三种方法让你的Service不被“一键加速”和系统杀掉

基本上大家都知道提高service优先级可以在很大程度上让你的service免于因为内存不足而被kill，当然系统只是在此时先把优先级低的kill掉，如果内存还是不够，也会把你的service干掉的.

1.android:persistent="true"

常驻内存属性对第三方app无效，下面是官方说明

android:persistent

Whether or not the application should remain running at all times — "true" if it should, and "false" if not. The default value is "false". Applications should not normally set this flag; persistence mode is intended only for certain system applications.

2.startForeground将其放置前台

Notification notification = new Notification();notification.flags = Notification.FLAG_ONGOING_EVENT;notification.flags |= Notification.FLAG_NO_CLEAR;notification.flags |= Notification.FLAG_FOREGROUND_SERVICE;startForeground(1, notification);

3.可以监听Intent.ACTION_TIME_TIC系统时钟广播，系统每隔一段时间发送这个广播，当service被杀死的时候，隔一段时间通过广播启动

静态注册android.intent.action.TIME_TICK监听

判断service是否启动

public boolean isServiceRunning(String serviceName)	{		ActivityManager manager = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE); 	for (RunningServiceInfo service :manager.getRunningServices(Integer.MAX_VALUE)) 	{ 		if(serviceName.equals(service.service.getClassName()))		{ 			return true; 		} 	}	return false;	}

接受到广播后判断是否启动该service 若没有启动就启动它

if(intent.getAction().equals(Intent.ACTION_TIME_TICK))	{				if (!isServiceRunning(name)) 	{ 		Intent mIntent = new Intent(context, MyService.class); 		context.startService(mIntent); 	}}