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-page.title=Versioning Your Applications
-@jd:body
-
-<div id="qv-wrapper">
-<div id="qv">
-
-<h2>Versioning quickview</h2>
-
-<ul>
-<li>Your application <em>must</em> be versioned</a></li>
-<li>You set the version in the application's manifest file</li>
-<li>How you version your applications affects how users upgrade </li>
-<li>Determine your versioning strategy early in the development process, including considerations for future releases.</li>
-</ul>
-
-<h2>In this document</h2>
-
-<ol>
-<li><a href="#appversion">Setting Application Version</a></li>
-<li><a href="#minsdkversion">Specifying Minimum System API Version</a>
-</ol>
-
-
-<h2>See also</h2>
-
-<ol>
-<li><a href="{@docRoot}guide/publishing/preparing.html">Preparing to Publish Your Application</a></li>
-<li><a href="{@docRoot}guide/publishing/publishing.html#market">Publishing On Android Market</a></li>
-<li><a href="{@docRoot}guide/topics/manifest/manifest-intro.html">The AndroidManifest.xml File</a></li>
-</ol>
-
-</div>
-</div>
-
-<p>Versioning is a critical component of your application upgrade/maintenance
-strategy. </p>
-
-<ul>
-<li>Users need to have specific information about the application version that
-is installed on their devices and the upgrade versions available for
-installation. </li>
-<li>Other applications &mdash; including other applications that you publish as
-a suite &mdash; need to query the system for your application's version, to
-determine compatibility and identify dependencies.</li>
-<li>Services through which you will publish your application(s) may also need to
-query your application for its version, so that they can display the version to
-users. A publishing service may also need to check the application version to
-determine compatibility and establish upgrade/downgrade relationships.</li>
-</ul>
-
-<p>The Android system itself <em>does not ever</em> check the application version
-information for an application, such as to enforce restrictions on upgrades,
-compatibility, and so on. Instead, only users or applications themselves are
-responsible for enforcing any version restrictions for applications themselves. </p>
-
-<p>The Android system <em>does</em> check any system version compatibility expressed
-by an application in its manifest, in the <code>minSdkVersion</code> attribute. This
-allows an application to specify the minimum system API with which is compatible.
-For more information see <a href="#minsdkversion">Specifying Minimum System API Version</a>.
-
-<h2 id="appversioning">Setting Application Version</h2>
-<p>To define the version information for your application, you set attributes in
-the application's manifest file. Two attributes are available, and you should
-always define values for both of them: </p>
-
-<ul>
-<li><code>android:versionCode</code> &mdash; An integer value that represents
-the version of the application code, relative to other versions.
-
-<p>The value is an integer so that other applications can programatically
-evaluate it, for example to check an upgrade or downgrade relationship. You can
-set the value to any integer you want, however you should make sure that each
-successive release of your application uses a greater value. The system does not
-enforce this behavior, but increasing the value with successive releases is
-normative. </p>
-
-<p>Typically, you would release the first version of your application with
-versionCode set to 1, then monotonically increase the value with each release,
-regardless whether the release constitutes a major or minor release. This means
-that the <code>android:versionCode</code> value does not necessarily have a
-strong resemblence to the application release version that is visible to the
-user (see <code>android:versionName</code>, below). Applications and publishing
-services should not display this version value to users.</p>
-</li>
-<li><code>android:versionName</code> &mdash; A string value that represents the
-release version of the application code, as it should be shown to users.
-<p>The value is a string so that you can describe the application version as a
-&lt;major&gt;.&lt;minor&gt;.&lt;point&gt; string, or as any other type of
-absolute or relative version identifier. </p>
-
-<p>As with <code>android:versionCode</code>, the system does not use this value
-for any internal purpose, other than to enable applications to display it to
-users. Publishing services may also extract the <code>android:versionName</code>
-value for display to users.</p>
-</li>
-</ul>
-
-<p>You define both of these version attributes in the
-<code>&lt;manifest&gt;</code> element of the manifest file. </p>
-
-<p>Here's an example manifest that shows the <code>android:versionCode</code>
-and <code>android:versionName</code> attributes in the
-<code>&lt;manifest&gt;</code> element. </p>
-
-<pre>
-&lt;?xml version="1.0" encoding="utf-8"?&gt;
-&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
- package="com.example.package.name"
- android:versionCode="2"
- android:versionName="1.1"&gt;
- &lt;application android:icon="@drawable/icon" android:label="@string/app_name"&gt;
- ...
- &lt;/application&gt;
-&lt;/manifest&gt;
-</pre>
-
-<p>In this example, note that <code>android:versionCode</code> value indicates
-that the current .apk contains the second release of the application code, which
-corresponds to a minor follow-on release, as shown by the
-<code>android:codeName</code> string. </p>
-
-<p>The Android framework provides an API to let applications query the system
-for version information about your application. To obtain version information,
-applications use the
-{@link android.content.pm.PackageManager#getPackageInfo(java.lang.String, int)}
-method of {@link android.content.pm.PackageManager PackageManager}. </p>
-
-<h2 id="minsdkversion">Specifying Minimum System API Version</h2>
-
-<p>If your application requires a specific minimum version of the Android
-platform, you can specify that version as an API Level identifier
-in the application's manifest file. Doing so ensures that your
-application can only be installed on devices that
-are running a compatible version of the Android system. </p>
-
-<p>To specify the minimum system version in the manifest, use this attribute: </p>
-
-<ul>
-<li><code>android:minSdkVersion</code> &mdash; An integer value corresponding to
-the code version of the Android platform.
-<p>When preparing to install an application, the system checks the value of this
-attribute and compares it to the system version. If the
-<code>android:minSdkVersion</code> value is greater than the system version, the
-system aborts the installation of the application. </p>
-
-<p>If you do not specify this attribute in your manifest, the system assumes
-that your application is compatible with all platform versions.</p></li>
-</ul>
-
-<p>To specify a minimum platform version for your application, add a
-<code>&lt;uses-sdk&gt;</code> element as a child of
-<code>&lt;manifest&gt;</code>, then define the
-<code>android:minSdkVersion</code> as an attribute. </p>
-
-<p>For more information, also see the <a href="{@docRoot}sdk/android-1.1.html">Android System Image 1.1 Version Notes</a>.</p>