docs: Updated L Preview Overview and support page with information about using NDK r10 for 64-bit support.
Change-Id: Ib759f6a187a8a1298d01f8485a8e05e5d9b67e27
diff --git a/docs/html/preview/api-overview.jd b/docs/html/preview/api-overview.jd
index cf594dc..beea0ca 100644
--- a/docs/html/preview/api-overview.jd
+++ b/docs/html/preview/api-overview.jd
@@ -19,6 +19,7 @@
<li><a href="#BehaviorNotifications">If your app implements notifications...</a></li>
<li><a href="#BehaviorMediaControl">If your app uses RemoteControlClient...</a></li>
<li><a href="#BehaviorGetRecentTasks">If your app uses ActivityManager.getRecentTasks()...</a></li>
+<li><a href="#64BitSupport">If you are using the Android Native Development Kit (NDK)...</a></li>
</ol>
</li>
<li><a href="#UI">User Interface</a>
@@ -246,6 +247,29 @@
its own tasks, use {@code android.app.ActivityManager.getAppTasks()} instead to
retrieve that information.</p>
+<h3 id="64BitSupport">If you are using the Android Native Development Kit (NDK)...</h3>
+
+<p>The L Developer Preview introduces support for 64-bit systems and other
+ preview NDK APIs. The 64-bit enhancement adds needed address space as Android
+ usage diversifies and increases performance while still supporting existing
+ 32-bit apps fully. Use of OpenSSL for cryptography in the platform is also
+ faster. In addition, this release introduces new native audio and media NDK
+ APIs and native OpenGL ES (GLES) 3.1 support.</p>
+
+<p>To use this enhancement, download and install NDK Revision 10 from the
+<a href="{@docRoot}tools/sdk/ndk/index.html">Android NDK page</a>. Refer to the
+Revision 10 <a href="{@docRoot}tools/sdk/ndk/index.html#Revisions">release notes</a>
+for more information about important changes and bug fixes to the NDK.</p>
+
+<p>If you are using the NDK and want to use the features provided in the L
+ Developer Preview, download the {@code android-ndk64-r10} package for your
+ target platform. Due to a
+ <a href="https://code.google.com/p/android/issues/detail?id=73705">known issue</a>,
+ you must still download the 64-bit package even if you only want to compile
+ apps for 32-bit systems. The package also includes
+ the {@code gcc-4.9} compiler for both 32- and 64-bit apps. The L Developer
+ Preview API library is located under the {@code platforms/android-L/} API directory.</p>
+
<h2 id="UI">User Interface</h2>
<h3 id="MaterialDesign">Material design support</h3>