WorkManager

// Import WorkManager dependencies in build.gradle
implementation 'androidx.work:work-runtime-ktx:2.5.0-alpha01'

// The new class class inherits the Worker class with the parameters context, workerParams
// Override the doWork method and add the logic to be executed to Result
class MyWorker(context: Context, workerParams: WorkerParameters) : Worker(context, workerParams) {
    override fun doWork(): Result {
        // val name = inputData.getString(KEY)    // Retrieve the data passed in the task
        Log.d("TAG", "doWork: $name start")
        Thread.sleep(3000)
        Log.d("TAG", "doWork: $name finish")
        // The outputData return value can be added in the success, and the return value type is Pair (KEY, value)
        // return Result.success(workDataOf(Pair(key,value)))
        // Success can also be in to form
        // return Result.success(workDataOf(KEY to value))
        return Result.success()
    }
}

class MainActivity : AppCompatActivity() {
    // Add a single example of WorkerManager to pass the context
    private val workerManager = WorkManager.getInstance(this)
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        button.setOnClickListener {
            // Add a task condition (this condition is a hook when the network is connected)
            val constraints = Constraints.Builder()
                    .setRequiredNetworkType(NetworkType.CONNECTED)  // When the network type is connected
                    .build()
            // Add cascading tasks (multitasking) demos:
            // workerManager.beginWith(workA).then(workB).then(workC).enqueue
            // Add a single job request OneTimeWorkRequestBuilder < type: The Work class > created
            val workRequest = OneTimeWorkRequestBuilder<MyWorker>()
                    .setConstraints(constraints) // Add execution criteria (constraints of the previous section of code)
                    .setInputData(workDataOf(KET to value))  // Pass data to the Created Work class
                    .build()
            workerManager.enqueue(workRequest)   // Add a task queue
            workerManager.getWorkInfoByIdLiveData(workRequest.id).observe(this, Observer {
                if(it.state == WorkInfo.State.SUCCEEDED){
                    Log.d("TAG", " ${it.outputData.getString(KEY)}")
                }
            })
        }

    }
}