Docs: First pass at migrating the old M Preview Program Overview to N

@jd:body

<div class="cols" style=

"background-color:#f2daf5; padding: 5px 0;margin-bottom:1em; text-align:center;">

<h3>

    Developer Preview 3 is now available

  </h3>

  <p>Includes final SDK and near-final system images</p>

   <div style="margin:auto 1em">

 <ul class="dac-section-links">

    <li class="dac-section-link">

      <a href="{@docRoot}preview/support.html#preview3-notes">

      <span class="dac-sprite dac-auto-chevron"></span>

      Read the Notes</a>

    </li>

    <li class="dac-section-link">

      <a href="{@docRoot}preview/support.html#preview3-get">

      <span class="dac-sprite dac-auto-chevron"></span>

      Get the Update</a>

    </li>

    <li class="dac-section-link">

      <a href="https://code.google.com/p/android-developer-preview/">

      <span class="dac-sprite dac-auto-chevron"></span>

      Report Issues</a>

    </li>

  </ul>

  </div>

</div>

<p>

  Welcome to the <strong>Android M Developer Preview</strong>, a program that gives you

  Welcome to the <strong>Android N Developer Preview</strong>, a program that gives you

  everything you need to test and optimize your apps for the next version of

  Android. It's free, and you can get started right away just by downloading

  the M Developer Preview tools.

  the Preview tools.

</p>

<div style="background-color:#eceff1;padding:1em;">

      </h5>

      <p>

        Run and test your apps on Nexus 5, 6, 9, and Player (for TV), as well

        Run and test your apps on Nexus 5X, 6P, 9, and Player (for TV), as well

        as emulator.

      </p>

    </div>

      <p>

        Report issues and give us feedback using our <a href=

        "https://code.google.com/p/android-developer-preview/">issue tracker</a>.

        Connect with other developers in the <a

        href="http://g.co/dev/AndroidMDevPreview">M&nbsp;Developer Community</a>.

        Connect with other developers in the <strong>Developer Community</strong>.

      </p>

    </div>

<!--

<p>

  With the M Developer Preview, you'll get an early start on testing your apps,

  With the Preview, you'll get an early start on testing your apps,

  with enough time to make adjustments before the public platform release later

  in the year. We'll provide several updates to the Preview tools in the weeks

  ahead, so you can keep in sync with the latest changes as the platform moves

  toward launch.

</p>

<img src="{@docRoot}preview/images/m-preview-timeline.png" alt=

"Preview program timeline" id="timeline">

<p>

  You can help us improve the platform by <a href=

  "https://code.google.com/p/android-developer-preview/">reporting issues</a>

<h2 id="timeline">

  Timeline and updates

</h2>

<img src="{@docRoot}preview/images/m-preview-timeline-crop.png" alt=

"Preview program timeline" id="timeline">

<p>

  The M Developer Preview runs from May 28 until the final Android M public release planned for Q3

  2015.

  The Preview runs from March 9 until the final Android N public release planned for Q3

  2016.

</p>

<p>

  At key development milestones, we’ll deliver updates for your test devices.

  The milestones are

</p>

<ul>

  <li>

    <strong><a href="{@docRoot}preview/download_mp1.html">Preview&nbsp;1</a></strong> (available).

  </li>

  <li>

    <strong><a href="{@docRoot}preview/download_mp2.html">Preview&nbsp;2</a></strong> (available).

  </li>

  <li>

  <strong><a href="{@docRoot}preview/download.html">Preview&nbsp;3</a></strong>

    (final APIs and official Android 6.0 SDK, available).

  </li>

</ul>

<p>

  These updates culminate in the <strong>official Android 6.0 SDK</strong> (now available),

  which lets you build with the final APIs for the new version of Android, as well as

  near-final system images to let you test system behaviors and features.

</p>

<p>

  As you test and develop on Android M, we strongly recommend <strong>keeping

  As you test and develop on Android N, we strongly recommend <strong>keeping

  your development environment up-to-date</strong> as Preview updates are released.

  To make the process easier, we'll deliver <strong>updates over-the-air

  (OTA)</strong> to devices already flashed to a Preview build, as well as

  providing system images that you can download and flash manually.

</p>

<p class="note">

  <strong>Note:</strong> Developer Preview 3 includes final APIs and near-final

  system images available by both download and OTA. At the full public release of

  Android M later in Q3, final system images will be available by download only,

  so you'll need to <strong>flash manually</strong> to

  your test devices.</strong>

</p>

<p>

  We’ll notify you when Preview updates are available via the <a href=

  "http://android-developers.blogspot.com/">Android Developers Blog</a>, as

  well as this site and the

  <a href="http://g.co/dev/AndroidMDevPreview">Android M Developer Community</a>.

  well as this site and the <strong>Android N Developer Community</strong>.

</p>

<h2 id="preview_tools">

</h2>

<p>

  The M Developer Preview includes everything you need to test your existing

  The Preview includes everything you need to test your existing

  apps on a variety of screen sizes, network technologies, CPU/GPU chipsets,

  and hardware architectures.

</p>

</p>

<ul>

  <li><strong>Official Android 6.0 SDK and tools</strong>

  <li><strong>Official Preview SDK and tools</strong>

  </li>

  <li>M Developer Preview <strong>emulator system image</strong> (32-bit &amp;

  <li>N Preview <strong>emulator system image</strong> (32-bit &amp;

  64-bit)

  </li>

  <li>M Developer Preview <strong>emulator system Image for Android TV</strong>

  <li>N Preview <strong>emulator system Image for Android TV</strong>

  (32-bit)

  </li>

</ul>

<ul>

  <li>

    <strong>Nexus 5</strong> (GSM/LTE) “hammerhead” device system image

    <strong>Nexus 5X</strong> (GSM/LTE) "bullhead" device system image

  </li>

  <li>

    <strong>Nexus 6</strong> “shamu” device system image

    <strong>Nexus 6P</strong> (GSM/LTE) “angler” device system image

  </li>

  <li>

  <li>

    <a href="{@docRoot}preview/support.html#release-notes">Release notes</a> for the current version

    of the M Developer Preview, including change notes and diff reports.

    of the Preview, including change notes and diff reports.

  </li>

</ul>

</h4>

<p>

  Use these support resources as you test and develop on the M

  Developer Preview:

  Use these support resources as you test and develop on the Preview:

</p>

<ul>

  <li><a href="https://code.google.com/p/android-developer-preview/">M

  Developer Preview Issue Tracker</a> is your <strong>primary feedback

  <li><a href="https://code.google.com/p/android-developer-preview/">Preview Issue Tracker</a>

  is your <strong>primary feedback

  channel.</strong> You can report bugs, performance issues, and general

  feedback through the issue tracker. You can also check for <a

  href="https://code.google.com/p/android-developer-preview/wiki/KnownIssues">known issues</a>

  and find workaround steps.

  </li>

  <li>The <a href="http://g.co/dev/AndroidMDevPreview">Android M Developer

  Community</a> is a Google+ community where you can <strong>connect with

  other developers</strong> working with Android M. You can share

  <li><strong>Android N Developer Community</strong> is a Google+ community where you can

  <strong>connect with other developers</strong> working with Android M. You can share

  observations or ideas or find answers to questions about Android M.

  </li>

</ul>

  Final SDK, targeting, and publishing

</h2>

<p>

   <p>With Developer Preview 3, the platform APIs are now official (API level 23) and the

   <strong>official Android 6.0 SDK is now available</strong>.  We recommend updating your environment

   right away through Android Studio. Once you've updated your environment, you can target

   the new API level, compile against the new platform, and publish at your convenience

   to Google Play (including alpha, beta, or release channels).

  <p>If you want to opt out

  of compatibility behaviors (which is strongly recommended),

  you can target the Android 6.0 platform by setting your app's <code><a href=

  "/guide/topics/manifest/uses-sdk-element.html">targetSdkVersion</a></code>

  to <code>“23”</code>.

</p>

  <p>Before releasing an app that targets API level 23, we strongly

  recommend distributing it to a group of testers through the new <a

  href="http://android-developers.blogspot.com/2015/07/iterate-faster-on-google-play-with.html"> 

  beta testing features available in the Google Play Developer Console. See the

  <a href="https://support.google.com/googleplay/android-developer/answer/3131213">Help

  Center article</a> for more information. 

</p>

<h2 id="get_started">

  How to get started

</h2>

<p>

  To get started testing your app with Android M:

  To get started testing your app with the Preview:

</p>

<ol>

  </li>

  <li>Review the <a href="{@docRoot}reference/packages.html">API

  Reference</a> and <a href="{@docRoot}preview/samples.html">M Preview

  Reference</a> and <a href="{@docRoot}preview/samples.html">N Preview

  samples</a> to gain more insight into new API features and how to use them in

  your app.

  </li>

  <li>Join the <a href="http://g.co/dev/AndroidMDevPreview">Android M

  Developer Community</a> to get the latest news and connect with other

  <li>Join the <strong>Android M

  Developer Community</strong> to get the latest news and connect with other

  developers working with the new platform.

  </li>

</ol>

<p>

  Thank you for your participation in the Android M Developer Preview program!

  Thank you for your participation in the Android N Developer Preview program!

</p>