How to destroy a jobSchedule via Activity?

Question

I’m studying the services in Android Background and managed to create a service in Background that already works well in the background even after restarting the android or close the App. The problem is when I want to close Jobservice by a button in Activity.

I tried with: jobScheduler.cancel(id) and jobScheduler.cancelAll(). But neither of them had any effect.

My code is as follows currently:

---

Broadcastreceiver.java

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                ComponentName comp = new ComponentName(context.getPackageName(), ServiceLocationJob.class.getName());

                JobScheduler jobScheduler = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);

                JobInfo jobInfo = new JobInfo.Builder(11, comp)
                        // only add if network access is required
                        .setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
                        .setMinimumLatency(1)
                        .setOverrideDeadline(1)
                        .build();

                jobScheduler.schedule(jobInfo);
                Log.d(Tag, "Iniciado servicoJob as: " + c.getTime().toString());
            }

---

Servicelocationjob.java

    private Thread locationThread;

        @Override
        public boolean onStartJob(JobParameters jobParameters) {

            locationThread = new Thread(new Runnable() {
                @Override
                public void run() {
                    Log.d(Tag, "Serviço (API<21) iniciado pelo Broadcast com sucesso!");

                    new Timer().scheduleAtFixedRate(new TimerTask(){
                        @Override
                        public void run(){
                            Calendar c = Calendar.getInstance();
                            Log.i(Tag, "Serviço funcionando a cada 10 segundos mesmo após reiniciar: " + c.getTime());
                        }
                    },0,10000);
                }
            });

            locationThread.start();

            return true;
        }

---

And finally Mainactivity.java

    public void desligarServico() {
            if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                JobScheduler jobScheduler = (JobScheduler)this.getSystemService(Context.JOB_SCHEDULER_SERVICE );
                jobScheduler.cancelAll();
                Log.d(Tag, "Serviço parado (API>=21) com sucesso");
            }
    }

I don’t know if it’s the Thread who lives even after cancelling the Jobscheduler. So much so that I ended up trying to put locationThread.Interrupt(); within the facility onStopJob(), but still unsuccessful.

I’ve tried putting it in the way onStopJob class Jobservice the method jobFinished(jobParameters, false);. But still I could not stop the service completely using the button.

I would like a suggestion on how to resolve this.

Answer 1

I don’t know if it’s Thread who stays alive after canceling Jobscheduler

All indications are yes.
Not only does Thread need to be stopped, but you need to cancel Timer.

Note that a Jobscheduler should be used to perform a task and finish.
Not something to run around waiting for to be finished externally.

If a Thread is used, when finishing, it should call the method jobFinished() to indicate that Jobscheduler can release its wakelock and finish.

If you want the task to run from time to time, set Jobscheduler to periodic.