Google Developers Indonesia Blog: WorkManager berpadu dengan Kotlin

WorkManager berpadu dengan Kotlin

28 June 2019

code { background-color: transparent }

Ilustrasi oleh Virginia Poltrack

WorkManagerAndroid Jetpack

Apa itu WorkManager dan kapan menggunakan WorkManager

Cara menggunakan WorkManager API untuk menjadwalkan Pekerjaan

Menggunakan WorkManager di Kotlin

Class CoroutineWorker

Cara menguji class CoroutineWorker Anda menggunakan TestListenableWorkerBuilder.

WorkManager di Kotlinlibrary KTXcatatan rilis

Lebih ringkas dan idiomatisData myData = new Data.Builder() .putInt(KEY_ONE_INT, aInt) .putIntArray(KEY_ONE_INT_ARRAY, aIntArray) .putString(KEY_ONE_STRING, aString) .build();workDataOfinline fun workDataOf(vararg pairs: Pair<String, Any?>): Dataval data = workDataOf( KEY_MY_INT to myIntVar, KEY_MY_INT_ARRAY to myIntArray, KEY_MY_STRING to myString ) CoroutineWorkerWorkerListenableWorkerRxWorkerCoroutines Kotlinpanduan Threading dalam WorkManagerCoroutineWorker#doWork()class MyWork(context: Context, params: WorkerParameters) : CoroutineWorker(context, params) {override suspend fun doWork(): Result {return try { // Do something Result.success() } catch (error: Throwable) { Result.failure() } } } Tidak seperti Worker, kode ini tidak berjalan pada Executor yang ditetapkan dalam Konfigurasi WorkManager Anda.class MyWork(context: Context, params: WorkerParameters) : CoroutineWorker(context, params) {override suspend fun doWork(): Result = withContext(Dispatchers.IO) {return try { // Do something Result.success() } catch (error: Throwable) { Result.failure() } } } Kebutuhan untuk mengubah Dispatcher yang digunakan CoroutineWorker adalah hal yang jarang terjadi dan Dispatchers.Default merupakan opsi terbaik untuk sebagian besar kasus.codelab ini

Menguji class Workerhalaman dokumentasi pengujian WorkManagerPengujian dengan WorkManager 2.1.0WorkManagerTestInitHelper#getTestDriver()@RunWith(JUnit4::class) class MyWorkTest { private lateinit var context: Context @Before fun setup() { context = ApplicationProvider.getApplicationContext() } @Test fun testMyWork() { // Get the ListenableWorker val worker = TestListenableWorkerBuilder<MyWork>(context).build() // Run the worker synchronously val result = worker.startWork().get() assertThat(result, `is`(Result.success())) } }class MyWork(context: Context, params: WorkerParameters) : CoroutineWorker(context, params) { override suspend fun doWork(): Result { val serverUrl = inputData.getString("SERVER_URL") return try { // Do something with the URL Result.success() } catch (error: TitleRefreshError) { if (runAttemptCount <3) { Result.retry() } else { Result.failure() } } } }@Test fun testMyWorkRetry() { val data = workDataOf("SERVER_URL" to "http://fake.url") // Get the ListenableWorker with a RunAttemptCount of 2 val worker = TestListenableWorkerBuilder<MyWork>(context) .setInputData(data) .setRunAttemptCount(2) .build() // Start the work synchronously val result = worker.startWork().get() assertThat(result, `is`(Result.retry())) }@Test fun testMyWorkFailure() { val data = workDataOf("SERVER_URL" to "http://fake.url") // Get the ListenableWorker with a RunAttemptCount of 3 val worker = TestListenableWorkerBuilder<MyWork>(context) .setInputData(data) .setRunAttemptCount(3) .build() // Start the work synchronously val result = worker.startWork().get() assertThat(result, `is`(Result.failure())) }

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