极光推送（守护进程）

采用双服务的方式，有MainService（推送服务）和CoreService（守护服务），能够在一定程度上解决服务被杀的问题。

一. 将极光推送Service 和主进程隔离开
Required SDK 核心功能可配置android:process参数将PushService放在其他进程中

  android:process=":ServiceProcess"  android:exported="false">

二. 新建一个轻量级的CoreService作为守护,主要用于唤醒进程

public class CoreService extends Service {     private static final String TAG = CoreService.class.getSimpleName();      @Override        public IBinder onBind(final Intent intent) {        Log.d(TAG, "onBind()");        return null;    }        @Override       public void onCreate() {         super.onCreate();           Log.d(TAG, "onCreate()");        keepMeAlive();     }       @Override        public void onDestroy() {        Log.d(TAG, "onDestroy()");            super.onDestroy();       }       @Override        public int onStartCommand(final Intent intent, final int flags, final int startId) {          // send status notice//              IntentHandler.sendStatusNoticeToAll(this);             this.startService(new Intent(this,PushReceiver.class));           Log.d(TAG, "onStartCommand");               return START_STICKY;        }        public void keepMeAlive() {        // check every two hour to start process               final long now = System.currentTimeMillis();              final long intervalMillis = 1000*30;               final long triggerAtMillis = now + intervalMillis;               final Intent intent = new Intent(this, CoreService.class);               final PendingIntent operation = PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);          final AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);       am.setRepeating(AlarmManager.RTC_WAKEUP, triggerAtMillis, intervalMillis, operation);    }}

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