How to correctly use a JobService?

Question

I have implemented an application in Android that uses JobService to check for updates. I have tested it with some devices: Samsung J3, RedMi 5+, RedMi note pro, MI A2 lite. It is working correctly in J3 but, in other phones that I have tested JobService is not being scheduled if an application is not active or application is not in the recent apps list.

Here is how I have implemented.

MainActivity.java

public static void scheduleJob(Context context) {
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
            JobScheduler js =
                    (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
            JobInfo job = new JobInfo.Builder(
                    MY_BACKGROUND_JOB,
                    new ComponentName(context, CheckAdService.class))
                    .setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
                    .setPersisted(true)
                    .setPeriodic(15 * 60 * 1000)
                    .build();
            int resultCode = js.schedule(job);
            if (resultCode == JobScheduler.RESULT_SUCCESS) {
                Log.d("JOB", "Scheduled");
            } else {
                Log.d("JOB", "Not Scheduled");
            }
        }
    }

Service.java

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public class CheckAdService extends JobService {

    @Override
    public boolean onStartJob(JobParameters params) {
        Log.d("NetworkAvailable", "Flag No 2");
        doBackgroundWork(params);
        return true;
    }

    private void doBackgroundWork(final JobParameters params) {
        final Context context = getApplicationContext();
              ...

            IonDB ionDB = new IonDB(CheckAdService.this, "checkStatus");
            ionDB.getData(new OnDbData() {
                @Override
                public void OnDbDataReceived(JsonObject jsonObject, boolean withError) {
                   ...
                   // after notifying user with news I call jobFinished with rescheduling true option 
                     jobFinished(params, true);

                }
           });
     }

    @Override
    public boolean onStopJob(JobParameters params) {
        Log.d("DBDATA", "Job cancelled before completion");
        return true;
    }
}

Please correct my implementation of JobService so that it works in all android versions >= LOLLIPOP.

Considering that I'm new in Android if I made some coding mistakes please let me know any suggestion.

Not in many others, but I think that it is not working in MI phones and Android with higher versions @DevMike01 — Mukhammadsher, Mar 30 '19 at 09:42
Are you executing your background work on the same thread as your JobService? — ror, Mar 30 '19 at 09:44
JobService is just a backwards compatible service with some additional features and no thread handling, if you're using newer Android versions use Workmanager instead — Karan Harsh Wardhan, Mar 30 '19 at 09:50
@Mukhammadsher as per https://developer.android.com/reference/android/app/job/JobService : This means that you must offload your execution logic to another thread/handler/AsyncTask of your choosing. Not doing so will result in blocking any future callbacks from the JobManager — ror, Mar 30 '19 at 09:51

score 0 · Answer 1 · edited Mar 30 '19 at 12:35

0

I guess if you will use worker Manager it will be more correct.
It has capability between the different Android versions.

edited Mar 30 '19 at 12:35

Tamir Abutbul

7,301
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answered Mar 30 '19 at 09:48

Alexander

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Well, I have implemented `workManager` and it is working well in all android versions that I wanted (tested in emulator), but still in **MI** phones if I close the application it is not checking for updates anymore, Can you help me to tackle this please @Alexander @kkarakk – Mukhammadsher Mar 31 '19 at 07:26
I guess the MI phones have a limit for the background process. Please, check the settings. https://www.quora.com/How-to-restrict-background-data-in-Redmi-note-4 The 2 effective ways for restricting background data will be. – Alexander Mar 31 '19 at 10:54

How to correctly use a JobService?

1 Answers1