Android : How to apply swipe to widget or layout in one particular direction in android below is my code

In Main Activity RelativeLayout layoutOptionGet = (RelativeLayout)findViewById(R.id.layoutOptionGet); layoutOptionGet.setOnTouchListener(new OnSwipeTouchListener(this) { @Override public void onSwipeDown() { Toast.makeText(Main.this, "Down", Toast.LENGTH_SHORT).show(); }

          @Override
          public void onSwipeLeft() {
            Toast.makeText(Main.this, "Left", Toast.LENGTH_SHORT).show();
            Intent intent = new Intent(Main.this, GetActivity.class);
            startActivity(intent);
            finish();
          }

          @Override
          public void onSwipeUp() {
            Toast.makeText(Main.this, "Up", Toast.LENGTH_SHORT).show();
          }

          @Override
          public void onSwipeRight() {
            Toast.makeText(Main.this, "Right", Toast.LENGTH_SHORT).show();
          }
        });

OnSwipeTouchListener.class

public class OnSwipeTouchListener implements OnTouchListener {

private GestureDetector gestureDetector;

public OnSwipeTouchListener(Context c) {
  gestureDetector = new GestureDetector(c, new GestureListener());
}

public boolean onTouch(final View view, final MotionEvent motionEvent) {
    return gestureDetector.onTouchEvent(motionEvent);
}

private final class GestureListener extends SimpleOnGestureListener {

    private static final int SWIPE_THRESHOLD = 100;
    private static final int SWIPE_VELOCITY_THRESHOLD = 100;

    @Override
    public boolean onDown(MotionEvent e) {
        return true;
    }

    // Determines the fling velocity and then fires the appropriate swipe event accordingly
    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        boolean result = false;
        try {
            Log.e("onfling","onfling");
            float diffY = e2.getY() - e1.getY();
            float diffX = e2.getX() - e1.getX();
            if (Math.abs(diffX) > Math.abs(diffY)) {
                if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                    if (diffX > 0) {
                        onSwipeRight();
                    } else {
                        onSwipeLeft();
                    }
                }
            } else {
                if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                    if (diffY > 0) {
                        onSwipeDown();
                    } else {
                        onSwipeUp();
                    }
                }
            }
        } catch (Exception exception) {
            exception.printStackTrace();
        }
        return result;
    }
}

public void onSwipeRight() {
}

public void onSwipeLeft() {
}

public void onSwipeUp() {
}

public void onSwipeDown() {
}

}

But any swipe action not working.Please send me the answer.