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package com.qing.leftrightdemo;
import android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.Toast;
public class MainActivity 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.activity_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;
}
} | 
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