Android 12 Splash Screen beta not modifiable

Question

I am trying to create splash screen and set it as a Splash theme its not picking up the background color and even the branded icon and showing default screen with android rounded logo with grey background.

theme.xml

<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Theme.BaseMVVM" parent="Theme.MaterialComponents.DayNight.NoActionBar">
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/purple_500</item>
        <item name="colorPrimaryVariant">@color/purple_700</item>
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/teal_200</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
      
    </style>

</resources>

Splash.xml

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:tools="http://schemas.android.com/tools">
    <style name="Theme.BaseMVVM.Initial" parent="Theme.SplashScreen">
        <item name="android:windowSplashScreenBackground" tools:targetApi="s">@color/teal_200</item>
        <item name="android:windowSplashScreenAnimatedIcon" tools:targetApi="s">@drawable/ic_baseline_article_24</item>
        <item name="android:windowSplashScreenBrandingImage" tools:targetApi="s">@drawable/ic_baseline_article_24</item>
        <item name="postSplashScreenTheme">@style/Theme.BaseMVVM</item>
    </style>
</resources>

Menifest:

 <activity
            android:theme="@style/Theme.BaseMVVM.Initial"
            android:name=".SplashActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

SplashActivity:

class SplashActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        val splashScreen = installSplashScreen()
        super.onCreate(savedInstanceState)
        splashScreen.setKeepOnScreenCondition { true }
        lifecycleScope.launchWhenCreated {
            delay(2000)
            gotoHomeActivity()
        }

    }

Answer 1

I was able to reproduce the problem by by adding the android namespace in the the Splash.xml items which makes it target android 12 and above only.

   <item name="android:windowSplashScreenBackground" tools:targetApi="s">@color/teal_200</item>
    <item name="android:windowSplashScreenAnimatedIcon" tools:targetApi="s">@drawable/ic_baseline_article_24</item>
    <item name="android:windowSplashScreenBrandingImage" tools:targetApi="s">@drawable/ic_baseline_article_24</item>

When the android attribute is used the splash screen wont be available to lower levels of android. To use the Compatibility API,omit the android attribute for the items and use it like this:

   <item name="windowSplashScreenBackground" >@color/teal_200</item>
    <item name="windowSplashScreenAnimatedIcon" >@drawable/ic_baseline_article_24</item>
    <item name="windowSplashScreenBrandingImage" >@drawable/ic_baseline_article_24</item>

The Android Documentation has a guide too