Android Tutorial => Using @Subcomponent instead of...

Example

@Singleton
@Component(modules = AppModule.class)
public interface AppComponent {
    void inject(App app);

    Context provideContext();
    Gson provideGson();

    MainActivityComponent mainActivityComponent(ActivityModule activityModule);
}

@ActivityScope
@Subcomponent(modules = ActivityModule.class)
public interface MainActivityComponent {
    void inject(MainActivity activity);
}

public class MainActivity extends AppCompatActivity {

    @Inject
    Gson mGson;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ((App)getApplication()).getAppComponent()
                .mainActivityComponent(new ActivityModule(this)).inject(this);
    }
}

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Android Dagger 2 Using @Subcomponent instead of @Component(dependencies={...})

Fastest Entity Framework Extensions

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