PeriodicWorkRequest not working after device reboot in android oreo

Question

I have requirement of pushing in app notification to user based on following logic.

• Type A notification will be shown after every 24 hours.
• Type B notification will be shown after every 7 days.
• Type C notification will be shown after every 15 days.

I have used PeriodicWorkRequest work manager as follows, it's working fine until the device is restarted. Once device is restarted, my work is NOT getting triggered.

build.gradle ---

implementation 'android.arch.work:work-runtime:1.0.0-alpha04'

Java code

PeriodicWorkRequest showNotification =
                new PeriodicWorkRequest.Builder(ShowNotificationWorkManager.class, interval,
                        TimeUnit.HOURS)
                        .addTag(notificationType)
                        .setInputData(myData)
                        .build();

getWorkManger().enqueue(showNotification);

Answer 1

You called getWorkManger().enqueue(showNotification). Instead, you should enqueue periodic work because yours is a Periodic Operation:

workManager = WorkManager.getInstance(this)
workManager.enqueueUniquePeriodicWork(
   WORKER_NAME, ExistingPeriodicWorkPolicy.KEEP, workRequest
 )

Answer 2

I've tried this code & worked with me on old APIs and new ones: This code which executes the service (workmanager) every 15 min when the device reboots. for AndroidManifest.xml file:

<receiver android:name=".WorkManagerStartReceiver" >
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
        <action android:name="android.intent.action.QUICKBOOT_POWERON" />
    </intent-filter>
</receiver>

And on WorkManagerStartReceiver class:

public class WorkManagerStartReceiver extends BroadcastReceiver {
    WorkManager mWorkManager;

    @Override
    public void onReceive(Context context, Intent intent) {

        PeriodicWorkRequest.Builder myWorkBuilder =
                new PeriodicWorkRequest.Builder(TestWorker.class,
                        PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS,
                        TimeUnit.MILLISECONDS);

        PeriodicWorkRequest myWork = myWorkBuilder.build();
        mWorkManager = WorkManager.getInstance(context);
        mWorkManager.enqueue(myWork);

    }
}

While TestWorker.class is the class that extends Worker:

public class TestWorker extends Worker {

    public TestWorker(@NonNull Context context, @NonNull WorkerParameters workerParams) {
        super(context, workerParams);
    }

    @NonNull
    @Override
    public Result doWork() {

        //your work that you want to execute here
        return null;
    }
}

And this snippet (on MainActivity) that opens when the app opens if you want the service to start working when the app opens.

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

    PeriodicWorkRequest.Builder myWorkBuilder =
            new PeriodicWorkRequest.Builder(TestWorker.class,
                                            PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS,
                                            TimeUnit.MILLISECONDS);
    PeriodicWorkRequest myWork = myWorkBuilder.build();
    WorkManager.getInstance(MainActivity.this)
            .enqueueUniquePeriodicWork("testworker", ExistingPeriodicWorkPolicy.KEEP, myWork);
}