|  | <p>This is a demo application highlighting how to use the KeyChain APIs introduced in API Level 14.</p> | 
|  |  | 
|  | <p>The source code for this demo app shows how to install a PKCS12 key chain stored in the assets folder, | 
|  | grant permission to the app to use the installed key chain and finally display the certificate and | 
|  | private key info.  The app also has a simple implementation of a web server listening to requests | 
|  | at an SSL socket using the same certificate in the key chain. | 
|  | </p> | 
|  |  | 
|  | <p>The application includes the following key classes:</p> | 
|  | <ul> | 
|  | <li><a href="src/com/example/android/keychain/KeyChainDemoActivity.html"><code>KeyChainDemoActivity</code></a> | 
|  | — the main <code>Activity</code> that is used to install the key chain and start/stop | 
|  | the web server.  </li> | 
|  | <li><a href="src/com/example/android/keychain/SecureWebServer.html"><code>SecureWebServer</code></a> | 
|  | — a single thread web server listening at port 8080 for <code>https://localhost:8080</code> request</li> | 
|  | <li><a href="src/com/example/android/keychain/SecureWebServerService.html"><code>SecureWebServerService</code></a> | 
|  | — a <code>Service</code> that runs the web server in the foreground.</li> | 
|  | </ul> | 
|  |  | 
|  | <p>If you are developing an application that uses the KeyChain APIs, | 
|  | remember that the feature is supported only on Android 4.0 (API level 14) and | 
|  | higher versions of the platform. To ensure that your application can only be | 
|  | installed on devices that are running Android 4.0, remember to add the | 
|  | following to the application's manifest:</p> | 
|  | <ul> | 
|  | <li><code><uses-sdk android:minSdkVersion="14" /></code>, which | 
|  | indicates to the Android platform that your application requires | 
|  | Android 4.0 or higher. For more information, see <a | 
|  | href="../../../guide/appendix/api-levels.html">API Levels</a> and the | 
|  | documentation for the <a | 
|  | href="../../../guide/topics/manifest/uses-sdk-element.html"><code><uses-sdk></code></a> | 
|  | element.</li> | 
|  | </ul> | 
|  |  | 
|  | <p>Note: Due to browser cache, you need to restart the browser completely before it can recognize | 
|  | any keystore updates.  The easiest way to do this is to dismiss the app in the Recent Apps list. | 
|  | </p> | 
|  |  | 
|  | <p> | 
|  | For more information about using the KeyChain API, see the | 
|  | <a href="../../../reference/android/security/KeyChain.html"> | 
|  | <code>android.security.KeyChain</code></a> | 
|  | documentation. | 
|  | </p> | 
|  |  | 
|  | <img alt="" src="../images/KeyChainDemo1.png" /> | 
|  | <img alt="" src="../images/KeyChainDemo2.png" /> | 
|  | <img alt="" src="../images/KeyChainDemo3.png" /> | 
|  | <img alt="" src="../images/KeyChainDemo4.png" /> | 
|  |  |