Eclipse transfer, Made sure that DownloadObserver cancels when Activity

stops

AndroidManifest.xml

@@ -14,7 +14,7 @@
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/Theme.Sherlock.Light"
-        android:name=".PodcastApp">
+        android:name="de.podfetcher.PodcastApp">
         <activity
             android:label="@string/app_name"
             android:name="de.podfetcher.activity.PodfetcherActivity" >

src/de/podfetcher/activity/AddFeedActivity.java

@@ -21,16 +21,37 @@ import java.util.concurrent.Callable;
 public class AddFeedActivity extends SherlockActivity {
 	private static final String TAG = "AddFeedActivity";
 
+	private DownloadRequester requester;
+	
 	private EditText etxtFeedurl;
 	private Button butConfirm;
 	private Button butCancel;
+	private long downloadId;
 
 	
+	private DownloadObserver observer;
+	
+	private  ProgressDialog progDialog;
+	
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.addfeed);
 
+		requester = DownloadRequester.getInstance();
+		
+		createObserver();
+		progDialog = new ProgressDialog(this) {
+			@Override
+			public void onBackPressed() {
+				requester.cancelDownload(getContext(), downloadId);
+				observer.cancel(true);
+				createObserver();
+				dismiss();
+			}
+			
+		};
+		
 		etxtFeedurl = (EditText) findViewById(R.id.etxtFeedurl);
 		butConfirm = (Button) findViewById(R.id.butConfirm);
 		butCancel = (Button) findViewById(R.id.butCancel);
@@ -49,9 +70,30 @@ public class AddFeedActivity extends SherlockActivity {
 				finish();
 			}
 		});
+	}
 	
+	private void createObserver() {
+		observer = new DownloadObserver(this) {
+			@Override
+			protected void onPostExecute(Boolean result) {
+				progDialog.dismiss();
+				finish();
+			}
 
+			@Override
+			protected void onProgressUpdate(DownloadObserver.DownloadStatus... values) {
+				DownloadObserver.DownloadStatus progr = values[0];
+				progDialog.setMessage(getContext().getString(progr.getStatusMsg())
+						+ " (" + progr.getProgressPercent() + "%)");
+			}
+		};
+	}
 	
+	@Override
+	protected void onStop() {
+		super.onStop();
+		Log.d(TAG, "Stopping Activity");
+		observer.cancel(true);
 	}
 
 	private void addNewFeed() {
@@ -60,29 +102,13 @@ public class AddFeedActivity extends SherlockActivity {
 
 		if(url != null) {
 			Feed feed = new Feed(url);
-			DownloadRequester req = DownloadRequester.getInstance();
+			downloadId = requester.downloadFeed(this, feed);
-			req.downloadFeed(this, feed);
 			observeDownload(feed);
 		}
 	}
 
 	private void observeDownload(Feed feed) {
-		final ProgressDialog dialog = new ProgressDialog(this);
+		progDialog.show();
-		final DownloadObserver observer = new DownloadObserver(this) {
-			@Override
-			protected void onPostExecute(Boolean result) {
-				dialog.dismiss();
-				finish();
-			}
-
-			@Override
-			protected void onProgressUpdate(DownloadObserver.DownloadStatus... values) {
-				DownloadObserver.DownloadStatus progr = values[0];
-				dialog.setMessage(getContext().getString(progr.getStatusMsg())
-						+ " (" + progr.getProgressPercent() + "%)");
-			}
-		};
-		dialog.show();
 		observer.execute(feed);
 	}
 

src/de/podfetcher/activity/DownloadActivity.java

@@ -9,6 +9,7 @@ import de.podfetcher.feed.FeedFile;
 import com.actionbarsherlock.app.SherlockListActivity;
 
 import android.os.Bundle;
+import android.util.Log;
 
 public class DownloadActivity extends SherlockListActivity {
     private static final String TAG = "DownloadActivity"; 
@@ -26,6 +27,13 @@ public class DownloadActivity extends SherlockListActivity {
 
     }
     
+    @Override
+    protected void onStop()  {
+    	super.onStop();
+    	Log.d(TAG, "Stopping Activity");
+    	observer.cancel(true);
+    }
+
     private final DownloadObserver observer = new DownloadObserver(this) {
         @Override
         protected void onProgressUpdate(DownloadObserver.DownloadStatus... values) {

src/de/podfetcher/activity/ItemviewActivity.java

@@ -65,6 +65,13 @@ public class ItemviewActivity extends SherlockActivity {
 		});
 	}
 	
+	@Override
+	public void onStop() {
+		super.onStop();
+		Log.d(TAG, "Stopping Activity");
+		downloadObserver.cancel(true);
+	}
+
 	/** Extracts FeedItem object the activity is supposed to display */
 	private void extractFeeditem() {
 		long itemId = getIntent().getLongExtra(FeedItemlistActivity.EXTRA_SELECTED_FEEDITEM, -1);

src/de/podfetcher/service/DownloadObserver.java

@@ -61,7 +61,7 @@ public class DownloadObserver extends AsyncTask<FeedFile, DownloadObserver.Downl
         }
 
 
-		while(downloadsLeft()) {
+		while(downloadsLeft() && !isCancelled()) {
             for (DownloadStatus status : statusList) {
                 if (status.done == false) {
                     Cursor cursor = getDownloadCursor(status.feedfile);

src/de/podfetcher/storage/DownloadRequester.java

@@ -60,7 +60,7 @@ public class DownloadRequester {
 		return downloader;
 	}
 
-	private void download(Context context, ArrayList<FeedFile> type, FeedFile item, File dest, boolean visibleInUI) {
+	private long download(Context context, ArrayList<FeedFile> type, FeedFile item, File dest, boolean visibleInUI) {
 		Log.d(TAG, "Requesting download of url "+ item.getDownload_url());
 		type.add(item);
 		DownloadManager.Request request = new DownloadManager.Request(Uri.parse(item.getDownload_url()));
@@ -71,27 +71,33 @@ public class DownloadRequester {
 		// TODO Set Allowed Network Types
 		DownloadManager manager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
 		context.startService(new Intent(context, DownloadService.class));
-		item.setDownloadId(manager.enqueue(request));
+		long downloadId = manager.enqueue(request);
+		item.setDownloadId(downloadId);
 		item.setFile_url(dest.toString());
+		return downloadId;
 	}
-	public void downloadFeed(Context context, Feed feed) {
+	public long downloadFeed(Context context, Feed feed) {
-		download(context, feeds, feed, 
+		return download(context, feeds, feed, 
 				new File(getFeedfilePath(context), getFeedfileName(feed)),
 				true);
 	}
 
-	public void downloadImage(Context context, FeedImage image) {
+	public long downloadImage(Context context, FeedImage image) {
-		download(context, images, image, 
+		return download(context, images, image, 
 				new File(getImagefilePath(context), getImagefileName(image)),
 				true);
 	}
 
-	public void downloadMedia(Context context, FeedMedia feedmedia) {
+	public long downloadMedia(Context context, FeedMedia feedmedia) {
-		download(context, media, feedmedia,
+		return download(context, media, feedmedia,
 				new File(getMediafilePath(context, feedmedia), getMediafilename(feedmedia)),
 				true);
 	}
 	
+	/** Cancels a running download. 
+	 * 	@param context A context needed to get the DownloadManager service
+	 * 	@param id ID of the download to cancel
+	 * */
 	public void cancelDownload(final Context context, final long id) {
 		Log.d(TAG, "Cancelling download with id " + id);
 		DownloadManager manager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);