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Questions tagged [android-savedstate]

For questions related to Android's onSaveInstanceState and onRestoreInstanceState methods.

197 questions
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SavedStateHandleController.attachToLifecycle : Already attached to lifecycleOwner

I am using AbstractSavedStateViewModelFactory to use SavedStateHandle in a View Model with non-empty constructor. But I get an Illegal State Exception saying it is already attached to a life-cycle owner(see below). When I use…
ashwin mahajan
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Cases when savedInstanceState is NOT null

If I do not explicitly call onSaveInstanceState(), which are possibilities, when savedInstanceState is not null in onCreate? I see one option, when system recreates my app after crash - then savedInstanceState is not null. Which are other options?
Goltsev Eugene
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Saving RecyclerView Scroll position

I have an activity with a ViewPager and 3 fragments called A,B,C. A has a recyclerView populated by cardView and each card implements and OnClickListener which leads to a new Activity D. I want to be able to save the recyclerView scroll position…
Davide Valiante
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2 answers

Unable to resume activity after taking a picture with camera

i'm trying to make an activity where i can upload an image into an imageView by using camera or gallery. On my tablet it works fine but on my galaxy s4 i can't restore activity after taking the picture with the camera. Here's the…
Gianluca Ceccoli
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Android - Navigation Up from Activity to Fragment

I'm developing some application and I have one problem. I have : 1. Activity A (Navigation Drawer pattern) with ListFragment in FrameLayout: xml: …
pharrell
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2 answers

Put HashMap> in savedInstanceState

I have a problem with adding values in savedInstanceState in Android. I tried to find solution on the internet, but I cannot seem to find a solution. Maybe some of you might know where the problem is. I need to put HashMap> to savedInstanceState,…
marko kurt
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SavedStateHandle does not persist data

I followed the instructions in the following page and created a viewModel, but SavedStateHandle does not work when I close the app and open it again. Here is the page: Saved State module for ViewModel Here is my view model class: class…
a.toraby
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Android:SaveState, Fragments and ViewModel: what am I doing wrong?

I have the single activity with several fragments on top, as Google recommends. In one fragment I wish to place a switch, and I wish to still know it's state when I come back from other fragments. Example: I am in fragment one, then I turn on the…
Kevin Herrera
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1 answer

Saved Game + Real Time Multiplayer Android

I want to build a game that has realTimeMultiplayer and support for saved game. Both functionalities come from the Play Services API provided by android. The players would invite their friends, play in real-Time, then whenever one player quits, the…
ProgrammedChem
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MVP in Android app - Presenter state

I work with map in Android. So, I want to save state of some of my presenters to save data, when I leaved activity(not when rotate the screen). I can't find the solution besides singleton with ArrayList, but I would like to use already written…
Роберт Иванов
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Android doesn't automatically save view states

Basically, I have a TextView and two EditText views in one activity. From that activity, a different activity is started. If I press the hardware back button on the device (ending the second activity), the views' states are the same as before, which…
Elliot Alderson
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Difference between Saved Instance State and Static variables

I'm creating an app that downloads some stuff when it starts and show a list to the user, but i don't want it re-downloading the list every time the app opens, or whenever the user changes to a different activity and comes back. To solve this, i'm…
George
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What happens to the code when someone closes or kills an app?

I have been looking into storing data for my app and trying to choose between different methods (onSaveInstanceState, onPause/onResume) and different methods of storing(states in onSaveInstanceState, SQLite, Prefences). I am curious what happens to…
John Targaryen
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Can Instance State be Persisted Across an App Update?

Is it possible for an Android app's savedInstanceState to be persisted across an app update? Take the following situation for example: I have a Parcelable model that gets written in onSaveInstanceState App updates, the structure of that…
Tspoon
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What is difference between SavedStateHandle and rememberSaveable?

As far as I know, with Android Compose, SavedStateHandle is used with ViewModel and follows the ViewModel lifecycle and key-value map and it can be used as flow. rememberSaveable is used with variables in Composable and follows the Composable…
Goodham
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