Android Programming: The Big Nerd Ranch Guide, 2nd 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. (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 20.2  Adding a style (res/values/styles.xml)

<resources>

  <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
  </style>

  <style name="BeatBoxButton">
      <item name="android:background">@color/dark_blue</item>
  </style>

</resources>

Here, you create a style called BeatBoxButton. This style defines a single attribute, android:background, and sets it to a dark blue color. You can apply ...