Job Scheduler not running within set interval

Question

I'm trying to use the android Job Scheduler API and all I'm trying to do is have the Job Scheduler run every 5 seconds. However when I run it, the corresponding service is hit every two minutes. I have a log that documents every time the service is hit. I'm not sure why this is happening. Could the Job Scheduler have a minimum interval time. My code is simply...

JobInfo jobInfo = new JobInfo.Builder(1, new ComponentName(this, UpdateDatabaseService.class))
            .setPeriodic(5000)
            .build();

JobScheduler jobScheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);
jobScheduler.schedule(jobInfo);

The problem originally arose when I was trying to run a daily task but it would trigger the service multiple times within that day and wouldn't follow the time guideline.

Let me know what you think.

Well, on Android 5.1, [`AlarmManager` has an undocumented lower limit of a one-minute polling period](http://commonsware.com/blog/2015/03/23/alarmmanager-regression-android-5p1.html). Perhaps there is something similar at work here. IMHO, using either `AlarmManager` or `JobScheduler` for every-five-second work is inappropriate, as polling that quickly really should only be done by a foreground process that's already running. — CommonsWare, Apr 07 '15 at 12:58

jmarkstar · Answer 1 · 2017-12-15T18:52:13.020

I was having this problem and after review some blogs and the official documentation, I realised that JobScheduler is having difference behavior on Android N(24 and 25). JobScheduler works with a minimum periodic of 15 mins.

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public static void setJobScheduler(Context context){
        Log.v(TAG, "Job Scheduler is starting");
        JobScheduler jobScheduler = (JobScheduler)context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
        ComponentName serviceName = new ComponentName(context, JobService.class);
        JobInfo jobInfo;
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.N){
            jobInfo = new JobInfo.Builder(JOB_ID, serviceName)
                    .setPeriodic(900000)
                    .build();
        }else{
            jobInfo = new JobInfo.Builder(JOB_ID, serviceName)
                    .setPeriodic(Constants.TIME_INTERVAL)
                    .build();
        }
        jobScheduler.schedule(jobInfo);
    }

Confirmed: in Android P (API 28) minimum period is 15 minutes (900000L). — Alberto Gaona, Sep 13 '18 at 22:22

score 6 · Answer 2 · answered Aug 16 '17 at 12:21

6

Instead of setPeriodic(int) use setMinimumLatency(int) with setOverrideDeadline(int). These two methods will adjust the interval of your JobScheduler.

answered Aug 16 '17 at 12:21

Roman Samoilenko

932
12
25

Can you explain? Any example? – Pratik Butani May 20 '19 at 05:35
@PratikButaniAndroidDev you're better off using `WorkManager` now. – Roman Samoilenko May 20 '19 at 06:12
Thank @Roman, I want to get location update and it should be send to server every day. I am new to WorkManager, hope I can achieve that. – Pratik Butani May 20 '19 at 07:08

score 3 · Answer 3 · answered Jun 28 '16 at 20:29

3

You should call jobFinished(jobParams,needResheduleBoolean);, after this call only the job will execute again, this is how the job knows it has finished execution so can start once more.

answered Jun 28 '16 at 20:29

Vaishakh

1,126
10
10

Chirag Sheta · Answer 4 · 2016-10-12T10:26:45.973

JobInfo.Builder builder = new JobInfo.Builder(1,new ComponentName(getPackageName(), JobSchedulerService.class.getName()));

builder.setPeriodic(3000);

Edited

MainActivity.java

public class MainActivity extends Activity {

    private JobScheduler mJobScheduler;
    private Button mScheduleJobButton;
    private Button mCancelAllJobsButton;

    @Override
    protected void onCreate( Bundle savedInstanceState ) {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.activity_main );
        mJobScheduler = (JobScheduler) getSystemService( Context.JOB_SCHEDULER_SERVICE );
        mScheduleJobButton = (Button) findViewById( R.id.schedule_job );
        mCancelAllJobsButton = (Button) findViewById( R.id.cancel_all );

        mScheduleJobButton.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                JobInfo.Builder builder = new JobInfo.Builder( 1,
                        new ComponentName( getPackageName(), JobSchedulerService.class.getName() ) );

                builder.setPeriodic( 3000 );


                if( mJobScheduler.schedule( builder.build() ) <= 0 ) {
                    //If something goes wrong
                }
            }
        });

        mCancelAllJobsButton.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick( View v ) {
                mJobScheduler.cancelAll();
            }
        });
    }
}

just need to change

new JobInfo.Builder(1, new ComponentName(this, UpdateDatabaseService.class))

to

new JobInfo.Builder( 1, new ComponentName( getPackageName(), JobSchedulerService.class.getName() ) )

builder.setPeriodic( 3000 ); will set JobInfo in 3000 ms schedule and called after every 3 seconds.

JobSchedulerService.java

public class JobSchedulerService extends JobService {

    private Handler mJobHandler = new Handler( new Handler.Callback() {
        @Override
        public boolean handleMessage( Message msg ) {
            Toast.makeText( getApplicationContext(), "JobService task running", Toast.LENGTH_SHORT ).show();
            jobFinished( (JobParameters) msg.obj, false );
            return true;
        }
    } );

    @Override
    public boolean onStartJob(JobParameters params ) {
        mJobHandler.sendMessage( Message.obtain( mJobHandler, 1, params ) );
        return true;
    }

    @Override
    public boolean onStopJob( JobParameters params ) {
        mJobHandler.removeMessages( 1 );
        return false;
    }

}

AndroidManifest.xml

<service android:name=".JobSchedulerService"
            android:permission="android.permission.BIND_JOB_SERVICE" />

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/schedule_job"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Schedule Job"/>

    <Button
        android:id="@+id/cancel_all"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Cancel All"/>

</LinearLayout>

@ChiragSheta still there is no explanation to the block of code! — Lalit Poptani, Oct 12 '16 at 09:40
I think the above code wont work in API level 24, cause the minimum interval should be 15 min — Sandeep Dhull, Nov 08 '16 at 06:49
for that you can use `builder.setTriggerContentMaxDelay(2000)` this will call on every 2 second — Chirag Sheta, Nov 09 '16 at 05:38

score 1 · Answer 5 · answered Apr 14 '18 at 10:50

From android documentation of setPeriodic ,

setPeriodic (long intervalMillis) : Specify that this job should recur with the provided interval, not more than once per period. You have no control over when within this interval this job will be executed, only the guarantee that it will be executed at most once within this interval.

so it is clearly mentioned that it is not necessary that job will run during this time. If you want to run a job at some periodic specific time , then you shoulf better use AlarmManager Api with setRepeating() method . Follow this link below for your requirements .

https://developer.android.com/training/scheduling/alarms.html#set

If i use alarmmanager in Android 8(OREO). Alarmmanager gets removed whenever the app is killed. In this case Alarmmanager stops working. Can u suggest workaround for this or any other better way — Uday Ramjiyani, May 21 '18 at 08:04

score 0 · Answer 6 · answered Oct 21 '19 at 10:29

0

You need minimum 30 seconds to wait for next job

answered Oct 21 '19 at 10:29

Pradeep Kumar

2,349
1
10
18

yaa its right, it will take 30 seconds minimum to start new task – Oct 25 '19 at 08:50
1

Is it 30 secs or 15 mins? These are huge differences. – portfoliobuilder Dec 06 '19 at 17:49
It is definitelly 15 mins. You can see it in the source code here: https://android.googlesource.com/platform/frameworks/base/%2B/master/core/java/android/app/job/JobInfo.java#1394 If you set anything less, it will set the interval to the minimum, which as you can see in that file is 15 minutes, with a minimum flex of 5 minutes (meaning it can execute in a window of 5 minutes at the end of that interval) – Pablo Lluch Jan 17 '20 at 00:55

Job Scheduler not running within set interval

6 Answers6

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