styles.xml

<resources>
    <style name="SplashTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="android:windowFullscreen">true</item>
        <item name="android:background">@drawable/splash_screen_light</item>
    </style>

    <style name="AppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="android:textColor">#000000</item>
        <item name="colorAccent">#1e9f21</item>
    </style>
    
      <style name="LightTheme" parent="AppTheme">
        <item name="textColor">#000000</item>
        <item name="colorAccent">#1e9f21</item>
        <item name="backgroundColor">#ffffff</item>
    </style>

    <style name="DarkTheme" parent="AppTheme">
        <item name="textColor">#ffffff</item>
        <item name="colorAccent">#1e9f21</item>
        <item name="backgroundColor">#000000</item>
    </style>
</resources>