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); } @Override public boolean onDown(MotionEvent arg0) { return false; } /** * 滑屏监测 * */ @Override public 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; } @Override public void onShowPress(MotionEvent arg0) { // TODO Auto-generated method stub } @Override public boolean onSingleTapUp(MotionEvent arg0) { // TODO Auto-generated method stub return false; } @Override public void onLongPress(MotionEvent arg0) { // TODO Auto-generated method stub } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { return false; }}