init download

Android-Download/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild

Android-Download/and_download/.gitignore

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+/build

Android-Download/and_download/build.gradle

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+apply plugin: 'com.android.library'
+apply plugin: 'com.github.dcendents.android-maven'
+group='com.github.LightSun'
+
+android {
+    compileSdkVersion 28
+    buildToolsVersion "28.0.3"
+
+    defaultConfig {
+        minSdkVersion 19
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'com.heaven7.java.base:Java-base:1.2.0'
+}

Android-Download/and_download/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

Android-Download/and_download/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.heaven7.android.download" >
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+
+</manifest>

Android-Download/and_download/src/main/java/com/heaven7/android/download/DownloadHelper.java

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+package com.heaven7.android.download;
+
+import android.app.DownloadManager;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.database.Cursor;
+import android.net.Uri;
+
+import androidx.collection.LongSparseArray;
+
+import com.heaven7.java.base.util.Predicates;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * the download helper use the system download manager to download
+ * @author heaven7
+ */
+public final class DownloadHelper {
+
+    public final static int STATUS_PENDING = DownloadManager.STATUS_PENDING;
+    public final static int STATUS_RUNNING = DownloadManager.STATUS_RUNNING;
+    public final static int STATUS_PAUSED = DownloadManager.STATUS_PAUSED;
+    public final static int STATUS_SUCCESSFUL = DownloadManager.STATUS_SUCCESSFUL;
+    public final static int STATUS_FAILED = DownloadManager.STATUS_FAILED;
+
+    private final LongSparseArray<Params> mCallbacks = new LongSparseArray<>();
+    private final DownloadManager mDM;
+    private final Context mContext;
+
+    public DownloadHelper(Context context) {
+        this.mContext = context.getApplicationContext();
+        this.mDM = (DownloadManager) mContext.getSystemService(Context.DOWNLOAD_SERVICE);
+    }
+    public long download(DownloadTask task, IDownloadCallback callback) {
+        DownloadManager.Request request = new DownloadManager.Request(Uri.parse(task.getUrl()));
+        request.setDestinationUri(Uri.fromFile(new File(task.getSavePath())));
+
+        callback.onPreDownload(mContext,task, request);
+
+        long id = mDM.enqueue(request);
+        task.setId(id);
+        mCallbacks.put(id, new Params(task, callback));
+        return id;
+    }
+    public boolean cancel(long id){
+        mCallbacks.remove(id);
+        return mDM.remove(id) > 0;
+    }
+    public void removeCallback(long id){
+        mCallbacks.remove(id);
+    }
+    public void registerDownloadReceiver(){
+        IntentFilter filter = new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE);
+        filter.addAction(DownloadManager.ACTION_NOTIFICATION_CLICKED);
+        filter.addAction(DownloadManager.ACTION_VIEW_DOWNLOADS);
+        mContext.registerReceiver(mReceiver, filter);
+    }
+    public void unregisterDownloadReceiver(){
+        try {
+            mContext.unregisterReceiver(mReceiver);
+        }catch (Exception e){
+            //ignore
+        }
+    }
+    public List<Long> getDownloadIds(){
+        int size = mCallbacks.size();
+        if(size == 0){
+            return Collections.emptyList();
+        }
+        List<Long> keys = new ArrayList<>();
+        for (int i = 0 ; i < size ; i ++){
+            keys.add(mCallbacks.keyAt(i));
+        }
+        return keys;
+    }
+
+    public void queryAll() {
+        List<Long> list = getDownloadIds();
+        if(!Predicates.isEmpty(list)){
+            queryAll(list);
+        }
+    }
+
+    public void queryAll(List<Long> ids) {
+        for (Long id: ids){
+            if(!query(id, null)){
+                System.out.println("Download : >> query download failed. id = " + id);
+            }
+        }
+    }
+
+    public boolean query(long id, Integer downloadFlags){
+        return query(id, downloadFlags, true);
+    }
+    public DownloadTask queryAny(long id, Integer downloadFlags){
+        DownloadTask task = new DownloadTask();
+        task.setId(id);
+        if(query0(id, downloadFlags, task)){
+            return task;
+        }
+        return null;
+    }
+    private boolean query(long id, Integer downloadFlags, boolean callback){
+        Params params = mCallbacks.get(id);
+        if(params == null){
+            return false;
+        }
+        if(query0(id, downloadFlags, params.task)){
+            if(callback){
+                params.callback.onQueryResult(mContext,  params.task);
+            }
+            return true;
+        }
+        return false;
+    }
+    private boolean query0(long id, Integer downloadFlags, DownloadTask task){
+        DownloadManager.Query query = new DownloadManager.Query();
+        query.setFilterById(id);
+        if(downloadFlags != null){
+            query.setFilterByStatus(downloadFlags);
+        }
+        Cursor cursor = mDM.query(query);
+        try {
+            if (cursor.moveToFirst()) {
+                int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
+                long totalBytes = cursor.getLong(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
+                long alreadyBytes = cursor.getLong(cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
+                String reason = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_REASON));
+                long lastModifyTime = cursor.getLong(cursor.getColumnIndex(DownloadManager.COLUMN_LAST_MODIFIED_TIMESTAMP));
+                String uriStr = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
+
+                task.setTotalBytes(totalBytes);
+                task.setDownloadBytes(alreadyBytes);
+                task.setLastModifyTime(lastModifyTime);
+                task.setReason(reason);
+                task.setStatus(status);
+                task.setUri(Uri.parse(uriStr));
+                return true;
+            }
+        }finally {
+            cursor.close();
+        }
+        return false;
+    }
+    private void dispatchNotificationClicked(long id){
+        Params params = mCallbacks.get(id);
+        if(params == null){
+            return;
+        }
+        query(id, null, false);
+        params.callback.onNotificationClicked(mContext, params.task);
+    }
+    private void dispatchViewDownload(long id){
+        Params params = mCallbacks.get(id);
+        if(params == null){
+            return;
+        }
+        params.callback.startViewDownload(mContext, params.task);
+    }
+    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            long id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0);
+            if(DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(intent.getAction())){
+                query(id, null);
+            }else if(DownloadManager.ACTION_NOTIFICATION_CLICKED.equals(intent.getAction())){
+                long[] ids = intent.getLongArrayExtra(DownloadManager.EXTRA_NOTIFICATION_CLICK_DOWNLOAD_IDS);
+                if(ids != null){
+                    for (long lid : ids){
+                        dispatchNotificationClicked(lid);
+                    }
+                }else {
+                    dispatchNotificationClicked(id);
+                }
+            }else if(DownloadManager.ACTION_VIEW_DOWNLOADS.equals(intent.getAction())){
+                dispatchViewDownload(id);
+            }
+        }
+    };
+    private static class Params{
+        final DownloadTask task;
+        final IDownloadCallback callback;
+
+        Params(DownloadTask task, IDownloadCallback callback) {
+            this.task = task;
+            this.callback = callback;
+        }
+    }
+}

Android-Download/and_download/src/main/java/com/heaven7/android/download/DownloadQueryParameter.java

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+package com.heaven7.android.download;
+
+public class DownloadQueryParameter {
+
+    private long id;
+    private String name;
+    private int state;
+
+    public long getId() {
+        return id;
+    }
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getState() {
+        return state;
+    }
+    public void setState(int state) {
+        this.state = state;
+    }
+}

Android-Download/and_download/src/main/java/com/heaven7/android/download/DownloadTask.java

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+package com.heaven7.android.download;
+
+import android.net.Uri;
+
+public class DownloadTask {
+
+    private String url;
+    private String savePath;
+    private long id;
+
+    private long totalBytes;     // init is -1
+    private long downloadBytes;
+    private String mediaType;    // may be null
+    private String reason;
+    private long lastModifyTime; // in mills
+    private int status;           // download state
+    private Uri uri;
+
+    public Uri getUri() {
+        return uri;
+    }
+    public void setUri(Uri uri) {
+        this.uri = uri;
+    }
+
+    public int getStatus() {
+        return status;
+    }
+    public void setStatus(int status) {
+        this.status = status;
+    }
+
+    public long getLastModifyTime() {
+        return lastModifyTime;
+    }
+
+    public void setLastModifyTime(long lastModifyTime) {
+        this.lastModifyTime = lastModifyTime;
+    }
+
+    public String getReason() {
+        return reason;
+    }
+    public void setReason(String reason) {
+        this.reason = reason;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public String getSavePath() {
+        return savePath;
+    }
+    public void setSavePath(String savePath) {
+        this.savePath = savePath;
+    }
+
+    public long getId() {
+        return id;
+    }
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public long getTotalBytes() {
+        return totalBytes;
+    }
+
+    public void setTotalBytes(long totalBytes) {
+        this.totalBytes = totalBytes;
+    }
+
+    public long getDownloadBytes() {
+        return downloadBytes;
+    }
+
+    public void setDownloadBytes(long downloadBytes) {
+        this.downloadBytes = downloadBytes;
+    }
+
+    public String getMediaType() {
+        return mediaType;
+    }
+
+    public void setMediaType(String mediaType) {
+        this.mediaType = mediaType;
+    }
+}