監聽手指左右滑動螢幕的事件，封裝好了一個類

左右滑動是智能手機最常用的動作，在此簡單的封裝了一下，以後直接拿來用就可以了。

簡單的只需要幾行就可以了，下面那個類是封裝好了的。

package com.example.test;import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.util.Log;import android.widget.RelativeLayout;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//這裡的xml是一個空白的layout//需要監聽左右滑動事件的viewRelativeLayout view = (RelativeLayout) this.findViewById(R.id.layout);//setLongClickable是必須的view.setLongClickable(true);view.setOnTouchListener(new MyGestureListener(this));}/** * 繼承GestureListener，重寫left和right方法 */private class MyGestureListener extends GestureListener {public MyGestureListener(Context context) {super(context);}@Overridepublic boolean left() {Log.e("test", "向左滑");return super.left();}@Overridepublic boolean right() {Log.e("test", "向右滑");return super.right();}}}

package com.example.test;import android.content.Context;import android.view.GestureDetector.SimpleOnGestureListener;import android.view.GestureDetector;import android.view.View;import android.view.View.OnTouchListener;import android.view.MotionEvent;/** * 實現監聽左右滑動的事件，哪個view需要的時候直接setOnTouchListener就可以用了 * @author LinZhiquan * */public class GestureListener extends SimpleOnGestureListener implements OnTouchListener {/** 左右滑動的最短距離 */private int distance = 100;/** 左右滑動的最大速度 */private int velocity = 200;private GestureDetector gestureDetector;public GestureListener(Context context) {super();gestureDetector = new GestureDetector(context, this);}/** * 向左滑的時候調用的方法，子類應該重寫 * @return */public boolean left() {return false;}/** * 向右滑的時候調用的方法，子類應該重寫 * @return */public boolean right() {return false;}@Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,float velocityY) {// TODO Auto-generated method stub// e1：第1個ACTION_DOWN MotionEvent// e2：最後一個ACTION_MOVE MotionEvent// velocityX：X軸上的移動速度（像素/秒）// velocityY：Y軸上的移動速度（像素/秒）// 向左滑if (e1.getX() - e2.getX() > distance&& Math.abs(velocityX) > velocity) {left();}// 向右滑if (e2.getX() - e1.getX() > distance&& Math.abs(velocityX) > velocity) {right();}return false;}@Overridepublic boolean onTouch(View v, MotionEvent event) {// TODO Auto-generated method stubgestureDetector.onTouchEvent(event);return false;}public int getDistance() {return distance;}public void setDistance(int distance) {this.distance = distance;}public int getVelocity() {return velocity;}public void setVelocity(int velocity) {this.velocity = velocity;}public GestureDetector getGestureDetector() {return gestureDetector;}public void setGestureDetector(GestureDetector gestureDetector) {this.gestureDetector = gestureDetector;}}