Work Manager, the new Advanced Alarm Manager | Supports API 14+ | Works even in Doze Mode

Google has already developed an advanced version of Alarm Manager which has much more modern functionality and works in a battery-efficient manner.

Since Android Oreo and above, Google has introduced doze mode which suspends almost all the Alarm Manager requests. This keeps the alarms from ringing until the mobile wakes up from doze mode. Many developers have complained a lot about this functionality been jeoparding the normal behavior of their apps. Some have found workarounds, while some have limited the background work in their application but most of the developers don't know that Google has already developed an advanced version of Alarm Manager which has much more modern functionality and works in a battery-efficient manner. 

Credits: https://developer.android.com/

What is Work Manager?

Work manager is Google's new API which schedules asynchronous tasks and does the background work in a very efficient way even when device restarts or app exits. Work Manager is backwards compatible till Android 4.4 where it uses Alarm Manager and from Android Oreo onwards it uses job scheduler to dispatch the task. 

Types of Work:

There are two types of work: One-time work and periodic repeating work. One time work, as the name suggests, is a one time request which needs to be performed on the background thread. Periodic Work, on the other hand, is used to perform repeating periodic tasks in the background even after the application has exited long back.

How to use Work Manager:

Add the dependency for Work Manager :

[Java Version
implementation "androidx.work:work-runtime:2.4.0"
Kotlin Version
implementation "androidx.work:work-runtime-ktx:2.4.0"]

 To create a periodic work request, add the following lines:

[WorkRequest uploadWorkRequest = new PeriodicWorkRequest.Builder(NotificationWorker.class, 1, TimeUnit.DAYS).build();
WorkManager.getInstance(c).enqueue(uploadWorkRequest);]

Now write the background task, you want to perform here:

[public class NotificationWorker extends Worker {
private static Context context;
public NotificationWorker(
@NonNull Context context,
@NonNull WorkerParameters params) {
super(context, params);
this.context = context;
}
@Override
public Result doWork() {
try {
//TODO YOUR PREFERRED BACKGROUND TASK
return Result.success();
} catch (Exception e) {
e.printStackTrace();
return Result.failure();
}
}
}] 

 Thats it. You have successfully implemented periodic work requests using the Work Manager. 

To schedule periodic Work Manager tasks with Alarm Manager, instead of your usual Alarm Manager code, write this code :

[alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, timeinmillis,notifyPendingIntent);]

This line will wake Alarm Manager even when it is in doze mode and will work without any problems in Android Oreo and above versions.