Black screen shown whenever I save app language with AppCompatDelegate.setApplicationLocales [266331459]

Assigned

Bug

Status Update

No update yet.

Description

ra...@gmail.com

created issue #1

Jan 23, 2023 01:14PM

Component used: androidx.appcompat:appcompat
Version used: 1.6.0
Devices/Android versions reproduced on: Samsung Galaxy S8+ with Android 9; Samsung Galaxy Tab S7 FE with Android 13

We have an in-app language picker and we would like to switch to the new API for saving the user selected language.
Unfortunately whenever calling AppCompatDelegate.setApplicationLocales(appLocale), a black screen is shown before the activity is updated.
This also happens with the sample found here

https://github.com/android/user-interface-samples/tree/main/PerAppLanguages.
As I understood from my research this happens because the Activity is being recreated, but seeing a black screen for a few seconds when user changes the locale does not seem like a good user experience to me.
Is there something we could do to avoid this "black screen" when saving the language with AppCompatDelegate.setApplicationLocales(appLocale) method? Setting android:windowBackground property for the activity theme does not have any effect.
Thank you for your help!

Comments

hi...@gmail.com <hi...@gmail.com> #2Mar 11, 2024 08:08AM

Forgot to note the environment.
This crash occurs on only API 21.

eg...@gmail.com <eg...@gmail.com> #3Mar 19, 2024 02:24PM

This crash occurs on API 22 and 23 when the user doesn't have Google Play installed. Related discussions:

https://stackoverflow.com/q/41025200/842697

Message last modified on Mar 26, 2024 08:08AM

sa...@gmail.com <sa...@gmail.com> #4Mar 27, 2024 09:17AM

This crash doesn't reproduce on 1.1.0-rc0. Found that this commit in 1.1.0 with applyOverrideConfiguration

https://android.googlesource.com/platform/frameworks/support/+/26079d87c79a64829f036236353fac1dae4e0613%5E%21/#F2 causes crashes.

Message last modified on Mar 27, 2024 09:48AM

pa...@gmail.com <pa...@gmail.com> #5Apr 17, 2024 10:11AM

For me this still persisted in 1.1.0-rc01 as well as 1.1.0-alpha01.

Only downgrading all my androidx version to the previously working state helped.

From:

implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.cardview:cardview:1.0.0'
implementation 'com.google.android.material:material:1.1.0-alpha10'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.recyclerview:recyclerview:1.1.0-beta04'
implementation 'androidx.viewpager2:viewpager2:1.0.0-beta04'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'androidx.vectordrawable:vectordrawable:1.1.0'
implementation 'androidx.preference:preference:1.1.0'
implementation 'androidx.core:core:1.2.0-alpha04'

back to:

implementation 'androidx.appcompat:appcompat:1.1.0-rc01'
implementation 'androidx.cardview:cardview:1.0.0'
implementation 'com.google.android.material:material:1.1.0-alpha09'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.recyclerview:recyclerview:1.1.0-beta03'
implementation 'androidx.viewpager2:viewpager2:1.0.0-beta03'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'androidx.vectordrawable:vectordrawable:1.1.0-rc01'
implementation 'androidx.preference:preference:1.1.0-rc01'
implementation 'androidx.core:core:1.2.0-alpha03'

pa...@gmail.com <pa...@gmail.com> #6Apr 17, 2024 11:29AM

If you want to use 1.1.0 , override applyOverrideConfiguration in your activity as follows. However, this might need app restart for API 21 to 25, while switching Dark Theme to Light Theme and vice versa.

override fun applyOverrideConfiguration(overrideConfiguration: Configuration?) {
if (Build.VERSION.SDK_INT in 21..25 && (resources.configuration.uiMode == AppConstants.appContext.resources.configuration.uiMode)) {
return
}
super.applyOverrideConfiguration(overrideConfiguration)
}

ep...@gmail.com <ep...@gmail.com> #7May 15, 2024 07:16AM

Any update? Issue reproduces with androidx.appcompat:appcompat:1.1.0...

Issue 266331459