🤔 Did recomposing on

Configuration

changes stop working recently? That’s what it seems like when I use the code snippet below and specify

android:configChanges="uiMode"

in my manifest.

MaterialTheme(
    colors = if (isSystemInDarkTheme()) darkColors() else lightColors()
) {
    Box(
        Modifier.size(48.dp),
        backgroundColor = MaterialTheme.colors.onBackground
    )
}

The color of the

Box

doesn’t change when I toggle dark mode on my device (pixel 3), but I feel like it did on an older version of compose. The color does get updated correctly if I kill the app and re-open it. I’m seeing this behavior on

alpha01

and

dev17

, using API 29. I also tried similar things by using

ConfigurationAmbient.current

directly, and saw the same behavior. When debugging the app, I was able to see

AndroidComposeView.onConfigurationChanged

get called with the new

Configuration

though.

This should still work, if you have a project that reproduces this could you file a bug?

@Louis Pullen-Freilich [G] filed the bug here: https://issuetracker.google.com/issues/166667488

Pretty strange, I tried using a recent snapshot build, and it seems to work - so I guess something must have fixed this since alpha01 release, not sure what. If you use the snapshot build ( add

maven { url '<https://androidx.dev/snapshots/builds/6798052/artifacts/ui/repository>' }

inside the

allProjects {
    repositories {

block, and then change the version to be:

compose_version = '1.0.0-SNAPSHOT'

) Does this then work correctly for you on your setup?

I just tried using the snapshot build and it worked for me too. Thanks!

Yup looks like it should be fixed in alpha02