samples/ApiDemos/_index.html

<p>The API Demos application includes a variety of small applications 
that illustrate the use of various Android APIs. It includes samples of:
</p>
<ul>
  <li>Notifications</li>  
  <li>Alarms</li>  
  <li>Progress Dialogs</li>  
  <li>Intents</li>  
  <li>Menus</li>  
  <li>Search</li>  
  <li>Persistent application state</li>  
  <li>Preferences</li>  
  <li>Background Services</li>  
  <li>App Widgets</li>  
  <li>Voice Recognition</li>  
  <li>And many many more...</li>  
</ul>

<p>You'll notice that all the samples are included in a single Android project,
so the application code and other resource files for all samples are batched together. 
To help you find the code that's relevant to you, here's a directory that
points to the program code for the different topics included in the project:</p>

<ul>
    <li><a href="src/com/example/android/apis/animation/index.html">Animation</a></li>

    <li><a href="src/com/example/android/apis/app/index.html">App</a></li>

    <li><a href="src/com/example/android/apis/appwidget/index.html">App Widgets</a></li>

    <li><a href="src/com/example/android/apis/content/index.html">Content</a></li>
    
    <li><a href="src/com/example/android/apis/graphics/index.html">Graphics</a></li>
    
    <li><a href="src/com/example/android/apis/media/index.html">Media</a></li>
    
    <li><a href="src/com/example/android/apis/os/index.html">OS</a></li>

    <li><a href="src/com/example/android/apis/text/index.html">Text</a></li>
    
    <li><a href="src/com/example/android/apis/view/index.html">Views</a></li>
</ul>