Android服务正在停止，如何通知应用程序？

Question

I have an application which works like a framework - other apps can register a PendingIntent with my app which triggers them at some point in the future. I am keeping the PendingIntents in an array list in a service and then iterating over them to trigger. To register an intent the application calls "startService()" with a PendingIntent set within the intent bundle.

At some point, my service is being closed - or more specifically my array list is being emptied (which can only happen by Android killing the service) and as such I loose my PendingIntents for the registered apps.

How can I keep my service alive, or more specifically keep my PendingItents from being lost? I don't want to go against the Android system mechanisms and create a hacky effort, I would like to know the way in which Google think this should be done.

Answer 1

Have you tried with START_STICKY ?

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    // Put your code here
    return START_STICKY;
}

You can try START_REDELIVER_INTENT

Answer 2

When a service is killed, it's onDestroy() method is called. You could probably over-ride the onDestroy() method and do something like:

public void onDestroy(){
Intent intent = new Intent();
intent.setAction("SERVICESTOPPED");
sendBroadcast(intent);
super.onDestroy();  
}   

Have a BroadcastReceiver that listens to this intent and handle the situation as and when it happens. Alternatively, in the onstartCommand(), if you specify the return value as START_STICKY, the OS will restart your service if it gets killed by OS. Generally this happens with long running serices