单手指和双手指（手势探测器）

单手指：

• 　　如果想要监听单手指操作的全部操作监听（有两个接口，仅需要挑选自己需要的来实现）：

　　

public class SingleGesture implements GestureDetector.OnGestureListener,GestureDetector.OnDoubleTapListener {

    @Override
    public boolean onDown(MotionEvent e) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
            float distanceY) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean onSingleTapConfirmed(MotionEvent e) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean onDoubleTap(MotionEvent e) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean onDoubleTapEvent(MotionEvent e) {
        // TODO Auto-generated method stub
        return false;
    }

}

• 　　如果仅仅想要监听单手指操作的一部分简单操作的监听：

public class SingleGesture extends GestureDetector.SimpleOnGestureListener {

}

　　因为SimpleOnGestureListener实现了onGestureListener接口和onDoubleTapListener接口，所以仅仅需要重写两个接口上的所需要的方法即可

　　　　

　

/**
     * A convenience class to extend when you only want to listen for a subset
     * of all the gestures. This implements all methods in the
     * {@link OnGestureListener} and {@link OnDoubleTapListener} but does
     * nothing and return {@code false} for all applicable methods.
     */
    public static class SimpleOnGestureListener implements OnGestureListener, OnDoubleTapListener {
        public boolean onSingleTapUp(MotionEvent e) {
            return false;
        }

        public void onLongPress(MotionEvent e) {
        }

        public boolean onScroll(MotionEvent e1, MotionEvent e2,
                float distanceX, float distanceY) {
            return false;
        }

        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
                float velocityY) {
            return false;
        }

        public void onShowPress(MotionEvent e) {
        }

        public boolean onDown(MotionEvent e) {
            return false;
        }

        public boolean onDoubleTap(MotionEvent e) {
            return false;
        }

        public boolean onDoubleTapEvent(MotionEvent e) {
            return false;
        }

        public boolean onSingleTapConfirmed(MotionEvent e) {
            return false;
        }
    }

双手指：

• 　　如果想要监听单手指操作的全部操作监听

public class TwoFingerGesture implements ScaleGestureDetector.OnScaleGestureListener {

    @Override
    public boolean onScale(ScaleGestureDetector detector) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean onScaleBegin(ScaleGestureDetector detector) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public void onScaleEnd(ScaleGestureDetector detector) {
        // TODO Auto-generated method stub
        
    }

}

• 　　如果仅仅想要监听双手指操作的一部分简单操作的监听：

public class TwoFingerGesture extends ScaleGestureDetector.SimpleOnScaleGestureListener {

}