如何在Android体系结构组件中的存储库中访问SharedPrefernces

Question

我是android开发的新手，我在探索android体系结构组件，想在存储库中使用共享首选项，但是共享首选项需要一个应用程序上下文，因此想知道如何将应用程序上下文传递到存储库，因为视图模型不应对该活动进行任何引用所以想找出什么是从Android存储库中的共享首选项中获取数据的最佳方法

Answer 1

We have used Dagger DI approach in our project and tried injecting SharedPreferenceUtils in RepositoryImpl :

 @Singleton
public class SharedPreferenceUtils {

    //region Private Fields
    private SharedPreferences mSharedPreferences;
    private final String TAG = SharedPreferenceUtils.class.getSimpleName();    
    //endregion

    @Inject
    public SharedPreferenceUtils(SharedPreferences mSharedPreferences) {
        this.mSharedPreferences = mSharedPreferences;
    }
}

Then inside AppModule we have provided SharedPreference instance as:

    public class AppModule {
@Provides
    @Singleton
    SharedPreferences providesSharedPreferences(Application application) {
        return PreferenceManager.getDefaultSharedPreferences(application);
    }
}

Then Simply inside our Repository we have used it as:

public class RepoImpl implements Repo{

@Inject
    SharedPreferenceUtils mSharedPreferenceUtils;
}

Hope this helps.