docs: fix expansion library package name

<p>To use APK expansion files with your application and provide the best user experience with

minimal effort on your behalf, we recommend you use the Downloader Library that's included in the

Android Market APK Expansion Library package. This library downloads your expansion files in a

Google Market Apk Expansion package. This library downloads your expansion files in a

background service, shows a user notification with the download status, handles network

connectivity loss, resumes the download when possible, and more.</p>

download two packages from the SDK Manager and add the appropriate libraries to your

application.</p>

<p>First, open the Android SDK Manager, expand <em>Extras</em> and download:</p>

<p>First, open the <a href="{@docRoot}sdk/adding-components.html">Android SDK Manager</a>, expand

<em>Extras</em> and download:</p>

<ul>

  <li><em>Google Market Licensing package</em></li>

  <li><em>Google Market APK Expansion Library package</em></li>

  <li><em>Google Market Apk Expansion package</em></li>

</ul>

<p>If you're using Eclipse, create a project for each library and add it to your app:</p>

from the shared storage is a separate implementation that you should consider based on your

application needs.</p>

<p class="note"><strong>Tip:</strong> The APK Expansion Library package includes a sample

<p class="note"><strong>Tip:</strong> The Apk Expansion package includes a sample

application

that shows how to use the Downloader Library in an app. The sample uses a third library

available in the APK Expansion Library package called the APK Expansion Zip Library. If

available in the Apk Expansion package called the APK Expansion Zip Library. If

you plan on

using ZIP files for your expansion files, we suggest you also add the APK Expansion Zip Library to

your application. For more information, see the section below

versionCode)}</li>

    <li>{@code doesFileExist(Context c, String fileName, long fileSize)}</li>

  </ul>

    <p>For example, the sample app provided in the APK Expansion Library package calls the

    <p>For example, the sample app provided in the Apk Expansion package calls the

following method in the activity's {@link android.app.Activity#onCreate onCreate()} method to check

whether the expansion files already exist on the device:</p>

<pre>

</dl>

<p class="note"><strong>Tip:</strong> For examples of these callbacks that update the download

progress UI, see the {@code SampleDownloaderActivity} in the sample app provided with the

APK Expansion Library package.</p>

Apk Expansion package.</p>

<p>Some public methods for the {@code IDownloaderService} interface you might find useful are:</p>

</div>

</div>

<p>The Android Market APK Expansion Library package includes a library called the APK

<p>The Google Market Apk Expansion package includes a library called the APK

Expansion Zip Library (located in {@code

<sdk>/extras/google/google_market_apk_expansion/zip_file/}). This is an optional library that

helps you read your expansion

provider {@link android.net.Uri} in order to provide file access for certain Android APIs that

expect {@link android.net.Uri} access to media files.

      <p>The sample application available in the

APK Expansion Library package demonstrates a scenario in which this class is useful

Apk Expansion package demonstrates a scenario in which this class is useful

to specify a video with {@link android.widget.VideoView#setVideoURI

VideoView.setVideoURI()}. See the sample app's class {@code SampleZipfileProvider} for an

example of how to extend this class to use in your application.</p></dd>

files. Your application code must perform any necessary patches itself.</p>

<p>If you use ZIP files as your expansion files, the <a href="#ZipLib">APK Expansion Zip

Library</a> that's included with the APK Expansion Library package includes the ability to merge

Library</a> that's included with the Apk Expansion package includes the ability to merge

your

patch file with the main expansion file.</p>

previous version (and so must your application when performing manual updates).</li>

  <li>When adding a patch expansion file, the Android system does not actually patch your

application or main expansion file. You must design your application to support the patch data.

However, the APK Expansion Library package includes a library for using ZIP files

However, the Apk Expansion package includes a library for using ZIP files

as expansion files, which merges the data from the patch file into the main expansion file so

you can easily read all the expansion file data.</li>

</ul>