Android Dagger-2 如何为方法参数提供依赖

Question

我有一个模块 FragmentModule

@Module
public class FragmentModule
{
    @Provides
    public static PickerDashboardFragment providesPickerDashboard(int status, String name, Object someComplexObject)
    {
        PickerDashboardFragment fragment = new PickerDashboardFragment();
        Bundle b = new Bundle();
        b.putInt("status", status);
        b.putString("name", name);
        b.putInt("object", someComplexObject);
        fragment.setArguments(bundle);
        return fragment;
    }

    @Provides
    public static PickingFragment providesPickingFragment()
    {
        PickingFragment fragment = new PickingFragment();
        return fragment;
    }
}

这是我的组件类

@Component(modules = {UtilModule.class, FragmentModule.class})
public interface ApplicationComponent
{
    void inject(PickerDashboardActivity target);
}

在我的 Activity 中，这就是我注入(inject) PickerDashboardActivity

的方式

@Inject 
PickerDashboardFragment frag;

ApplicationComponent component = DaggerApplicationComponent.builder().build();
        component.inject(this);

我的问题是什么是为PickerDashboardFragment providesPickerDashboard(int status, String name, Object someComplexObject) 提供依赖项的最好和最简单的方法，即状态、名称和 someComplexObject。

最好的问候

Answer 1

像这样向您的模块添加属性和Provides 方法:

@Module
public class FragmentModule
{

    private final int status;
    private final String name;
    private final Object someComplexObject;

    public FragmentModule(int status, String name, Object someComplexObject) {
        this.status = status;
        this.name = name;
        this.someComplexObject = someComplexObject;
    }

    @Provides
    int providesStatus() {
        return status;
    }

    @Provides
    String providesName() {
        return name;
    }

    @Provides
    Object providesSomeComplexObject() {
        return someComplexObjext;
    }

    @Provides
    public static PickerDashboardFragment providesPickerDashboard(int status, String name, Object someComplexObject)
    {
        PickerDashboardFragment fragment = new PickerDashboardFragment();
        Bundle b = new Bundle();
        b.putInt("status", status);
        b.putString("name", name);
        b.putInt("object", someComplexObject);
        fragment.setArguments(bundle);
        return fragment;
    }

    @Provides
    public static PickingFragment providesPickingFragment()
    {
        PickingFragment fragment = new PickingFragment();
        return fragment;
    }
}

拥有一个提供 int 和 String 的模块可能会让您使用一些限定符(例如 Named)以避免冲突