Detect volume button other way about flutter_hardware_buttons

[giantsol]

Hi @nexussmart ,

In normal Android development(i.e. native Android), it is very easy to detect volume button events without requesting ACTION_MANAGER_OVERLAY_PERMISSION that we request here. You can just override onKeyDown method in your Activity.

However, flutter plugin environment provides very limited api, and there was no easy way to implement volume detection except what we did in this plugin. So.. as far as it seems now, ACTION_MANAGER_OVERLAY_PERMISSION is necessary.

Besides, the link you shared with us is only for Cordova, and its development environment is different from that of flutter plugin, so it couldn't be our option :(

Thanks.

[nexussmart]

Hi @giantsol,

I override the mainactivity to detect event key Volume Up and Down :

`

public static final String STREAM = "com.enterprise.eventkeychannel/stream";

private EventChannel.EventSink eventSink = null;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
GeneratedPluginRegistrant.registerWith(this);
new EventChannel(getFlutterView(), STREAM).setStreamHandler(
  new EventChannel.StreamHandler() {
      @Override
      public void onListen(Object args, final EventChannel.EventSink events) {
          eventSink = events;
      }
      @Override
      public void onCancel(Object args) {
          eventSink = null;
      }
  }
 );
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
  if(event.getKeyCode() == KeyEvent.KEYCODE_VOLUME_DOWN) {
    if( eventSink != null) { eventSink.success(0); }
  } else {
    if(event.getKeyCode() == KeyEvent.KEYCODE_VOLUME_UP) {
      if( eventSink != null) { eventSink.success(1); }
    }
  }
  return super.dispatchKeyEvent(event);
}`

[giantsol]

Yep, that's exactly what you can do if it's your own app.
However, in our case, as we're developing a plugin, we cannot override your(or other app's) MainActivity, so we can't take the easy way that you just implemented.

You just wrote your own EventChannel!
Congratulations! 💪🏻