android-viewmodel

I want to implement/refactor an app to the Android Architecture Components concept, see https://developer.android.com/jetpack/docs/guide In this topic Android Architecture Components ViewModel - communication with Service/IntentService , I found a very good answer to the architectural issue, see https://stackoverflow.com/a/46736146/6251815 But i want to ask, how to bind the service from a repository, because we have neither context nor activity here. To be clear on that, the question is about how to merge both concepts. What is my situation? I need to have a boundService (see https://developer

Looking at the Google docs for ViewModel , they show the below sample code on how to get a ViewModel : val model = ViewModelProviders.of(this).get(MyViewModel::class.java) When using the latest dependency android.arch.lifecycle:extensions:1.1.1 there is no such class ViewModelProviders . Going to the documentation for ViewModelProviders , I saw a comment saying: This class was deprecated in API level 1.1.0. Use ViewModelProvider.AndroidViewModelFactory The problem is, when trying to use ViewModelProvider.AndroidViewModelFactory , cannot find an equivalent of method to get the instance of the

Scenario I have a quizz generator, which generates a sequence of quizzes of different classes. The sequence is of unlimited length. There is a view model for the quizz generator. There is a view model for each type of a quizz. The quizz generator view model should create the view models of the quizzes depending on their classes. Issue A view model must not hold a reference to the lifecycle, but I need the lifecycle to create view models. ViewModelProviders.of(lifecycle).get(classForQuizzType); Questions Where do I create the sub view models of the quizzes? The one solution I can think of is to

I found a case when architecture components ViewModel isn't retained - in short it goes as follows: Activity is started and ViewModel instance is created Activity is put to background Device screen is rotated Activity is put back to foreground ViewModel's onCleared method is called and new object is created Is it normal behavior of Android that my ViewModel instance is getting destroyed in this case? If so, is there any recommended solution of keeping its state? One way I can think of is saving it once onCleared is called, however, it would also persist the state whenever activity is actually

I have a service which provides UI that is visible to user most of the time. I was experimenting with new Application Architecture when I came with a problem. MyModelviewModel viewModel = ViewModelProviders.of(this).get(MyModelviewModel.class); But as you know this can be only AppCompat or Fragment Is there some alternative? or can I put observer directly on my LiveData like Im puting on ViewModel viewModel.getList().observe(Playground.this, new Observer<List<TestEntity>>() { @Override public void onChanged(@Nullable List<TestEntity> items) { recyclerViewAdapter.addItems(items); } }); LiveData