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14       <li><a href="#SplitActionBar">Using split action bar</a></li>
62 optimized user experience on both handsets and tablets, using fragments and the action bar.</p>
92   <li><strong>Use the action bar</strong>, but follow best practices and ensure your design 
93 is flexible enough for the system to adjust the action bar layout based on the screen size.
96 title bar at the top of the screen. By default, the action bar includes the application logo on the
100 <p>You can enable items from the options menu to appear directly in the action bar as "action
101 items". You can also add navigation features to the action bar, such as tabs or a drop-down list,
106 <p>This guide provides some tips for using the action bar in ways that support both tablets and
107 handsets. For a detailed discussion of the action bar APIs, read the <a
128 <p class="note"><strong>Note:</strong> Aside from one feature in the action bar, all the
132 bar below.</p>
156 <p>The support library <em>does not</em> provide APIs for the action bar, but you can use
159 create an action bar that supports all devices.</p>
194 update the action bar each time the fragments change, depending on what actions or navigation modes
206 modular, simplify action bar management, and let the system handle all the back stack work on
364 component for Android apps on both tablets and handsets. To ensure that the action bar
367 android.app.ActionBar} APIs to design your action bar, the Android system does all
368 the work to gracefully adapt the action bar for different screen sizes. Here are some important
369 tips to follow when creating your action bar:</p>
376 bar. However, you might need {@code "always"} when an action view does not provide a default
380 action item. Forcing too many action items into the action bar can create a cluttered UI and
381 action items may overlap with other action bar elements such as the title or navigation items.</li>
383   <li>When adding action items to the action bar with a text title, also <strong>provide an
399 other action items (such as a handset in portrait orientation), the tabs appear below the action bar
400 (this is known as the "stacked action bar"). If you must build a custom navigation mode or other
401 custom views in the action bar, thoroughly test them on smaller screens and make any
402 necessary adjustments to support a narrow action bar.</li>
405 <p>For example, the mock-ups below demonstrate how the system may adapt an action bar based
408 and the tabs appear in a separate row (the stacked action bar). On the tablet, more action items can
409 fit in the action bar and so do the tabs.</p>
413 action bar components based on the available screen space.</p>
416 <h3 id="SplitActionBar">Using split action bar</h3>
419 higher, there's an extra mode available for the action bar called "split action bar." When
420 you enable split action bar, a separate bar appears at the bottom of the screen to
422 handset). Splitting the action bar ensures that a reasonable amount of space is available to
426 <p>To enable split action bar, simply add {@code uiOptions="splitActionBarWhenNarrow"} to your
433 <p class="img-caption"><strong>Figure 3.</strong> Split action bar with navigation tabs on the left;
437 <p>If you'd like to hide the main action bar at the top, because you're using the built-in
438 navigation tabs along with the split action bar, call {@link
440 application icon in the action bar. In this case, there's now nothing left in the main action bar,
459 developer guide, you can use the application icon in the action bar to facilitate user navigation