无法使用匕首2注入LinearLayout？

Question

嗨，我尝试使用匕首2.11注入LinearLayout，并且出现以下错误：

Error:(12, 2) error: [dagger.android.AndroidInjector.inject(T)] android.support.v7.widget.LinearLayoutManager cannot be provided without an @Inject constructor or from an @Provides- or @Produces-annotated method.
public abstract interface ApplicationComponent extends dagger.android.AndroidInjector<dagger.android.DaggerApplication> {
                ^
      android.support.v7.widget.LinearLayoutManager is injected at
          com.MyClass.linearLayoutManager
      com.MyClass is injected at
          dagger.android.AndroidInjector.inject(arg0)

这是我的应用程序模块

 @Module
    companion object {

   @Provides
    @Singleton
        @JvmStatic
        fun provideApplicationContext(application: MyApplication): Context = application

        @Provides
        @Singleton
        @JvmStatic
        fun provideSharedPreference(application: MyApplication): SharedPreferences =
                application.getSharedPreferences(PIANO_PREFERENCE_NAME, Context.MODE_PRIVATE)

        @Provides
        @Singleton
        @JvmStatic
        fun provideInputManagerService(application: MyApplication): InputMethodManager =
                application.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager

//below doesnt work but the above works fine
  @Provides
        @Singleton
        @JvmStatic
        @Named(DagConstants.HORIZONTAL_LAYOUT_MANAGER)
        fun provideVerticalLinearLayout(application: MyApplication): LinearLayoutManager =
                LinearLayoutManager(application, LinearLayoutManager.VERTICAL, false)

        @Provides
        @Singleton
        @JvmStatic
        @Named(DagConstants.VERTICAL_LAYOUT_MANAGER)
        fun provideHorizontalLinearLayout(application: MyApplication): LinearLayoutManager =
                LinearLayoutManager(application, LinearLayoutManager.HORIZONTAL, false)


}

我的课：

 @Inject
    @Named(DagConstants.VERTICAL_LAYOUT_MANAGER)
    lateinit var linearLayoutManager: LinearLayoutManager

注入线性布局失败，但其他所有东西都注入并起作用

Answer 1

您忘记了使用@field:Named将注释定位在字段上：

@Inject
@field:Named(DagConstants.VERTICAL_LAYOUT_MANAGER)
lateinit var linearLayoutManager: LinearLayoutManager