String getClassName(Class clazz) {
+    String arrays[] = clazz.getName().split("\\.");
+    return arrays[arrays.length - 1];
+  }
+
+  /**
+   * 格式化文件大小
+   *
+   * @param size file.length() 获取文件大小
+   */
+  public static String formatFileSize(double size) {
+    if (size < 0) {
+      return "0kb";
+    }
+    double kiloByte = size / 1024;
+    if (kiloByte < 1) {
+      return size + "b";
+    }
+
+    double megaByte = kiloByte / 1024;
+    if (megaByte < 1) {
+      BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
+      return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "kb";
+    }
+
+    double gigaByte = megaByte / 1024;
+    if (gigaByte < 1) {
+      BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
+      return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "mb";
+    }
+
+    double teraBytes = gigaByte / 1024;
+    if (teraBytes < 1) {
+      BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
+      return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "gb";
+    }
+    BigDecimal result4 = new BigDecimal(teraBytes);
+    return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "tb";
+  }
+
+  /**
+   * 创建目录 当目录不存在的时候创建文件，否则返回false
+   */
+  public static boolean createDir(String path) {
+    File file = new File(path);
+    if (!file.exists()) {
+      if (!file.mkdirs()) {
+        ALog.d(TAG, "创建失败，请检查路径和是否配置文件权限！");
+        return false;
+      }
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * 创建文件 当文件不存在的时候就创建一个文件。 如果文件存在，先删除原文件，然后重新创建一个新文件
+   *
+   * @return {@code true} 创建成功、{@code false} 创建失败
+   */
+  public static boolean createFile(String path) {
+    if (TextUtils.isEmpty(path)) {
+      ALog.e(TAG, "文件路径不能为null");
+      return false;
+    }
+    File file = new File(path);
+    if (file.getParentFile() == null || !file.getParentFile().exists()) {
+      ALog.d(TAG, "目标文件所在路径不存在，准备创建……");
+      if (!createDir(file.getParent())) {
+        ALog.d(TAG, "创建目录文件所在的目录失败！文件路径【" + path + "】");
+      }
+    }
+    // 创建目标文件
+    if (file.exists()) {
+      final File to = new File(file.getAbsolutePath() + System.currentTimeMillis());
+      if (file.renameTo(to)) {
+        to.delete();
+      } else {
+        file.delete();
+      }
+    }
+    try {
+      if (file.createNewFile()) {
+        ALog.d(TAG, "创建文件成功:" + file.getAbsolutePath());
+        return true;
+      }
+    } catch (IOException e) {
+      e.printStackTrace();
+      return false;
+    }
+    return false;
+  }
+
+  /**
+   * 通过文件名获取下载配置文件路径
+   *
+   * @param fileName 文件名
+   */
+  public static String getFileConfigPath(boolean isDownload, String fileName) {
+    return AriaManager.APP.getFilesDir().getPath() + (isDownload ? AriaManager.DOWNLOAD_TEMP_DIR
+        : AriaManager.UPLOAD_TEMP_DIR) + fileName + ".properties";
+  }
+
+  /**
+   * 修改任务路径，修改文件路径和任务记录信息。如果是分块任务，则修改分块文件的路径。
+   *
+   * @param oldPath 旧的文件路径
+   * @param newPath 新的文件路径
+   */
+  public static void modifyTaskRecord(String oldPath, String newPath) {
+    if (oldPath.equals(newPath)) {
+      ALog.w(TAG, "修改任务记录失败，新文件路径和旧文件路径一致");
+      return;
+    }
+    TaskRecord record = DbDataHelper.getTaskRecord(oldPath);
+    if (record == null) {
+      if (new File(oldPath).exists()) {
+        ALog.w(TAG, "修改任务记录失败，文件【" + oldPath + "】对应的任务记录不存在");
+      }
+      return;
+    }
+    if (!record.isBlock) {
+      File oldFile = new File(oldPath);
+      if (oldFile.exists()) {
+        oldFile.renameTo(new File(newPath));
+      }
+    }
+
+    record.filePath = newPath;
+    record.update();
+    // 修改线程记录
+    if (record.threadRecords != null && !record.threadRecords.isEmpty()) {
+      for (ThreadRecord tr : record.threadRecords) {
+        tr.key = newPath;
+        File blockFile = new File(String.format(AbsFileer.SUB_PATH, oldPath, tr.threadId));
+        if (blockFile.exists()) {
+          blockFile.renameTo(new File(String.format(AbsFileer.SUB_PATH, newPath, tr.threadId)));
+        }
+      }
+      DbEntity.saveAll(record.threadRecords);
+    }
+  }
+
+  /**
+   * 读取下载配置文件
+   */
+  public static Properties loadConfig(File file) {
+    Properties properties = new Properties();
+    FileInputStream fis = null;
+    if (!file.exists()) {
+      createFile(file.getPath());
+    }
+    try {
+      fis = new FileInputStream(file);
+      properties.load(fis);
+    } catch (Exception e) {
+      e.printStackTrace();
+    } finally {
+      try {
+        if (fis != null) {
+          fis.close();
+        }
+      } catch (IOException e) {
+        e.printStackTrace();
+      }
+    }
+    return properties;
+  }
+
+  /**
+   * 保存配置文件
+   */
+  public static void saveConfig(File file, Properties properties) {
+    FileOutputStream fos = null;
+    try {
+      fos = new FileOutputStream(file, false);
+      properties.store(fos, null);
+    } catch (Exception e) {
+      e.printStackTrace();
+    } finally {
+      try {
+        if (fos != null) {
+          fos.flush();
+          fos.close();
+        }
+      } catch (IOException e) {
+        e.printStackTrace();
+      }
+    }
+  }
 }
\ No newline at end of file
diff --git a/DEV_LOG.md b/DEV_LOG.md
index 15653872..ed590c27 100644
--- a/DEV_LOG.md
+++ b/DEV_LOG.md
@@ -11,6 +11,8 @@
     - 修复使用`Content-Disposition`的文件名时，第一次下载无法重命名文件的问题
     - 修复使用`Content-Disposition`的文件名时，多次重命名文件的问题
     - 组合任务新增`unknownSize()`，用于处理组合任务大小未知的情况，https://github.com/AriaLyy/Aria/issues/380
+    - 优化`AbsThreadTask`代码
+    - 新增文件长度处理功能 https://github.com/AriaLyy/Aria/issues/393
   + v_3.6.3 (2019/4/2)
     - fix bug https://github.com/AriaLyy/Aria/issues/377
   + v_3.6.2 (2019/4/1)
diff --git a/app/build.gradle b/app/build.gradle
index cad8130d..a2a0e16f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -55,6 +55,9 @@ dependencies {
   //  annotationProcessor 'com.arialyy.aria:aria-compiler:3.3.14'
   api 'com.github.PhilJay:MPAndroidChart:v3.0.3'
   implementation project(':AppFrame')
+  debugCompile 'com.squareup.leakcanary:leakcanary-android:1.5.4'
+  implementation 'com.github.bumptech.glide:glide:3.7.0'
+
 }
 repositories {
   mavenCentral()
diff --git a/app/src/main/java/com/arialyy/simple/base/BaseApplication.java b/app/src/main/java/com/arialyy/simple/base/BaseApplication.java
index 3295868e..6b094c01 100644
--- a/app/src/main/java/com/arialyy/simple/base/BaseApplication.java
+++ b/app/src/main/java/com/arialyy/simple/base/BaseApplication.java
@@ -24,6 +24,7 @@
 import com.arialyy.frame.core.AbsFrame;
 import com.arialyy.simple.BuildConfig;
 import com.arialyy.simple.common.ConnectionChangeReceiver;
+import com.squareup.leakcanary.LeakCanary;
 
 /**
  * Created by Lyy on 2016/9/27.
@@ -44,12 +45,20 @@ public class BaseApplication extends Application {
           .build());
       StrictMode.setThreadPolicy(
           new StrictMode.ThreadPolicy.Builder().detectAll().penaltyLog().build());
-    }
-
-    registerReceiver(new ConnectionChangeReceiver(),
-        new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
+      if (LeakCanary.isInAnalyzerProcess(this)) {//1
+        // This process is dedicated to LeakCanary for heap analysis.
+        // You should not init your app in this process.
+        return;
+      }
+      LeakCanary.install(this);
   }
 
+  registerReceiver(new ConnectionChangeReceiver(),
+        new
+
+  IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
+}
+
   public static BaseApplication getApp() {
     return INSTANCE;
   }
diff --git a/app/src/main/java/com/arialyy/simple/core/download/SingleTaskActivity.java b/app/src/main/java/com/arialyy/simple/core/download/SingleTaskActivity.java
index ed4a407a..2a93f2e7 100644
--- a/app/src/main/java/com/arialyy/simple/core/download/SingleTaskActivity.java
+++ b/app/src/main/java/com/arialyy/simple/core/download/SingleTaskActivity.java
@@ -21,6 +21,7 @@
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Environment;
+import android.text.TextUtils;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -36,6 +37,7 @@
 import com.arialyy.aria.core.download.DownloadTarget;
 import com.arialyy.aria.core.download.DownloadTask;
 import com.arialyy.aria.core.inf.IEntity;
+import com.arialyy.aria.core.inf.IHttpFileLenAdapter;
 import com.arialyy.aria.core.scheduler.ISchedulers;
 import com.arialyy.aria.util.ALog;
 import com.arialyy.aria.util.CommonUtil;
@@ -58,8 +60,8 @@ public class SingleTaskActivity extends BaseActivity<ActivitySingleBinding> {
       //"http://static.gaoshouyou.com/d/22/94/822260b849944492caadd2983f9bb624.apks";
       //"http://120.55.95.61:8811/ghcg/zg/武义总规纲要成果.zip";
       //"https://yizi-kejian.oss-cn-beijing.aliyuncs.com/qimeng/package1/qmtable11.zip";
-      //"http://rs.0.gaoshouyou.com/d/04/1e/400423a7551e1f3f0eb1812afa1f9b44.apk";
-      "http://chargepile2.techsum.net/car-manage/file/download?path=2019-04-26/c0242efd18be4ecbb23911b1c509dcad--掌通各系统汇总.xls"; // 无长度的chunked
+      "http://rs.0.gaoshouyou.com/d/04/1e/400423a7551e1f3f0eb1812afa1f9b44.apk";
+  //"http://chargepile2.techsum.net/car-manage/file/download?path=2019-04-26/c0242efd18be4ecbb23911b1c509dcad--掌通各系统汇总.xls"; // 无长度的chunked
   //"http://58.210.9.131/tpk/sipgt//TDLYZTGH.tpk"; //chunked 下载
   //"http://apk500.bce.baidu-mgame.com/game/67000/67734/20170622040827_oem_5502845.apk?r=1";
   //"https://dl.genymotion.com/releases/genymotion-2.12.1/genymotion-2.12.1-vbox.exe";
@@ -262,8 +264,8 @@ void taskComplete(DownloadTask task) {
     L.d(TAG, "path = " + task.getDownloadEntity().getDownloadPath());
     L.d(TAG, "md5Code = " + CommonUtil.getFileMD5(new File(task.getDownloadPath())));
     L.d(TAG, "data = " + Aria.download(this).getDownloadEntity(DOWNLOAD_URL));
-    DownloadEntity temp = Aria.download(this).getDownloadEntity(DOWNLOAD_URL);
-    L.d(TAG, "status = " + temp.getState() + ", isComplete = " + temp.isComplete());
+    //DownloadEntity temp = Aria.download(this).getDownloadEntity(DOWNLOAD_URL);
+    //L.d(TAG, "status = " + temp.getState() + ", isComplete = " + temp.isComplete());
     //Intent install = new Intent(Intent.ACTION_VIEW);
     //install.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
     //File apkFile = new File(task.getDownloadPath());
@@ -289,15 +291,9 @@ public void onClick(View view) {
     switch (view.getId()) {
       case R.id.start:
         startD();
-        //List<DownloadEntity> list = Aria.download(this).getAllNotCompleteTask(5, 2);
-        //ALog.d("Tag", list.size() + "");
         break;
       case R.id.stop:
         Aria.download(this).load(DOWNLOAD_URL).stop();
-        //startActivity(new Intent(this, SingleTaskActivity.class));
-        //Aria.download(this).unRegister();
-        //Aria.download(this).load(DOWNLOAD_URL).removeRecord();
-        //Log.d(TAG, Aria.download(this).taskExists(DOWNLOAD_URL) + "");
         break;
       case R.id.cancel:
         Aria.download(this).load(DOWNLOAD_URL).cancel(true);
@@ -310,9 +306,6 @@ public void onClick(View view) {
 
   private void startD() {
     String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/ggsg14.apk";
-    //Map<String, String> params = new HashMap<>();
-    //params.put("key", "value");
-    //params.put("filename", "CentOS-7-x86_64-Minimal-1804.iso");
     Aria.download(SingleTaskActivity.this)
         .load(DOWNLOAD_URL)
         //.addHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3")
@@ -321,6 +314,18 @@ private void startD() {
         //.addHeader("Cookie", "BAIDUID=648E5FF020CC69E8DD6F492D1068AAA9:FG=1; BIDUPSID=648E5FF020CC69E8DD6F492D1068AAA9; PSTM=1519099573; BD_UPN=12314753; locale=zh; BDSVRTM=0")
         .useServerFileName(true)
         .setFilePath(path, true)
+        .setFileLenAdapter(new IHttpFileLenAdapter() {
+          @Override public long handleFileLen(Map<String, List<String>> headers) {
+
+            List<String> sLength = headers.get("Content-Length");
+            if (sLength == null || sLength.isEmpty()) {
+              return -1;
+            }
+            String temp = sLength.get(0);
+
+            return Long.parseLong(temp);
+          }
+        })
         //.asGet()
         //.asPost()
         //.setParams(params)
diff --git a/app/src/main/java/com/arialyy/simple/core/download/group/DownloadGroupActivity.java b/app/src/main/java/com/arialyy/simple/core/download/group/DownloadGroupActivity.java
index 8ff0b7da..3e7bbd1a 100644
--- a/app/src/main/java/com/arialyy/simple/core/download/group/DownloadGroupActivity.java
+++ b/app/src/main/java/com/arialyy/simple/core/download/group/DownloadGroupActivity.java
@@ -24,6 +24,8 @@
 import com.arialyy.aria.core.download.DownloadEntity;
 import com.arialyy.aria.core.download.DownloadGroupEntity;
 import com.arialyy.aria.core.download.DownloadGroupTask;
+import com.arialyy.aria.core.inf.AbsHttpFileLenAdapter;
+import com.arialyy.aria.core.inf.IHttpFileLenAdapter;
 import com.arialyy.frame.util.show.L;
 import com.arialyy.frame.util.show.T;
 import com.arialyy.simple.R;
@@ -31,6 +33,7 @@
 import com.arialyy.simple.databinding.ActivityDownloadGroupBinding;
 import com.arialyy.simple.widget.SubStateLinearLayout;
 import java.util.List;
+import java.util.Map;
 
 /**
  * Created by lyy on 2017/7/6.
@@ -87,6 +90,18 @@ public void onClick(View view) {
             //.setSubFileName(getModule(GroupModule.class).getSubName2())
             .setSubFileName(getModule(GroupModule.class).getSubName())
             .unknownSize()
+            .setFileLenAdapter(new AbsHttpFileLenAdapter() {
+              @Override public long handleFileLen(Map<String, List<String>> headers) {
+
+                List<String> sLength = headers.get("Content-Length");
+                if (sLength == null || sLength.isEmpty()) {
+                  return -1;
+                }
+                String temp = sLength.get(0);
+
+                return Long.parseLong(temp);
+              }
+            })
             //.setFileSize(114981416)
             //.updateUrls(temp)
             .start();