如何使用 Dagger2 在服务中注入依赖项

Question

我在启动服务的活动中有一个警报管理器。我想获取演示者我的服务的实例。我在我的项目中使用了 Dagger 2 来处理依赖注入。这是我的代码：

我每小时启动/终止服务的活动：

public class ActionsActivity extends ActivityBase {
    @Inject
    ActionsActivityPresenter mPresenter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_actions);
    ((App)getApplication()).getMyComponent()
    .plus(new ActionsActivityModule()).inject(this);
    ..........
    Intent intent = new Intent(this, EventsService.class);
    PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent, 0);
    AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
    alarm.cancel(pendingIntent);
    alarm.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(),minuteInMillies * 60, pendingIntent);
    ........
}

这是我的模块：

@Module(includes = {ContextModule.class, ScannerActivityModule.class})
public class ActionsActivityModule {
.........
@AppScope
@Provides
public RemoveShiftEvent removeShiftEvent(ShiftEventDatabase shiftEventDatabase) {
    return new RemoveShiftEventImpla(shiftEventDatabase);
}
@AppScope
@Provides
public ActionsActivityPresenter actionsActivityPresenter(InsertShiftEvent insertShiftEvent, SendShiftEvent sendShiftEvent, RemoveShiftEvent removeShiftEvent, NameEncryptor nameEncryptor) {
    return new ActionsActivityPresenter(insertShiftEvent, sendShiftEvent, removeShiftEvent, nameEncryptor);
}
......
}

最后是我的服务，目前什么都没有发生

public class EventsService extends Service {
public EventsService() {
}
private ActionsActivityPresenter actionsActivityPresenter;
@Override
public IBinder onBind(Intent intent) {
    // TODO: Return the communication channel to the service.
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    Timber.d( "onStartCommand Service has started");
    return super.onStartCommand(intent, flags, startId);
}
@Override
public void onCreate() {
    super.onCreate();
}

@Override
public void onDestroy() {
    super.onDestroy();
}

我的问题是，有没有办法使用dagger框架在我的服务中注入我的 ActionsActivityPresenter？提前谢谢你。

Answer 1

您可以在服务中使用注入器，例如活动/片段注入器

@Module(includes = [AndroidSupportInjectionModule::class, ActivityBuilderModule::class, ServiceBuilderModule::classs])
abstract class ApplicationModule
{
    @Binds
    @Singleton
    abstract fun bindApplication(application: BeaverApplication): Application
    @Module
    companion object
    {
        @Provides
        @Singleton
        @ApplicationContext
        @JvmStatic
        fun provideApplicationContext(application: BeaverApplication): Context = application
    }
}

就像您使用活动/片段"贡献注入器"一样，对服务执行相同的操作：

@Module
abstract class ServiceBuilderModule
{
    @ContributesAndroidInjector
    abstract fun contributeAuthenticatorService(): AuthenticatorService
}

您从我的项目模板中得到了一个具体示例，其中包含身份验证器服务类