Firebase Phone Auth UI crash when calling UiModeManager setApplicationNightMode

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Step 1: Are you in the right place?

Yes

Step 2: Describe your environment

Android device: Any
Android OS version: 31 and above
Google Play Services version: Any
Firebase/Play Services SDK version: Any
FirebaseUI version: Any

Step 3: Describe the problem:

We are calling UiModeManager setApplicationNightMode in Application class and the start up Activity launch Firebase Phone Auth intent. According to Android documentation

Changes to night mode take effect locally and will result in a configuration change (and potentially an Activity lifecycle event) being applied to this application.

It could be that by the time when configuration change occur, the launching of Phone Auth UI Activity also happen. In this case what work around can we possibly do?

Steps to reproduce:

Integrate Firebase Phone Auth UI
Add support for day and night theme switching

Observed Results:

Attempting to launch an unregistered ActivityResultLauncher with contract androidx.activity.result.contract.ActivityResultContracts$StartActivityForResult@57b4f96 and input Intent { cmp=com.sample.app/com.firebase.ui.auth.KickoffActivity (has extras) }. You must ensure the ActivityResultLauncher is registered before calling launch().

Note that this only happens on first launch after installing the app

Expected Results:

No crash

Relevant Code:

Inside Application onCreate


val prefModeIsNight = sharedPref.prefBoolean(DARK_THEME)

        // This will be the top level handling of theme
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
            uiModeManager.setApplicationNightMode(
                when (prefModeIsNight) {
                    true -> UiModeManager.MODE_NIGHT_YES
                    else -> UiModeManager.MODE_NIGHT_NO
                }
            )
        }
        else {
            AppCompatDelegate.setDefaultNightMode(
                when (prefModeIsNight) {
                    true -> AppCompatDelegate.MODE_NIGHT_YES
                    else -> AppCompatDelegate.MODE_NIGHT_NO
                }
            )
        }

Launching Activity

private val activityResultLauncher = activityForResult { result, _ ->
        // Handle Intent result
    }

... onCreate

if (user == null)
activityResultLauncher.launch(FirebaseUIPhoneAuthUtil.getAuthIntent(R.style.Theme_App_FirebaseAuthUI))

firebase / FirebaseUI-Android