Callback to jobservice from intentservcie

Question

I have a jobscheduler that triggers onStartjob of Jobservice. In onStartJob, I start an intentservice to do the work. After the work is done, I want intentservice to do a callback to jobservice so that onjobfinished can be called. How can I do a callback to JobService?

Answer 1

You can create BroadcastReceiver and register it in your Jobservice, in onStartJob() method, using some ACTION constant (for example ACTION_DOWNLOAD_FINISHED). This receiver will delegate all work to onJobFinished() method:

public static final String ACTION_DOWLOAD_FINISHED = "actionDownloadFinished";

private BroadcastReceiver downloadFinishedReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) { 
        context.unregisterReceiver(this); //Unregister receiver to avoid receiver leaks exception
        onJobFinished();
    }
};

public void onStartJob() {
    IntentFilter filter = new IntentFilter(ACTION_DOWNLOAD_FINISHED);        
    //Use LocalBroadcastManager to catch the intents only from your app
    LocalBroadcastManager.getInstance(this).registerReceiver(downloadFinishedReceiver , filter);

    //other job starting stuff...
}

Then, after the intent service has ended it's work, you can send broadcasting intent with ACTION_DOWNLOAD_FINISHED action from it:

// ...downloading stuff
Intent downloadFinishedIntent = new Intent(Jobservice.ACTION_DOWNLOAD_FINISHED);
//Use LocalBroadcastManager to broadcast intent only within your app
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);

When the job of the intent service is finished, it sends broadcasting intent that is catched by the receiver registered in the Jobservice. Receiver then invokes the onJobFinished() method.

You can find the details there: https://developer.android.com/training/run-background-service/report-status.html