Why doesn't isAppearanceLightStatusBars affect on Status bar content color programmatically?-CodePudding

I've tried to change the color of status bar content using isAppearanceLightStatusBars:

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_splash_screen)
        WindowCompat.setDecorFitsSystemWindows(window, false)

        val controller = ViewCompat.getWindowInsetsController(window.decorView)
        controller?.isAppearanceLightStatusBars = true
}

it doesn't change anything, but when i change it in theme xml file, it works normal:

<style name="Theme.NutShop" parent="Theme.MaterialComponents.NoActionBar">
        <item name="android:windowLightStatusBar" tools:targetApi="23">true</item>
</style>

I need to know the reason of this problem, and solution, thanks.

CodePudding user response：

First you have add the below items to your base theme. Also note that your base theme name is added to your manifests application tag.

<item name="android:statusBarColor" tools:ignore="NewApi">@color/black</item>

<item name="android:windowLightStatusBar" tools:ignore="NewApi">false</item>

android:statusBarColor -> represents the color of your status bar

android:windowLightStatusBar -> represents the color of the icons and text on your status bar.

True means that your status bar color is a light color so make the text and icons dark in color.
False means that yyour status bar color is a dark color so make the text and icons light in color.

CodePudding user response：

I've found the problem, ViewCompat.getWindowInsetsController(window.decorView) is returning null, so i changed it with WindowCompat.getWindowInsetsController(window, window.decorView) then it worked now, but still don't know why the first one is returning null.