Android Programming: The Big Nerd Ranch Guide, 4th Edition

Styles

Now, update the buttons in BeatBox with a style. A style is a set of attributes that you can apply to a widget.

Navigate to res/values/styles.xml and add a style named BeatBoxButton (Listing 21.2). (When you created BeatBox, your new project should have come with a built-in styles.xml file. If your project did not, create the file.)

Listing 21.2  Adding a style (res/values/styles.xml)

<resources>

    <style name="AppTheme" parent="Theme.AppCompat.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="BeatBoxButton">
        <item name="android:background">@color/dark_blue</item> ...