package com.example.velocity;import android.support.v7.app.ActionBarActivity;import android.os.Bundle;import android.view.GestureDetector;import android.view.GestureDetector.OnDoubleTapListener;import android.view.GestureDetector.OnGestureListener;import android.view.MotionEvent;import android.view.View;import android.view.View.OnTouchListener;import android.widget.RelativeLayout;public class MainActivity extends ActionBarActivity implements OnGestureListener, OnDoubleTapListener {    private RelativeLayout rl;    private GestureDetector gd;     @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        rl = (RelativeLayout) findViewById(R.id.rl);        gd = new GestureDetector(this);        gd.setOnDoubleTapListener(this);        rl.setOnTouchListener(new OnTouchListener() {            @Override            public boolean onTouch(View v, MotionEvent event) {                boolean onTouchEvent = gd.onTouchEvent(event);                return onTouchEvent;            }        });    }        @Override    public boolean onDown(MotionEvent e) {        // TODO Auto-generated method stub        System.out.println("down");        return true;    }    @Override    public void onShowPress(MotionEvent e) {        // TODO Auto-generated method stub        System.out.println("没松开或者拖动");    }    @Override    public boolean onSingleTapUp(MotionEvent e) {        System.out.println("单击行为");        return true;    }    //滑动中触发    @Override    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,            float distanceY) {//        System.out.println("onScroll");//        if(e1.getRawX()-e2.getRawX()<0){//            System.out.println("右滑");//        }else if(e1.getRawX()-e2.getRawX()>0){//            System.out.println("左滑");//        }        return false;    }    //长按    @Override    public void onLongPress(MotionEvent e) {        // TODO Auto-generated method stub            }    //滑动结束触发    @Override    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,            float velocityY) {        if(e1.getRawX()-e2.getRawX()<-300){            System.out.println("右滑");        }else if(e1.getRawX()-e2.getRawX()>300){            System.out.println("左滑");        }        return true;    }        //严格的单击行为    @Override    public boolean onSingleTapConfirmed(MotionEvent e) {        // TODO Auto-generated method stub        return false;    }    //双击,不可能和onSingleTapConfirmed共同    @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;    }}