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androidtextviewandroid-theme

Android - Setting the background of TextView programmatically according to Dark and Light Mode Themes

I have an app with themes (Dark and Light Mode Theme). And want to set background of TextView programmatically.

But the problem is, when I change the color, and change the app theme to Dark Mode then the color has not been changed. It should changed according to Theme Settings.

txtTitle.setBackgroundColor(resources.getColor(R.color.black))

Not working, just black background shows

Solution

  • your backgroundColor does not change because you always set it to R.color.black despite the current theme. To be theme-sensitive you must create a color resource which is defined for light and dark mode.

    Inside your res folder you must create a values folder for night mode values-night.

    In both you define a color resource which is set to the TextView.

    Light mode

    <resources>
   <color name="text_background">@android:color/black</color>
</resources>

    Dark mode

    <resources>
   <color name="text_background">@android:color/white</color>
</resources>

    In code

    txtTitle.setBackgroundColor(resources.getColor(R.color.text_background))