fullpage=true
page.title=Develop
header.hide=1
carousel=1
tabbedList=1
@jd:body
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      Take the Android Developer Survey</a>
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<style>
#noplayer-message {
position:absolute;top:50%;left:0;width:100%;z-index:-1;text-align:center;display:none;
}
#player-frame object {z-index:1;}
</style>

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      <!-- busted flash player message -->
      Your video is supposed to appear here.<br/>
      Make sure you have the <a href="http://get.adobe.com/flashplayer/" target="_blank">Flash&reg; Player</a>.
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<div class="wrap">
   <!-- Slideshow -->
   <div class="slideshow-container slideshow-develop col-16">
       <a href="" class="slideshow-prev">Prev</a>
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           <ul>

              <li class="item carousel-home">
                 <div class="col-8">
                   <img src="{@docRoot}images/google/gps-location.png"
class="play no-shadow no-transform" style="margin:0 0 0 70px;height:230px;width:340px" />
                 </div>
                <div class="content-right col-6" style="width:350px">
                  <h2>New Location APIs from Google</h2>
                  <p>The latest version of Google Play services includes new APIs that provide more
                  efficient and immediate user location data on devices running Android 2.2
                  and higher. Features include geofencing APIs, user activity recognition, and
                  power-efficient location updates.</p>
                  <p><a
href="{@docRoot}google/play-services/location.html" class="button">Read more</a></p>
                </div>
              </li>

              <li class="item carousel-home">
                 <div class="col-8">
                   <img src="{@docRoot}images/google/gps-plus-signin-hero.jpg"
class="play no-shadow no-transform" style="margin:0 0 0 40px;max-height:250px;height:250px;
                                           max-width:409px;width:409px" />
                 </div>
                <div class="content-right col-6" style="width:350px">
                  <h2>New Cross-Platform Single Sign On</h2>
                  <p>Google+ Sign-In is an easy, trusted way to sign a user into your app.
                  Now it's even more seamless. A user can sign in to your app on one device and
                  pick it up on another&mdash;without signing in again. Best of all, it's built
                  into Google+ Sign-in, so there's no change needed in your app.</p>
                  <p><a
href="{@docRoot}google/play-services/plus.html" class="button">Read more</a></p>
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              </li>

              <li class="item carousel-home">
                 <div class="col-8">
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class="play no-shadow no-transform" style="margin:0 0 0 40px;max-height:250px;height:250px;
                                           max-width:409px;width:409px" />
                 </div>
                <div class="content-right col-6" style="width:350px">
                  <h2>New Google Maps Android APIs!</h2>
                  <p>Google Maps Android API version 2 is now available with enhanced
                    features such as 3D buildings, vector-based map tiles, rich overlay capabilities,
                    indoor maps, support for fragments, and much more.</p>
                    
                  <p>The APIs are bundled with Google Play services and are
                  compatible with Android 2.2 and higher.</p>
                  <p><a
href="{@docRoot}google/play-services/maps.html" class="button">Read more</a></p>
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src="//lh4.ggpht.com/-lfjzgG5Dqrk/UHMThRtpRwI/AAAAAAAABpk/h4d3nsmkgPM/s400/mint.png"
class="play no-shadow no-transform" />
                 </div>
                <div class="content-right col-6">
                  <h2>Building Great Apps for Tablets</h2>
                  <p>Tablets are a growing part of the Android installed base and they offer new opportunities for user engagement and monetization. If you are targeting tablets, check out the <strong>Tablet App Quality Checklist</strong> for tips and techniques on how to deliver a great app experience for tablet users.  </p>
                  <p><a
href="/distribute/googleplay/quality/tablet.html" class="button">Read
more</a></p>
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                     <img
src="//lh4.ggpht.com/-6K1kfNOdek8/T72bXvtTSQI/AAAAAAAABmw/kYzmJt0_328/s1600/google-play-subscriptions.png" class="play"></div>
                   <div class="content-right col-6">
                   <h2>In-app Subscriptions with Trials</h2>
                   <p>You can now set up a <strong>free trial period</strong> for any Google Play in-app subscription, making it easy for users try your subscriber content before automatically converting to a full subscription. Free trials give you a new way to bring users into your products and engage them effectively. </p>
                   <p><a class="button"
href="{@docRoot}google/play/billing/v2/billing_subscriptions.html#trials">Read
more</a></p>
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                </li>
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   </div>
   <!-- /End slideshow -->
</div>
<div class="wrap">
	<!-- news and feature feed -->
	<div class="feed col-8" style="margin-left:0">
		<ul class="feed-nav">
			<li class="active">DEVELOPER NEWS</li>
			<li>FEATURED DOCS</li>
		</ul>
		<div class="feed-container">
			<div class="feed-frame">
                                <!-- DEVELOPER NEWS -->
          <ul>
            <li><a href="//android-developers.blogspot.com/2013/05/new-ways-to-optimize-your-business-in.html">
              <div class="feed-image" style="background:url('//4.bp.blogspot.com/-VmHMT66JjxU/UZZdfPUaJsI/AAAAAAAACQc/kDx5-Ep5YRo/s1600/framed_designed-tablets.png') no-repeat 0 0;background-size:180px"></div>
              <h4>New Ways to Optimize Your Business in Google Play</h4>
              <p>Many of you have invested in making great tablet experiences for your users, and we want to ensure that that work pays off...</p>
              </a></li>
            <li><a href="//android-developers.blogspot.com/2013/05/android-studio-ide-built-for-android.html">
              <div class="feed-image" style="background:url('//1.bp.blogspot.com/-u5dfSsMOMC0/UZO_5DC_W9I/AAAAAAAACM8/YCMn15HPzpE/s320/Studio_table.png') no-repeat 0 0;background-size:180px"></div>
              <h4>Android Studio: An IDE built for Android</h4>
              <p>To develop Android Studio, we cooperated with JetBrains, creators of one of the most advanced Java IDEs available today...</p>
              </a></li>
            <li><a href="//android-developers.blogspot.com/2013/01/verifying-back-end-calls-from-android.html">
              <div class="feed-image" style="background:url('//lh4.ggpht.com/7z4NItEg-X21zvFGAarKonk-VaysBYthJ30u1JjaQ0-5fjyHNawnmoNeG--4FCACog=w124') no-repeat 0 0"></div>
              <h4>Verifying Back-End Calls from Android Apps</h4>
              <p>You can take advantage of the auth APIs in Google Play services to let your back end know which app is calling and for which user....</p>
              </a></li>
            <li><a href="//android-developers.blogspot.com/2012/12/daydream-interactive-screen-savers.html">
              <div class="feed-image" style="background:url('//lh4.ggpht.com/-wVsUOo4xGE0/UNy9mZ1nmMI/AAAAAAAAB4w/f6rhyLn5KbI/s1600/daydream-example.jpg') no-repeat 0 0;background-position:right top;"></div>
              <h4>Daydream: Interactive Screen Savers</h4>
              <p>Daydream is an interactive screen-saver mode introduced in Android 4.2. Learn how to add Daydreams to your apps...</p>
              </a></li>
          </ul>
                                <!-- FEATURED DOCS -->
          <ul>
            <li><a href="{@docRoot}distribute/googleplay/spotlight/tablets.html">
              <h4>Tablet Stories</h4>
              <p>More developers are investing in a full tablet experience for their apps. Here are some stories from developers who are seeing real results as they expand their offering to include Android tablets. </p>
              </a></li>
            <li><a href="{@docRoot}distribute/googleplay/quality/core.html">
              <h4>Core App Quality Guidelines</h4>
              <p>This document helps you assess basic aspects of quality in your app through a compact set of core app quality criteria and associated tests. All Android apps should meet these criteria.</p>
              </a></li>
            <li><a href="{@docRoot}guide/topics/ui/notifiers/notifications.html">
              <h4>Updated Notifications API Guide</h4>
              <p>The Notifications API Guide is updated to include information about building Jelly Bean rich notifications using the Support Library APIs for backwards-compatibility.</p>
              </a></li>
            <li><a href="{@docRoot}guide/topics/ui/dialogs.html">
              <h4>Updated Dialogs API Guide</h4>
              <p>The Dialogs API Guide now shows to use DialogFragment class, a simpler way to manage your dialogs and embed them in alternative layouts.</p>
              </a></li>                                      
          </ul>
			</div>
		</div>
	</div>	<!-- /news and feature feed -->
	<!-- video feed -->
	<div class="feed col-8" style="margin-right:0">
		<ul class="feed-nav">
			<li class="active">DEVELOPERS LIVE</li>
			<li>VIDEO PLAYLISTS</li>
		</ul>
		<div class="feed-container">
			<div class="feed-frame">
              <ul id="DevelopersLive">
              </ul>
              <ul id="VideoPlaylists">
              </ul>
			</div>
		</div>
	</div>
	<!-- /video feed -->
</div>

<br class="clearfix"/>

      
      
      
      
      
      
      
      

<script src="//swfobject.googlecode.com/svn/trunk/swfobject/swfobject.js" type="text/javascript"></script>
<script type="text/javascript">

/* Load a video into the player box.
 * @param id        The YouTube video ID
 * @param title     The video title to display in the player box (character escaped)
 * @param autoplay  Whether to automatically play the video
 */
function loadVideo(id, title, autoplay) {
  swfobject.embedSWF('//www.youtube.com/v/' + id + '&rel=1&border=0&fs=1&autoplay=' +
      (autoplay?1:0), 'player', '525', '330', '9.0.0', false, false, {allowfullscreen: 'true'});
  $("#videoPlayerTitle").html("<h2>" + unescape(title) + "</h2>");
  $("#player-wrapper").show();
  setTimeout(function(){$('#noplayer-message').show()}, 2000);
}

/* Draw all videos from a playlist into a 'videoPreviews' list
 * @param data  The feed data returned from the youtube request
 */
function renderVideoPlaylists(data) {
  var MAX_LIST_DESC_LENGTH = 130; // the length at which we will trim the description
  var MAX_VIDEO_DESC_LENGTH = 100; // the length at which we will trim the description
  var MAX_LIST_LENGTH = 4; // number of videos to put in the list
  var feed = data.feed;
  var entries = feed.entry || [];
  var playlistId = feed.yt$playlistId.$t;

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  var $liPlaylist = $('<li class="playlist"></li>');
  var $aPlaylist = $('<a href="" onclick="togglePlaylist(this);return false;"></a>');
  $liPlaylist.append($aPlaylist);
  $aPlaylist.append('<h4>' + feed.title.$t + '</h4>');
  
  var playlistDescription = summary.substr(0, MAX_LIST_DESC_LENGTH);
  playlistDescription += playlistDescription.length == MAX_LIST_DESC_LENGTH ? "..." : ""; // add ellipsis if we've chopped the description
  $aPlaylist.append('<p>' +  playlistDescription + '</p>');
  
  // Loop through each entry (each video) and add it to the 'videoPreviews' list
  var length = feed.entry.length < MAX_LIST_LENGTH ? feed.entry.length : MAX_LIST_LENGTH; // max of 4 videos per list
  for (var i = 0; i < length; i++) {
    var entry = entries[i];

    var title = entry.title.$t;
    var id = entry.media$group.yt$videoid.$t;
    var thumbUrl = entry.media$group.media$thumbnail[0].url;
    var fullDescription = entry.media$group.media$description.$t;
    var playerUrl = entry.media$group.media$content[0].url;

    var shortDescription = fullDescription.substr(0, MAX_VIDEO_DESC_LENGTH);
    shortDescription += shortDescription.length == MAX_VIDEO_DESC_LENGTH ? "..." : ""; // add ellipsis if we've chopped the description

    var img = $('<img src="' + thumbUrl + '" width="60" height="45"/>');
    var a = $('<a href="#" onclick="loadVideo(\'' + id + '\',\'' + escape(title) + '\',true); return false;" />');
    var pShortDescription = $('<p>' + shortDescription + '</p>');
    var h5Title = "<h5>" + title + "</h5>";
    var li = $('<li class="playlist-video"/>');

    li.append(a);
    a.append(img).append(h5Title).append(pShortDescription);

    $ulVideos.append(li);
    
    // use the first entry's thumbnail for the playlist
    if (i == 0) {
      $aPlaylist.prepend('<img src="' + thumbUrl + '" width="120" height="90"/>');
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  }
  
  if (feed.entry.length > MAX_LIST_LENGTH) {
    // add item to go to youtube for playlist
    $ulVideos.append('<li class="more"><a href="//www.youtube.com/playlist?list=' + playlistId + '">More &raquo;</a></li>');
  }

  $liPlaylist.append($ulVideos);
  $('#VideoPlaylists').append($liPlaylist);
}


function renderDevelopersLivePlaylist(data) {

  var MAX_DESC_LENGTH = 125; // the length at which we will trim the description
  var feed = data.feed;
  var entries = feed.entry || [];
  var playlistId = feed.yt$playlistId.$t;

  var ul = $('#DevelopersLive');

  // Loop through each entry (each video) and add it to the '#DevelopersLive' list
  for (var i = 0; i < 4; i++) {
    var entry = entries[i];

    var title = entry.title.$t;
    var id = entry.media$group.yt$videoid.$t;
    var thumbUrl = entry.media$group.media$thumbnail[0].url;
    var fullDescription = entry.media$group.media$description.$t;
    var playerUrl = entry.media$group.media$content[0].url;
    var shortDescription = fullDescription.substr(0, MAX_DESC_LENGTH);
    shortDescription += shortDescription.length == MAX_DESC_LENGTH ? "..." : ""; // add ellipsis if we've chopped the description

    var img = $('<img src="' + thumbUrl + '" width="120" height="90"/>');
    var a = $('<a href="#" onclick="loadVideo(\'' + id + '\',\'' + escape(title) + '\',true); return false;" />');
    var pShortDescription = $('<p>' + shortDescription + '</p>');
    var h4Title = "<h4>" + title + "</h4>";
    var li = $('<li/>');

    li.append(a);
    a.append(img).append(h4Title).append(pShortDescription);

    ul.append(li);
  }
}

/* This 'playlist' object defines the playlist IDs for each tab.
 * Each name inside 'playlist' corresponds to class names for the tab that the playlists belong to (eg: "googleioTab" and "googleioBox" divs).
 * Each string in 'ids' is the ID of a YouTube playlist that belongs in the corresponding tab.
 */
var playlists = {
  'designinaction' : {
    'ids': ["PLWz5rJ2EKKc8j2B95zGMb8muZvrIy-wcF"]
  },
  'bizdevbytes' : {
    'ids': ["PLWz5rJ2EKKc8-Osr0TuHyTMEhKV0xJ6ql"]
  },
  'thisweek' : {
    'ids': ["PLWz5rJ2EKKc9Wam5jE-9oY8l6RpeAx-XM"]
  },
  'googleio' : {
    'ids': ["PLWz5rJ2EKKc9WGUwq2gQ-coU3fSyexgOx"]
  }
};

/* Request the playlist feeds from YouTube */
function showVideosPlaylists() {
  for (var x in playlists) {
    var ids = playlists[x].ids;
    for (var i in ids) {
      var script = "<script type='text/javascript' src='//gdata.youtube.com/feeds/api/playlists/"
                    + ids[i] +
                    "?v=2&alt=json-in-script&max-results=50&callback=renderVideoPlaylists&orderby=position'><\/script>";
      $("body").append(script);
    }
  }
}


/* Request the playlist feeds from YouTube */
function showDevelopersLivePlaylist() {
  var playlistId = "PLWz5rJ2EKKc_XOgcRukSoKKjewFJZrKV0"; /* DevBytes */
  var script = "<script type='text/javascript' src='//gdata.youtube.com/feeds/api/playlists/"
                + playlistId +
                "?v=2&alt=json-in-script&max-results=10&callback=renderDevelopersLivePlaylist&orderby=position'><\/script > ";
  $("body").append(script);
}


function togglePlaylist(listLink) {
  var $list = $(listLink).parent();
  var $ul = $list.find('ul');
  if ($ul.is(":visible")) {
    $ul.slideUp(function() {
      $list.css({'height':'inherit'});
    });
  } else {
    $list.closest('ul').find('li.playlist').find('ul').slideUp();
    $ul.slideDown();
    $list.css({'height':'auto'});
  }
}

showDevelopersLivePlaylist();
showVideosPlaylists();
</script>