docs: add note about declaring file sizes with sample app's code
Change-Id: I7858956916c0db5a585228a890a20fb004155b8c
diff --git a/docs/html/guide/market/expansion-files.jd b/docs/html/guide/market/expansion-files.jd
index 5aaf9f1..cd9b57a 100644
--- a/docs/html/guide/market/expansion-files.jd
+++ b/docs/html/guide/market/expansion-files.jd
@@ -700,7 +700,8 @@
}
</pre>
<p>In this case, each {@code XAPKFile} object holds the version number and file size of a known
-expansion file and a boolean as to whether it's the main expansion file.</p>
+expansion file and a boolean as to whether it's the main expansion file. (See the sample
+application's {@code SampleDownloaderActivity} class for details.)</p>
<p>If this method returns false, then the application must begin the download.</p>
</li>
<li>Start the download by calling the static method {@code
@@ -870,8 +871,8 @@
current speed, overall progress, and total so you can update the download progress UI.</dd>
</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 Expansion
-Downloader package.</p>
+progress UI, see the {@code SampleDownloaderActivity} in the sample app provided with the
+APK Expansion Library package.</p>
<p>Some public methods for the {@code IDownloaderService} interface you might find useful are:</p>
@@ -1125,6 +1126,11 @@
InputStream fileStream = expansionFile.getInputStream(pathToFileInsideZip);
</pre>
+<p>For more information about using this library for your expansion files, look at
+the sample application's {@code SampleDownloaderActivity} class, which includes additional code to
+verify the downloaded files using CRC. Beware that if you use this sample as the basis for
+your own implementation, it requires that you <strong>declare the byte size of your expansion
+files</strong> in the {@code xAPKS} array.</p>
