20160127_Android程序完全退出的方法

Android程序完全退出的方法

　　综合比较各种应用程序退出的方法，总结下述最优策略。使应用程序完全退出总共分3步：

• finish所有Activity
• 关闭所有后台进程
• 应用程序退出

　　代码如下：

/**
 * 退出应用程序
 * @param context
 */
 @SuppressWarnings("deprecation")
 public void AppExit(Context context){
 　　try {
 　　　　finishAllActivity();
        ActivityManager activityMgr = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        activityMgr.restartPackage(context.getPackageName());
        System.exit(0);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private static Stack<Activity> activityStack;
/**
* 结束所有Activity
* @return
*/
public void finishAllActivity() {
    for (int i = 0, size = activityStack.size(); i < size; i++) {
    　　if(activityStack.get(i)!=null){
        　　activityStack.get(i).finish();
    　　}
   　　 activityStack.clear();
    }
}

注解：

1. finish所有Activity：遍历activityStack，逐个finish；
2. 关闭所有后台进程：

   ActivityManager activityMgr = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); 
   activityMgr.restartPackage(context.getPackageName());
   
   (1) 需要添加关闭应用程序的权限：
   　　<uses-permission android:name="android.permission.RESTART_PACKAGES" />
   (2) API:
   

   　　public void restartPackage (String packageName)

   　　This method was deprecated in API level 8.
   　　This is now just a wrapper for killBackgroundProcesses(String); the previous behavior here is no longer available to applications because it allows them to break other applications by removing their 　　alarms, stopping their services, etc. 

    

   　　public void killBackgroundProcesses (String packageName)

   　　Have the system immediately kill all background processes associated with the given package. This is the same as the kernel killing those processes to reclaim memory; the system will 　　take care of restarting these processes in the future as needed.

   　　You must hold the permission KILL_BACKGROUND_PROCESSES to be able to call this method.

   　　Parameters

   　　The name of the package whose processes are to be

3. 应用程序退出：System.exit(0)