android-viewmodel

I have a separate class in which I handle data fetching (specifically Firebase) and I usually return LiveData objects from it and update them asynchronously. Now I want to have the returned data stored in a ViewModel, but the problem is that in order to get said value, I need to observe the LiveData object returned from my data fetching class. The observe method required a LifecycleOwner object as the first parameter, but I obviously don't have that inside of my ViewModel and I know I am not supposed to keep a reference to the Activity/Fragment inside of the ViewModel. What should I do? In

I implemented LiveData & ViewModel to mimic AsyncTaskLoader. I load file names from the camera directory in DCIM, and then i attach a fileObserver to Observe when a File (picture) is deleted, and then a callback tells the LiveData to re-fetch the fileNames when delete event occurs The Problem: The code below should fetch the file Names from DCIM/Pictures asynchronously with the help of LiveData and then a FileObserver is attached to the directory (DCIM/Pictures), to monitor when a file is deleted and a callback is implemented with the LiveData sub-class to reload the files, as demonstrated in

Iʼm fairly new to developing Android apps and Iʼm trying to do everything “the right way.” So right now, Iʼm implementing the new Android Paging Library into my project, where I need to load a list of articles from a network server. I have an ArticlesRepository class that returns an ArticleList class containing instances of ArticleListItem that I would like to display in a RecyclerView. The list of articles is paginated already on the server, so the repository sends a request for the first page and returns an ArticleList with the page property set to 1 and the articles property containing a

I have a Retrofit Service like this public interface BrandsService { @GET("listBrand") Call<List<Brand>> getBrands(); } Then I have a Repository to get data from an api like this public class BrandsRepository { public static final String TAG = "BrandsRepository"; MutableLiveData<List<Brand>> mutableLiveData; Retrofit retrofit; @Inject public BrandsRepository(Retrofit retrofit) { this.retrofit = retrofit; } public LiveData<List<Brand>> getListOfBrands() { // Retrofit retrofit = ApiManager.getAdapter(); final BrandsService brandsService = retrofit.create(BrandsService.class); Log.d(TAG,

I'm exploring Google's Android Architecture Components . In my project I'm relying on Services and IntentServices . What is the correct way to communicate with app's ViewModel from an IntentService or Service? Is it achievable using LiveData? TL;DR It's achievable - use an observer relationship. Your IntentService and likely location service should not be aware of your ViewModel. Consider using a Repository. LiveData can be used (see postValue ). It's good for updating the UI (ViewModel to Activity communication) because it's lifecycle-aware. When you're not updating the UI, you could consider