Android Dagger2错误：必须设置模块

我试着在《匕首2》中做替身。但是，我无法找出这个编译错误：->

…必须设置MyApplicationModule

，这发生在我的

LogInFragment

中。如果有人试图解释这个错误。我真的很高兴

这是我的应用程序类：

public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        MyInjector.initialize(this);
    }
}

这是MyInjector类：

public enum MyInjector {
    INSTANCE;

    MyApplicationComponent myApplicationComponent;


    private MyInjector() {
    }

    public static void initialize(MyApplication myApplication) {

        MyApplicationComponent myApplicationComponent = DaggerMyApplicationComponent.builder()
                .myApplicationModule(new MyApplicationModule(myApplication))
                .build();
        INSTANCE.myApplicationComponent = myApplicationComponent;
    }

    public static MyApplicationComponent get() {
        return INSTANCE.myApplicationComponent;
    }

}

@Component (modules = {MyApplicationModule.class}) 
public interface MyApplicationComponent { 

}

这是MyApplicationComponent类：

public enum MyInjector {
    INSTANCE;

    MyApplicationComponent myApplicationComponent;


    private MyInjector() {
    }

    public static void initialize(MyApplication myApplication) {

        MyApplicationComponent myApplicationComponent = DaggerMyApplicationComponent.builder()
                .myApplicationModule(new MyApplicationModule(myApplication))
                .build();
        INSTANCE.myApplicationComponent = myApplicationComponent;
    }

    public static MyApplicationComponent get() {
        return INSTANCE.myApplicationComponent;
    }

}

@Component (modules = {MyApplicationModule.class}) 
public interface MyApplicationComponent { 

}

这是MyApplicationModule类

@Module
public class MyApplicationModule {

    private final MyApplication myApplication;

    public MyApplicationModule(MyApplication myApplication) {
        this.myApplication = myApplication;
    }

    @Singleton
    @Provides
    SharedPreferences providesSharedPreferences(Context context) {
        return context.getSharedPreferences("My_Pref", Context.MODE_PRIVATE);
    }

    @Singleton
    @Provides
    public Context providesMyApplicationContext() {
        return this.myApplication.getApplicationContext();
    }

    @Singleton
    @Provides
    public LocationManager providesLocationService(Context context) {
        return (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
    }

    @Singleton
    @Provides
    public MyDatabaseManager providesMyDatabaseManager(Context context) {
        return MyDatabaseManager.getInstance(context);
    }

    @Singleton
    @Provides
    public AccountSystemModel providesAccountSystemModel(Context context) {
        return MyDatabaseManager.getInstance(context);
    }

    @Singleton
    @Provides
    public MyApplication providesMyApplication(){
        return this.myApplication;
    }

}

这就是我尝试子范围的地方

@Singleton
@Component(modules = {MyApplicationModule.class}, dependencies = {MyApplicationComponent.class})
public interface LogInComponent {
    LogInPresenter signInPresenter();
}

这是MyLogIn组件类

@Singleton
@Component(modules = {MyApplicationModule.class}, dependencies = {MyApplicationComponent.class})
public interface LogInComponent {
    LogInPresenter signInPresenter();
}

这就是发生编译错误的地方

这是MyLogInActivityFragment

@Override protected void injectDependencies() {
   logInComponent = DaggerLogInComponent.builder()
                    .myApplicationComponent(MyInjector.get())
                    .build();
}

---

您的

LogInComponent

依赖于包含

MyApplicationModule

的

MyApplicationComponent

。您不应该在

LogInComponent

中也声明相同的模块。删除它，它将编译

---

另外，通过将依赖项添加到组件接口，确保在

MyApplicationComponent

的

LogInComponent

中公开所需的依赖项，如下所示：

@Component (modules = {MyApplicationModule.class}) 
public interface MyApplicationComponent { 
    Context context();
    SharedPreferences sharedPreferences();
    // ...
}

---

---

另一个提示–如果您需要MyApplicationComponent中的所有依赖项，您可能需要阅读。

此错误可能是由

抽象类

模块引起的。如果模块是抽象类，Dagger就不能使用它们。

我使用Android Studio将我的模块代码从Java转换为Kotlin，它将我的公共类变成了一个对象，从而导致了同样的问题。