Dagger 2注射法

Question

我正在玩Dagger 2.

我有以下内容Module:

@Module
public class GameSetupModule {
    @Provides
    @Singleton
    GameSetup provideGameSetup() {
        return new GameSetup();
    }
}

和根据Component:

@Singleton
@Component(modules = {GameSetupModule.class})
public interface GameSetupComponent {
    GameSetup provideGameSetup();

    void inject(SetupActivity activity);

//    void inject(Fragment fragment);

    void inject(SetupCompletedFragment fragment);

    void inject(SelectQuarterLengthFragment fragment);

    void inject(SelectTeamColorsFragment fragment);

    void inject(SelectUserRoleFragment fragment);

}

正如您所看到的,GameSetup将注入几个不同的片段,如下所示:

@Inject
GameSetup gameSetup; 

onCreate(){
   getGameSetupComponent().inject(this); 
}

It works fine when implemented as seen above, the injection does not work though when I just use a single method

 void inject(Fragment fragment);

for all Fragments.

Am I doing something wrong or is this even intended to have more control over where the GameSetup may be injected and where it may not be available?

Answer 1

Dagger2不支持开箱即用的基类注射.

一种方法,例如void inject(Fragment fragment);只注入@Inject在Fragment类中指定的字段,而不是其子类.

据Reddit上jackhexen,你在做什么是可能的反射做.但反思可以打破Proguard.

我个人会投票支持这个解决方案.