fdroidclient / F-Droid / src / org / fdroid / fdroid / net / AsyncDownloaderFromAndroid.java @ a09587c7
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package org.fdroid.fdroid.net; |
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import android.annotation.TargetApi; |
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import android.app.DownloadManager; |
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import android.content.BroadcastReceiver; |
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import android.content.Context; |
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import android.content.Intent; |
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import android.content.IntentFilter; |
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import android.database.Cursor; |
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import android.net.Uri; |
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import android.os.Build; |
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import android.os.ParcelFileDescriptor; |
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import android.text.TextUtils; |
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import android.util.Log; |
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import org.fdroid.fdroid.Utils; |
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import java.io.File; |
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import java.io.FileDescriptor; |
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import java.io.FileInputStream; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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/**
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* A downloader that uses Android's DownloadManager to perform a download.
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*/
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@TargetApi(Build.VERSION_CODES.GINGERBREAD)
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public class AsyncDownloaderFromAndroid implements AsyncDownloader { |
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private final Context context; |
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private final DownloadManager dm; |
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private File localFile; |
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private String remoteAddress; |
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private String downloadTitle; |
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private String uniqueDownloadId; |
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private Listener listener;
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private long downloadManagerId = -1; |
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/**
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* Normally the listener would be provided using a setListener method.
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* However for the purposes of this async downloader, it doesn't make
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* sense to have an async task without any way to notify the outside
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* world about completion. Therefore, we require the listener as a
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* parameter to the constructor.
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*/
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public AsyncDownloaderFromAndroid(Context context, Listener listener, String downloadTitle, String downloadId, String remoteAddress, File localFile) { |
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this.context = context;
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this.downloadTitle = downloadTitle;
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this.uniqueDownloadId = downloadId;
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this.remoteAddress = remoteAddress;
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this.listener = listener;
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this.localFile = localFile;
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if (TextUtils.isEmpty(downloadTitle)) {
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this.downloadTitle = remoteAddress;
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} |
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dm = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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} |
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@Override
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public void download() { |
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// Check if the download is complete
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if ((downloadManagerId = isDownloadComplete(context, uniqueDownloadId)) > 0) { |
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// clear the notification
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dm.remove(downloadManagerId); |
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try {
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// write the downloaded file to the expected location
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ParcelFileDescriptor fd = dm.openDownloadedFile(downloadManagerId); |
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copyFile(fd.getFileDescriptor(), localFile); |
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listener.onDownloadComplete(); |
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} catch (IOException e) { |
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listener.onErrorDownloading(e.getLocalizedMessage()); |
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} |
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return;
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} |
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// Check if the download is still in progress
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if (downloadManagerId < 0) { |
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downloadManagerId = isDownloading(context, uniqueDownloadId); |
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} |
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// Start a new download
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if (downloadManagerId < 0) { |
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// set up download request
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DownloadManager.Request request = new DownloadManager.Request(Uri.parse(remoteAddress));
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request.setTitle(downloadTitle); |
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request.setDescription(uniqueDownloadId); // we will retrieve this later from the description field
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this.downloadManagerId = dm.enqueue(request);
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} |
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context.registerReceiver(receiver, |
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new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
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} |
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/**
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* Copy input file to output file
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* @throws IOException
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*/
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private void copyFile(FileDescriptor inputFile, File outputFile) throws IOException { |
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InputStream input = null; |
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OutputStream output = null; |
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try {
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input = new FileInputStream(inputFile); |
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output = new FileOutputStream(outputFile); |
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Utils.copy(input, output); |
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} finally {
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Utils.closeQuietly(output); |
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Utils.closeQuietly(input); |
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} |
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} |
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@Override
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public int getBytesRead() { |
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if (downloadManagerId < 0) return 0; |
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DownloadManager.Query query = new DownloadManager.Query();
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query.setFilterById(downloadManagerId); |
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Cursor c = dm.query(query);
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try {
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if (c.moveToFirst()) {
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// we use the description column to store the unique id of this download
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int columnIndex = c.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR);
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return c.getInt(columnIndex);
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} |
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} finally {
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c.close(); |
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} |
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return 0; |
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} |
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@Override
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public int getTotalBytes() { |
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if (downloadManagerId < 0) return 0; |
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DownloadManager.Query query = new DownloadManager.Query();
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query.setFilterById(downloadManagerId); |
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Cursor c = dm.query(query);
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try {
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if (c.moveToFirst()) {
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// we use the description column to store the unique id for this download
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int columnIndex = c.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES);
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return c.getInt(columnIndex);
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} |
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} finally {
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c.close(); |
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} |
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return 0; |
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} |
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@Override
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public void attemptCancel(boolean userRequested) { |
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try {
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context.unregisterReceiver(receiver); |
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} catch (Exception e) { |
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// ignore if receiver already unregistered
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} |
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if (userRequested && downloadManagerId >= 0) { |
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dm.remove(downloadManagerId); |
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} |
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} |
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/**
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* Extract the uniqueDownloadId from a given download id.
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* @return - uniqueDownloadId or null if not found
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*/
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public static String getDownloadId(Context context, long downloadId) { |
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DownloadManager dm = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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DownloadManager.Query query = new DownloadManager.Query();
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query.setFilterById(downloadId); |
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Cursor c = dm.query(query);
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try {
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if (c.moveToFirst()) {
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// we use the description column to store the unique id for this download
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int columnIndex = c.getColumnIndex(DownloadManager.COLUMN_DESCRIPTION);
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return c.getString(columnIndex);
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} |
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} finally {
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c.close(); |
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} |
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return null; |
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} |
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/**
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* Extract the download title from a given download id.
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* @return - title or null if not found
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*/
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public static String getDownloadTitle(Context context, long downloadId) { |
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DownloadManager dm = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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DownloadManager.Query query = new DownloadManager.Query();
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query.setFilterById(downloadId); |
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Cursor c = dm.query(query);
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try {
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if (c.moveToFirst()) {
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int columnIndex = c.getColumnIndex(DownloadManager.COLUMN_TITLE);
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return c.getString(columnIndex);
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} |
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} finally {
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c.close(); |
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} |
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return null; |
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} |
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/**
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* Get the downloadManagerId from an Intent sent by the DownloadManagerReceiver
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*/
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public static long getDownloadId(Intent intent) { |
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if (intent != null) { |
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if (intent.hasExtra(DownloadManager.EXTRA_DOWNLOAD_ID)) {
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// we have been passed a DownloadManager download id, so get the unique id for that download
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return intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1); |
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} |
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if (intent.hasExtra(DownloadManager.EXTRA_NOTIFICATION_CLICK_DOWNLOAD_IDS)) {
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// we have been passed multiple download id's - just return the first one
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long[] downloadIds = intent.getLongArrayExtra(DownloadManager.EXTRA_NOTIFICATION_CLICK_DOWNLOAD_IDS); |
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if (downloadIds != null && downloadIds.length > 0) { |
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return downloadIds[0]; |
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} |
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} |
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} |
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return -1; |
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} |
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/**
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* Check if a download is running for the specified id
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* @return -1 if not downloading, else the id from the Android download manager
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*/
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public static long isDownloading(Context context, String uniqueDownloadId) { |
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DownloadManager dm = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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DownloadManager.Query query = new DownloadManager.Query();
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Cursor c = dm.query(query);
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int columnUniqueDownloadId = c.getColumnIndex(DownloadManager.COLUMN_DESCRIPTION);
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int columnId = c.getColumnIndex(DownloadManager.COLUMN_ID);
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try {
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while (c.moveToNext()) {
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if (uniqueDownloadId.equals(c.getString(columnUniqueDownloadId))) {
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return c.getLong(columnId);
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} |
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} |
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} finally {
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c.close(); |
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} |
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return -1; |
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} |
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/**
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* Check if a specific download is complete.
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* @return -1 if download is not complete, otherwise the download id
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*/
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public static long isDownloadComplete(Context context, String uniqueDownloadId) { |
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DownloadManager dm = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
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DownloadManager.Query query = new DownloadManager.Query();
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query.setFilterByStatus(DownloadManager.STATUS_SUCCESSFUL); |
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Cursor c = dm.query(query);
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int columnUniqueDownloadId = c.getColumnIndex(DownloadManager.COLUMN_DESCRIPTION);
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int columnId = c.getColumnIndex(DownloadManager.COLUMN_ID);
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try {
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while (c.moveToNext()) {
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if (uniqueDownloadId.equals(c.getString(columnUniqueDownloadId))) {
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return c.getLong(columnId);
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} |
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} |
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} finally {
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c.close(); |
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} |
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return -1; |
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} |
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/**
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* Broadcast receiver to listen for ACTION_DOWNLOAD_COMPLETE broadcasts
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*/
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BroadcastReceiver receiver = new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) { |
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if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(intent.getAction())) {
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long dId = getDownloadId(intent);
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String downloadId = getDownloadId(context, dId);
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if (listener != null && dId == AsyncDownloaderFromAndroid.this.downloadManagerId && downloadId != null) { |
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// our current download has just completed, so let's throw up install dialog
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// immediately
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try {
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context.unregisterReceiver(receiver); |
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} catch (Exception e) { |
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// ignore if receiver already unregistered
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} |
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// call download() to copy the file and start the installer
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download(); |
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} |
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} |
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} |
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}; |
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} |