1page.title=<uses-library> 2parent.title=The AndroidManifest.xml File 3parent.link=manifest-intro.html 4@jd:body 5 6<div class="sidebox-wrapper"> 7<div class="sidebox"> 8 <img src="{@docRoot}assets/images/icon_play.png" style="float:left;margin:0;padding:0;"> 9 <p style="color:#669999;padding-top:1em;">Google Play Filtering</p> 10 <p style="padding-top:1em;">Google Play uses the <uses-library> elements declared 11 in your app manifest to filter your app from devices that do not meet it's library 12 requirements. For more information about filtering, see the topic 13 <a href="{@docRoot}google/play/filters.html">Google Play filters</a>.</p> 14 </div> 15</div> 16 17<dl class="xml"> 18 19<dt>syntax:</dt> 20<dd> 21<pre class="stx"> 22<uses-library 23 android:<a href="#nm">name</a>="<var>string</var>" 24 android:<a href="#rq">required</a>=["true" | "false"] /> 25</pre> 26</dd> 27<dt>contained in:</dt> 28<dd> 29 <code> 30 <a href="{@docRoot}guide/topics/manifest/application-element.html"><application></a> 31 </code> 32</dd> 33<dt>description:</dt> 34<dd itemprop="descridption"> 35 Specifies a shared library that the application must be linked against. 36 This element tells the system to include the library's code in the class 37 loader for the package. 38 <p> 39 All of the {@code android} packages (such as {@link android.app}, 40 {@link android.content}, {@link android.view}, and {@link android.widget}) 41 are in the default library that all applications are automatically linked 42 against. However, some packages (such as {@code maps}) are 43 in separate libraries that are not automatically linked. Consult the 44 documentation for the packages you're using to determine which library 45 contains the package code. 46 </p> 47 <p> 48 This element also affects the installation of the application on a particular device and 49 the availability of the application on Google Play: 50 </p> 51 <dl> 52 <dt><em>Installation</em></dt> 53 <dd> 54 If this element is present and its {@code android:required} attribute is set to 55 {@code true}, the {@link android.content.pm.PackageManager} framework won't let the user 56 install the application unless the library is present on the user's device. 57 </dd> 58 </dl> 59 <p> 60 The {@code android:required} attribute is described in detail in the following section. 61 </p> 62</dd> 63<dt>attributes:</dt> 64<dd> 65 <dl class="attr"> 66 <dt><a name="nm"></a>{@code android:name}</dt> 67 <dd> 68 The name of the library. The name is provided by the 69 documentation for the package you are using. An example of this is 70 "<code>android.test.runner</code>", a package that contains Android test 71 classes. 72 </dd> 73 <dt><a name="rq"></a>{@code android:required}</dt> 74 <dd> 75 Boolean value that indicates whether the application requires the 76 library specified by {@code android:name}: 77 <ul> 78 <li> 79 <code>"true"</code>: The application does not function without this 80 library. The system will not allow the application on a device that does not 81 have the library. 82 </li> 83 <li> 84 <code>"false"</code>: The application can use the 85 library if present, but is designed to function without it if necessary. 86 The system will allow the application to be installed, even if the library is 87 not present. If you use <code>"false"</code>, you are responsible for 88 checking at runtime that the library is available. 89 <p> 90 To check for a library, you can use reflection to determine 91 if a particular class is available. 92 </p> 93 </li> 94 </ul> 95 <p> 96 The default is <code>"true"</code>. 97 </p> 98 <p>Introduced in: API Level 7.</p> 99 </dd> 100 </dl> 101</dd> 102<!-- ##api level indication## --> 103<dt>introduced in:</dt> 104<dd>API Level 1</dd> 105 106<dt>see also:</dt> 107<dd> 108 <ul> 109 <li>{@link android.content.pm.PackageManager}</li> 110 </ul> 111</dd> 112</dl>
