Code example for ActionBarActivity

 * This demonstrates the basics of the Action Bar and how it interoperates with the 
 * standard options menu. This demo is for informative purposes only; see ActionBarUsage for 
 * an example of using the Action Bar in a more idiomatic manner. 
public class ActionBarMechanics extends ActionBarActivity { 
    protected void onCreate(Bundle savedInstanceState) {
        // The Action Bar is a window feature. The feature must be requested 
        // before setting a content view. Normally this is set automatically 
        // by your Activity's theme in your manifest. The provided system 
        // theme Theme.WithActionBar enables this for you. Use it as you would 
        // use Theme.NoTitleBar. You can add an Action Bar to your own themes 
        // by adding the element <item name="android:windowActionBar">true</item> 
        // to your style definition. 
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