AppCompatActivity, Theme.AppCompat, and Slider Not Compatible

Hello,

Please use Theme.MaterialComponents.Light.NoActionBar to your app default theme, then create a custom theme that extend the Theme.AppCompat.Light.NoActionBar in your styles.xml like following code.

   <style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">  
           <!-- Customize your theme here. -->  
           <item name="colorPrimary">@color/colorPrimary</item>  
           <item name="colorPrimaryDark">@color/colorPrimaryDark</item>  
           <item name="colorAccent">@color/colorAccent</item>  
       </style>  
     
     
     
      <style name="MyCustomTheme" parent="Theme.AppCompat.Light.NoActionBar">  
   <!-- Customize your theme here. -->  
           <item name="colorPrimary">#ff0000</item>  
           <item name="colorPrimaryDark">#ff0000</item>  
           <item name="colorAccent">#ff0000</item>  
             
       </style>  

If I have a button that need to set the MyCustomTheme, I can use following theme.

   <Button  
            android:layout_column="0" android:layout_row="4"  
           android:layout_width="match_parent"  
           android:layout_height="wrap_content"  
           android:theme="@style/MyCustomTheme"  
           android:text="click"/>  

You can refer to this document about android Material themes

Best Regards,

Leon Lu

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