android中双击退出程序的帮助类

来源：互联网发布：淘宝假冒品牌处罚编辑：程序博客网时间：2024/06/07 23:11

package com.csdn.sunyudoong.csdn.ui;import android.app.Activity;import android.os.Handler;import android.os.Looper;import android.view.KeyEvent;import android.widget.Toast;import com.csdn.sunyudoong.csdn.AppManager;import com.csdn.sunyudoong.csdn.R;/** * 双击退出 * Created by sunyudong on 2016/6/6. */public class DoubleClickExitHelper {    private final Activity mActivity;    //是否退出    private  boolean isOnKeyBacking;    private Handler mHandler;    private Toast mBackToast;    public DoubleClickExitHelper(Activity activity) {        mActivity = activity;        mHandler = new Handler(Looper.getMainLooper());    }    /**     * Activity onKeyDown事件     * */    public boolean onKeyDown(int keyCode, KeyEvent event) {        if(keyCode != KeyEvent.KEYCODE_BACK) {            return false;        }        if(isOnKeyBacking) {        //第二次点击返回键            mHandler.removeCallbacks(onBackTimeRunnable);            if(mBackToast != null){                mBackToast.cancel();            }            // 退出            AppManager.getAppManager().AppExit(mActivity);            return true;        } else {        //第一次点击            isOnKeyBacking = true;            if(mBackToast == null) {                mBackToast = Toast.makeText(mActivity, "再次点击退出开源中国", Toast.LENGTH_SHORT);            }            mBackToast.show();            //延迟两秒            mHandler.postDelayed(onBackTimeRunnable, 2000);            return true;        }    }    private Runnable onBackTimeRunnable = new Runnable() {//两秒过后执行的事情        @Override        public void run() {            isOnKeyBacking = false;            if(mBackToast != null){                mBackToast.cancel();            }        }    };}

调用方式，在需要调用的activity中的onKeyDown方法中调用
下面我是简写的，大家应该能够看懂，在一个activity中先定义对象
然后调用对象的方法

   private DoubleClickExitHelper mDoubleClickExit;   mDoubleClickExit = new DoubleClickExitHelper(this);  @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {        if (keyCode == KeyEvent.KEYCODE_BACK) {            // 是否退出应用       return mDoubleClickExit.onKeyDown(keyCode, event);        }        return super.onKeyDown(keyCode, event);    }

0 0