Questions tagged [android-architecture-lifecycle]
68 questions
3
votes
1 answer
Implementing a sidebar nav using android architecture components
With the new architecture components of android you can't use the default auto generated class navigation drawer class provided by android... why? because it extends from AppCompatActivity to provide the use of support.v7 lib for widgets like…
ECommerce
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3
votes
1 answer
What is the difference between ViewModel and AndroidViewModel
For anyone having this question,
As per Android Documentation,
Since the ViewModel outlives specific activity and fragment instantiations, it should never reference a View, or any class that may hold a reference to the activity context. If the…
Rahul
- 4,699
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2
votes
1 answer
How to inject dependencies in a SavedStateHandle-aware AndroidViewModel?
Assume a view model like this:
public class FooViewModel extends AndroidViewModel {
@Inject public FooViewModel(Application app, SavedStateHandle handle, Bar bar) {
// ...
}
}
I want to inject Bar using Dagger 2. I am developing on…
Eureton
- 162
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2
votes
1 answer
what does the ::MainViewModel mean when pass to the singleArgViewModelFactory
in kotlin coroutines lab smaple, https://codelabs.developers.google.com/codelabs/kotlin-coroutines/#6
it creates the viewModel by passing the MainViewModel.FACTORY(repository)
val viewModel = ViewModelProviders
.of(this,…
lannyf
- 9,865
- 12
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- 152
2
votes
1 answer
Cannot trust current state of AAC lifecycle
Issue summary
getLifecycle().getCurrentState() gave me wrong state.
Environment (integrated library, OS, etc)
compileSdkVersion : 27
targetSdkVersion : 27
support library : 27.1.1
Expected behavior
onCreate() -> CREATED
onStart() ->…
galcyurio
- 1,776
- 15
- 25
2
votes
1 answer
Room Livedata.observeforever not working after activity resumes
I have tested some test cases using the simple Room test code as below.
"dao.getAll().observeForever()" does not work after main activity resumes.
new words are inserted correctly but only observation does not work.
If I use dao.getAll().observe(),…
nansjlee
- 417
- 2
- 8
2
votes
0 answers
Android Architecture Component - Prevent @OnLifecycleEvent when launching camera Intent
I implemented 2 LifecycleEvents Lifecycle.Event.ON_PAUSE and Lifecycle.Event.ON_START now these get triggered whenever I launch the camera Intent (which is logical in some way). Is there any way to prevent this?
Ferdau
- 1,524
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2
votes
1 answer
How do I create a ViewModel for each page in a ViewPager?
I have a ViewPager, where I show multiple instances of PetFragment. To create a new instance of a PetFragment, I call PetFragment.newInstance(petId).
I want a separate ViewModel instance for each petId. But ViewModelProvider.Factory#create() only…
ZakTaccardi
- 12,212
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2
votes
1 answer
Should my mvvm, livedata app cancel network requests when app is backgrounded?
Using Google's mvvm architecture components Github browser sample as a reference, how would one cancel a viewmodel hosted, live data observed, retrofit network request? :)
Maybe I'm reading it wrong, but if network conditions are poor and requests…
Daniel Wilson
- 18,838
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2
votes
2 answers
Failed to resolve: android.arch.persistence.room:runtime: 1.0.0-alpha1
I am unable to compile the following gradle :-
compile 'android.arch.persistence.room:runtime: 1.0.0-alpha1'
Error Message :-
Error:(26, 13) Failed to resolve: android.arch.persistence.room:runtime: 1.0.0-alpha1
Show in File Show in Project…
swaroop srinivasan
- 23
- 1
- 5
2
votes
1 answer
Strange LiveData behavior vs ObservableField
I have a problem with LiveData from new Android Architecture Components. I have used ObservableField before but wanted to try ACC.
When I set up value by MutableLiveData.setValue 4 times in one method in Activity I get only one call onChange, when I…
MDikkii
- 273
- 1
- 10
2
votes
1 answer
Dagger : Why does dagger require a @inject constructor for an object that does't depend on another object
I think I'm missing something. I get this error:
PostsVM cannot be provided without an @Inject constructor or from an
@Provides-annotated method.
Assume classes as follows :
@Module
public class AppModule {
private final Application…
Relm
- 7,923
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1
vote
1 answer
How do I use MVVM with bound service?
I have a bound service that is started as foreground service for handling exoplayer.
Here is how my fragment handles the service -
@AndroidEntryPoint
class AudioPlayerFragment: Fragment() {
private var binding: AudioPlayerFragmentBinding by…
krtkush
- 1,378
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1
vote
0 answers
how to initialise ViewModel in createFragment of FragmentStateAdapter?
I have a ExerciseDetailFragment that contains an ExerciseFragmentStatePagerAdapter to show a bunch of SupportUsFragmentCard. These cards can be swiped horizontally by the user.
In my ExerciseFragmentStatePagerAdapter I have the following code:
fun…
HixField
- 3,538
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- 54
1
vote
1 answer
LiveData value is null after setting in viewModelScope
I have a viewmodel for a fragment with a search functionality. I made use of Coroutines to fetch from the API and then set the MediatorLiveData value with the result, although the list of objects are reflected on my RecyclerView. When I try to…
Ralph
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- 25