Android监测手指上下左右滑动屏幕

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在开发android程序时，有时会需要监测手指滑动屏幕，当手指朝上下左右不同方向滑动时做出不同的响应，那怎么去实现呢？

利用Android提供的手势监测器就可以很方便的实现，直接上代码（已测试通过）

public class CbMainActivity extends Activity implements  android.view.GestureDetector.OnGestureListener{//定义手势检测器实例GestureDetector detector;    @Override    protected void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentView(R.layout.cb_main);        //创建手势检测器        detector = new GestureDetector(this,this);     }    //将该activity上的触碰事件交给GestureDetector处理    public boolean onTouchEvent(MotionEvent me){    return detector.onTouchEvent(me);    }    @Overridepublic boolean onDown(MotionEvent arg0) {return false;}/** * 滑屏监测 *  */@Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,float velocityY) {float minMove = 120;         //最小滑动距离float minVelocity = 0;      //最小滑动速度float beginX = e1.getX();     float endX = e2.getX();float beginY = e1.getY();     float endY = e2.getY();if(beginX-endX>minMove&&Math.abs(velocityX)>minVelocity){   //左滑Toast.makeText(this,velocityX+"左滑",Toast.LENGTH_SHORT).show();}else if(endX-beginX>minMove&&Math.abs(velocityX)>minVelocity){   //右滑Toast.makeText(this,velocityX+"右滑",Toast.LENGTH_SHORT).show();}else if(beginY-endY>minMove&&Math.abs(velocityY)>minVelocity){   //上滑Toast.makeText(this,velocityX+"上滑",Toast.LENGTH_SHORT).show();}else if(endY-beginY>minMove&&Math.abs(velocityY)>minVelocity){   //下滑Toast.makeText(this,velocityX+"下滑",Toast.LENGTH_SHORT).show();}return false;}@Overridepublic void onShowPress(MotionEvent arg0) {// TODO Auto-generated method stub}@Overridepublic boolean onSingleTapUp(MotionEvent arg0) {// TODO Auto-generated method stubreturn false;}@Overridepublic void onLongPress(MotionEvent arg0) {// TODO Auto-generated method stub}@Overridepublic boolean onScroll(MotionEvent e1, MotionEvent e2, float velocityX,float velocityY) {return false;}}

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