scheduler as fuck

Job Service class

public class MyJobService extends JobService {

    private static final String TAG = "MyJobService";

    @Override
    public boolean onStartJob(JobParameters jobParameters) {
        Log.d(TAG, "Job started");
        new JobTask(this).execute(jobParameters);
        return true;
    }

    @Override
    public boolean onStopJob(JobParameters jobParameters) {
        Log.d(TAG, "Job stopped: criteria not met");
        return true;
    }

    private static class JobTask extends AsyncTask<JobParameters, Void, JobParameters> {

        JobService jobService;

        public JobTask(MyJobService myJobService) {
            this.jobService = myJobService;
        }

        @Override
        protected JobParameters doInBackground(JobParameters... jobParameterses) {
            SystemClock.sleep(5000);
            return jobParameterses[0];
        }

        @Override
        protected void onPostExecute(JobParameters jobParameters) {
            super.onPostExecute(jobParameters);
            Log.d(TAG, "Task finished");
            jobService.jobFinished(jobParameters, true);
        }
    }
}


UI class

public class UIActivity extends AppCompatActivity {

    private static final String TAG = "UIActivity";

    Button btn;
    TextView tv;

    JobScheduler jobScheduler;
    JobInfo jobInfo;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ui);
        btn = (Button) findViewById(R.id.btn_start);
        tv = (TextView) findViewById(R.id.tv);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // start schedule
                Log.d(TAG, "button clciked");
                jobScheduler.schedule(jobInfo);
            }
        });

        jobInfo = new JobInfo.Builder(1, new ComponentName(this, MyJobService.class))
                .setPeriodic(30000)
                .setPersisted(true)
                .build();
        jobScheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);
    }

}

manifest

        <service
            android:name="com.example.android.myexample.MyJobService"
            android:permission="android.permission.BIND_JOB_SERVICE"
            android:exported="true"/>