相关疑难解决方法(0)

我正在阅读GitHub上的Dagger2组件范围测试的源代码,我看到为被调用的活动定义了"自定义范围" @ActivityScope,但我在其他项目中看到了它,包括具有其范围的4模块CleanArchitecture@PerActivity.

但从字面上看,@ActivityScope注释的代码如下:

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

import javax.inject.Scope;

/**
 * Created by joesteele on 2/15/15.
 */
@Scope
@Retention(RetentionPolicy.RUNTIME)
public @interface ActivityScope {
}

它在模块中"神奇地"可用:

@Module
public class ActivityModule {
  @Provides @ActivityScope Picasso providePicasso(ComponentTest app, OkHttpClient client) {
    return new Picasso.Builder(app)
        .downloader(new OkHttpDownloader(client))
        .listener(new Picasso.Listener() {
          @Override public void onImageLoadFailed(Picasso picasso, Uri uri, Exception e) {
            Log.e("Picasso", "Failed to load image: " + uri.toString(), e);
          }
        })
        .build();
  }
}

或者CleanArchitecture …