title: GestureDetectorCompact not working?
body: <p>My code</p>
  
  <pre><code> public class TestActivity extends AppCompatActivity implements GestureDetector.OnGestureListener, GestureDetector.OnDoubleTapListener {
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_test);
  
          GestureDetectorCompat gestureDetectorCompat=new GestureDetectorCompat(this,this);
          gestureDetectorCompat.setOnDoubleTapListener(this);
      }
  
      @Override
      public boolean onDown(MotionEvent e) {
          return false;
      }
  
      @Override
      public void onShowPress(MotionEvent e) {
  
      }
  
      @Override
      public boolean onSingleTapUp(MotionEvent e) {
          return false;
      }
  
      @Override
      public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
          return false;
      }
  
      @Override
      public void onLongPress(MotionEvent e) {
  
      }
  
      @Override
      public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
          return false;
      }
  
      @Override
      public boolean onSingleTapConfirmed(MotionEvent e) {
          return false;
      }
  
      @Override
      public boolean onDoubleTap(MotionEvent e) {
          return false;
      }
  
      @Override
      public boolean onDoubleTapEvent(MotionEvent e) {
          return false;
      }
  }
  </code></pre>
  
  <p>I'm debugging every method, but none get's called.
  Where i'm wrong?</p>