Android GestureDetector 手势检测

package com.mytest;

import android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.MotionEvent;
import android.widget.Toast;

public class GestureTest extends Activity implements OnGestureListener {

	private final String TAG = "GestureTest";

	/**
	 * Gusture的使用
	 * 
	 * Android 为手势检测提供一个GestureDetertor类，代表了一个手势检测器。 需要创建一个onGestureListener
	 * 
	 * 使用步骤：
	 * 
	 * 1. 创建一个 onGestureListener(让Activity 实现这个接口)
	 * 
	 * 2. 创建一个 GrestureDetector
	 * 
	 * 3. 重写函数onTouchEvent,把Activity的事件交给GestureDetector处理
	 * */

	private GestureDetector detector;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.gesturetest);

		detector = new GestureDetector(this, this);

	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {
		// TODO Auto-generated method stub
		// return super.onTouchEvent(event);

		return detector.onTouchEvent(event);
	}

	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
	}

	// =======================================

	/* 按下时触发 */
	@Override
	public boolean onDown(MotionEvent e) {
		// TODO Auto-generated method stub
		Toast.makeText(this, "--- onDown ---", Toast.LENGTH_SHORT).show();
		return false;
	}

	/* 滑动时触发，X,Y分别对应速度 */
	@Override
	public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
			float velocityY) {
		// TODO Auto-generated method stub
		Toast.makeText(this, "--- onFling ---", Toast.LENGTH_SHORT).show();
		return false;
	}

	/* 长按时触发 */
	@Override
	public void onLongPress(MotionEvent e) {
		// TODO Auto-generated method stub
		Toast.makeText(this, "--- onLongPress ---", Toast.LENGTH_SHORT).show();
	}

	@Override
	public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
			float distanceY) {
		// TODO Auto-generated method stub
		Toast.makeText(this, "--- onScroll ---", Toast.LENGTH_SHORT).show();
		return false;
	}

	/* 按下还未松开和移动时触发 */
	@Override
	public void onShowPress(MotionEvent e) {
		// TODO Auto-generated method stub
		Toast.makeText(this, "--- onShowPress ---", Toast.LENGTH_SHORT).show();
	}

	/* 用户在触摸屏上轻击事件触发 */
	@Override
	public boolean onSingleTapUp(MotionEvent e) {
		// TODO Auto-generated method stub
		Toast.makeText(this, "--- onSingleTapUp ---", Toast.LENGTH_SHORT)
				.show();
		return false;
	}

}