Android實(shí)現(xiàn)手勢(shì)滑動(dòng)的方法

public class MyRelativeLayout extends RelativeLayout implements GestureDetector.OnGestureListener{
 private float mPosX, mPosY, mCurPosX, mCurPosY;
 private static final int FLING_MIN_DISTANCE = 20;// 移動(dòng)最小距離
 private static final int FLING_MIN_VELOCITY = 200;// 移動(dòng)最大速度
 //構(gòu)建手勢(shì)探測(cè)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個(gè)ACTION_DOWN MotionEvent 
  // e2：最后一個(gè)ACTION_MOVE MotionEvent 
  // velocityX：X軸上的移動(dòng)速度（像素/秒） 
  // velocityY：Y軸上的移動(dòng)速度（像素/秒） 

  // X軸的坐標(biāo)位移大于FLING_MIN_DISTANCE，且移動(dòng)速度大于FLING_MIN_VELOCITY個(gè)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;  
 } 
}

public class PhoneGuard01 extends Activity {
 private GestureDetector mGestureDetector;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_phone_guard01);
  //創(chuàng)建手勢(shì)識(shí)別對(duì)象,并創(chuàng)建手勢(shì)識(shí)別的監(jiān)聽(tīng)  
  mGestureDetector = new GestureDetector(this,new SimpleOnGestureListener(){

   //這個(gè)方法需要自己去重寫(xiě)
   @Override
   public boolean onFling(MotionEvent e1, MotionEvent e2,
     float velocityX, float velocityY) {

    float X1=e1.getX();//獲取按下去的坐標(biāo)點(diǎn),X軸
    float X2=e2.getX();//獲取提起來(lái)的坐標(biāo)點(diǎn),Y軸


    float Y1=e1.getY();//獲得按下去的Y軸坐標(biāo)點(diǎn)
    float Y2=e1.getY();//獲得提起來(lái)的Y軸坐標(biāo)點(diǎn)

    //Y的移動(dòng)距離，比X 的移動(dòng)距離要大，所以不做任何的操作
    if(Math.abs(Y1-Y2)>Math.abs(X1-X2)){

     return false;
    }


    if(X1>X2){//表示下一頁(yè)
     nextPage(null);
    }    
    return super.onFling(e1, e2, velocityX, velocityY);
   }

  });

 }

 /**
  下面代碼的意思就是說(shuō),把自己的手勢(shì)識(shí)別的觸摸事件,
  讓父類去調(diào)用

 */

 //onTouchEvent(MotionEvent event)是繼承來(lái)自View對(duì)象的
 @Override
 public boolean onTouchEvent(MotionEvent event) {
  //mGestureDetector.onTouchEvent(event)是GestureDetector自己本身的
  mGestureDetector.onTouchEvent(event);
  return super.onTouchEvent(event);
 }

//-----------------上面就是手勢(shì)識(shí)別的代碼實(shí)現(xiàn)------------------------------
 //跳轉(zhuǎn)到下一個(gè)頁(yè)面
 public void nextPage(View v){  
  Intent intent=new Intent(this,PhoneGuard02.class);

  startActivity(intent);
  finish();

 }

}