Detect presses to headset buttons on Android?

Question

How can I detect if a buton, on a pair of headphones, was pressed while running an Android app? Music applications use to this button to stop, play, pause music, etc.

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Answer 1

There's a simpler way which doesn't require any BroadcastReceiver to be registered if you only want to listen for headset button callbacks while your app (particular activity) is running, simply override Activity onKeyDown method:

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if(keyCode == KeyEvent.KEYCODE_HEADSETHOOK){
        //handle click
        return true;
    }
    return super.onKeyDown(keyCode, event);
}