SwipeGestureDetector in Android

SwipeGestureDetector.java

import android.content.Context;
import android.view.MotionEvent;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.animation.AnimationUtils;
import android.widget.ViewFlipper;

public class SwipeGestureDetector extends SimpleOnGestureListener{

	private static final int SWIPE_MIN_DISTANCE = 120;
	private static final int SWIPE_THRESHOLD_VELOCITY = 200;
	private ViewFlipper cViewFlipper ;
	private Context context ;
	public SwipeGestureDetector(ViewFlipper cViewFlipper,Context context){
		this.cViewFlipper = cViewFlipper ;
		this.context = context ;
	}
	@Override
	public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
			float velocityY) {
		try {
			// right to left swipe
			if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
				cViewFlipper.setInAnimation(AnimationUtils.loadAnimation(context, R.anim.left_in));
				cViewFlipper.setOutAnimation(AnimationUtils.loadAnimation(context, R.anim.left_out));					
				cViewFlipper.showNext();
				return true;
			} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
				cViewFlipper.setInAnimation(AnimationUtils.loadAnimation(context, R.anim.right_in));
				cViewFlipper.setOutAnimation(AnimationUtils.loadAnimation(context,R.anim.right_out));
				cViewFlipper.showPrevious();
				return true;
			}

		} catch (Exception e) {
			e.printStackTrace();
		}

		return false;
	}
	
	public void setTopViewFlipper(ViewFlipper viewFlipper){
		cViewFlipper = viewFlipper ;
	}
}