Essential Books

Basic usage

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Create a new JobService

This is done by extending the JobService class and implementing/overriding the required methods onStartJob() and onStopJob(). 

public class MyJobService extends JobService
{
    final String TAG = getClass().getSimpleName();
    
    @Override
    public boolean onStartJob(JobParameters jobParameters) {
        Log.i(TAG, "Job started");

        // ... your code here ...
        
        jobFinished(jobParameters, false);  // signal that we're done and don't want to reschedule the job
        return false;                       // finished: no more work to be done
    }

    @Override
    public boolean onStopJob(JobParameters jobParameters) {
        Log.w(TAG, "Job stopped");
        return false;
    }
}

Add the new JobService to your AndroidManifest.xml

The following step is mandatory, otherwise you won’t be able to run your job:

Declare your MyJobService class as a new <service> element between <application> </application> in your AndroidManifest.xml. 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example">
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service
            android:name=".MyJobService"
            android:permission="android.permission.BIND_JOB_SERVICE" />
    </application>
</manifest>

Setup and run the job

After you implemented a new JobService and added it to your AndroidManifest.xml, you can continue with the final steps. 

public class MainActivity extends AppCompatActivity
{
    final String TAG = getClass().getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void onButtonClick_startJob(View v) {
        // get the jobScheduler instance from current context
        JobScheduler jobScheduler = (JobScheduler) getSystemService(JOB_SCHEDULER_SERVICE);

        // MyJobService provides the implementation for the job
        ComponentName jobService = new ComponentName(getApplicationContext(), MyJobService.class);

        // define that the job will run periodically in intervals of 10 seconds
        JobInfo jobInfo = new JobInfo.Builder(1, jobService).setPeriodic(10 * 1000).build();

        // schedule/start the job
        int result = jobScheduler.schedule(jobInfo);
        if (result == JobScheduler.RESULT_SUCCESS)
            Log.d(TAG, "Successfully scheduled job: " + result);
        else
            Log.e(TAG, "RESULT_FAILURE: " + result);
    }

    public void onButtonClick_stopJob(View v) {
        JobScheduler jobScheduler = (JobScheduler) getSystemService(JOB_SCHEDULER_SERVICE);
        Log.d(TAG, "Stopping all jobs...");
        jobScheduler.cancelAll(); // cancel all potentially running jobs
    }
}

After calling onButtonClick_startJob(), the job will approximately run in intervals of 10 seconds, even when the app is in the paused state (user pressed home button and app is no longer visible).

Instead of cancelling all running jobs inside onButtonClick_stopJob(), you can also call jobScheduler.cancel() to cancel a specific job based on it’s job ID.

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Job Scheduling:
* Job Scheduling
* Basic usage
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162 Creating Overlay always-on-top Windows
163 ExoPlayer
164 Inter-app UI testing with UIAutomator
165 MediaSession
166 Speech to Text Conversion
167 FileProvider
168 Publish .aar file to Apache Archive with Gradle
169 XMPP
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172 AudioManager
173 Job Scheduling
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175 OpenCV
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220 Java on Android
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233 Signing apps for release
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242 Okio
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244 TensorFlow
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251 Enhancing Alert Dialogs
252 Hardware Button Events, Intents PTT
253 SpannableString
254 Looper
255 Optimized VideoView
256 Google Drive API
257 Animated AlertDialog Box
258 Annotation Processor
259 SyncAdapter with periodically do sync of data
260 Singleton Class for Toast Message
261 Fastjson
262 Android Architecture Components
263 Jackson
264 Play Store
265 Loading Bitmaps Effectively
266 Getting system font names
267 Smartcard
268 Convert vietnamese string to english
269 Contributors