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package cn.trinea.android.common.util;
import java.lang.reflect.Method;
import android.app.DownloadManager;
import android.app.DownloadManager.Request;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
/**
* DownloadManagerPro
* <ul>
* <strong>Get download info</strong>
* <li>{@link #getStatusById(long)} get download status</li>
* <li>{@link #getDownloadBytes(long)} get downloaded byte, total byte</li>
* <li>{@link #getBytesAndStatus(long)} get downloaded byte, total byte and download status</li>
* <li>{@link #getFileName(long)} get download file name</li>
* <li>{@link #getUri(long)} get download uri</li>
* <li>{@link #getReason(long)} get failed code or paused reason</li>
* <li>{@link #getPausedReason(long)} get paused reason</li>
* <li>{@link #getErrorCode(long)} get failed error code</li>
* </ul>
* <ul>
* <strong>Operate download</strong>
* <li>{@link #isExistPauseAndResumeMethod()} whether exist pauseDownload and resumeDownload method in
* {@link DownloadManager}</li>
* <li>{@link #pauseDownload(long...)} pause download. need pauseDownload(long...) method in {@link DownloadManager}</li>
* <li>{@link #resumeDownload(long...)} resume download. need resumeDownload(long...) method in {@link DownloadManager}</li>
* </ul>
* <ul>
* <strong>RequestPro</strong>
* <li>{@link RequestPro#setNotiClass(String)} set noti class</li>
* <li>{@link RequestPro#setNotiExtras(String)} set noti extras</li>
* </ul>
*
* @author <a href="http://www.trinea.cn" target="_blank">Trinea</a> 2013-5-4
*/
public class DownloadManagerPro {
public static final Uri CONTENT_URI = Uri.parse("content://downloads/my_downloads");
/** represents downloaded file above api 11 **/
public static final String COLUMN_LOCAL_FILENAME = "local_filename";
/** represents downloaded file below api 11 **/
public static final String COLUMN_LOCAL_URI = "local_uri";
public static final String METHOD_NAME_PAUSE_DOWNLOAD = "pauseDownload";
public static final String METHOD_NAME_RESUME_DOWNLOAD = "resumeDownload";
private static boolean isInitPauseDownload = false;
private static boolean isInitResumeDownload = false;
private static Method pauseDownload = null;
private static Method resumeDownload = null;
private DownloadManager downloadManager;
public DownloadManagerPro(DownloadManager downloadManager) {
this.downloadManager = downloadManager;
}
/**
* get download status
*
* @param downloadId
* @return
*/
public int getStatusById(long downloadId) {
return getInt(downloadId, DownloadManager.COLUMN_STATUS);
}
/**
* get downloaded byte, total byte
*
* @param downloadId
* @return a int array with two elements
* <ul>
* <li>result[0] represents downloaded bytes, This will initially be -1.</li>
* <li>result[1] represents total bytes, This will initially be -1.</li>
* </ul>
*/
public int[] getDownloadBytes(long downloadId) {
int[] bytesAndStatus = getBytesAndStatus(downloadId);
return new int[] {bytesAndStatus[0], bytesAndStatus[1]};
}
/**
* get downloaded byte, total byte and download status
*
* @param downloadId
* @return a int array with three elements
* <ul>
* <li>result[0] represents downloaded bytes, This will initially be -1.</li>
* <li>result[1] represents total bytes, This will initially be -1.</li>
* <li>result[2] represents download status, This will initially be 0.</li>
* </ul>
*/
public int[] getBytesAndStatus(long downloadId) {
int[] bytesAndStatus = new int[] {-1, -1, 0};
DownloadManager.Query query = new DownloadManager.Query().setFilterById(downloadId);
Cursor c = null;
try {
c = downloadManager.query(query);
if (c != null && c.moveToFirst()) {
bytesAndStatus[0] = c.getInt(c.getColumnIndexOrThrow(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
bytesAndStatus[1] = c.getInt(c.getColumnIndexOrThrow(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
bytesAndStatus[2] = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
}
} finally {
if (c != null) {
c.close();
}
}
return bytesAndStatus;
}
/**
* pause download
*
* @param ids the IDs of the downloads to be paused
* @return the number of downloads actually paused, -1 if exception or method not exist
*/
public int pauseDownload(long... ids) {
initPauseMethod();
if (pauseDownload == null) {
return -1;
}
try {
return ((Integer)pauseDownload.invoke(downloadManager, ids)).intValue();
} catch (Exception e) {
/**
* accept all exception, include ClassNotFoundException, NoSuchMethodException, InvocationTargetException,
* NullPointException
*/
e.printStackTrace();
}
return -1;
}
/**
* resume download
*
* @param ids the IDs of the downloads to be resumed
* @return the number of downloads actually resumed, -1 if exception or method not exist
*/
public int resumeDownload(long... ids) {
initResumeMethod();
if (resumeDownload == null) {
return -1;
}
try {
return ((Integer)resumeDownload.invoke(downloadManager, ids)).intValue();
} catch (Exception e) {
/**
* accept all exception, include ClassNotFoundException, NoSuchMethodException, InvocationTargetException,
* NullPointException
*/
e.printStackTrace();
}
return -1;
}
/**
* whether exist pauseDownload and resumeDownload method in {@link DownloadManager}
*
* @return
*/
public static boolean isExistPauseAndResumeMethod() {
initPauseMethod();
initResumeMethod();
return pauseDownload != null && resumeDownload != null;
}
private static void initPauseMethod() {
if (isInitPauseDownload) {
return;
}
isInitPauseDownload = true;
try {
pauseDownload = DownloadManager.class.getMethod(METHOD_NAME_PAUSE_DOWNLOAD, long[].class);
} catch (Exception e) {
// accept all exception
e.printStackTrace();
}
}
private static void initResumeMethod() {
if (isInitResumeDownload) {
return;
}
isInitResumeDownload = true;
try {
resumeDownload = DownloadManager.class.getMethod(METHOD_NAME_RESUME_DOWNLOAD, long[].class);
} catch (Exception e) {
// accept all exception
e.printStackTrace();
}
}
/**
* get download file name
*
* @param downloadId
* @return
*/
public String getFileName(long downloadId) {
return getString(downloadId, (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB ? COLUMN_LOCAL_URI
: COLUMN_LOCAL_FILENAME));
}
/**
* get download uri
*
* @param downloadId
* @return
*/
public String getUri(long downloadId) {
return getString(downloadId, DownloadManager.COLUMN_URI);
}
/**
* get failed code or paused reason
*
* @param downloadId
* @return <ul>
* <li>if status of downloadId is {@link DownloadManager#STATUS_PAUSED}, return
* {@link #getPausedReason(long)}</li>
* <li>if status of downloadId is {@link DownloadManager#STATUS_FAILED}, return {@link #getErrorCode(long)}</li>
* <li>if status of downloadId is neither {@link DownloadManager#STATUS_PAUSED} nor
* {@link DownloadManager#STATUS_FAILED}, return 0</li>
* </ul>
*/
public int getReason(long downloadId) {
return getInt(downloadId, DownloadManager.COLUMN_REASON);
}
/**
* get paused reason
*
* @param downloadId
* @return <ul>
* <li>if status of downloadId is {@link DownloadManager#STATUS_PAUSED}, return one of
* {@link DownloadManager#PAUSED_WAITING_TO_RETRY}<br/>
* {@link DownloadManager#PAUSED_WAITING_FOR_NETWORK}<br/>
* {@link DownloadManager#PAUSED_QUEUED_FOR_WIFI}<br/>
* {@link DownloadManager#PAUSED_UNKNOWN}</li>
* <li>else return {@link DownloadManager#PAUSED_UNKNOWN}</li>
* </ul>
*/
public int getPausedReason(long downloadId) {
return getInt(downloadId, DownloadManager.COLUMN_REASON);
}
/**
* get failed error code
*
* @param downloadId
* @return one of {@link DownloadManager#ERROR_*}
*/
public int getErrorCode(long downloadId) {
return getInt(downloadId, DownloadManager.COLUMN_REASON);
}
public static class RequestPro extends DownloadManager.Request {
public static final String METHOD_NAME_SET_NOTI_CLASS = "setNotiClass";
public static final String METHOD_NAME_SET_NOTI_EXTRAS = "setNotiExtras";
private static boolean isInitNotiClass = false;
private static boolean isInitNotiExtras = false;
private static Method setNotiClass = null;
private static Method setNotiExtras = null;
/**
* @param uri the HTTP URI to download.
*/
public RequestPro(Uri uri) {
super(uri);
}
/**
* set noti class, only init once
*
* @param className full class name
*/
public void setNotiClass(String className) {
synchronized (this) {
if (!isInitNotiClass) {
isInitNotiClass = true;
try {
setNotiClass = Request.class.getMethod(METHOD_NAME_SET_NOTI_CLASS, CharSequence.class);
} catch (Exception e) {
// accept all exception
e.printStackTrace();
}
}
}
if (setNotiClass != null) {
try {
setNotiClass.invoke(this, className);
} catch (Exception e) {
/**
* accept all exception, include ClassNotFoundException, NoSuchMethodException,
* InvocationTargetException, NullPointException
*/
e.printStackTrace();
}
}
}
/**
* set noti extras, only init once
*
* @param extras
*/
public void setNotiExtras(String extras) {
synchronized (this) {
if (!isInitNotiExtras) {
isInitNotiExtras = true;
try {
setNotiExtras = Request.class.getMethod(METHOD_NAME_SET_NOTI_EXTRAS, CharSequence.class);
} catch (Exception e) {
// accept all exception
e.printStackTrace();
}
}
}
if (setNotiExtras != null) {
try {
setNotiExtras.invoke(this, extras);
} catch (Exception e) {
/**
* accept all exception, include ClassNotFoundException, NoSuchMethodException,
* InvocationTargetException, NullPointException
*/
e.printStackTrace();
}
}
}
}
/**
* get string column
*
* @param downloadId
* @param columnName
* @return
*/
private String getString(long downloadId, String columnName) {
DownloadManager.Query query = new DownloadManager.Query().setFilterById(downloadId);
String result = null;
Cursor c = null;
try {
c = downloadManager.query(query);
if (c != null && c.moveToFirst()) {
result = c.getString(c.getColumnIndex(columnName));
}
} finally {
if (c != null) {
c.close();
}
}
return result;
}
/**
* get int column
*
* @param downloadId
* @param columnName
* @return
*/
private int getInt(long downloadId, String columnName) {
DownloadManager.Query query = new DownloadManager.Query().setFilterById(downloadId);
int result = -1;
Cursor c = null;
try {
c = downloadManager.query(query);
if (c != null && c.moveToFirst()) {
result = c.getInt(c.getColumnIndex(columnName));
}
} finally {
if (c != null) {
c.close();
}
}
return result;
}
}