具有不同作用域的模块

Question

如何创建一个具有注释的模块，如@UserScope，依赖于另一个模块是@Singleton？

@Module(includes = {ApplicationModule.class}) 
public class JobManagerModule 
{ 
    private static final String TAG = JobManagerModule.class.getSimpleName(); 

    @UserScope 
    @Provides 
    public JobManager providesJobManager(final Context context) 
    { 
     Log.d(TAG, "Providing JobManager"); 
     final Configuration configuration = new Configuration.Builder(context).build(); 
     return new JobManager(configuration); 
    } 
} 

这里，JobManagerModule提供了使用@UserScope但ApplicationModule提供上下文对象（其JobManagerModule需要），为@Singleton。

这显示错误。

Answer 1

如果您要创建不同的Scope，则此范围必须是@Singleton的子组件。

假设你有ApplicationComponent与@Singleton注释：

@Singleton 
@Component(
     modules = ApplicationModule.class 
) 
public interface ApplicationComponent { 

    JobManagerComponent provide(JobManagerModule jobManagerModule); 
} 

ApplicationModule提供Context：

@Module 
public class ApplicationModule { 
    protected final Application mApplication; 

    public ApplicationModule(Application application) { 
     mApplication = application; 
    } 

    @Provides 
    @ApplicationContext 
    public Context provideApplicationContext() { 
     return mApplication; 
    } 
} 

通知书的，ApplicationComponent必须提供JobManagerComponent 和Context设有@ApplicationContext注解。

现在你创建JobManagerComponent作为ApplicationComponent的@Subcomponent：

@UserScope 
@Subcomponent(
     modules = JobManagerModule.class 
) 
public interface JobManagerComponent{ 
} 

JobManagerModule：

@Module 
public class JobManagerModule 
{ 
    private static final String TAG = JobManagerModule.class.getSimpleName(); 

    @UserScope 
    @Provides 
    public JobManager providesJobManager(@ApplicationContext Context context) 
    { 
     Log.d(TAG, "Providing JobManager"); 
     final Configuration configuration = new Configuration.Builder(context).build(); 
     return new JobManager(configuration); 
    } 
} 

通知从@Module注释和Context与@ApplicationContext

创作注释去除：

JobManagerComponent jobComponent = DaggerApplicationComponent.builder() 
    .applicationModule(applicationModule) 
    .build() 
    .provide(new JobManagerModule());