Implemented MediaButtonEventReceiver

AndroidManifest.xml

@@ -33,8 +33,14 @@
         <activity android:name="de.podfetcher.activity.MediaplayerActivity" android:launchMode="singleTask" android:configChanges="orientation"/>
 
         <service android:enabled="true" android:name="de.podfetcher.service.DownloadService" /> 
-        <service android:enabled="true" android:name="de.podfetcher.service.PlaybackService" />
+        <service android:enabled="true" android:name="de.podfetcher.service.PlaybackService" >
+        </service>
         <activity android:name=".activity.PreferenceActivity"></activity>
         <activity android:name=".activity.DownloadLogActivity"></activity>
+        <receiver android:name=".service.MediaButtonReceiver">
+            <intent-filter>
+                <action android:name="android.intent.action.MEDIA_BUTTON"/>
+            </intent-filter>
+        </receiver> 
     </application>
 </manifest>

src/de/podfetcher/service/MediaButtonReceiver.java

@@ -0,0 +1,31 @@
+package de.podfetcher.service;
+
+import android.content.BroadcastReceiver;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.IBinder;
+import android.util.Log;
+import android.view.KeyEvent;
+
+/** Receives media button events. */
+public class MediaButtonReceiver extends BroadcastReceiver {
+	private static final String TAG = "MediaButtonReceiver";
+	public static final String EXTRA_KEYCODE = "de.podfetcher.service.extra.MediaButtonReceiver.KEYCODE";
+
+	@Override
+	public void onReceive(Context context, Intent intent) {
+		Log.d(TAG, "Received intent");
+		KeyEvent event = (KeyEvent) intent.getExtras().get(
+				Intent.EXTRA_KEY_EVENT);
+		if (event.getAction() == KeyEvent.ACTION_DOWN) {
+			Intent serviceIntent = new Intent(context, PlaybackService.class);
+			int keycode = event.getKeyCode();
+			serviceIntent.putExtra(EXTRA_KEYCODE, keycode);
+			context.startService(serviceIntent);
+		}
+
+	}
+
+}

src/de/podfetcher/service/PlaybackService.java

@@ -7,6 +7,7 @@ import android.R;
 import android.app.Notification;
 import android.app.PendingIntent;
 import android.app.Service;
+import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ -17,6 +18,7 @@ import android.media.AudioManager.OnAudioFocusChangeListener;
 import android.media.MediaPlayer;
 import android.support.v4.app.NotificationCompat;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.SurfaceHolder;
 import android.net.Uri;
 import android.os.AsyncTask;
@@ -62,6 +64,8 @@ public class PlaybackService extends Service {
 	private NotificationCompat.Builder notificationBuilder;
 
 	private AudioManager audioManager;
+	private ComponentName mediaButtonReceiver;
+
 	private MediaPlayer player;
 
 	private FeedMedia media;
@@ -96,6 +100,10 @@ public class PlaybackService extends Service {
 		player.setOnPreparedListener(preparedListener);
 		player.setOnCompletionListener(completionListener);
 		player.setOnSeekCompleteListener(onSeekCompleteListener);
+		mediaButtonReceiver = new ComponentName(getPackageName(),
+				MediaButtonReceiver.class.getName());
+		audioManager.registerMediaButtonEventReceiver(mediaButtonReceiver);
+
 	}
 
 	@Override
@@ -103,6 +111,7 @@ public class PlaybackService extends Service {
 		super.onDestroy();
 		isRunning = false;
 		Log.d(TAG, "Service is about to be destroyed");
+		audioManager.unregisterMediaButtonEventReceiver(mediaButtonReceiver);
 		audioManager.abandonAudioFocus(audioFocusChangeListener);
 		player.release();
 	}
@@ -140,12 +149,19 @@ public class PlaybackService extends Service {
 
 	@Override
 	public int onStartCommand(Intent intent, int flags, int startId) {
+		int keycode = intent.getIntExtra(MediaButtonReceiver.EXTRA_KEYCODE, -1);
+		if (keycode != -1) {
+			Log.d(TAG, "Received media button event");
+			handleKeycode(keycode);
+		} else {
+
 			long mediaId = intent.getLongExtra(EXTRA_MEDIA_ID, -1);
 			long feedId = intent.getLongExtra(EXTRA_FEED_ID, -1);
-		boolean playbackType = intent
+			boolean playbackType = intent.getBooleanExtra(EXTRA_SHOULD_STREAM,
-				.getBooleanExtra(EXTRA_SHOULD_STREAM, true);
+					true);
 			if (mediaId == -1 || feedId == -1) {
-			Log.e(TAG, "Media ID or Feed ID wasn't provided to the Service.");
+				Log.e(TAG,
+						"Media ID or Feed ID wasn't provided to the Service.");
 				if (media == null || feed == null) {
 					stopSelf();
 				}
@@ -180,9 +196,33 @@ public class PlaybackService extends Service {
 				Log.w(TAG, "Something went wrong. Shutting down...");
 				stopSelf();
 			}
+		}
 		return Service.START_NOT_STICKY;
 	}
 
+	/** Handles media button events */
+	private void handleKeycode(int keycode) {
+		switch (keycode) {
+		case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
+			if (status == PlayerStatus.PLAYING) {
+				pause();
+			} else if (status == PlayerStatus.PAUSED) {
+				play();
+			}
+			break;
+		case KeyEvent.KEYCODE_MEDIA_PLAY:
+			if (status == PlayerStatus.PAUSED) {
+				play();
+			}
+			break;
+		case KeyEvent.KEYCODE_MEDIA_PAUSE:
+			if (status == PlayerStatus.PLAYING) {
+				pause();
+			}
+			break;
+		}
+	}
+
 	/**
 	 * Called by a mediaplayer Activity as soon as it has prepared its
 	 * mediaplayer.
@@ -343,7 +383,6 @@ public class PlaybackService extends Service {
 
 			if (focusGained == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
 				Log.d(TAG, "Audiofocus successfully requested");
-
 				Log.d(TAG, "Resuming/Starting playback");
 				SharedPreferences.Editor editor = getApplicationContext()
 						.getSharedPreferences(PodcastApp.PREF_NAME, 0).edit();