Memastikan ketersediaan API dengan ModuleInstallClient

Seperti yang dijelaskan di Ringkasan layanan Google Play SDK yang didukung oleh layanan Google Play didukung oleh layanan di perangkat di perangkat Android bersertifikasi Google. Untuk menghemat penyimpanan dan memori di seluruh seluruh armada perangkat, beberapa layanan dipasang sesuai permintaan ketika jelas bahwa perangkat tertentu memerlukan fungsionalitas yang relevan. Misalnya, ML Kit menyediakan opsi ini saat menggunakan model di layanan Google Play.

Kasus yang paling umum adalah mengunduh layanan (atau “modul”) dan diinstal secara paralel dengan aplikasi yang memerlukannya, berdasarkan dependensi di AndroidManifest.xml SDK. Untuk kontrol lebih besar, modul API penginstalan menyediakan kemampuan untuk secara eksplisit memeriksa ketersediaan modul, modul permintaan penginstalan, memantau status permintaan, dan menangani error.

Ikuti langkah-langkah di bawah untuk memastikan ketersediaan API dengan ModuleInstallClient. Perhatikan bahwa cuplikan kode di bawah ini menggunakan TensorFlow Lite SDK (play-services-tflite-java) sebagai library contoh, tetapi langkah-langkah ini berlaku untuk library apa pun yang terintegrasi dengan OptionalModuleApi. Ini kami akan diperbarui dengan informasi tambahan seiring dengan makin banyaknya SDK yang menambahkan dukungan.

Sebelum memulai

Untuk mempersiapkan aplikasi Anda, selesaikan langkah-langkah di bagian berikut ini.

Prasyarat aplikasi

Pastikan bahwa file build aplikasi Anda menggunakan nilai berikut:

  • minSdkVersion dari 19 atau yang lebih tinggi

Mengonfigurasi aplikasi Anda

  1. Di file settings.gradle tingkat teratas, sertakan Repositori Maven Google dan Repositori pusat Maven dalam Blok dependencyResolutionManagement:

    dependencyResolutionManagement {
    repositories {
        google()
        mavenCentral()
    }
}

  2. Dalam file build Gradle modul Anda (biasanya app/build.gradle), tambahkan metode Dependensi layanan Google Play untuk play-services-base dan play-services-tflite-java:

    dependencies {
  implementation 'com.google.android.gms:play-services-base:18.5.0'
  implementation 'com.google.android.gms:play-services-tflite-java:16.2.0-beta02'
}

Memeriksa ketersediaan modul

  1. Dapatkan instance ModuleInstallClient:

    Kotlin

    val moduleInstallClient = ModuleInstall.getClient(context)

    Java

    ModuleInstallClient moduleInstallClient = ModuleInstall.getClient(context);

  2. Periksa ketersediaan modul opsional menggunakan OptionalModuleApi-nya:

    Kotlin

    val optionalModuleApi = TfLite.getClient(context)
moduleInstallClient
  .areModulesAvailable(optionalModuleApi)
  .addOnSuccessListener {
    if (it.areModulesAvailable()) {
      // Modules are present on the device...
    } else {
      // Modules are not present on the device...
    }
  }
  .addOnFailureListener {
    // Handle failure...
  }

    Java

    OptionalModuleApi optionalModuleApi = TfLite.getClient(context);
moduleInstallClient
    .areModulesAvailable(optionalModuleApi)
    .addOnSuccessListener(
        response -> {
          if (response.areModulesAvailable()) {
            // Modules are present on the device...
          } else {
            // Modules are not present on the device...
          }
        })
    .addOnFailureListener(
        e -> {
          // Handle failure…
        });

Mengirim permintaan penginstalan yang ditangguhkan

  1. Dapatkan instance ModuleInstallClient:

    Kotlin

    val moduleInstallClient = ModuleInstall.getClient(context)

    Java

    ModuleInstallClient moduleInstallClient = ModuleInstall.getClient(context);

  2. Mengirim permintaan yang ditangguhkan:

    Kotlin

    val optionalModuleApi = TfLite.getClient(context)
moduleInstallClient.deferredInstall(optionalModuleApi)

    Java

    OptionalModuleApi optionalModuleApi = TfLite.getClient(context);
moduleInstallClient.deferredInstall(optionalModuleApi);

Mengirim permintaan penginstalan modul yang mendesak

  1. Dapatkan instance ModuleInstallClient:

    Kotlin

    val moduleInstallClient = ModuleInstall.getClient(context)

    Java

    ModuleInstallClient moduleInstallClient = ModuleInstall.getClient(context);

  2. (Opsional) Buat InstallStatusListener untuk menangani status penginstalan pembaruan.

    Jika Anda ingin memantau kemajuan unduhan di UI yang disesuaikan (untuk misalnya, status progres), Anda dapat membuat InstallStatusListener untuk menerima pembaruan status penginstalan.

    Kotlin

    inner class ModuleInstallProgressListener : InstallStatusListener {
  override fun onInstallStatusUpdated(update: ModuleInstallStatusUpdate) {
    // Progress info is only set when modules are in the progress of downloading.
    update.progressInfo?.let {
      val progress = (it.bytesDownloaded * 100 / it.totalBytesToDownload).toInt()
      // Set the progress for the progress bar.
      progressBar.setProgress(progress)
    }

    if (isTerminateState(update.installState)) {
      moduleInstallClient.unregisterListener(this)
    }
  }

  fun isTerminateState(@InstallState state: Int): Boolean {
    return state == STATE_CANCELED || state == STATE_COMPLETED || state == STATE_FAILED
  }
}

val listener = ModuleInstallProgressListener()

    Java

    static final class ModuleInstallProgressListener implements InstallStatusListener {
    @Override
    public void onInstallStatusUpdated(ModuleInstallStatusUpdate update) {
      ProgressInfo progressInfo = update.getProgressInfo();
      // Progress info is only set when modules are in the progress of downloading.
      if (progressInfo != null) {
        int progress =
            (int)
                (progressInfo.getBytesDownloaded() * 100 / progressInfo.getTotalBytesToDownload());
        // Set the progress for the progress bar.
        progressBar.setProgress(progress);
      }
      // Handle failure status maybe…

      // Unregister listener when there are no more install status updates.
      if (isTerminateState(update.getInstallState())) {

        moduleInstallClient.unregisterListener(this);
      }
    }

    public boolean isTerminateState(@InstallState int state) {
      return state == STATE_CANCELED || state == STATE_COMPLETED || state == STATE_FAILED;
    }
  }

InstallStatusListener listener = new ModuleInstallProgressListener();

  3. Konfigurasikan ModuleInstallRequest dan tambahkan OptionalModuleApi ke permintaan:

    Kotlin

    val optionalModuleApi = TfLite.getClient(context)
val moduleInstallRequest =
  ModuleInstallRequest.newBuilder()
    .addApi(optionalModuleApi)
    // Add more APIs if you would like to request multiple optional modules.
    // .addApi(...)
    // Set the listener if you need to monitor the download progress.
    // .setListener(listener)
    .build()

    Java

    OptionalModuleApi optionalModuleApi = TfLite.getClient(context);
ModuleInstallRequest moduleInstallRequest =
    ModuleInstallRequest.newBuilder()
        .addApi(optionalModuleApi)
        // Add more API if you would like to request multiple optional modules
        //.addApi(...)
        // Set the listener if you need to monitor the download progress
        //.setListener(listener)
        .build();

  4. Kirim permintaan penginstalan:

    Kotlin

    moduleInstallClient
  .installModules(moduleInstallRequest)
  .addOnSuccessListener {
    if (it.areModulesAlreadyInstalled()) {
      // Modules are already installed when the request is sent.
    }
  }
  .addOnFailureListener {
    // Handle failure…
  }

    Java

    moduleInstallClient.installModules(moduleInstallRequest)
    .addOnSuccessListener(
        response -> {
          if (response.areModulesAlreadyInstalled()) {
            // Modules are already installed when the request is sent.
          }
        })
    .addOnFailureListener(
        e -> {
          // Handle failure...
        });

Pengujian lokal dengan FakeModuleInstallClient

SDK layanan Google Play menyediakan FakeModuleInstallClient yang memungkinkan Anda untuk menyimulasikan hasil API penginstalan modul dalam pengujian menggunakan dependensi tanpa injeksi.

Prasyarat aplikasi

Mengonfigurasi aplikasi Anda untuk digunakan Framework injeksi dependensi Hilt.

Ganti ModuleInstallClient dengan FakeModuleInstallClient dalam pengujian

  1. Tambahkan dependensi:

    Dalam file build Gradle modul Anda (biasanya app/build.gradle), tambahkan metode Dependensi layanan Google Play untuk play-services-base-testing di uji coba.

      dependencies {
    // other dependencies...

    testImplementation 'com.google.android.gms:play-services-base-testing:16.1.0'
  }

  2. Buat modul Hilt untuk menyediakan ModuleInstallClient:

    Kotlin

    @Module
@InstallIn(ActivityComponent::class)
object ModuleInstallModule {

  @Provides
  fun provideModuleInstallClient(
    @ActivityContext context: Context
  ): ModuleInstallClient = ModuleInstall.getClient(context)
}

    Java

    @Module
@InstallIn(ActivityComponent.class)
public class ModuleInstallModule {
  @Provides
  public static ModuleInstallClient provideModuleInstallClient(
    @ActivityContext Context context) {
    return ModuleInstall.getClient(context);
  }
}

  3. Injeksikan ModuleInstallClient dalam aktivitas:

    Kotlin

    @AndroidEntryPoint
class MyActivity: AppCompatActivity() {
  @Inject lateinit var moduleInstallClient: ModuleInstallClient

  ...
}

    Java

    @AndroidEntryPoint
public class MyActivity extends AppCompatActivity {
  @Inject ModuleInstallClient moduleInstallClient;

  ...
}

  4. Ganti binding dalam pengujian:

    Kotlin

    @UninstallModules(ModuleInstallModule::class)
@HiltAndroidTest
class MyActivityTest {
  ...
  private val context:Context = ApplicationProvider.getApplicationContext()
  private val fakeModuleInstallClient = FakeModuleInstallClient(context)
  @BindValue @JvmField
  val moduleInstallClient: ModuleInstallClient = fakeModuleInstallClient

  ...
}

    Java

    @UninstallModules(ModuleInstallModule.class)
@HiltAndroidTest
class MyActivityTest {
  ...
  private static final Context context = ApplicationProvider.getApplicationContext();
  private final FakeModuleInstallClient fakeModuleInstallClient = new FakeModuleInstallClient(context);
  @BindValue ModuleInstallClient moduleInstallClient = fakeModuleInstallClient;

  ...
}

Menyimulasikan ketersediaan modul

Kotlin

@Test
fun checkAvailability_available() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset()

  val availableModule = TfLite.getClient(context)
  fakeModuleInstallClient.setInstalledModules(api)

  // Verify the case where modules are already available...
}

@Test
fun checkAvailability_unavailable() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset()

  // Do not set any installed modules in the test.

  // Verify the case where modules unavailable on device...
}

@Test
fun checkAvailability_failed() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset()

  fakeModuleInstallClient.setModulesAvailabilityTask(Tasks.forException(RuntimeException()))

  // Verify the case where an RuntimeException happened when trying to get module's availability...
}

Java

@Test
public void checkAvailability_available() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset();

  OptionalModuleApi optionalModuleApi = TfLite.getClient(context);
  fakeModuleInstallClient.setInstalledModules(api);

  // Verify the case where modules are already available...
}

@Test
public void checkAvailability_unavailable() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset();

  // Do not set any installed modules in the test.

  // Verify the case where modules unavailable on device...
}

@Test
public void checkAvailability_failed() {
  fakeModuleInstallClient.setModulesAvailabilityTask(Tasks.forException(new RuntimeException()));

  // Verify the case where an RuntimeException happened when trying to get module's availability...
}

Menyimulasikan hasil untuk permintaan penginstalan yang ditangguhkan

Kotlin

@Test
fun deferredInstall_success() {
  fakeModuleInstallClient.setDeferredInstallTask(Tasks.forResult(null))

  // Verify the case where the deferred install request has been sent successfully...
}

@Test
fun deferredInstall_failed() {
  fakeModuleInstallClient.setDeferredInstallTask(Tasks.forException(RuntimeException()))

  // Verify the case where an RuntimeException happened when trying to send the deferred install request...
}

Java

@Test
public void deferredInstall_success() {
  fakeModuleInstallClient.setDeferredInstallTask(Tasks.forResult(null));

  // Verify the case where the deferred install request has been sent successfully...
}

@Test
public void deferredInstall_failed() {
  fakeModuleInstallClient.setDeferredInstallTask(Tasks.forException(new RuntimeException()));

  // Verify the case where an RuntimeException happened when trying to send the deferred install request...
}

Simulasikan hasil untuk permintaan penginstalan mendesak

Kotlin

@Test
fun installModules_alreadyExist() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset();

  OptionalModuleApi optionalModuleApi = TfLite.getClient(context);
  fakeModuleInstallClient.setInstalledModules(api);

  // Verify the case where the modules already exist when sending the install request...
}

@Test
fun installModules_withoutListener() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset();

  // Verify the case where the urgent install request has been sent successfully...
}

@Test
fun installModules_withListener() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset();

  // Generates a ModuleInstallResponse and set it as the result for installModules().
  val moduleInstallResponse = FakeModuleInstallUtil.generateModuleInstallResponse()
  fakeModuleInstallClient.setInstallModulesTask(Tasks.forResult(moduleInstallResponse))

  // Verify the case where the urgent install request has been sent successfully...

  // Generates some fake ModuleInstallStatusUpdate and send it to listener.
  val update = FakeModuleInstallUtil.createModuleInstallStatusUpdate(
    moduleInstallResponse.sessionId, STATE_COMPLETED)
  fakeModuleInstallClient.sendInstallUpdates(listOf(update))

  // Verify the corresponding updates are handled correctly...
}

@Test
fun installModules_failed() {
  fakeModuleInstallClient.setInstallModulesTask(Tasks.forException(RuntimeException()))

  // Verify the case where an RuntimeException happened when trying to send the urgent install request...
}

Java

@Test
public void installModules_alreadyExist() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset();

  OptionalModuleApi optionalModuleApi = TfLite.getClient(context);
  fakeModuleInstallClient.setInstalledModules(api);

  // Verify the case where the modules already exist when sending the install request...
}

@Test
public void installModules_withoutListener() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset();

  // Verify the case where the urgent install request has been sent successfully...
}

@Test
public void installModules_withListener() {
  // Reset any previously installed modules.
  fakeModuleInstallClient.reset();

  // Generates a ModuleInstallResponse and set it as the result for installModules().
  ModuleInstallResponse moduleInstallResponse =
      FakeModuleInstallUtil.generateModuleInstallResponse();
  fakeModuleInstallClient.setInstallModulesTask(Tasks.forResult(moduleInstallResponse));

  // Verify the case where the urgent install request has been sent successfully...

  // Generates some fake ModuleInstallStatusUpdate and send it to listener.
  ModuleInstallStatusUpdate update = FakeModuleInstallUtil.createModuleInstallStatusUpdate(
      moduleInstallResponse.getSessionId(), STATE_COMPLETED);
  fakeModuleInstallClient.sendInstallUpdates(ImmutableList.of(update));

  // Verify the corresponding updates are handled correctly...
}

@Test
public void installModules_failed() {
  fakeModuleInstallClient.setInstallModulesTask(Tasks.forException(new RuntimeException()));

  // Verify the case where an RuntimeException happened when trying to send the urgent install request...
}