Android12

后台限制

• 沉浸模式下的手势导航改进

• 前台服务通知延迟 10s显示，排除以下情况
  • 包含操作按钮通知
  • [foregroundServiceType](https://developer.android.com/guide/topics/manifest/service-element#foregroundservicetype) 为connectedDevice；mediaPlayback；mediaProjection；phoneCall

public final void startForeground(int id, @NonNull Notification notification,
           @ForegroundServiceType int foregroundServiceType) {
       try {
           mActivityManager.setServiceForeground(
                   new ComponentName(this, mClassName), mToken, id,
                   notification, 0, foregroundServiceType);
       } catch (RemoteException ex) {
       }
   }
    
    
    /**
    * Constant corresponding to <code>mediaPlayback</code> in
    * the {@link android.R.attr#foregroundServiceType} attribute.
    * Music, video, news or other media playback.
    */
   public static final int FOREGROUND_SERVICE_TYPE_MEDIA_PLAYBACK = 1 << 1;
    /**
    * Constant corresponding to <code>phoneCall</code> in
    * the {@link android.R.attr#foregroundServiceType} attribute.
    * Ongoing phone call or video conference.
    */
   public static final int FOREGROUND_SERVICE_TYPE_PHONE_CALL = 1 << 2;
   /**
    * Constant corresponding to <code>connectedDevice</code> in
    * the {@link android.R.attr#foregroundServiceType} attribute.
    * Auto, bluetooth, TV or other devices connection, monitoring and interaction.
    */
   public static final int FOREGROUND_SERVICE_TYPE_CONNECTED_DEVICE = 1 << 4;

   /**
    * Constant corresponding to {@code mediaProjection} in
    * the {@link android.R.attr#foregroundServiceType} attribute.
    * Managing a media projection session, e.g for screen recording or taking screenshots.
    */
   public static final int FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION = 1 << 5;

• Notification category 为 通话、导航或媒体播放

  /**
       * Notification category: incoming call (voice or video) or similar synchronous communication request.
       */
      public static final String CATEGORY_CALL = "call";

• android 12 Notification setShowForegroundImmediately

  隐私设置

• mac 地址的限制

• 如果应用以 Android 12 为目标平台，则该 API 会返回 null。

• 如果应用以 Android 11 或更低版本为目标平台，则该 API 将返回硬编码占位值：02:00:00:00:00:00

• 推荐使用 [ConnectivityManager](https://developer.android.com/reference/android/net/ConnectivityManager) 不是 [NetworkInterface](https://developer.android.com/reference/java/net/NetworkInterface) getifaddrs()， NetlinkSocketAddress

  安全性 窗口

• 关键字

  Untrusted touch due to occlusion by PACKAGE_NAME

• [ACTION_CLOSE_SYSTEM_DIALOGS](https://developer.android.com/reference/android/content/Intent#ACTION_CLOSE_SYSTEM_DIALOGS) 

  • target >= 31调用抛出安全异常

• target < 31 则系统不会执行 intent 关注日志 Permission Denial android.intent.action.CLOSE_SYSTEM_DIALOGS broadcast from com.package.name requires android.permission.BROADCAST_CLOSE_SYSTEM_DIALOGS

• exclude ： 插桩测试；

target 31 限制

• 后台运行时启动前台服务
• 包含<intent-filter>  必须显示设置android:exported 
• 以不安全的方式启动嵌套 intent

• SameSite