versions/nougat/android-7.0.jd

page.title=Android N for Developers
meta.tags="preview", "androidn"
page.tags="preview", "developer preview"
page.image=images/cards/card-n-apis_2x.png
@jd:body


<div id="tb-wrapper">
<div id="tb">
  <h2></h2>
  <ol>
      <ul style="list-style-type:none;">
        <li><a href="#multi-window_support"> </a></li>
        <li><a href="#notification_enhancements"></a></li>
        <li><a href="#jit_aot">JIT / AOT </a></li>
        <li><a href="#quick_path_to_app_install"></a></li>
        <li><a href="#doze_on_the_go"> Doze</a></li>
        <li><a href="#background_optimizations"></a></li>
        <li><a href="#data_saver"></a></li>
        <li><a href="#vulkan">Vulkan API</a></li>
        <li><a href="#tile_api"> API</a></li>
        <li><a href="#number-blocking"></a></li>
        <li><a href="#call_screening"></a></li>
        <li><a href="#multi-locale_languages"></a></li>
        <li><a href="#emoji"></a></li>
        <li><a href="#icu4">Android  ICU4J API</a></li>
        <li><a href="#gles_32">OpenGL ES 3.2 API</a></li>
        <li><a href="#android_tv_recording">Android TV </a></li>
        <li><a href="#android_for_work">Android for Work</a></li>
        <li><a href="#accessibility_enhancements"></a></li>
        <li><a href="#direct_boot"> </a></li>
        <li><a href="#key_attestation"></a></li>
        <li><a href="#network_security_config"> </a></li>
        <li><a href="#default_trusted_ca"></a></li>
        <li><a href="#apk_signature_v2">APK  v2</a></li>
        <li><a href="#scoped_directory_access"></a></li>
        <li><a href="#keyboard_shortcuts_helper">  </a></li>
        <li><a href="#sustained_performance_api"> API</a></li>
        <li><a href="#vr">VR </a></li>
        <li><a href="#print_svc"></a></li>
        <li><a href="#virtual_files"></a></li>
        <li><a href="#framemetrics_api">FrameMetricsListener API</a></li>
      </ol>
</div>
</div>


<p>Android N N Developer Preview  Android N

 </p>

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


</p>

<h2 id="multi-window_support"> </h2>


<p>Android N
 </p>

  <p> 2  </p>
  <ul>
  <li>Android N  2

2
 </li>

<li>Android TV <a href="{@docRoot}preview/features/picture-in-picture.html">   </a>

</li>
  </ul>

<div class="col-4of10">
<img src="{@docRoot}images/android-7.0/mw-portrait.png" alt="" style="height:460px;padding-left:1em;" id="img-split-screen" />
<p class="img-caption">
  <strong> 1.</strong>
</p>

  </div>

<p>


 </p>

<p>


</p>

<p>
  <a href="{@docRoot}preview/features/multi-window.html"> </a>

</p>

<h2 id="notification_enhancements"></h2>

<p>Android N
</p>

<ul>
  <li>
    <strong></strong>:


  </li>

  <li>
    <strong> </strong>:<code>MessageStyle</code>


  </li>

  <li>
    <strong></strong>:

Android Wear


  </li>

  <li>
    <strong> </strong>:Android   SMS


  </li>

  <li>
    <strong></strong>:2  API


  </li>
</ul>

<div class="col-4of12">
  <img src="{@docRoot}images/android-7.0/notifications-1.png" alt="" style="padding:.5em;max-width:226px">
</div>

<div class="col-4of12">
  <img src="{@docRoot}images/android-7.0/notifications-3.png" alt="" style="padding:.5em;max-width:226px">
</div>

<div class="col-4of12">
  <img src="{@docRoot}images/android-7.0/notifications-2.png" alt="" style="padding:.5em;max-width:226px">
</div>


<p class="img-caption">
  <strong> 2.</strong>
</p>

<p><a href="{@docRoot}preview/features/notification-updates.html"></a>

</p>


<h2 id="jit_aot"> JIT / AOT </h2>

<p>Android N   Just in TimeJIT ART Android

JIT ART  Ahead of TimeAOT

</p>

<p>ART  AOT / JIT
ART


</p>

<p> RAM

</p>

<p>ART

</p>

<h2 id="quick_path_to_app_install"></h2>

<p>ART  JIT  1
Android 6.0

  </p>

<h2 id="doze_on_the_go"> Doze</h2>

<p>Android 6.0  Doze  CPU

 </p>

<p>Android N  Doze Doze  CPU


</p>


<img src="/preview/images/doze-diagram-1.png" alt="" id="figure1" />
<p class="img-caption">
  <strong> 3.</strong> Doze

</p>


<p>Doze


 Doze
</p>

<p>Doze  CPU  {@link
android.os.PowerManager.WakeLock}{@link android.app.AlarmManager} GPS / Wi-Fi

</p>

<p> Doze  Doze

<a href="{@docRoot}training/monitoring-device-state/doze-standby.html#assessing_your_app"> Doze </a>
</p>

<h2 id="background_optimizations">Project Svelte:</h2>

<p>Project Svelte Android  RAM
Android N  Project Svelte
 </p>

<p> RAM


 </p>

<p>Android 5.0  {@link android.app.job.JobScheduler}


JobScheduler  JobScheduler
 </p>

<p>
   1 Google Play  <a href="https://developers.google.com/android/reference/com/google/android/gms/gcm/GcmNetworkManager"><code>GCMNetworkManager</code></a>   Android


</p>

<p><code>JobScheduler</code>  <code>GCMNetworkManager</code> Android N


</p>

<p>
{@link android.net.ConnectivityManager#CONNECTIVITY_ACTION}{@link
  android.hardware.Camera#ACTION_NEW_PICTURE}{@link
  android.hardware.Camera#ACTION_NEW_VIDEO} Android N  3
N Developer Preview <code>JobScheduler</code>  API

 </p>

<p>
  <a href="{@docRoot}preview/features/background-optimization.html"></a>

</p>


<h2 id="data_saver"></h2>

<div class="col-5of12" style="margin-right:1.5em;">
<img src="{@docRoot}images/android-7.0/datasaver.png" style="border:2px solid #ddd">

<p class="img-caption" style="padding-right:2em;">
  <strong> 4.</strong> [Settings]
</p>
  </div>

<p>

 </p>

<p>Android N


 </p>

<p> [<strong>Settings</strong>]


</p>

<p>Android N  {@link android.net.ConnectivityManager} <a href="{@docRoot}preview/features/data-saver.html#status"></a><a href="{@docRoot}preview/features/data-saver.html#monitor-changes"></a>


</p>


<h2 id="vulkan">Vulkan API</h2>

<p>
  Android N  3D  API  <a href="http://www.khronos.org/vulkan" class="external-link">Vulkan</a> <a href="https://www.khronos.org/opengles/" class="external-link">OpenGL ES</a> Vulkan  Khronos  3D


</p>

<p>
  Vulkan  CPU  GPU
Vulkan


</p>

<p>
  Vulkan Android NDK

</p>

<ul>
  <li>
  </li>

  <li>
  </li>

  <li>SPIR-V
  </li>

  <li>SPIR-V
  </li>
</ul>

<p>
  Vulkan Nexus 5XNexus 6PNexus Player  Vulkan
Vulkan

</p>

<p>
  <a href="{@docRoot}ndk/guides/graphics/index.html">API </a>
</p>

<h2 id="tile_api"> API</h2>


<div style="float:right;max-width:320px">
<img src="{@docRoot}images/android-7.0/quicksettings.png" style="padding-left:1.5em;">

<p class="img-caption" style="padding-left:2em;">
  <strong> 5.</strong>
</p>


  </div><p>
Android N
 </p>

<p>


 </p>

<p>Android N  API  API
</p>

<p>


</p>

<p>


</p>

<p>
   <a href="{@docRoot}preview/setup-sdk.html#docs-dl">API </a> <code>android.service.quicksettings.Tile</code>

</p>


<h2 id="number-blocking"></h2>

<p>Android N   API
 SMS

</p>

<p>Android

</p>

<ul>
  <li>
  <li>

  <li>
</ul>

<p>Android  VOIP


</p>

<p>
   <a href="{@docRoot}preview/setup-sdk.html#docs-dl">API </a> <code>android.provider.BlockedNumberContract</code>


</p>

<h2 id="call_screening"></h2>

<p>
  Android N  <code>CallScreeningService</code>  {@link android.telecom.Call.Details Call.Details}


</p>

<ul>
  <li>
  <li>
  <li>
</ul>

<p>
   <a href="{@docRoot}preview/setup-sdk.html#docs-dl">API </a> <code>android.telecom.CallScreeningService</code>


</p>


<h2 id="multi-locale_languages"></h2>


<p>Android N [Settings] <strong></strong>
 API


</p>

<p>Android N
 25
100
</p>

<p><code>LocaleList.GetDefault()</code>
Android N

</p>

<p> <a href="{@docRoot}preview/features/multilingual-support.html"></a>
</p>


<h2 id="emoji"></h2>

<p>
  Android N


</p>

<ul>
  <li>
    <strong></strong>
     {@link android.graphics.Paint#hasGlyph(String)}

  </li>
  <li>
    <strong></strong>


    <a class="external-link" href="http://www.unicode.org/Public/9.0.0/ucd/StandardizedVariants-9.0.0d1.txt"> Unicode </a><em></em>


  </li>
  <li>
    <strong></strong>Android N


{@link android.graphics.Paint#hasGlyph(String)}

<a class="external-link" href="http://unicode.org/emoji/charts/full-emoji-list.html">Unicode </a>


  </li>
</ul>


<h2 id="icu4">Android  ICU4J API</h2>

<p>
  Android N Android  <a href="http://site.icu-project.org/">ICU4J</a> API <code>android.icu</code>
 <code>com.java.icu</code>  <code>android.icu</code>

 ICU4J Android  <code>android.icu</code> API APK


</p>

<p>
  Android ICU4J API <a href="{@docRoot}preview/features/icu4j-framework.html">ICU4J </a>
</p>


<h2 id="gles_32">OpenGL&trade; ES 3.2 API</h2>

<p>Android N OpenGL ES 3.2   </p>

<ul>
  <li> <code>EXT_texture_sRGB_decode</code>  <a class="external-link" href="https://www.khronos.org/registry/gles/extensions/ANDROID/ANDROID_extension_pack_es31a.txt">Android  </a></a>AEP

  <li> HDR
  <li>  BaseVertex
  <li> WebGL
</ul>

<p>Android N  OpenGL ES 3.2  API <code>GLES32</code>
OpenGL ES 3.2 <code>&lt;uses-feature&gt;</code>  <code>android:glEsVersion</code>

 </p>

<p> OpenGL ES OpenGL ES <a href="{@docRoot}guide/topics/graphics/opengl.html">OpenGL ES API </a>
</p>


<h2 id="android_tv_recording">Android TV </h2>

<p>Android N  recording API  Android TV
TV   time-shifting API

 </p>

<p><a href="{@docRoot}preview/features/tv-recording-api.html">Android TV Recording API</a> </p>


<h2 id="android_for_work">Android for Work</h2>

<p>Android for Work Android N  API <a href="{@docRoot}preview/features/afw.html">Android for Work </a>

</p>

<h3 id="work_profile_security_challenge"> </h3>

<p>
  N SDK


 <code>ACTION_SET_NEW_PASSWORD</code> <code>ACTION_SET_NEW_PARENT_PROFILE_PASSWORD</code>


</p>

<p>
   <code>setPasswordQuality()</code><code>setPasswordMinimumLength()</code> PIN


 <code>getParentProfileInstance()</code>  <code>DevicePolicyManager</code>


   <code>setOrganizationColor()</code>  <code>setOrganizationName()</code>


</p>
<h3 id="turn_off_work"> </h3>

<p>


 </p>

<h3 id="always_on_vpn">Always on VPN </h3>

<p>   VPN
 VPN
</p>

<p>
  <code>setAlwaysOnVpnPackage()</code>  <code>getAlwaysOnVpnPackage()</code>  <code>DevicePolicyManager</code>


</p>

<p> VPN Always on VPN  VPN
   <code>android.net.VpnService</code>

 </p>

<p>
   <strong>[Settings] &gt; [More] &gt; [Vpn]</strong> <code>VPNService</code>  Always on VPN


</p>

<h3 id="custom_provisioning"></h3>

<p>
     <code>DevicePolicyManager.EXTRA_PROVISIONING_MAIN_COLOR</code> <code>DevicePolicyManager.EXTRA_PROVISIONING_LOGO_URI</code>


</p>

<h2 id="accessibility_enhancements"></h2>

<p>Android N  [Vision Settings]
 TalkBack

 </p>

<p>

[Settings] &gt; [Accessibility]
</p>

<p>Android N
 API

</p>

<p> <a href="{@docRoot}preview/setup-sdk.html#docs-dl">API </a> <code>android.accessibilityservice.GestureDescription</code>
</p>


<h2 id="direct_boot"> </h2>

<p>


</p>

<p> Android N


 </p>

<p>


<code>LOCKED_BOOT_COMPLETED</code>


 </p>

<a href="{@docRoot}preview/features/direct-boot.html"> </a></p>
</p>


<h2 id="key_attestation"></h2>

<p>Android
Linux Android

</p>

<p>Android N
 RSA  EC


 </p>

<p> X.509

 ECDSA


</p>

<p> Android  <a class="external-link" href="https://source.android.com/security/verifiedboot/verified-boot.html#bootloader_requirements"></a> <a class="external-link" href="https://source.android.com/security/trusty/index.html">Trusted Execution EnvironmentTEE</a>


</p>

<ul>
<li> OS </li>
<li><a href="https://source.android.com/security/verifiedboot/index.html" class="external-link"></a> </li>
  </ul>

<p><a href="https://source.android.com/security/keystore/" class="external-link"></a>
</p>

<p>Android N
</p>

<h2 id="network_security_config"> </h2>

<p>Android N  APIX509TrustManager  HTTPSTLS<em></em>


</p>

  <p></p>
<ul>
<li><b>  </b>CA
 CA

</li>
<li><b></b>


</li>
<li><b> </b>
</li>
<li><b></b>
</li>
</ul>

<p><a href="{@docRoot}preview/features/security-config.html"> </a>
</p>

<h2 id="default_trusted_ca"></h2>

<p>Android N CA
 CA  Android N <a href="{@docRoot}preview/features/security-config.html"> </a> CA


</p>

<h2 id="apk_signature_v2">APK  v2</h2>

<p>
  Android N APK  v2 APK

Android Studio 2.2  Gradle 2.2  Android  APK  v2 JAR


</p>

<p>
  APK  v2
APK  v2
Android Studio 2.2  Gradle 2.2  Android

  <code>build.gradle</code> <code>v2SigningEnabled false</code>


</p>

<pre>
  android {
    ...
    defaultConfig { ... }
    signingConfigs {
      release {
        storeFile file("myreleasekey.keystore")
        storePassword "password"
        keyAlias "MyReleaseKey"
        keyPassword "password"
        <strong>v2SigningEnabled false</strong>
      }
    }
  }
</pre>

<p class="caution"><strong>:</strong> APK  v2

APK  v2  <code>zipalign</code>

</p>

<p>
  Android Studio <a href="{@docRoot}studio/publish/app-signing.html#release-mode"></a>Gradle  Android <a href="{@docRoot}studio/build/build-variants.html#signing"></a> Android Studio


</p>

<h2 id="scoped_directory_access"></h2>

<p>Android N  API SD  <a href="{@docRoot}guide/topics/data/data-storage.html#filesExternal"></a>

 API  <code>Pictures</code>
<code>READ_EXTERNAL_STORAGE</code>  API


</p>

<p> API
 API  UI

</p>

<p><a href="{@docRoot}preview/features/scoped-folder-access.html"></a>

</p>

<h2 id="keyboard_shortcuts_helper">  </h2>

<p>
Android N  Alt  + / <em> </em>


 <a href="{@docRoot}preview/setup-sdk.html#docs-dl">API </a> <code>Activity.onProvideKeyboardShortcuts()</code>


</p>

<p>
   {@code Activity.requestKeyboardShortcutsHelper()}

</p>

<h2 id="sustained_performance_api"> API</h2>

<p>


</p>

<p>
Android N <em></em>OEM


</p>

<p>
 N Developer Preview  API Nexus 6P


 {@code Window.setSustainedPerformanceMode()}


</p>

<h2 id="vr">VR </h2>

<p>
Android N  VR   VR
VR  CPU VR


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

</p>


<h2 id="print_svc"></h2>

<p>
  Android N

</p>

<p>
   2

</p>

<ul>
  <li><code>PrinterInfo.Builder.setResourceIconId()</code>  ID

  </li>

  <li><code>PrinterInfo.Builder.setHasCustomPrinterIcon()</code> <code>android.printservice.PrinterDiscoverySession.onRequestCustomPrinterIcon()</code>


  </li>
</ul>

<p>
  <code>PrinterInfo.Builder.setInfoIntent()</code>

</p>

<p>
  <code>android.printservice.PrintJob.setProgress()</code>  <code>android.printservice.PrintJob.setStatus()</code>


</p>

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

<h2 id="framemetrics_api">FrameMetricsListener API</h2>

<p>
FrameMetricsListener API  UI
 API   Pub / Sub API
<code><a href="{@docRoot}tools/help/shell.html#shellcommands">adb shell</a>
dumpsys gfxinfo framestats</code>  120

</p>

<p>
FrameMetricsListener USB   UI
 API {@code adb shell dumpsys gfxinfo}


  UI


</p>

<p>
<code>FrameMetricsListener.onMetricsAvailable()</code>
 <a href="{@docRoot}preview/setup-sdk.html#docs-dl">API </a> {@code FrameMetricsListener}


</p>

<p>
 API  {@code FrameMetrics}    {@code UNKNOWN_DELAY_DURATION}{@code INPUT_HANDLING_DURATION}{@code ANIMATION_DURATION}{@code LAYOUT_MEASURE_DURATION}{@code DRAW_DURATION}{@code SYNC_DURATION}{@code COMMAND_ISSUE_DURATION}{@code SWAP_BUFFERS_DURATION}{@code TOTAL_DURATION}{@code FIRST_DRAW_FRAME}


</p>


<h2 id="virtual_files"></h2>

<p>
   Android    Google


</p>

<p>
  Android N   <em></em>
{@link android.content.Intent#ACTION_VIEW}  URI  {@link android.provider.DocumentsProvider}


Android N

</p>

<p>
   URI {@link android.content.Intent}   UI
 {@link android.content.ContentResolver#openInputStream(Uri) openInputStream()} {@link android.content.Intent#CATEGORY_OPENABLE}


</p>

<p>
  {@link android.app.Activity#onActivityResult onActivityResult()}

    URI

</p>

<pre>
  // Other Activity code ...

  final static private int REQUEST_CODE = 64;

  // We listen to the OnActivityResult event to respond to the user's selection.
  &#64;Override
  public void onActivityResult(int requestCode, int resultCode,
    Intent resultData) {
      try {
        if (requestCode == REQUEST_CODE &amp;&amp;
            resultCode == Activity.RESULT_OK) {

            Uri uri = null;

            if (resultData != null) {
                uri = resultData.getData();

                ContentResolver resolver = getContentResolver();

                // Before attempting to coerce a file into a MIME type,
                // check to see what alternative MIME types are available to
                // coerce this file into.
                String[] streamTypes =
                  resolver.getStreamTypes(uri, "*/*");

                AssetFileDescriptor descriptor =
                    resolver.openTypedAssetFileDescriptor(
                        uri,
                        streamTypes[0],
                        null);

                // Retrieve a stream to the virtual file.
                InputStream inputStream = descriptor.createInputStream();
            }
        }
      } catch (Exception ex) {
        Log.e("EXCEPTION", "ERROR: ", ex);
      }
  }
</pre>

<p>
   <a href="{@docRoot}guide/topics/providers/document-provider.html">  </a>


</p>