Android Development Masterclass/

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Scheduling Tasks with Work a Manager

Scheduling Tasks with Work a Manager

Learn how to schedule tasks using work managers.

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Introduction

Work managers provide APIs that let us schedule background tasks. They provide easy-to-use APIs and fine-grained controls on task execution, as well as robust scheduling APIs with retrial and chaining for complex tasks.

Let’s learn how to schedule tasks using work managers.

Schedule tasks with a delay

We can use work managers to schedule a task after a specified time duration. First, we define a class for our task by extending the Worker class. For example, let’s create a task to generate a random number less than 1100 and return success if the number is less than 750.

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import android.content.Context
import androidx.work.Data
import androidx.work.Worker
import androidx.work.WorkerParameters
import androidx.work.workDataOf
import java.util.*
class GenerateRandomNumberWorker(appContext: Context, workerParams: WorkerParameters) :
    Worker(appContext, workerParams) {
    override fun doWork(): Result {
        val r = Random()
        val nextNum = r.nextInt(1100)
        return when {
            nextNum <= 750 -> {
                val output: Data = workDataOf("randomNumber" to nextNum)
                Result.success(output)
            }
            else -> {
                Result.failure()
            }
        }
    }
}
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