title: Double tap event in android
body: <p>I need to toast something on double tap the screen. I tried the following code. But it's not working. No toast is coming on double tapping. What is wrong with these code?</p>
  
  <pre><code>package a.b.c;
  
  import android.app.Activity;
  import android.os.Bundle;
  import android.view.GestureDetector.OnDoubleTapListener;
  import android.view.GestureDetector.OnGestureListener;
  import android.view.MotionEvent;
  import android.widget.Toast;
  
  
  
  public class SampleActivity extends Activity implements OnDoubleTapListener,OnGestureListener
  {
          @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);
      }
  
      @Override
      public boolean onDoubleTap(MotionEvent e) {
          if(e.getAction()==1)
          {
          Toast.makeText(getBaseContext(), "onDoubleTap", Toast.LENGTH_LONG).show();
          }
          return true;
      }
  
      @Override
      public boolean onDoubleTapEvent(MotionEvent e) {
          if(e.getAction()==1)
          {
          Toast.makeText(getBaseContext(), "onDoubleTapEvent", Toast.LENGTH_LONG).show();
          }
          return true;
      }
  
      @Override
      public boolean onSingleTapConfirmed(MotionEvent e) {
          if(e.getAction()==1)
          {
          Toast.makeText(getBaseContext(), "onSingleTapConfirmed", Toast.LENGTH_LONG).show();
          }
          return true;
      }
  </code></pre>
  
  <p>I also implemented the OnGestureListener methodes. But have no effect. Please help.</p>