Android手势滑动(左滑和右滑)

最近想实现Android左滑弹出菜单框,右滑消失菜单这个个功能。了解了一下Android 的滑动事件,必须是在view组件或者Activity上实现,同时必须实现OnTouchListener, OnGestureListener这个两个接口。

public class MyRelativeLayout extends RelativeLayout implements GestureDetector.OnGestureListener{
    private float mPosX, mPosY, mCurPosX, mCurPosY;
    private static final int FLING_MIN_DISTANCE = 20;// 移动最小距离
    private static final int FLING_MIN_VELOCITY = 200;// 移动最大速度
    //构建手势探测器  
    GestureDetector mygesture = new GestureDetector(this);
    public MyRelativeLayout(Context context){
        super(context)
    }

    public MyRelativeLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        // TODO Auto-generated constructor stub
    }

    public MyRelativeLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
    }
       @Override
    public boolean onTouchEvent(MotionEvent arg0) {
        // TODO Auto-generated method stub
        return mDetector.onTouchEvent(arg0);

    }

    @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 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 onFling(MotionEvent e1, MotionEvent e2, float velocityX,
            float velocityY) {
        // TODO Auto-generated method stub
        // e1:第1个ACTION_DOWN MotionEvent   
        // e2:最后一个ACTION_MOVE MotionEvent   
        // velocityX:X轴上的移动速度(像素/秒)   
        // velocityY:Y轴上的移动速度(像素/秒)   

        // X轴的坐标位移大于FLING_MIN_DISTANCE,且移动速度大于FLING_MIN_VELOCITY个像素/秒   
        //向左  
        if (e1.getY() - e2.getY() > FLING_MIN_DISTANCE){      
//                     && Math.abs(velocityX) > FLING_MIN_VELOCITY) {      
            collapse();
             }   
        //向上  
        if (e2.getY() - e1.getY() > FLING_MIN_DISTANCE      
                     && Math.abs(velocityX) > FLING_MIN_VELOCITY) {

        }      
           return false;     
    }  
}

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