Question

I wanted to create a broadcastreceiver which listens for android.intent.action.MEDIA_BUTTON, and get the extra_key_event from that and act accordingly. Somehow the onreceive action is not performed.

In my Manifest:

receiver android:name="MediaButtonReceiver"
intent-filter
 action android:name="android.intent.action.MEDIA_BUTTON" 
intent-filter

receiver

In my broadcastreceiver:

public class MVCS extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
    if (Intent.ACTION_MEDIA_BUTTON.equals(intent.getAction())) {
        /* handle media button intent here by reading contents */
        /* of EXTRA_KEY_EVENT to know which key was pressed    */

        KeyEvent ke = (KeyEvent)intent.getExtras().get(Intent.EXTRA_KEY_EVENT); 
        if (ke .getKeyCode() == KeyEvent.KEYCODE_VOLUME_DOWN) {
            Toast.makeText(context, "BUTTON PRESSED!", Toast.LENGTH_SHORT).show();  
        }
    }
}

However, nothing is displayed when i press the volume down key.

Any help would be much appreciated!

Answer 1

You need to register your broadcast receiver in your Activity, with method registerReceiver().
As your code is not complete here, I can’t tell you exactly how, but bear in mind that after instantiate your MVCS class, you should register like:

MyActivity.registerReceiver( myBroadcastReceiver, MediaButtonReceiver);

Better way of doing this is to register your receiver in OnStart() of your activity and unregister it in OnStop().