1page.title=Creating Backward-Compatible UIs
2page.tags=widgets,support
3
4trainingnavtop=true
5startpage=true
6
7@jd:body
8
9<div id="tb-wrapper">
10<div id="tb">
11
12<h2>Dependencies and prerequisites</h2>
13
14<ul>
15  <li>API level 5</li>
16  <li><a href="{@docRoot}tools/support-library/index.html">The Android Support Package</a></li>
17</ul>
18
19<h2>You should also read</h2>
20
21<ul>
22  <li><a href="{@docRoot}resources/samples/ActionBarCompat/index.html">ActionBarCompat</a></li>
23  <li><a href="http://android-developers.blogspot.com/2010/07/how-to-have-your-cupcake-and-eat-it-too.html">How to have your (Cup)cake and eat it too</a></li>
24</ul>
25
26<h2>Try it out</h2>
27
28<div class="download-box">
29<a href="http://developer.android.com/shareables/training/TabCompat.zip"
30  class="button">Download the sample app</a>
31<p class="filename">TabCompat.zip</p>
32</div>
33
34</div>
35</div>
36
37<p>This class demonstrates how to use UI components and APIs available in newer versions of Android in a backward-compatible way, ensuring that your application still runs on previous versions of the platform.</p>
38
39<p>Throughout this class, the new <a href="{@docRoot}guide/topics/ui/actionbar.html#Tabs">Action Bar Tabs</a> feature introduced in Android 3.0 (API level 11) serves as the guiding example, but you can apply these techniques to other UI components and API features.</p>
40
41<h2 id="lessons">Lessons</h2>
42
43
44<dl>
45  <dt><strong><a href="abstracting.html">Abstracting the New APIs</a></strong></dt>
46    <dd>Determine which features and APIs your application needs. Learn how to define application-specific, intermediary Java interfaces that abstract the implementation of the UI component to your application.</dd>
47
48  <dt><strong><a href="new-implementation.html">Proxying to the New APIs</a></strong></dt>
49    <dd>Learn how to create an implementation of your interface that uses newer APIs.</dd>
50
51  <dt><strong><a href="older-implementation.html">Creating an Implementation with Older APIs</a></strong></dt>
52    <dd>Learn how to create a custom implementation of your interface that uses older APIs.</dd>
53
54  <dt><strong><a href="using-component.html">Using the Version-Aware Component</a></strong></dt>
55    <dd>Learn how to choose an implementation to use at runtime, and begin using the interface in your application.</dd>
56</dl>
57