am 831a0892: am e766fcd5: DOC CHANGE: Bug 3396898 add attribute uses-library

<dl class="xml">

<dl class="xml">

<dt>syntax:</dt>

<dt>syntax:</dt>

<dd><pre>&lt;uses-library android:<a href="#nm">name</a>="<i>string</i>" /&gt;</pre></dd>

<dd>

<pre class="stx">

&lt;uses-library android:<a href="#nm">name</a>="<var>string</var>"

              android:<a href="#rq">required</a>=["true" | "false"] /&gt;

</pre>

</dd>

<dt>contained in:</dt>

<dt>contained in:</dt>

<dd><code><a href="{@docRoot}guide/topics/manifest/application-element.html">&lt;application&gt;</a></code></dd>

<dd>

    <code>

        <a href="{@docRoot}guide/topics/manifest/application-element.html">&lt;application&gt;</a>

    </code>

</dd>

<dt>description:</dt>

<dt>description:</dt>

<dd>Specifies a shared library that the application must be linked against. 

<dd>

    Specifies a shared library that the application must be linked against.

    This element tells the system to include the library's code in the class

    This element tells the system to include the library's code in the class

    loader for the package.

    loader for the package.

    <p>

    <p>

        All of the {@code android} packages (such as {@link android.app},

        All of the {@code android} packages (such as {@link android.app},

        {@link android.content}, {@link android.view}, and {@link android.widget})

        {@link android.content}, {@link android.view}, and {@link android.widget})

        are in the default library that all applications are automatically linked

        are in the default library that all applications are automatically linked

against.  However, some packages (such as {@code maps} and {@code awt} are 

        against.  However, some packages (such as {@code maps}) are

        in separate libraries that are not automatically linked.  Consult the

        in separate libraries that are not automatically linked.  Consult the

        documentation for the packages you're using to determine which library

        documentation for the packages you're using to determine which library

        contains the package code.

        contains the package code.

</p></dd>

    </p>

    <p>

        This element also affects the installation of the application on a particular device and

        the availability of the application in Android Market:

    </p>

    <dl>

        <dt><em>Installation</em></dt>

        <dd>

            If this element is present and its {@code android:required} attribute is set to

            {@code true}, the {@link android.content.pm.PackageManager} framework won't let the user

            install the application unless the library is present on the user's device.

        </dd>

        <dt><em>Market</em></dt>

        <dd>

            Android Market filters applications based on the libraries installed on the

            user's device. For more information about filtering, see the topic

            <a href="{@docRoot}/guide/appendix/market-filters.html">Market Filters</a>.

        </dd>

    </dl>

    <p>

        The {@code android:required} attribute is described in detail in the following section.

    </p>

</dd>

<dt>attributes:</dt>

<dt>attributes:</dt>

<dd><dl class="attr">

<dd>

    <dl class="attr">

        <dt><a name="nm"></a>{@code android:name}</dt>

        <dt><a name="nm"></a>{@code android:name}</dt>

<dd>The name of the library.</dd>

        <dd>

</dl></dd>

            The name of the library. The name is provided by the

            documentation for the package you are using. An example of this is

            &quot;<code>android.test.runner</code>&quot;, a package that contains Android test

            classes.

        </dd>

        <dt><a name="rq"></a>{@code android:required}</dt>

        <dd>

            Boolean value that indicates whether the application requires the

            library specified by {@code android:name}:

            <ul>

                <li>

                    <code>&quot;true&quot;</code>: The application does not function without this

                    library. The system will not allow the application on a device that does not

                    have the library.

                </li>

                <li>

                    <code>&quot;false&quot;</code>: The application can use the

                    library if present, but is designed to function without it if necessary.

                    The system will allow the application to be installed, even if the library is

                    not present. If you use <code>&quot;false&quot;</code>, you are responsible for

                    checking at runtime that the library is available.

                    <p>

                        To check for a library, you can use reflection to determine

                        if a particular class is available.

                    </p>

                </li>

            </ul>

            <p>

                The default is <code>&quot;true&quot;</code>.

            </p>

            <p>Introduced in: API Level 7.</p>

        </dd>

    </dl>

</dd>

<!-- ##api level indication## -->

<!-- ##api level indication## -->

<dt>introduced in:</dt>

<dt>introduced in:</dt>

<dd>API Level 1</dd>

<dd>API Level 1</dd>

<dt>see also:</dt>

<dd>

  <ul>

    <li>{@link android.content.pm.PackageManager}</li>

  </ul>

</dd>

</dl>

</dl>

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