docs/html/preview/support.jd - LeafOS-Project/android_frameworks_base - Gitiles

 page.title=Support and Release Notes
 page.tags="preview", "developer preview"
 page.image=images/cards/card-support_16-9_2x.png

 @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="#preview3-notes">
       <span class="dac-sprite dac-auto-chevron"></span>
       Read the Notes</a>
     </li>

     <li class="dac-section-link">
       <a href="#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>
   Two primary support channels are available to you when developing and testing
   with the Android M Developer Preview. If you've encountered bugs or have
   feedback about the M Developer Preview, you can <a href=
   "https://code.google.com/p/android-developer-preview/">create an issue</a> on
   our issue tracker. We'll triage the issue for further review and provide
   updates as needed.
 </p>

 <p>
   To discuss issues or ideas with other developers working with Android M, join
   the <a href="http://g.co/dev/AndroidMDevPreview">M Developer Preview Google+
   community</a>.
 </p>

 <h2 id="preview3-notes">
   Developer Preview 3
 </h2>

 <div class="wrap">
   <div class="cols">
     <div class="col-9of16">
       <p>
         <em>Date: August 2015<br>
         Build: MPA44I<br>
         Hardware support: Nexus 5, 6, 9, Player<br>
         Emulator support: x86 &amp; ARM 32/64-bit<br>
         Google Play services: 7.8</em>
       </p>
     </div>
   </div>
 </div>

 <p>
   Developer Preview 3 is the <strong>final incremental update</strong>
   to the Android M preview platform that was originally released in May 2015.
   The update includes <strong>final APIs and the official Android 6.0 SDK</strong>,
   as well as near-final system images for testing your apps. The
   updated system images bring a variety of fixes and enhancements across
   the system, including those related to issues reported by developers
   through the external issue tracker.
 </p>

 <p>
   If you are currently developing or testing on Android M, you should <strong>update
   your environment</strong> as soon as possible, so that
   you can begin <strong>final compatibility testing</strong> in preparation for
   the public release to device manufacturers later this year.</p>

 <p class="important">Updating to the Android 6.0 SDK and the latest
    system images 3 ensures that you are building against final
    platform APIs in <strong>API level 23</strong> and testing
    against final behaviors. If you are just getting started,
    follow the instructions in <a href=
   "/preview/setup-sdk.html">Set up the Preview SDK</a>.
 </p>

 <h3>
   What's included
 </h3>

 <p>
   Developer Preview 3 includes the official Android 6.0
   SDK as well as updated preview system images, documentation,
   and samples for developing against the Android 6.0
   development platform.
 </p>

 <ul>
   <li>
     <strong>SDK platform</strong> and <strong>system images</strong> (Nexus and
     emulator) for building and testing. You can download the Android 6.0 SDK and tools from
     the SDK Manager, and the system images are available by over-the-air (OTA)
     update or download (see below).
   </li>

   <li>
     <strong>Updated documentation</strong>. The <a href=
     "{@docRoot}preview/behavior-changes.html">Behavior Changes</a>, <a href=
     "{@docRoot}preview/api-overview.html">API Overview</a>, and <a href=
     "{@docRoot}preview/features/runtime-permissions.html">Permissions</a> documents have
     been updated to reflect the latest changes in the platform. An updated
     <a href="/preview/download.html">Developer Documentation download
     package</a> is available, including full reference docs and API diff
     reports. Reference documentation is also now <a
     href="{@docRoot}reference/packages.html">available online</a>.
   </li>

   <li>
     <strong>Translations</strong> of the documentation are available. Use
     the language selector at the bottom right corner of any page to switch
     languages. Note that some of the translated docs are not yet updated for
     Developer Preview 3.
   </li>

   <li>The <a href="{@docRoot}preview/samples.html">Android M code samples</a> are also
   updated to account for API and behavior changes:
     <ul>
       <li>
         <a href=
         "https://github.com/googlesamples/android-RuntimePermissions">RuntimePermissions</a>
         and <a href=
         "https://github.com/googlesamples/android-RuntimePermissionsBasic">RuntimePermissionsBasic</a>
         are updated to reflect latest permissions API changes, including
         <code>shouldShowRequestPermissionRationale()</code>.
       </li>
       <li>
         Other samples are updated to support runtime permissions.
       </li>
     </ul>
   </li>
 </ul>

 <h3 id="changes">
   Key changes
 </h3>
 <ul>
   <li>General
     <ul>
       <li>Updated the Fingerprint API to enables better error reporting,
         better fingerprint enrollment experience, and enumeration support for greater
         reliability.</li>
       <li>Modified app access to BLE and Wi-Fi scans to require the location permisssion when they
         target Android 6.0 (API level 23) or higher. Apps targeting API 22 or earlier can
         still perform BTLE and WiFi scans, but only when they are in the foreground. While in the background, those apps will get no results from BTLE and WiFi scans.</li>
     </ul>
   </li>
   <li>Accessing accounts
     <ul>
       <li>Updated the behavior of {@link android.accounts.AccountManager} account
         discovery methods.
       </li>
       <li>The GET_ACCOUNTS permission has been deprecated.
       </li>
       <li>Apps targeting API level 24 should start the intent returned by
         newChooseAccountIntent(...) and await the result to acquire a reference
         to the user's selected account. AccountManager methods like getAccounts and
         related methods will only return those accounts managed by
         authenticators that match the signatures of the calling app.
       </li>
       <li>Apps targeting API level 23 or earlier will continue to behave as
         before.
       </li>
     </ul>
   </li>
 </ul>

 <p>
   For a complete list of changes, including renamed and removed APIs, see the API Diff report for
   <a href="{@docRoot}sdk/api_diff/23/changes.html">API level 22 to 23</a>.
 </p>

 <h3 id="ki">
   Known issues
 </h3>

 <ul>
   <li>General issues:
     <ul>
       <li>On LTE devices, including Nexus 9, GPS is not functioning properly, which may
         interfere with navigation services.
       </li>
       <li>During Hangouts calls, users may experience distorted or low audio on some devices.
       </li>
       <li>The Google Apps Device Policy app bundled with MPA44G is unable to set up an Android for
 Work Profile, so you cannot create a new Work Profile with that version of the app. This issue is
 resolved in the Google Apps Device Policy app bundled with MPA44I. Other apps that provide Android
 for Work functionality remain unaffected on either build.
       </li>
     </ul>
   </li>
 </ul>

 <p>
   For a complete list of reported issues, please refer to the <a href=
   "https://code.google.com/p/android/issues/list">open issues list</a> on the
   Developer Preview <a href=
   "https://code.google.com/p/android-developer-preview/">issue tracker</a>.
 </p>

 <h3 id="preview3-get">
   Get Developer Preview 3
 </h3>

 <p>
   You can download the official Android 6.0 SDK platform and
   Developer Preview 3 emulator images from the SDK Manager.
 </p>

 <p>
   Developer Preview 3 system images for supported Nexus devices are available
   by download and by over-the-air (OTA) update. The OTA update is available
   only to supported devices that are currently running a Developer Preview build.
   If your device is running a Developer Preview build, you should automatically receive
   the OTA update within a few days of availability.
 </p>

 <p>
   For instructions on how to download and flash your device to the latest Developer
   Preview, see the links and instructions on the <a href=
   "{@docRoot}preview/download.html">Downloads</a> page.
 </p>

 <p>
   For instructions on how to start developing and testing with Android 6.0
   Marshmallow, read <a href="{@docRoot}preview/setup-sdk.html">Setting
   up the SDK</a>.
 </p>

 <h2 id="preview2-notes">
   Developer Preview 2
 </h2>

 <div class="wrap">
   <div class="cols">
     <div class="col-9of16">
       <p>
         <em>Date: July 2015<br>
         Builds: MPZ79M (Nexus 5, 6, 9), MPZ79N (Nexus Player)<br>
         Hardware support: Nexus 5, 6, 9, Player<br>
         Emulator support: x86 &amp; ARM 32/64-bit<br>
         Google Play services: 7.6</em>
       </p>
     </div>
   </div>
 </div>

 <p>
   Android M Developer Preview 2 is an <strong>incremental update</strong> to
   the Android M preview platform that was originally released in May 2015. The
   update includes a variety of enhancements and bug fixes made across the
   system, including those related to issues reported by developers through the
   external issue tracker.
 </p>

 <p>
   If you are currently developing or testing on Android M, you should
   <strong>update your environment</strong> to Developer Preview 2 as soon as
   possible. This ensures that you are building with the latest platform APIs
   and testing against the latest behaviors. If you are just getting started
   with the Android M Developer Preview SDK, follow the instructions in <a href=
   "{@docRoot}preview/setup-sdk.html">Set up the Preview SDK</a>, then update your
   environment for Developer Preview 2.
 </p>

 <h3>
   What's included
 </h3>

 <p>
   Developer Preview 2 includes an updated SDK with system images,
   documentation, and samples for developing against the latest Android M
   platform.
 </p>

 <ul>
   <li>
     <strong>SDK platform</strong> and <strong>system images</strong> (Nexus and
     emulator) for building and testing. You can download the updated tools from
     the SDK Manager, and the system images are available by over-the-air (OTA)
     update or download (see below).
   </li>

   <li>
     <strong>Updated documentation</strong>. The <a href=
     "{@docRoot}preview/behavior-changes.html">Behavior Changes</a>, <a href=
     "{@docRoot}preview/api-overview.html">API Overview</a>, and <a href=
     "{@docRoot}preview/features/runtime-permissions.html">Permissions</a> documents have
     been updated to reflect the latest changes in the platform. An updated
     <a href="{@docRoot}preview/download.html">Developer Documentation download
     package</a> is available, including full reference docs and API diff
     reports.
   </li>

   <li>
     <strong>Translations</strong> of the documentation are now available. Use
     the language selector at the bottom right corner of any page to switch
     languages. Note that some of the translated docs are not yet updated for
     Developer Preview 2 (coming soon).
   </li>

   <li>The <a href="{@docRoot}preview/samples.html">Android M code samples</a> are also
   updated to account for API and behavior changes:
     <ul>
       <li>
         <a href=
         "https://github.com/googlesamples/android-RuntimePermissions">RuntimePermissions</a>
         / <a href=
         "https://github.com/googlesamples/android-RuntimePermissionsBasic">RuntimePermissionsBasic</a>
         are updated to reflect latest permissions API changes, including
         <code>shouldShowRequestPermissionRationale()</code>.
       </li>
       <li>
         <a href=
         "https://github.com/googlesamples/android-FingerprintDialog">FingerprintDialog</a>
         adds a flow to ask for passwords when new fingerprints are added as
         well as a preference if the app will use fingerprints as a method of
         authentication.
       </li>
     </ul>
   </li>
 </ul>

 <h3 id="changes-p2">
   Key changes
 </h3>

 <ul>
   <li>Permissions changes
     <ul>
       <li>The <code>android.permission.USE_FINGERPRINT</code> permission now
       has "normal" protection level, so it is no longer necessary to request
       this permission directly from the user. The <code>USE_FINGERPRINT</code>
       permission enables fingerprints to be enabled for authentication, but
       does not give the requesting app access to the enrollment/fingerprint
       administration flow.
       </li>

       <li>The <code>android.permission.WRITE_EXTERNAL_STORAGE</code> permission
       has protection level "dangerous", meaning that apps wanting to write to
       external storage will need to request permission from the user at
       runtime. Both <code>READ_EXTERNAL_STORAGE</code> and
       <code>WRITE_EXTERNAL_STORAGE</code> are members of the
       <code>STORAGE</code> permission group.
       </li>

       <li>Remote Bluetooth/Wi-Fi MAC's now require either the
       <code>android.permission.ACCESS_COARSE_LOCATION</code> or
       <code>android.permission.ACCESS_FINE_LOCATION</code> permission.
       </li>

       <li>Some accounts and identity permissions are moved to
       <code>CONTACTS</code> permissions group and others are removed or granted
       based on account type. In particular,
       <code>android.permission.USE_CREDENTIALS</code>,
       <code>android.permission.MANAGE_ACCOUNTS</code>, and
       <code>android.permission.AUTHENTICATE_ACCOUNTS</code> are ungrouped
       pending further changes in a later release.
       </li>

       <li>The Wi-Fi permissions
       <code>android.permission.CHANGE_WIFI_STATE</code>,
       <code>android.permission.CHANGE_WIMAX_STATE</code>, and
       <code>android.permission.CHANGE_WIFI_MULTICAST_STATE</code> now have
       protection level "normal".
       </li>

       <li>The Bluetooth permissions <code>android.permission.BLUETOOTH</code>
       and <code>android.permission.BLUETOOTH_ADMIN</code> now have protection
       level "normal".
       </li>

       <li>Bookmarks and subscribed feeds permissions are removed.
       </li>

       <li>Apps included in the system image are no longer granted dangerous
       permissions automatically. All apps should check for and request
       permissions at runtime.
       </li>

       <li>Introduces the utility method
       <code>Activity.shouldShowRequestPermissionRationale(String)</code>, which
       lets your app see whether users have previously rejected a permission
       request. This lets you know that your app should explain the the user why
       it needs that permission. For more information see the <a href=
       "{@docRoot}preview/features/runtime-permissions.html#explain-need">Permissions</a>
       developer guide.
       </li>
     </ul>
   </li>

   <li>Other changes
     <ul>
       <li>The <code>android.app.AssistContent</code> and
       <code>android.app.AssistStructure</code> classes are moved into a new
       package, <code>android.app.assist</code>.
       </li>

       <li>Bluetooth Stylus APIs are updated and include new callback events.
       The <code>View.OnStylusButtonPressListener</code> class is renamed to
       <code>View.OnContextClickListener</code> and
       <code>GestureDetector.OnStylusButtonPressListener</code> class to <code>
         GestureDetector.OnContextClickListener</code>.
       </li>
     </ul>
   </li>
 </ul>

 <p>
   For a complete list of changes, including renamed and removed APIs, please
   refer to the API Diff Reports included in the <a href=
   "{@docRoot}preview/download.html#docs">Developer Documentation download package</a>.
 </p>

 <h3 id="ki-p2">
   Known issues
 </h3>

 <ul>
   <li>General issues:
     <ul>
       <li>The system Messenger app crashes on the 64-bit emulator.</li>
       <li>After updating to Developer Preview 2, Contacts sync experiences
       intermittent issues. The workaround is to clear and re-sync Contact Storage
       data after update. To clear data, go to <strong>Settings &gt; Apps &gt; Show
       system &gt; Contacts Storage</strong>. Select "Storage" and then
       <strong>Clear data</strong>.</li>
       <li>In YouTube app, it's not possible to share a video. The share window is
       blank.</li>
       <li>The bundled Google Apps Device Policy app included in Developer Preview 2 is unable to
       properly set up an Android for Work Profile, so you cannot create a new Work Profile with this
       app after you update. This issue is specific to the Google Apps Device Policy app, and not the
       Android for Work platform (or our partner EMM providers). As a workaround for users of the
       Google Apps Device Policy app, be sure to create a Work Profile in Developer Preview 1 before
       updating to Developer Preview 2.
       </li>
     </ul>
   </li>
   <li>Issues specific to MPZ79N on Nexus Player:
     <ul>
       <li>Bluetooth share crashes after clearing data. Please <strong>do not
       clear app data for system services</strong>, otherwise you will need to Factory
       Reset your device</li>
       <li>Remote control can experience intermittent connectivity issues. </li>
       <li>Movies show black screen with some ANRs on exiting the video.</li>
       <li>In YouTube app, lower-resolution videos have a green bar at the top
       and some color-ghosting</li>
       </li>
     </ul>
   </li>
 </ul>

 <p>
   For a complete list of reported issues, please refer to the <a href=
   "https://code.google.com/p/android/issues/list">open issues list</a> on the
   Developer Preview <a href=
   "https://code.google.com/p/android-developer-preview/">issue tracker</a>.
 </p>

 <h3 id="preview2-get">
   Get Developer Preview 2
 </h3>

 <p>
   You can download the Developer Preview 2 platform and emulator images from
   the SDK Manager.
 </p>

 <p>
   Developer Preview 2 system images for supported Nexus devices are available
   by download and by over-the-air (OTA) update. The OTA update is available
   only to supported devices that are currently running Developer Preview 1. If
   your devices are running Developer Preview 1, you should automatically receive
   the OTA update within a few days of availability.
 </p>

 <p>
   If you are just getting started with Android M Developer Preview, and want
   to receive Developer Preview 2 via OTA, download the appropriate
   Developer Preview 1 <a href="{@docRoot}preview/download_mp1.html#images">
   system image</a>, and flash it to your device. Then,
   leave the device powered on for several hours. It registers with the
   OTA service, and receives Developer Preview 2 by OTA.
 </p>

 <p>
   For instructions on how to download and flash your device to the Developer
   Preview, see the links and instructions on the <a href=
   "{@docRoot}preview/download.html">Downloads</a> page.
 </p>

 <p>
   For instructions on how to start developing and testing with Android M, read
   <a href="{@docRoot}preview/setup-sdk.html">Setting up the SDK</a>.
 </p>

 <h2 id="preview1-notes">
   Developer Preview 1
 </h2>

 <div class="wrap">
   <div class="cols">
     <div class="col-6of12">
       <p>
         <em>Date: May 2015<br>
         Build: MPZ44Q<br>
         Hardware support: Nexus 5, 6, 9, Player<br>
         Emulator support: x86 &amp; ARM (32/64-bit)<br>
         Google Play services: 7.5</em>
       </p>
     </div>
   </div>
 </div>

 <p>
   Initial release.
 </p>
	page.title=Support and Release Notes
	page.tags="preview", "developer preview"
	page.image=images/cards/card-support_16-9_2x.png

	@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="#preview3-notes">
	<span class="dac-sprite dac-auto-chevron"></span>
	Read the Notes</a>
	</li>

	<li class="dac-section-link">
	<a href="#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>
	Two primary support channels are available to you when developing and testing
	with the Android M Developer Preview. If you've encountered bugs or have
	feedback about the M Developer Preview, you can <a href=
	"https://code.google.com/p/android-developer-preview/">create an issue</a> on
	our issue tracker. We'll triage the issue for further review and provide
	updates as needed.
	</p>

	<p>
	To discuss issues or ideas with other developers working with Android M, join
	the <a href="http://g.co/dev/AndroidMDevPreview">M Developer Preview Google+
	community</a>.
	</p>

	<h2 id="preview3-notes">
	Developer Preview 3
	</h2>

	<div class="wrap">
	<div class="cols">
	<div class="col-9of16">
	<p>
	<em>Date: August 2015<br>
	Build: MPA44I<br>
	Hardware support: Nexus 5, 6, 9, Player<br>
	Emulator support: x86 & ARM 32/64-bit<br>
	Google Play services: 7.8</em>
	</p>
	</div>
	</div>
	</div>

	<p>
	Developer Preview 3 is the <strong>final incremental update</strong>
	to the Android M preview platform that was originally released in May 2015.
	The update includes <strong>final APIs and the official Android 6.0 SDK</strong>,
	as well as near-final system images for testing your apps. The
	updated system images bring a variety of fixes and enhancements across
	the system, including those related to issues reported by developers
	through the external issue tracker.
	</p>

	<p>
	If you are currently developing or testing on Android M, you should <strong>update
	your environment</strong> as soon as possible, so that
	you can begin <strong>final compatibility testing</strong> in preparation for
	the public release to device manufacturers later this year.</p>

	<p class="important">Updating to the Android 6.0 SDK and the latest
	system images 3 ensures that you are building against final
	platform APIs in <strong>API level 23</strong> and testing
	against final behaviors. If you are just getting started,
	follow the instructions in <a href=
	"/preview/setup-sdk.html">Set up the Preview SDK</a>.
	</p>

	<h3>
	What's included
	</h3>

	<p>
	Developer Preview 3 includes the official Android 6.0
	SDK as well as updated preview system images, documentation,
	and samples for developing against the Android 6.0
	development platform.
	</p>

	<ul>
	<li>
	<strong>SDK platform</strong> and <strong>system images</strong> (Nexus and
	emulator) for building and testing. You can download the Android 6.0 SDK and tools from
	the SDK Manager, and the system images are available by over-the-air (OTA)
	update or download (see below).
	</li>

	<li>
	<strong>Updated documentation</strong>. The <a href=
	"{@docRoot}preview/behavior-changes.html">Behavior Changes</a>, <a href=
	"{@docRoot}preview/api-overview.html">API Overview</a>, and <a href=
	"{@docRoot}preview/features/runtime-permissions.html">Permissions</a> documents have
	been updated to reflect the latest changes in the platform. An updated
	<a href="/preview/download.html">Developer Documentation download
	package</a> is available, including full reference docs and API diff
	reports. Reference documentation is also now <a
	href="{@docRoot}reference/packages.html">available online</a>.
	</li>

	<li>
	<strong>Translations</strong> of the documentation are available. Use
	the language selector at the bottom right corner of any page to switch
	languages. Note that some of the translated docs are not yet updated for
	Developer Preview 3.
	</li>

	<li>The <a href="{@docRoot}preview/samples.html">Android M code samples</a> are also
	updated to account for API and behavior changes:
	<ul>
	<li>
	<a href=
	"https://github.com/googlesamples/android-RuntimePermissions">RuntimePermissions</a>
	and <a href=
	"https://github.com/googlesamples/android-RuntimePermissionsBasic">RuntimePermissionsBasic</a>
	are updated to reflect latest permissions API changes, including
	<code>shouldShowRequestPermissionRationale()</code>.
	</li>
	<li>
	Other samples are updated to support runtime permissions.
	</li>
	</ul>
	</li>
	</ul>

	<h3 id="changes">
	Key changes
	</h3>
	<ul>
	<li>General
	<ul>
	<li>Updated the Fingerprint API to enables better error reporting,
	better fingerprint enrollment experience, and enumeration support for greater
	reliability.</li>
	<li>Modified app access to BLE and Wi-Fi scans to require the location permisssion when they
	target Android 6.0 (API level 23) or higher. Apps targeting API 22 or earlier can
	still perform BTLE and WiFi scans, but only when they are in the foreground. While in the background, those apps will get no results from BTLE and WiFi scans.</li>
	</ul>
	</li>
	<li>Accessing accounts
	<ul>
	<li>Updated the behavior of {@link android.accounts.AccountManager} account
	discovery methods.
	</li>
	<li>The GET_ACCOUNTS permission has been deprecated.
	</li>
	<li>Apps targeting API level 24 should start the intent returned by
	newChooseAccountIntent(...) and await the result to acquire a reference
	to the user's selected account. AccountManager methods like getAccounts and
	related methods will only return those accounts managed by
	authenticators that match the signatures of the calling app.
	</li>
	<li>Apps targeting API level 23 or earlier will continue to behave as
	before.
	</li>
	</ul>
	</li>
	</ul>

	<p>
	For a complete list of changes, including renamed and removed APIs, see the API Diff report for
	<a href="{@docRoot}sdk/api_diff/23/changes.html">API level 22 to 23</a>.
	</p>

	<h3 id="ki">
	Known issues
	</h3>

	<ul>
	<li>General issues:
	<ul>
	<li>On LTE devices, including Nexus 9, GPS is not functioning properly, which may
	interfere with navigation services.
	</li>
	<li>During Hangouts calls, users may experience distorted or low audio on some devices.
	</li>
	<li>The Google Apps Device Policy app bundled with MPA44G is unable to set up an Android for
	Work Profile, so you cannot create a new Work Profile with that version of the app. This issue is
	resolved in the Google Apps Device Policy app bundled with MPA44I. Other apps that provide Android
	for Work functionality remain unaffected on either build.
	</li>
	</ul>
	</li>
	</ul>

	<p>
	For a complete list of reported issues, please refer to the <a href=
	"https://code.google.com/p/android/issues/list">open issues list</a> on the
	Developer Preview <a href=
	"https://code.google.com/p/android-developer-preview/">issue tracker</a>.
	</p>

	<h3 id="preview3-get">
	Get Developer Preview 3
	</h3>

	<p>
	You can download the official Android 6.0 SDK platform and
	Developer Preview 3 emulator images from the SDK Manager.
	</p>

	<p>
	Developer Preview 3 system images for supported Nexus devices are available
	by download and by over-the-air (OTA) update. The OTA update is available
	only to supported devices that are currently running a Developer Preview build.
	If your device is running a Developer Preview build, you should automatically receive
	the OTA update within a few days of availability.
	</p>

	<p>
	For instructions on how to download and flash your device to the latest Developer
	Preview, see the links and instructions on the <a href=
	"{@docRoot}preview/download.html">Downloads</a> page.
	</p>

	<p>
	For instructions on how to start developing and testing with Android 6.0
	Marshmallow, read <a href="{@docRoot}preview/setup-sdk.html">Setting
	up the SDK</a>.
	</p>

	<h2 id="preview2-notes">
	Developer Preview 2
	</h2>

	<div class="wrap">
	<div class="cols">
	<div class="col-9of16">
	<p>
	<em>Date: July 2015<br>
	Builds: MPZ79M (Nexus 5, 6, 9), MPZ79N (Nexus Player)<br>
	Hardware support: Nexus 5, 6, 9, Player<br>
	Emulator support: x86 & ARM 32/64-bit<br>
	Google Play services: 7.6</em>
	</p>
	</div>
	</div>
	</div>

	<p>
	Android M Developer Preview 2 is an <strong>incremental update</strong> to
	the Android M preview platform that was originally released in May 2015. The
	update includes a variety of enhancements and bug fixes made across the
	system, including those related to issues reported by developers through the
	external issue tracker.
	</p>

	<p>
	If you are currently developing or testing on Android M, you should
	<strong>update your environment</strong> to Developer Preview 2 as soon as
	possible. This ensures that you are building with the latest platform APIs
	and testing against the latest behaviors. If you are just getting started
	with the Android M Developer Preview SDK, follow the instructions in <a href=
	"{@docRoot}preview/setup-sdk.html">Set up the Preview SDK</a>, then update your
	environment for Developer Preview 2.
	</p>

	<h3>
	What's included
	</h3>

	<p>
	Developer Preview 2 includes an updated SDK with system images,
	documentation, and samples for developing against the latest Android M
	platform.
	</p>

	<ul>
	<li>
	<strong>SDK platform</strong> and <strong>system images</strong> (Nexus and
	emulator) for building and testing. You can download the updated tools from
	the SDK Manager, and the system images are available by over-the-air (OTA)
	update or download (see below).
	</li>

	<li>
	<strong>Updated documentation</strong>. The <a href=
	"{@docRoot}preview/behavior-changes.html">Behavior Changes</a>, <a href=
	"{@docRoot}preview/api-overview.html">API Overview</a>, and <a href=
	"{@docRoot}preview/features/runtime-permissions.html">Permissions</a> documents have
	been updated to reflect the latest changes in the platform. An updated
	<a href="{@docRoot}preview/download.html">Developer Documentation download
	package</a> is available, including full reference docs and API diff
	reports.
	</li>

	<li>
	<strong>Translations</strong> of the documentation are now available. Use
	the language selector at the bottom right corner of any page to switch
	languages. Note that some of the translated docs are not yet updated for
	Developer Preview 2 (coming soon).
	</li>

	<li>The <a href="{@docRoot}preview/samples.html">Android M code samples</a> are also
	updated to account for API and behavior changes:
	<ul>
	<li>
	<a href=
	"https://github.com/googlesamples/android-RuntimePermissions">RuntimePermissions</a>
	/ <a href=
	"https://github.com/googlesamples/android-RuntimePermissionsBasic">RuntimePermissionsBasic</a>
	are updated to reflect latest permissions API changes, including
	<code>shouldShowRequestPermissionRationale()</code>.
	</li>
	<li>
	<a href=
	"https://github.com/googlesamples/android-FingerprintDialog">FingerprintDialog</a>
	adds a flow to ask for passwords when new fingerprints are added as
	well as a preference if the app will use fingerprints as a method of
	authentication.
	</li>
	</ul>
	</li>
	</ul>

	<h3 id="changes-p2">
	Key changes
	</h3>

	<ul>
	<li>Permissions changes
	<ul>
	<li>The <code>android.permission.USE_FINGERPRINT</code> permission now
	has "normal" protection level, so it is no longer necessary to request
	this permission directly from the user. The <code>USE_FINGERPRINT</code>
	permission enables fingerprints to be enabled for authentication, but
	does not give the requesting app access to the enrollment/fingerprint
	administration flow.
	</li>

	<li>The <code>android.permission.WRITE_EXTERNAL_STORAGE</code> permission
	has protection level "dangerous", meaning that apps wanting to write to
	external storage will need to request permission from the user at
	runtime. Both <code>READ_EXTERNAL_STORAGE</code> and
	<code>WRITE_EXTERNAL_STORAGE</code> are members of the
	<code>STORAGE</code> permission group.
	</li>

	<li>Remote Bluetooth/Wi-Fi MAC's now require either the
	<code>android.permission.ACCESS_COARSE_LOCATION</code> or
	<code>android.permission.ACCESS_FINE_LOCATION</code> permission.
	</li>

	<li>Some accounts and identity permissions are moved to
	<code>CONTACTS</code> permissions group and others are removed or granted
	based on account type. In particular,
	<code>android.permission.USE_CREDENTIALS</code>,
	<code>android.permission.MANAGE_ACCOUNTS</code>, and
	<code>android.permission.AUTHENTICATE_ACCOUNTS</code> are ungrouped
	pending further changes in a later release.
	</li>

	<li>The Wi-Fi permissions
	<code>android.permission.CHANGE_WIFI_STATE</code>,
	<code>android.permission.CHANGE_WIMAX_STATE</code>, and
	<code>android.permission.CHANGE_WIFI_MULTICAST_STATE</code> now have
	protection level "normal".
	</li>

	<li>The Bluetooth permissions <code>android.permission.BLUETOOTH</code>
	and <code>android.permission.BLUETOOTH_ADMIN</code> now have protection
	level "normal".
	</li>

	<li>Bookmarks and subscribed feeds permissions are removed.
	</li>

	<li>Apps included in the system image are no longer granted dangerous
	permissions automatically. All apps should check for and request
	permissions at runtime.
	</li>

	<li>Introduces the utility method
	<code>Activity.shouldShowRequestPermissionRationale(String)</code>, which
	lets your app see whether users have previously rejected a permission
	request. This lets you know that your app should explain the the user why
	it needs that permission. For more information see the <a href=
	"{@docRoot}preview/features/runtime-permissions.html#explain-need">Permissions</a>
	developer guide.
	</li>
	</ul>
	</li>

	<li>Other changes
	<ul>
	<li>The <code>android.app.AssistContent</code> and
	<code>android.app.AssistStructure</code> classes are moved into a new
	package, <code>android.app.assist</code>.
	</li>

	<li>Bluetooth Stylus APIs are updated and include new callback events.
	The <code>View.OnStylusButtonPressListener</code> class is renamed to
	<code>View.OnContextClickListener</code> and
	<code>GestureDetector.OnStylusButtonPressListener</code> class to <code>
	GestureDetector.OnContextClickListener</code>.
	</li>
	</ul>
	</li>
	</ul>

	<p>
	For a complete list of changes, including renamed and removed APIs, please
	refer to the API Diff Reports included in the <a href=
	"{@docRoot}preview/download.html#docs">Developer Documentation download package</a>.
	</p>

	<h3 id="ki-p2">
	Known issues
	</h3>

	<ul>
	<li>General issues:
	<ul>
	<li>The system Messenger app crashes on the 64-bit emulator.</li>
	<li>After updating to Developer Preview 2, Contacts sync experiences
	intermittent issues. The workaround is to clear and re-sync Contact Storage
	data after update. To clear data, go to <strong>Settings > Apps > Show
	system > Contacts Storage</strong>. Select "Storage" and then
	<strong>Clear data</strong>.</li>
	<li>In YouTube app, it's not possible to share a video. The share window is
	blank.</li>
	<li>The bundled Google Apps Device Policy app included in Developer Preview 2 is unable to
	properly set up an Android for Work Profile, so you cannot create a new Work Profile with this
	app after you update. This issue is specific to the Google Apps Device Policy app, and not the
	Android for Work platform (or our partner EMM providers). As a workaround for users of the
	Google Apps Device Policy app, be sure to create a Work Profile in Developer Preview 1 before
	updating to Developer Preview 2.
	</li>
	</ul>
	</li>
	<li>Issues specific to MPZ79N on Nexus Player:
	<ul>
	<li>Bluetooth share crashes after clearing data. Please <strong>do not
	clear app data for system services</strong>, otherwise you will need to Factory
	Reset your device</li>
	<li>Remote control can experience intermittent connectivity issues. </li>
	<li>Movies show black screen with some ANRs on exiting the video.</li>
	<li>In YouTube app, lower-resolution videos have a green bar at the top
	and some color-ghosting</li>
	</li>
	</ul>
	</li>
	</ul>

	<p>
	For a complete list of reported issues, please refer to the <a href=
	"https://code.google.com/p/android/issues/list">open issues list</a> on the
	Developer Preview <a href=
	"https://code.google.com/p/android-developer-preview/">issue tracker</a>.
	</p>

	<h3 id="preview2-get">
	Get Developer Preview 2
	</h3>

	<p>
	You can download the Developer Preview 2 platform and emulator images from
	the SDK Manager.
	</p>

	<p>
	Developer Preview 2 system images for supported Nexus devices are available
	by download and by over-the-air (OTA) update. The OTA update is available
	only to supported devices that are currently running Developer Preview 1. If
	your devices are running Developer Preview 1, you should automatically receive
	the OTA update within a few days of availability.
	</p>

	<p>
	If you are just getting started with Android M Developer Preview, and want
	to receive Developer Preview 2 via OTA, download the appropriate
	Developer Preview 1 <a href="{@docRoot}preview/download_mp1.html#images">
	system image</a>, and flash it to your device. Then,
	leave the device powered on for several hours. It registers with the
	OTA service, and receives Developer Preview 2 by OTA.
	</p>

	<p>
	For instructions on how to download and flash your device to the Developer
	Preview, see the links and instructions on the <a href=
	"{@docRoot}preview/download.html">Downloads</a> page.
	</p>

	<p>
	For instructions on how to start developing and testing with Android M, read
	<a href="{@docRoot}preview/setup-sdk.html">Setting up the SDK</a>.
	</p>

	<h2 id="preview1-notes">
	Developer Preview 1
	</h2>

	<div class="wrap">
	<div class="cols">
	<div class="col-6of12">
	<p>
	<em>Date: May 2015<br>
	Build: MPZ44Q<br>
	Hardware support: Nexus 5, 6, 9, Player<br>
	Emulator support: x86 & ARM (32/64-bit)<br>
	Google Play services: 7.5</em>
	</p>
	</div>
	</div>
	</div>

	<p>
	Initial release.
	</p>