docs: Updating N release notes for DP3 am: 58d55042

@jd:body

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<h2>In this document</h2>

<ul>

  <li><a href="#dp3">Developer Preview 3</a>

    <ul>

      <li><a href="#general">General advisories</a></li>

      <li><a href="#new">New in DP3</a></li>

      <li><a href="#ki">Known issues</a></li>

    </ul>

  </li>

  <li><a href="#dp2">Developer Preview 2</a></li>

  <li><a href="#dp1">Developer Preview 1</a></li>

</ul>

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<h2>See Also</h2>

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  <li></li>

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<p>

  Two primary support channels are available to you when developing and testing

  with the Android N Developer Preview: Please file bugs at <a href=

  <div class="cols">

    <div class="col-6of12">

      <p>

        <em>Date: April 2016<br>

        Builds: TODO<br>

        <em>Date: May 2016<br>

        Builds: NPD35K<br>

        Emulator support: x86 &amp; ARM (32/64-bit)<br>

        Google Play services: TODO</em>

        Google Play services: 8.4</em>

      </p>

    </div>

  </div>

</div>

<h3 id="general">General advisories</h3>

<p>

  This Developer Preview release is for <strong>app developers and other early

  adopters</strong> and is available for daily use, development, or

  compatibility testing. Please be aware of these general notes about the

  release:

</p>

<ul>

  <li>This release may have various <strong>stability issues</strong> on

    supported devices. Users may encounter system instability, such as kernel

    panics and crashes.

  </li>

  <li>Some apps <strong>may not function as expected</strong> on the new

  platform version. This includes Google’s apps as well as other apps. You can

  let developers know about app compatibility issues using the <a href=

  "{@docRoot}preview/bugs">N Developer Preview issue tracker</a>.

  </li>

  <li>Developer Preview 3 is <strong>Compatibility Test Suite (CTS)

  approved</strong> on these devices: Nexus 5X, Nexus 6, Nexus 6P, and Pixel

  C. Apps that depend on CTS approved builds should

  work normally on these devices (Android Pay for example).

  </li>

  <li>Developer Preview 3 is <strong>available on all supported

  devices:</strong> Nexus 5X, Nexus 6, Nexus 6P, Nexus 9, Nexus Player, Pixel

  C, General Mobile 4G (Android One), as well as Sony Xperia Z3 (D6603 and

  D6653 models).

  </li>

</ul>

<h3 id="new">New in DP3</h3>

<h4 id="">VR Mode for Android</h4>

<p>

  Android N adds platform support and optimizations for a new VR Mode to let

  developers build high quality mobile VR experiences for users. There are a

  number of performance enhancements, including access to an exclusive CPU core

  for VR apps. Within your apps, you can take advantage of intelligent

  head-tracking, and stereo notifications that work for VR. Most importantly,

  Android N provides for very low latency graphics.

</p>

<p>

  For more information, see the <a href=

  "https://developers.google.com/vr/android/">Google VR SDK for Android</a>.

</p>

<h4 id="">Sustained performance mode</h4>

<p>

  Android N includes optional support for <a href=

  "{@docRoot}preview/api-overview.html#sustained_performance_api">sustained

  performance mode</a>, enabling OEMs to provide hints on device performance

  capabilities for long running applications. App developers can then use these

  hints to tune applications for a predictable, consistent level of device

  performance over long periods of time. App developers can try out this new

  API in the developer preview on Nexus 6P devices only.

</p>

<h4>Multiprocess WebView</h4>

<p>

  Starting with version 51 in Android N, WebView will run web content in a

  separate sandboxed process when the developer option "Multiprocess WebView"

  is enabled. The WebView team is looking for feedback on compatibility and

  runtime performance in N before enabling multiprocess WebView in a future

  version of Android. In this version, regressions in startup time, total

  memory usage and software rendering performance are expected.

</p>

<p>

  If you find unexpected issues in multiprocess mode we’d like to hear about

  them. Please get in touch with the WebView team by <a href=

  "https://bugs.chromium.org/p/chromium/issues/entry?template=Webview%20Bugs">

  filing a bug</a>.

</p>

<h4 id="">Keyboard Shortcuts helper</h4>

<p>

  Android N lets users press <code>Meta+/</code> to trigger a <strong>Keyboard

  Shortcuts</strong> screen that displays all shortcuts available both from the

  system and from the app in focus. Developers can add their own shortcuts or

  trigger the Shortcuts screen from their apps. See <a href=

  "{@docRoot}preview/api-overview.html#keyboard_shortcuts_helper">Keyboard

  Shortcuts helper</a> for details.

</p>

<h4 id="">FrameMetrics API</h4>

<p>

  DP3 introduces a new <a href=

  "{@docRoot}preview/api-overview.html#framemetrics_api">FrameMetrics API</a>

  that allows an app to monitor its UI rendering performance by exposing a

  streaming pubsub API to transfer frame timing info for the application’s

  current window. <code>FrameMetricsListener</code> can be used to measure

  interaction-level UI performance in production with higher granularity and

  without the need for a USB connection.

</p>

<h4 id="api-changes">API changes</h4>

<h4 id="api-changes">Feature and API changes</h4>

<dl>

  <dt><a href="{@docRoot}preview/api-overview.html#number-blocking"

    >Number-blocking</a></dt>

  <dd>If an unauthorized user attempts to block or unblock a number, the operation

    now fails with {@link java.lang.SecurityException}. (Previously, the

    operation threw {@link java.lang.UnsupportedOperationException}.)</dd>

  <dt><a href="{@docRoot}preview/api-overview.html#tile_api">Quick

    Settings Tile API</a></dt>

  <dd>The system now uses the activity's metadata to decide on the tile mode.

  <dt>

    Launcher Shortcuts and the Launcher Shortcuts API

  </dt>

  <dd>

    We’ve decided to defer this feature to a future release of Android. We plan

    to remove the Launcher Shortcuts APIs (ShortcutManager and others) from the

    public Android N API starting in the next developer preview.

  </dd>

  <dt>

    WebView Javascript run before page load

  </dt>

  <dd>

    Starting with apps targeting Android N, the Javascript context is reset

    when a new page is loaded. Currently, the context is carried over for the

    first page loaded in a new {@link android.webkit.WebView} instance.

    Developers looking to inject Javascript into the {@link

    android.webkit.WebView} should execute the script after the page has

    started to load.

  </dd>

  <dt>

    WebView Geolocation on insecure origins

  </dt>

  <dd>

    Starting with apps targeting Android N, the geolocation API will only be

    allowed on secure origins (over HTTPS.) This policy is designed to protect

    users' private information when they're using an insecure connection.

  </dd>

  <dt>

    Data Saver

  </dt>

  <dd>

    Starting in Developer Preview 3, apps can use use an intent to display a

    system dialog that lets the user directly add the app to the Data Saver

    exemption whitelist. See the <a href=

    "{@docRoot}preview/api-overview.html#data_saver">Data Saver

    documentation</a> for details.

  </dd>

  <dt>

    <a href=

    "{@docRoot}preview/api-overview.html#number-blocking">Number-blocking</a>

  </dt>

  <dd>

    If an unauthorized user attempts to block or unblock a number, the

    operation now fails with {@link java.lang.SecurityException}. (Previously,

    the operation threw {@link java.lang.UnsupportedOperationException}.)

  </dd>

  <dt>

    <a href="{@docRoot}preview/api-overview.html#tile_api">Quick Settings Tile

    API</a>

  </dt>

  <dd>

    The system now uses the activity's metadata to decide on the tile mode.

    (Previously, tile mode was determined by the return value of

    <code>TileService.onTileAdded()</code>.) For more information, see

    <code>TileService.META_DATA_ACTIVE_TILE</code> in the downloadable

    <a href="{@docRoot}preview/setup-sdk.html#docs-dl">API Reference</a>.

    <code>TileService.META_DATA_ACTIVE_TILE</code> in the downloadable <a href=

    "{@docRoot}preview/setup-sdk.html#docs-dl">API Reference</a>.

  </dd>

</dl>

<h4 id="dp2-fixes">Fixes for issues reported by developers</h4>

<h4 id="dp3-fixes">Fixes for issues reported by developers</h4>

<p>

  A number of issues reported by developers have been fixed, including:

</p>

<ul>

  <li>TODO</li>

  <li>Bluetooth Audio playback interrupted after 1 song (bug <a href=

  "https://code.google.com/p/android/issues/detail?id=206889">206889</a>)

  </li>

  <li>Pixel C Consistently Crashes (bug <a href=

  "https://code.google.com/p/android/issues/detail?id=206962">206962</a>)

  </li>

  <li>Clock and Toast notification issues (bug <a href=

  "https://code.google.com/p/android/issues/detail?id=203094">203094</a>)

  </li>

  <li>Pixel C reboots when connected to MacBook Pro via USB C Cable (bug

  <a href=

  "https://code.google.com/p/android/issues/detail?id=205432">205432</a>)

  </li>

  <li>Calandar offset by one day (bug <a href=

  "https://code.google.com/p/android/issues/detail?id=203002">203002</a>)

  </li>

  <li>TelephonyManager.getAllCellInfo returning invalid data (bug <a href=

  "https://code.google.com/p/android/issues/detail?id=203022">203022</a>)

  </li>

  <li>Nexus 6p, Bluetooth keeps disconnecting (bug <a href=

  "https://code.google.com/p/android/issues/detail?id=208062">208062</a>)

  </li>

</ul>

<h3 id="general">General advisories</h3>

<p>For the full list of fixed issues, see <a href="https://goo.gl/6uCKtf">the

issue tracker</a>.</p>

<p>

  This Developer Preview release is for <strong>app developers only</strong>

  and is designed for use in compatibility testing and early development only.

  Please be aware of these general notes about the release:

</p>

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

<h4>Accessibility</h4>

<ul>

  <li>Unable to listen to TTS output when pitch is set near maximum level.

  </li>

  <li>TODO</li>

  <li>Accessibility features and settings may be disrupted with the user adds a

  Work profile, including magnification gesture and setting. Accessibility

  state is restored when the user next touches the associated settings.

  </li>

</ul>

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

<h4>Camera</h4>

<p>TODO</p>

<ul>

  <li>The Camera app has exhibited instability; it may crash in various

    circumstances, such as when launched in multi-window mode.

  </li>

<h4>Device-specific issues</h4>

  <li>Pressing the shutter continuously in panorama mode may cause the Camera

  app to crash.

  </li>

</ul>

<h4>Audio</h4>

<ul>

  <li>A platform audio player issue prevents some apps from functioning

  normally. For example, Skype and other apps are affected by this issue.

  </li>

</ul>

<h4>Connectivity</h4>

<ul>

  <li>When a Bluetooth Low Energy (BLE) peripheral role device advertises a

  service and a BLE central role device connects, the peripheral role device

  disconnects very quickly.

  </li>

  <li>Wi-Fi connection may be dropped when the screen is off.

  </li>

  <li>RFCOMM connections are unstable and may result in data corruption and

  dangling connections.

  </li>

  <li>The active network state ({@link android.net.NetworkInfo#getState

  NetworkInfo.getState()} and {@link android.net.NetworkInfo#getDetailedState

  NetworkInfo.getDetailedState()}) might return incorrect values during some

  restricted background scenarios.

  </li>

</ul>

<h4>

  Launcher

</h4>

<ul>

  <li>The default launcher’s All Apps tray may become unresponsive after

  cycling screen off / screen on. Returning to the homescreen and relaunching

  the All Apps tray may resolve this issue.

  </li>

</ul>

<p>TODO</p>

<h4>

  Keyboard

</h4>

<ul>

  <li>When updating a device running Android 6.0 or earlier to the N Developer

  Preview, Google Keyboard does not preserve preferences data such as recent

  emoji and sound settings.

  </li>

  <li>Google Indic Managed Keyboard may be unstable.

  </li>

  <li>When entering text in a password field, the user can select Russian as

  the input language but the keyboard remains in English. This prevents the

  user from entering Russian-language passwords.

  </li>

</ul>

<h4>

  Locale and languages

</h4>

<ul>

  <li>When using a right-to-left (RTL) locale, the system may unexpectedly

  switch to left-to-right (LTR) presentation after restarting the device.

  </li>

</ul>

<h4>Media</h4>

<ul>

  <li>Media playback be be unreliable on Nexus 9 and Nexus Player, including

  issues playing HD video.

  </li>

</ul>

<h4>

  Multi-window mode

</h4>

<ul>

  <li>Device may freeze when changing orientation in multi-window mode.

  </li>

  <li>Several apps currently have issues with multi-window mode:

    <ul>

      <li>The system UI may crash when docking Settings &gt; Display &gt;

      Screen brightness to multi-window.

      </li>

      <li>The Camera app may crash when launched in multi-window mode.

      </li>

      <li>YouTube may crash when launched into multi-window mode. To fix the

      issue, you can clear the YouTube app’s data at Storage > Apps >

      YouTube.

      </li>

    </ul>

  </li>

</ul>

<h4>

  Google Play services

</h4>

<ul>

  <li>Apps using Google Cast through Google Play services may be unstable when

  the user selects a system locale that uses letters and numbers outside of the

  ASCII range.

  </li>

</ul>

<h4>

  Work and enterprise

</h4>

<ul>

  <li>The Device Policy app may crash when the user unlocks the device with the

  "device policy status" screen pinned.

  </li>

  <li>After setting up a work profile with file-based encryption enabled and

  then turning off Work, users must unlock primary profile screen lock to once

  again access Work apps.

  </li>

  <li>Cannot open work apps after reboot in file-based-encryption with work

  mode off.

  </li>

  <li>Device reboots when removing the security pattern lock and opening work

  app/personal app in the multi-window.

  </li>

  <li>Setting DISALLOW_VPN_CONFIG is causing the consent dialog to appear in

  always-on-vpn set by Device Policy Client.

  </li>

  <li>Traffic is not locked down until VPN is connected in always-on-vpn mode.

  </li>

</ul>

<h4>

  External storage

</h4>

<ul>

  <li>Apps may become unstable when the user moves them from internal storage

  to adoptable external storage (this can include SD card or devices attached

  over USB).

  </li>

</ul>

<h4>

  Screen zoom and multiple APKs in Google Play

</h4>

<ul>

  <li>On devices running Android N, Google Play services 9.0.83 incorrectly reports

  the current screen density rather than the stable screen density. When screen

  zoom is enabled on these devices, this can cause Google Play to select a

  version of a multi-APK app that’s designed for smaller screens. This issue is

  fixed in the next version of Google Play services and will be included in a

  later Developer Preview release.

  </li>

  <li>On devices running Android N, Google Play services 9.0.83 currently reports

  Vulkan support but not Vulkan version. This can cause Google Play to select a

  version of a multi-APK app that’s designed for lower Vulkan support on

  devices with higher version support. Currently, the Google Play Store does

  not accept uploads of Apps which use Vulkan version targeting. This support

  will be added to the Google Play Store in the future and fixed in the next

  version of Google Play services (to be included in a later Developer Preview

  release) any N devices using the version of Google Play services 9.0.83 will

  continue to receive versions of Apps targeting basic Vulkan support.

  </li>

</ul>

<h4 id="">Notifications</h4>

<ul>

  <li>MessagingStyle does not show notifications with "null" (self) sender.

  </li>

</ul>

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<h4>Device-specific issues</h4>

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  <dt>

  </dd>

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<h2 id="dp2">Developer Preview 2</h2>