Improvements to download requester

src/de/podfetcher/service/DownloadService.java

@@ -14,9 +14,11 @@ import java.util.concurrent.TimeUnit;
 import de.podfetcher.activity.DownloadActivity;
 import de.podfetcher.activity.MediaplayerActivity;
 import de.podfetcher.feed.*;
+import de.podfetcher.service.PlaybackService.LocalBinder;
 import de.podfetcher.storage.DownloadRequester;
 import de.podfetcher.syndication.handler.FeedHandler;
 import android.R;
+import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.app.Service;
 import android.app.DownloadManager;
@@ -31,6 +33,7 @@ import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.support.v4.app.NotificationCompat;
 import android.util.Log;
+import android.os.Binder;
 import android.os.Handler;
 import android.os.Message;
 import android.os.Messenger;
@@ -49,14 +52,16 @@ public class DownloadService extends Service {
 	/** Needed to determine the duration of a media file */
 	private MediaPlayer mediaplayer;
 	private DownloadManager downloadManager;
-	
+
 	private volatile boolean shutdownInitiated = false;
 
-	// Objects for communication
-	private final Messenger mMessenger = new Messenger(new IncomingHandler());
+	private final IBinder mBinder = new LocalBinder();
 
-	// Message codes
-	public static final int MSG_QUERY_DOWNLOADS_LEFT = 1;
+	public class LocalBinder extends Binder {
+		public DownloadService getService() {
+			return DownloadService.this;
+		}
+	}
 
 	@Override
 	public void onCreate() {
@@ -72,7 +77,7 @@ public class DownloadService extends Service {
 
 	@Override
 	public IBinder onBind(Intent intent) {
-		return mMessenger.getBinder();
+		return mBinder;
 	}
 
 	@Override
@@ -165,22 +170,28 @@ public class DownloadService extends Service {
 				}
 				queryDownloads();
 			} else if (status == DownloadManager.STATUS_FAILED) {
-				int reason = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_REASON));
+				int reason = c.getInt(c
+						.getColumnIndex(DownloadManager.COLUMN_REASON));
 				Log.d(TAG, "reason code is " + reason);
-				
+
 			}
-			
+
 			c.close();
 		}
 
-		
 	};
 
 	/** Check if there's something else to download, otherwise stop */
-	private synchronized void queryDownloads() {
-		if (!shutdownInitiated && requester.getNumberOfDownloads() == 0) {
+	public synchronized void queryDownloads() {
+		int numOfDownloads = requester.getNumberOfDownloads();
+		if (!shutdownInitiated && numOfDownloads == 0) {
 			shutdownInitiated = true;
 			initiateShutdown();
+		} else {
+			// update notification
+			notificationBuilder.setContentText(numOfDownloads + " Downloads left");
+			NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+			nm.notify(NOTIFICATION_ID, notificationBuilder.getNotification());
 		}
 	}
 
@@ -204,20 +215,6 @@ public class DownloadService extends Service {
 		syncExecutor.execute(new MediaHandlerThread(media, this));
 	}
 
-	class IncomingHandler extends Handler {
-		@Override
-		public void handleMessage(Message msg) {
-			Log.d(TAG, "Received new Message.");
-			switch (msg.what) {
-			case MSG_QUERY_DOWNLOADS_LEFT:
-				queryDownloads();
-				break;
-			default:
-				super.handleMessage(msg);
-			}
-		}
-	}
-
 	/**
 	 * Takes a single Feed, parses the corresponding file and refreshes
 	 * information in the manager

src/de/podfetcher/storage/DownloadRequester.java

@@ -62,6 +62,10 @@ public class DownloadRequester {
 
 	private long download(Context context, ArrayList<FeedFile> type,
 			FeedFile item, File dest) {
+		if (dest.exists()) {
+			Log.d(TAG, "File already exists. Deleting !");
+			dest.delete();
+		}
 		Log.d(TAG, "Requesting download of url " + item.getDownload_url());
 		type.add(item);
 		DownloadManager.Request request = new DownloadManager.Request(
@@ -82,6 +86,8 @@ public class DownloadRequester {
 		long downloadId = manager.enqueue(request);
 		item.setDownloadId(downloadId);
 		item.setFile_url(dest.toString());
+		
+		notifyDownloadService(context);
 		return downloadId;
 	}
 
@@ -245,22 +251,14 @@ public class DownloadRequester {
 	 * ------------ Methods for communicating with the DownloadService
 	 * -------------
 	 */
-	private Messenger mService = null;
+	private DownloadService mService = null;
 	boolean mIsBound;
 
 	private ServiceConnection mConnection = new ServiceConnection() {
 		public void onServiceConnected(ComponentName className, IBinder service) {
-			mService = new Messenger(service);
-
-			try {
-				Message msg = Message.obtain(null,
-						DownloadService.MSG_QUERY_DOWNLOADS_LEFT);
-				Log.d(TAG, "Sending message to DownloadService.");
-				mService.send(msg);
-			} catch (RemoteException e) {
-				Log.e(TAG,
-						"An Exception happened while communication with the DownloadService");
-			}
+			mService = ((DownloadService.LocalBinder)service).getService();
+			Log.d(TAG, "Connection to service established");
+			mService.queryDownloads();
 		}
 
 		public void onServiceDisconnected(ComponentName className) {
@@ -274,6 +272,7 @@ public class DownloadRequester {
 		context.bindService(new Intent(context, DownloadService.class),
 				mConnection, Context.BIND_AUTO_CREATE);
 		mIsBound = true;
+		
 		context.unbindService(mConnection);
 		mIsBound = false;
 	}