Gesture_Listener.MD

Gesture Listener

1. Declare variable of type GestureDetectorCompat

  private GestureDetectorCompat mGestureDetectorCompat;

2. Initialize the variable

mGestureDetectorCompat = new GestureDetectorCompat(this, new GestureDetector.SimpleOnGestureListener())

3. Override the methods

           mGestureDetectorCompat = new GestureDetectorCompat(this, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                if ((e1.getX() > e2.getX())) { //load meme when swiped R2L
                    loadMeme();
                }
                return super.onFling(e1, e2, velocityX, velocityY);
            }
        });

NOTE: You can override other methods as well.

4. Override the OnTouchEvent() in the main activity

@Override
    public boolean onTouchEvent(MotionEvent event) {
        mGestureDetectorCompat.onTouchEvent(event);
        return super.onTouchEvent(event);
    }