java – Dagger：POJO中的场注入

我从未尝试过Guide或其他DI库,但尝试使用Dagger from square for Android应用程序.它适用于Frgements,但不适用于POJO. user guide假设有关DI的一些知识,因为它没有更详细地解释.我该怎么做才能将restAdapater注入我的POJO.如果我使用相同的代码进行字段注入,它可以在Fragment中使用.

public class MyApplication extends Application {
    private ObjectGraph objectGraph;

    @Override
    public void onCreate() {
        super.onCreate();
        objectGraph = ObjectGraph.create(new DIModule(this));

    }

    public ObjectGraph objectGraph() {
        return objectGraph;
    }

    public void inject(Object object) {
        objectGraph.inject(object);
    }

    ...
    @Module(entryPoints = { 
    MainActivity.class,.....,Auth.class,RestAdapter.class
    })
    static class DIModule {@Provides
        @Singleton
        public RestAdapter provideRestAdapter() {
            return new RestAdapter.Builder().setServer(
                    new Server(Const.BASE_URL)).build();
        }
    }
}

// POJO

public class Auth {

    @Inject
    RestAdapter restAdapater;


    String Username;
    String Password;

    public String authenticate() {
     ...

     Api api = restAdapater.create(..)  // **restAdapater is null**

     }
}

所有碎片都来自下面,DI工作正常.在最近的talk by Eric burke中,他解释说这是必要的,因为Android构造了对象.

public class BaseFragment extends Fragment {
    @Override
    public void onCreate(Bundle state) {
        super.onCreate(state);

        ((MyApplication) getActivity()
                .getApplication())
                .inject(this);
    }

}

Auth auth = objectGraph.get(Auth.class);