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。

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.

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); 

监听系统广播

    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。动态注册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); }    }