Android Programming: The Big Nerd Ranch Guide, 2nd Edition

More on XML Layout Attributes

Let’s go back over some of the attributes you added in fragment_crime.xml and answer some lingering questions you might have about widgets and attributes.

Styles, themes, and theme attributes

A style is an XML resource that contains attributes that describe how a widget should look and behave. For example, the following is a style resource that configures a widget with a larger-than-normal text size.

  <style name="BigTextStyle">
    <item name="android:textSize">20sp</item>
    <item name="android:padding">3dp</item>
  </style>

You can create your own styles (and you will in Chapter 20). You add them to a styles file in res/values/ and refer to them in layouts like this: @style/my_own_style.

Take ...