Work manager class having issue with executing doWork() method

Question

First let me correct please :

Work Manager : The minimum repeat interval that can be defined is 15 minutes (same as the JobScheduler API). If this is not correct please let me know.

I have created below class for executing periodic work request :

object WorkManagerUtils {

fun syncWorkManager() {
    val myConstraints = Constraints.Builder()
            .setRequiredNetworkType(NetworkType.CONNECTED)
            .build()

    val syncRequest = PeriodicWorkRequest
            .Builder(MyWorker::class.java, 20000, TimeUnit.MILLISECONDS)
            .setConstraints(myConstraints)
            .build()

    WorkManager
            .getInstance()
            .enqueueUniquePeriodicWork(
                    Constants.WORKER,
                    ExistingPeriodicWorkPolicy.KEEP,
                    syncRequest)
   }
}

Below is my Worker class. Please check :

class MyWorker(val context: Context, param: WorkerParameters) : Worker(context, param) {
override fun doWork(): Result {
    if (isNetworkAvailable(context)) {
        callSyncApi()
    } else {
        WorkManagerUtils.syncWorkManager()
    }
    return Result.success()
}

private fun callSyncApi() {
        ToastUtils.shortToast(0,"This is working")
   }
 }

Calling this in my Activity as below :

WorkManagerUtils.syncWorkManager()

You can notice that currently I am just displaying toast as my work. I want to check that is this working or not ?

But the toast is not displaying.

Answer 1

Any interval under 15 minutes will be replaced by 15 minutes.

Assuming your ToastUtils.showToast(...) works, I believe work manager chose 15 minutes of interval and the “KEEP” existing work policy prevented rescheduling and testing.

I suggest while testing change the existing work policy to “REPLACE”.

From work manager 1.0.0 source:

public final class PeriodicWorkRequest extends WorkRequest {
    ...
    public static final long MIN_PERIODIC_INTERVAL_MILLIS = 15 * 60 * 1000L; // 15 minutes
    ...
}

public class WorkSpec {
    ...
    public void setPeriodic(long intervalDuration) {
        if (intervalDuration < MIN_PERIODIC_INTERVAL_MILLIS) {
            ...
            IntervalDuration = MIN_PERIODIC_INTERVAL_MILLIS;
        }
    }
    ...
}

There is an overload of setPeriodic function which applies the same interval enforcement.