udpate gcore setup doc with info for android studio

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<h2>In this document</h2>

<ol>

  <li><a href="#Install">Install the Google Play Services SDK</a></li>

  <li><a href="#Setup">Set Up a Project that Uses Google Play Services</a></li>

  <li><a href="#Proguard">Create a Proguard Exception</a></li>

  <li><a href="#ensure">Ensure Devices Have the Google Play services APK</a></li>

</ol>

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</div>

<p>To develop an app using the <a href="{@docRoot}reference/gms-packages.html">Google

Play services APIs</a>, you must download the Google Play services SDK

from the <a href="{@docRoot}tools/help/sdk-manager.html">SDK Manager</a>.

<p>To test your app when using the Google Play services SDK, you must use either:</p>

<ul>

  <li>A compatible Android

    device that runs Android 2.2 or higher and includes Google Play Store.</li>

    device that runs Android 2.3 or higher and includes Google Play Store.</li>

  <li>The Android emulator with an <a href="{@docRoot}tools/devices/index.html">AVD</a>

  that runs the Google APIs platform based on Android 4.2.2 or higher.</li>

</ul>

<p>To install the Google Play services SDK for development:</p>

<ol>

  <li>Launch the SDK Manager.

  <li>Launch the SDK Manager in one of the following ways:

   <ul>

    <li>From Eclipse (with <a href="{@docRoot}tools/help/adt.html">ADT</a>),

    <li>In Android Studio, click <strong>SDK Manager</strong>

<img src="{@docRoot}images/tools/sdk-manager-studio.png" style="vertical-align:bottom;margin:0;height:19px" />

in the toolbar.</li>

    <li>In Eclipse (with <a href="{@docRoot}tools/help/adt.html">ADT</a>),

    select <strong>Window</strong> &gt; <strong>Android SDK Manager</strong>.</li>

    <li>On Windows, double-click the <code>SDK Manager.exe</code> file at the root of the Android

  SDK directory.</li>

  </li>

  <li>Install the Google Play services SDK.

    <p>Scroll to the bottom of the package list, expand <b>Extras</b>, select

    <b>Google Play services</b>, and install it.</p>

    <b>Google Play services</b>, and install it. If you're using Android Studio, also install

    <b>Google Repository</b> (it provides the Maven repository used for Gradle builds).</p>

      <p>The Google Play services SDK is saved in your Android SDK environment at

      <code>&lt;android-sdk&gt;/extras/google/google_play_services/</code>.</p>

<p class="note"><strong>Note:</strong> Google Play services 4.0.30 (released

November 2013) and newer versions require Android 2.3 or higher. If your app supports Android 2.2,

you can continue development with the Google Play services SDK, but must instead install

<b>Google Play services for Froyo</b> from the SDK Manager.</p>

  </li>

  <li>Install a compatible version of the Google APIs platform.

    <p>If you want to test your app on the emulator, expand the directory for <b>Android 4.2.2

    (API 17)</b> or a higher version, select <b>Google APIs</b>, and install it. Then create a

    new <a href="{@docRoot}tools/devices/index.html">AVD</a> with Google APIs as

    the platform target.</p>

    <p class="note"><strong>Note:</strong> Only Android 4.2.2 and higher versions of the

    Google APIs platform include Google Play services.</p>

  </li>

  <li>Make a copy of the Google Play services library project.

    <p class="note"><strong>Note:</strong> If you are using Android Studio, skip this step.</p>

    <p>Copy the library project at

  <code>&lt;android-sdk&gt;/extras/google/google_play_services/libproject/google-play-services_lib/</code>        

  to the location where you maintain your Android app projects.

<h2 id="Setup">Set Up a Project with the Library</h2>

<h2 id="Setup">Set Up a Project that Uses Google Play Services</h2>

<p>To set up a project to use the Google Play services SDK:</p>

<p><b>Using Android Studio:</b></p>

<ol>

  <li>Reference the library project in your Android project.

      <p>See the 

      <a href="{@docRoot}tools/projects/projects-eclipse.html#ReferencingLibraryProject">Referencing a Library Project for Eclipse</a>

      or <a href="{@docRoot}tools/projects/projects-cmdline.html#ReferencingLibraryProject">Referencing a Library Project on the Command Line</a>

      for more information on how to do this.</p>

  <li>Open the <code>build.gradle</code> file inside your application directory.</li>

  <li>Add a new build rule under <code>dependencies</code> for the latest version of

<code>play-services</code>. For example:

<pre class="no-pretty-print">

apply plugin: 'android'

...

dependencies {

    compile 'com.android.support:appcompat-v7:+'

    <strong>compile 'com.google.android.gms:play-services:4.0.30'</strong>

}

</pre>

<p>Be sure you update this version number each time Google Play services is updated.</p>

  </li>

  <li>Save the changes and click <strong>Sync Project with Gradle Files</strong>

<img src="{@docRoot}images/tools/sync-project.png" style="vertical-align:bottom;margin:0;height:19px" />

in the toolbar.

  </li>

</ol>

<p>You can now begin developing features with the

<a href="{@docRoot}reference/gms-packages.html">Google Play services APIs</a>.</p>

<p><b>Using Eclipse or another IDE:</b></p>

<p>To make the Google Play services APIs available to your app, you must reference the library

project you created in step 4 of the <a href="#Install">installation instructions</a>.</p>

<p>See the <a href="{@docRoot}tools/projects/projects-eclipse.html#ReferencingLibraryProject"

>Referencing a Library Project for Eclipse</a> or <a

href="{@docRoot}tools/projects/projects-cmdline.html#ReferencingLibraryProject">Referencing a

Library Project on the Command Line</a> for more information on how to do this.</p>

<p class="note"><strong>Note:</strong>

You should be referencing a copy of the library that you copied to your development

workspace&mdash;you should not reference the library directly from the Android SDK directory.</p>

  </li>

  <li>If you are using <a href="{@docRoot}tools/help/proguard.html">ProGuard</a>, add the following

      lines in the <code>&lt;project_directory&gt;/proguard-project.txt</code> file

      to prevent ProGuard from stripping away required classes:

<p>Once you've set up your project to reference the library project,

you can begin developing features with the

<a href="{@docRoot}reference/gms-packages.html">Google Play services APIs</a>.</p>

<h2 id="Proguard">Create a Proguard Exception</h2>

<p>To prevent <a href="{@docRoot}tools/help/proguard.html">ProGuard</a> from stripping away

required classes, add the following lines in the

<code>&lt;project_directory&gt;/proguard-project.txt</code> file:

<pre>

-keep class * extends java.util.ListResourceBundle {

    protected Object[][] getContents();

    public static final ** CREATOR;

}

</pre>

<p class="note"><strong>Note:</strong> When using Android Studio, you must add Proguard

to your <code>gradle.build</code> file's build types. For more information, see the

<a href="http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Running-ProGuard"

>Gradle Plugin User Guide</a>.

</ol>

<p>Once you have the Google Play services library project added to your app project,

you can begin developing features with the

<a href="{@docRoot}reference/gms-packages.html">Google Play services APIs</a>.</p>

  <p>To enable ProGuard so that it runs as part of an Ant or Eclipse build, set the

  <code>proguard.config</code> property in the <code>&lt;project_root&gt;/project.properties</code>

  file. The path can be an absolute path or a path relative to the project's root.</p>

<p class="note"><strong>Note:</strong> When using Android Studio, you must add Proguard

to your <code>gradle.build</code> file's build types. For more information, see the

<a href="http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Running-ProGuard"

>Gradle Plugin User Guide</a>.

<p>If you left the <code>proguard.cfg</code> file in its default location (the project's root directory),

you can specify its location like this:</p>

<pre class="no-pretty-print">