OnSwipeTouchListener

import android.content.Context;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;

public class OnSwipeTouchListener implements View.OnTouchListener
{
// -- Construction

    public OnSwipeTouchListener(Context context) {
        mGestureDetector = new GestureDetector(context, new GestureListener());
    }

// -- Functions

    public void onSwipeLeft() {
    }

    public void onSwipeRight() {
    }

    public void onSwipeTop() {
    }

    public void onSwipeBottom() {
    }


    public boolean onTouch(View v, MotionEvent event) {
        return mGestureDetector.onTouchEvent(event);
    }

// -- Inner Types

    private final class GestureListener extends GestureDetector.SimpleOnGestureListener
    {

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

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

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
        {
            boolean result = false;
            try {
                float diffY = e2.getY() - e1.getY();
                float diffX = e2.getX() - e1.getX();
                if (Math.abs(diffX) > Math.abs(diffY))
                {
                    if (Math.abs(diffX) > SWIPE_DISTANCE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD)
                    {
                        if (diffX > 0) {
                            onSwipeRight();
                        } else {
                            onSwipeLeft();
                        }
                    }
                    result = true;
                }
                else if (Math.abs(diffY) > SWIPE_DISTANCE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD)
                {
                    if (diffY > 0) {
                        onSwipeBottom();
                    } else {
                        onSwipeTop();
                    }
                }
                result = true;

            } catch (Exception exception) {
                exception.printStackTrace();
            }
            return result;
        }
    }

// -- Variables

    private final GestureDetector mGestureDetector;
}