How to listen to screen orientation changes when orientation is locked.

MyActivity.java

public class MyActivity extends Activity {
  private OrientationEventListener orientationEventListener;
  private boolean isPortrait;
  
  @Override
    public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      orientationEventListener = new OrientationEventListener(this) {
            @Override
            public void onOrientationChanged(int orientation) {
                if (!isPortrait && (
                        orientation < 30 || orientation > 330 || (orientation > 150 && orientation < 210))) {
                    // Orientation changed to portrait
                    isPortrait = true;
                } else if (isPortrait && (
                        (orientation > 60 && orientation < 120) || (orientation > 240 && orientation < 300))) {
                    // Orientation changed to landscape
                    isPortrait = false;
                }
            }
        };
    }
    
    @Override
    protected void onResume() {
        super.onResume();
        orientationEventListener.enable();
    }
    
    @Override
    protected void onPause() {
        orientationEventListener.disable();
        super.onPause();
    }
}