I am trying to get a value from the SharedViewModel class but the ViewModelProvider() is giving a parameter error when i am passing requireActivity() although the same initilization and assignment works in my fragments.
It is requiring "ViewModelStoreOwner" to be passed.
class CourseRepository(val app: Application) {
private var viewModel: SharedViewModel = ViewModelProvider(requireActivity()).get(SharedViewModel::class.java)
val courseData = MutableLiveData<List<Course>>()
init {
CoroutineScope(Dispatchers.IO).launch {
callWebService()
}
}
@WorkerThread
suspend fun callWebService() {
if (Utility.networkAvailable(app)) {
val retrofit = Retrofit.Builder().baseUrl(WEB_SERVICE_URL).addConverterFactory(MoshiConverterFactory.create()).build()
val service = retrofit.create(CourseService::class.java)
val serviceData = service.getCourseData(viewModel.pathName).body() ?: emptyList()
courseData.postValue(serviceData)
}
}
}
The purpose of the ViewModel here is because i am storing the Id of the selected RecyclerView item in order to send it to a server
ViewModel instances are scoped to Fragments or Activities (or anything with a similar lifecycle), which is why you need to pass in a
ViewModelStoreOwner
to the provider to get a ViewModel from it. The point of ViewModels is that they will exist until the store they belong to is destroyed.The
requireActivity
method doesn't work here, because you're not inside a Fragment.Some things to consider here: