Dagger Android可以自定义类吗？

Question

我正在尝试使用Conductor(或任何自定义类)进行dagger-android工作.我尝试复制AndroidSupportInjectionModule(和朋友)所做的一切,在我看来,这是一种自定义类处理.

但是我得到了

C:\Users\ursus\AndroidStudioProjects\...\ControllersModule.java:15: error: com.foo.bar.ChannelsController is not a framework type
    public abstract com.foo.bar.ChannelsController channelsController();

所以,我的"库"代码

package com.foo.bar

import com.bluelinelabs.conductor.Controller;
import dagger.Module;
import dagger.android.AndroidInjectionModule;
import dagger.android.AndroidInjector;
import dagger.internal.Beta;
import dagger.multibindings.Multibinds;

import java.util.Map;

@Beta
@Module(includes = AndroidInjectionModule.class)
public abstract class ConductorInjectionModule {

    private ConductorInjectionModule() {
    }

    @Multibinds
    abstract Map<Class<? extends Controller>, AndroidInjector.Factory<? extends Controller>> controllerInjectorFactories();

    @Multibinds
    abstract Map<String, AndroidInjector.Factory<? extends Controller>> controllerInjectorFactoriesWithStringKeys();
}

我甚至没有编译,所以假设粘贴ConductorInjection和HasControllerInjector毫无意义

用法:

@Module
abstract class AppModule {
    @ContributesAndroidInjector abstract fun mainActivity(): MainActivity
    @ContributesAndroidInjector abstract fun channelsController(): ChannelsController
}

class App : Application(), HasActivityInjector, HasControllerInjector {

    @Inject lateinit var activityInjector: DispatchingAndroidInjector<Activity>
    @Inject lateinit var controllerInjector: DispatchingAndroidInjector<Controller>

    private lateinit var appComponent: AppComponent

    override fun onCreate() {
        super.onCreate()

        appComponent = DaggerAppComponent.builder()
            .applicationContext(this)
            .build()
            .apply {
                inject(this@App)
            }
    }

    override fun activityInjector() = activityInjector
    override fun controllerInjector() = controllerInjector
}

@Singleton
@Component(
    modules = [
        AndroidInjectionModule::class,
        ConductorInjectionModule::class,
        AppModule::class,
        NetModule::class
    ]
)
interface AppComponent {

    fun inject(app: App)

    @Component.Builder
    interface Builder {

        @BindsInstance
        fun applicationContext(context: Context): Builder

        fun build(): AppComponent
    }
}


implementation deps.dagger.runtime
implementation deps.dagger.androidRuntime
kapt deps.dagger.compiler
kapt deps.dagger.androidCompiler

哪里都是"2.19"版本(试过2.16)

AGP"com.android.tools.build:gradle:3.3.0-rc02"(试过3.2.1稳定)

任何线索？在我的脑海里这一切应该工作为同样的事情dagger-android-support呢

Answer 1

错误:com.foo.bar.ChannelsController不是框架类型

所以要回答的问题是,"dagger-android如何知道框架类型是什么".

答案可以在2.19和2.20之间的Dagger-Android提交中找到,他们"删除了旧的处理方式以更好地兼容AndroidX".

我们可以在/sf/answers/3772424631/中看到,

   /**    
    * Returns the Android framework types available to the compiler, keyed by their associated {@code 
    * dagger.android} {@link MapKey}s. This will always contain the types that are defined by the 
    * framework, and only contain the support library types if they are on the classpath of the   
    * current compilation.    
    */    
   static ImmutableMap<Class<? extends Annotation>, TypeMirror> frameworkTypesByMapKey(   
       Elements elements) {   
     return ImmutableMap.copyOf(  
         Stream.of(   
                 elements.getPackageElement("dagger.android"),    
                 elements.getPackageElement("dagger.android.support"))    
             .filter(packageElement -> packageElement != null)    
             .flatMap(packageElement -> typesIn(packageElement.getEnclosedElements()).stream())   
             .filter(AndroidMapKeys::isNotAndroidInjectionKey)    
             .filter(type -> isAnnotationPresent(type, MapKey.class)) 
             .filter(mapKey -> mapKey.getAnnotation(MapKey.class).unwrapValue())  
             .flatMap(AndroidMapKeys::classForAnnotationElement)  
             .collect(toMap(key -> key, key -> mapKeyValue(key, elements)))); 
   }

他们有代码检查自己的@MapKey类型dagger.android和dagger.android.support包,看起来像这样:

// java/dagger/android/support/FragmentKey.java

 @Beta  
 @MapKey    
 @Documented    
 @Target(METHOD)    
 @Deprecated    
 public @interface FragmentKey {    
   Class<? extends Fragment> value();   
 }

因此,他们根据和包@MapKey中可用的内容读取框架类型.dagger.androiddagger.android.support

显然他们在2.20中删除了这张支票,所以现在你可以注入你想要的任何东西.麾!

但除此之外,你实际上可以破解它,这样你会添加的方式@ControllerKey和@ViewKey在dagger.android项目中的包,它会实际上有可能与2.19的工作.

在该提交中也删除了在"不是框架类型"中检查错误的测试.

一只手

@Multibinds
abstract Map<String, AndroidInjector.Factory<? extends Controller>> controllerInjectorFactoriesWithStringKeys();

您也可以使用2.20删除此部件,现在只需要AndroidInjectionModule.