Stack Overflow
Stack Overflow

Questions tagged [mutablelivedata]

LiveData which publicly exposes setValue(T) and postValue(T) method.

320 questions
5
votes
0 answers

Not able to import InstantTaskExecutorRule in my 'jUnit' test case even after adding 'core-testing' dependency - Android testing

I am writing test cases for my LoginViewModel. Where I want to perform setValue() operation on my MutableLiveData. To avoid Method getMainLooper in android.os.Looper not mocked Exception I am trying to add the following Rule in my ViewModel file…
Kavita Patil
  • 1,784
  • 1
  • 17
  • 30
5
votes
5 answers

How to stop LiveData event being triggered more than Once

I am using MutableLiveData within my application for event based communication. I have single activity two fragments architecture. With the help of ViewModel, I'm consuming the LiveData events in Fragment-1. But, when I replace this Fragment-1 with…
Ningan
  • 151
  • 1
  • 8
5
votes
3 answers

MVVM - MutableLiveData of Custom Model not been updating into ViewModel with databinding and always is null

Summary: When I try to send to the repository a custom Model, the MutableLiveData is null. I think it is because of the observer of the MutableLiveData. Please, read to the end. ViewModel class LoginViewModel @Inject constructor( private val…
Faustino Gagneten
  • 2,564
  • 2
  • 28
  • 54
4
votes
1 answer

LiveData transformations map functionality

Recently i've been learning transformations methods on LiveData I know that we can use map or switchMap method to transform livedata. Let's say we have Player data class similar below data class Player(val name: String, val score: Int = 0) And we…
nasibeyyubov
  • 1,735
  • 3
  • 11
  • 28
4
votes
2 answers

Android Unit Test: How to mock an object which contains MutableLiveData but only exposes LiveData?

I have a repository class that uses a MutableLiveData object, exposed as just LiveData, to return results of async web queries to a ViewModel. The ViewModel then uses Transformation to map the results to another MutableLiveData which is observed by…
ThePMO
  • 413
  • 4
  • 13
4
votes
1 answer

Using liveData{} coroutine builder on Dispatchers.IO thread

My code fun weatherByCity(cityName: String): LiveData> = liveData(Dispatchers.IO) { val response = appRepository.weatherByCity(cityName) emit(response) } fun weatherByZipCode(zipCode: String): LiveData>…
Sharad
  • 589
  • 5
  • 19
4
votes
1 answer

Replace getLoaderManager().initLoader with MutableLivedata

getLoaderManager has been deprecated with android 28. ViewModel, Repository and Room replace the loader functionality I have found 2…
Theo
  • 2,012
  • 1
  • 16
  • 29
4
votes
1 answer

Android: Setting LiveData as MutableLiveData

Firstly i might not actually be understanding what mutable live data is correctly. i get data from room using live data and then show it to the UI, it is a question with answers, so at the end of the question i would like to update the database with…
Dave
  • 313
  • 1
  • 3
  • 16
4
votes
3 answers

Why does LiveData better than MutableLiveData?

In many samples i see that: class DataViewModel{ val data:LivaData get() = _data private val _data = MutableLiveData() } But more simply looks like this: class DataViewModel{ val data =…
Serg Burlaka
  • 2,351
  • 24
  • 35
4
votes
1 answer

Using an ArrayAdapter with LiveData.

I'm familiar with MVVM in WPF, but am in the process of porting an existing Android app to make use of a ViewModel class and LiveData for the first time. The app "as/was" has a custom ArrayAdapter that is used to correctly display the items…
JoeHz
  • 2,136
  • 1
  • 18
  • 29
4
votes
1 answer

How to observe changes in database in order to update LiveData

I am migrating an app from a LoaderManager with Callbacks to an implementation using ViewModel and LiveData. I would like to keep using the existing SQLiteDatabase. The main implementation works OK. The Activity instantiates the ViewModel and…
Paul Naveda
  • 724
  • 8
  • 16
4
votes
1 answer

android : mutablelivedata change is not updating the UI

I am using MutableLiveData to store a choice user has made. The value is set from another activity. SO onResume i am calling myMutableLivedata.value = newvale But this does not update the UI unless i call a invalidateall(). Is this expected…
png
  • 4,368
  • 7
  • 69
  • 118
4
votes
1 answer

Observing LiveData from Room causes PagedListAdapter to refresh, ViewModel refreshes data also on orientation changes

I'm building an app that uses ArticleBoundaryCallback to init a call to an API, and store the response in Room. I'm also listening to that table using LiveData, and displaying the items in a PagedListAdapter. The problem is that every time new data…
jorjSB
  • 610
  • 4
  • 12
3
votes
1 answer

LiveData value not updating UI in Jetpack Compose until I navigate out

I am calling an increaseCount(id: String) method from a composable to increase the value of a parameter in a LiveData List of objects. The value gets updated quite alright but the UI only shows the update once I navigate out. PS: I am using a…
MrBE
  • 103
  • 2
  • 10
3
votes
1 answer

Mutable live-data give multiple response give old response from api and after give new response

**Mutable live-data give multiple response old response from api and after give new response ** mutable live-data give multiple response here is my code Repository suspend fun forgotPassword(email:String,sig: String,salt:…
androi useru
  • 81
  • 10
1
2
3
…
21 22