需要帮助以在android中编写视图模型代码以获取来自改造的数据

Question

我是android的新手，并且一直在为视图模型编写代码，我不知道如何管理来自存储库和远程服务器的数据，这是我到目前为止已经尝试过的方法，任何帮助将不胜感激。

这是我的存储库数据源

class RepositoryDataSource constructor(private val roomDataSource: QuranLocalDataSource,
                                   private val remoteDataSource: RemoteDataSource) : Repository {

    override fun saveParaData(paraData: List<ParaData>) { roomDataSource.getQuranDao().insertParaData(paraData) }

    override fun saveSurahData(surahData: List<SurahData>) { roomDataSource.getQuranDao().insertSurahData(surahData) }

    //get Parah list from db
    override fun getParaFromDB(): LiveData<List<ParaData>> = roomDataSource.getQuranDao().getParaData()

    //get SurahList from dm
    override fun getSurahDataFromDB(): LiveData<List<SurahData>> = roomDataSource.getQuranDao().getSurahData()

    //get parahList from server
    override fun getParahListFromAPI() {
        remoteDataSource.getParahListFromAPI()
            .subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe({ result ->

                Completable.fromAction {
                    deleteParaData()
                    val data = result.body()
                    saveParaData(data?.get(0)!!.paraData)
                }
                    .subscribeOn(Schedulers.io())
                    .observeOn(AndroidSchedulers.mainThread())
                    .subscribe(object : CompletableSubscriber {
                        override fun onSubscribe(@NonNull subscription : Subscription) {

                        }

                        override fun onCompleted() {
                            Log.i("Repository onCompleted", "DataSource has been Populated")
                        }

                        override fun onError(@NonNull e: Throwable) {
                            e.printStackTrace()
                            Log.e("onError", "DataSource hasn't been Populated")
                        }
                    })

            },
                { error -> Log.e("ERROR", "{$error.message}") },
                { Log.d("getParahListFromAPI", "completed") })
    }


    //get surahList from server
    override fun getSurahListFromAPI() {

    }
}

这是我的存储库

interface Repository {

    fun saveParaData(paraData: List<ParaData>)

    fun getParaFromDB(): LiveData<List<ParaData>>


    fun saveSurahData(surahData: List<SurahData>)

    fun getSurahDataFromDB(): LiveData<List<SurahData>>


    fun getParahListFromAPI()
    fun getSurahListFromAPI()



}

这是我的视图模型

class ParahViewModel :  ViewModel(){}