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前台服务类型

从 Android 14（API 级别 34）开始，您必须为每个前台服务声明适当的服务类型。这意味着，您必须在应用清单中声明服务类型，并且除了请求 FOREGROUND_SERVICE 权限之外，还必须为该类型请求适当的前台服务权限。此外，根据前台服务类型，您可能需要在启动服务之前请求运行时权限。

摄像头

要在清单中的 android:foregroundServiceType 下声明的前台服务类型

camera

在清单中声明的权限

FOREGROUND_SERVICE_CAMERA

要传递给 startForeground() 的常量

FOREGROUND_SERVICE_TYPE_CAMERA

运行时前提条件

请求并获得 CAMERA 运行时权限

注意：CAMERA 运行时权限受使用时限制。因此，当您的应用位于后台时，您无法创建 camera 前台服务，但存在一些例外情况。如需了解详情，请参阅有关启动需要运行时权限的前台服务的限制。

说明

继续在后台访问摄像头，例如支持多任务的视频聊天应用。

连接的设备

Foreground service type to declare in manifest under

android:foregroundServiceType

connectedDevice

Permission to declare in your manifest

FOREGROUND_SERVICE_CONNECTED_DEVICE

Constant to pass to startForeground()

FOREGROUND_SERVICE_TYPE_CONNECTED_DEVICE

Runtime prerequisites

At least one of the following conditions must be true:

Declare at least one of the following permissions in your manifest:
Request and be granted at least one of the following runtime permissions:
Call UsbManager.requestPermission()

Description

Interactions with external devices that require a Bluetooth, NFC, IR, USB, or network connection.

Alternatives

If your app needs to do continuous data transfer to an external device, consider using the companion device manager instead. Use the companion device presence API to help your app stay running while the companion device is in range.

If your app needs to scan for bluetooth devices, consider using the Bluetooth scan API instead.

数据同步

Foreground service type to declare in manifest under

android:foregroundServiceType

dataSync

Permission to declare in your manifest

FOREGROUND_SERVICE_DATA_SYNC

Constant to pass to startForeground()

FOREGROUND_SERVICE_TYPE_DATA_SYNC

Runtime prerequisites

None

Description

Data transfer operations, such as the following:

Data upload or download
Backup-and-restore operations
Import or export operations
Fetch data
Local file processing
Transfer data between a device and the cloud over a network

Alternatives

See Alternatives to data sync foreground services for detailed information.

健康

Foreground service type to declare in manifest under

android:foregroundServiceType

health

Permission to declare in your manifest

FOREGROUND_SERVICE_HEALTH

Constant to pass to startForeground()

FOREGROUND_SERVICE_TYPE_HEALTH

Runtime prerequisites

At least one of the following conditions must be true:

Declare the HIGH_SAMPLING_RATE_SENSORS permission in your manifest.
Request and be granted at least one of the following runtime permissions:
- BODY_SENSORS
- ACTIVITY_RECOGNITION

Note: The BODY_SENSORS runtime permission is subject to while-in-use restrictions. For this reason, you cannot create a health foreground service that uses body sensors while your app is in the background, with a few exceptions. For more information, see Restrictions on starting foreground services that need while-in-use permissions.

Description

Any long-running use cases to support apps in the fitness category such as exercise trackers.

位置

要在清单中声明的前台服务类型

android:foregroundServiceType

location

在清单中声明的权限

FOREGROUND_SERVICE_LOCATION

要传递给 startForeground() 的常量

FOREGROUND_SERVICE_TYPE_LOCATION

运行时前提条件

用户必须已启用位置信息服务，并且必须至少向应用授予以下运行时权限之一：

注意：如需检查用户是否已启用位置信息服务以及是否已授予运行时权限的访问权限，请使用 PermissionChecker#checkSelfPermission()

注意：位置信息运行时权限受使用时限制的约束。因此，当应用在后台运行时，您无法创建 location 前台服务，除非您已被授予 ACCESS_BACKGROUND_LOCATION 运行时权限。如需了解详情，请参阅对启动需要在使用时授予权限的前台服务的限制。

说明

需要位置信息使用权的长时间运行的用例，例如导航和位置信息分享。

替代方案

如果您的应用需要在用户到达特定位置时触发，请考虑改用 Geofence API。

媒体

要在其清单中声明的前台服务类型
android:foregroundServiceType: mediaPlayback
在清单中声明的权限: FOREGROUND_SERVICE_MEDIA_PLAYBACK
要传递给 startForeground() 的常量: FOREGROUND_SERVICE_TYPE_MEDIA_PLAYBACK
运行时前提条件: 无
说明: 在后台继续播放音频或视频。在 Android TV 上支持数字视频录制 (DVR) 功能。
替代方案: 如果您显示的是画中画视频，请使用画中画模式。

媒体投影

Foreground service type to declare in manifest under
android:foregroundServiceType: mediaProjection
Permission to declare in your manifest: FOREGROUND_SERVICE_MEDIA_PROJECTION
Constant to pass to startForeground(): FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION
Runtime prerequisites: Call the createScreenCaptureIntent() method before starting the foreground service. Doing so shows a permission notification to the user; the user must grant the permission before you can create the service.; After you have created the foreground service, you can call MediaProjectionManager.getMediaProjection().
Description: Project content to non-primary display or external device using the MediaProjection APIs. This content doesn't have to be exclusively media content.
Alternatives: To stream media to another device, use the Google Cast SDK.

麦克风

要在其清单中声明的前台服务类型

android:foregroundServiceType

microphone

在清单中声明的权限

FOREGROUND_SERVICE_MICROPHONE

要传递给 startForeground() 的常量

FOREGROUND_SERVICE_TYPE_MICROPHONE

运行时前提条件

请求并获得 RECORD_AUDIO 运行时权限。

注意：RECORD_AUDIO 运行时权限受使用时限制。因此，当您的应用位于后台时，您无法创建 microphone 前台服务，但存在一些例外情况。如需了解详情，请参阅有关启动需要运行时权限的前台服务的限制。

说明

在后台继续捕获麦克风内容，例如录音器或通信应用。

致电

要在其清单中声明的前台服务类型

android:foregroundServiceType

phoneCall

在清单中声明的权限

FOREGROUND_SERVICE_PHONE_CALL

要传递给 startForeground() 的常量

FOREGROUND_SERVICE_TYPE_PHONE_CALL

运行时前提条件

必须至少满足以下其中一个条件：

应用已在其清单文件中声明 MANAGE_OWN_CALLS 权限。

应用通过 ROLE_DIALER 角色成为默认拨号器应用。

说明

使用 ConnectionService API 继续当前通话。

替代方案

如果您需要拨打电话、视频或 VoIP 通话，请考虑使用 android.telecom 库。

不妨考虑使用 CallScreeningService 过滤来电。

远程消息传递

Foreground service type to declare in manifest under
android:foregroundServiceType: remoteMessaging
Permission to declare in your manifest: FOREGROUND_SERVICE_REMOTE_MESSAGING
Constant to pass to startForeground(): FOREGROUND_SERVICE_TYPE_REMOTE_MESSAGING
Runtime prerequisites: None
Description: Transfer text messages from one device to another. Assists with continuity of a user's messaging tasks when they switch devices.

短期服务

Foreground service type to declare in manifest under

android:foregroundServiceType

shortService

Permission to declare in your manifest

None

Constant to pass to startForeground()

FOREGROUND_SERVICE_TYPE_SHORT_SERVICE

Runtime prerequisites

None

Description

Quickly finish critical work that cannot be interrupted or postponed.

This type has some unique characteristics:

Can only run for a short period of time (about 3 minutes).
No support for sticky foreground services.
Cannot start other foreground services.
Doesn't require a type-specific permission, though it still requires the FOREGROUND_SERVICE permission.
A shortService can only change to another service type if the app is currently eligible to start a new foreground service.
A foreground service can change its type to shortService at any time, at which point the timeout period begins.

The timeout for shortService begins from the moment that Service.startForeground() is called. The app is expected to call Service.stopSelf() or Service.stopForeground() before the timeout occurs. Otherwise, the new Service.onTimeout() is called, giving apps a brief opportunity to call stopSelf() or stopForeground() to stop their service.

A short time after Service.onTimeout() is called, the app enters a cached state and is no longer considered to be in the foreground, unless the user is actively interacting with the app. A short time after the app is cached and the service has not stopped, the app receives an ANR. The ANR message mentions FOREGROUND_SERVICE_TYPE_SHORT_SERVICE. For these reasons, it's considered best practice to implement the Service.onTimeout() callback.

The Service.onTimeout() callback doesn't exist on Android 13 and lower. If the same service runs on such devices, it doesn't receive a timeout, nor does it ANR. Make sure that your service stops as soon as it finishes the processing task, even if it hasn't received the Service.onTimeout() callback yet.

It's important to note that if the timeout of the shortService is not respected, the app will ANR even if it has other valid foreground services or other app lifecycle processes running.

If an app is visible to the user or satisfies one of the exemptions that allow foreground services to be started from the background, calling Service.StartForeground() again with the FOREGROUND_SERVICE_TYPE_SHORT_SERVICE parameter extends the timeout by another 3 minutes. If the app isn't visible to the user and doesn't satisfy one of the exemptions, any attempt to start another foreground service, regardless of type, causes a ForegroundServiceStartNotAllowedException.

If a user disables battery optimization for your app, it's still affected by the timeout of shortService FGS.

If you start a foreground service that includes the shortService type and another foreground service type, the system ignores the shortService type declaration. However, the service must still adhere to the prerequisites of the other declared types. For more information, see the Foreground services documentation.

特殊用途

Foreground service type to declare in manifest under

android:foregroundServiceType

specialUse

Permission to declare in your manifest

FOREGROUND_SERVICE_SPECIAL_USE

Constant to pass to startForeground()

FOREGROUND_SERVICE_TYPE_SPECIAL_USE

Runtime prerequisites

None

Description

Covers any valid foreground service use cases that aren't covered by the other foreground service types.

In addition to declaring the FOREGROUND_SERVICE_TYPE_SPECIAL_USE foreground service type, developers should declare use cases in the manifest. To do so, they specify the <property> element within the <service> element. These values and corresponding use cases are reviewed when you submit your app in the Google Play Console. The use cases you provide are free-form, and you should make sure to provide enough information to let the reviewer see why you need to use the specialUse type.

<service android:name="fooService" android:foregroundServiceType="specialUse">
  <property android:name="android.app.PROPERTY_SPECIAL_USE_FGS_SUBTYPE"
      android:value="explanation_for_special_use"/>
</service>

系统豁免

要在其清单中声明的前台服务类型

android:foregroundServiceType

systemExempted

在清单中声明的权限

FOREGROUND_SERVICE_SYSTEM_EXEMPTED

要传递给 startForeground() 的常量

FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED

运行时前提条件

无

说明

为系统应用和特定系统集成预留，以便继续使用前台服务。

如需使用此类型，应用必须至少满足以下条件之一：

设备处于演示模式状态
应用是设备所有者
应用是性能分析器所有者
属于具有 ROLE_EMERGENCY 角色的安全应用
属于设备管理应用
具有 SCHEDULE_EXACT_ALARM 或 USE_EXACT_ALARM 权限的应用
VPN 应用（通过设置 > 网络和互联网 > VPN 进行配置）

否则，声明此类型会导致系统抛出 ForegroundServiceTypeNotAllowedException。

使用前台服务类型时强制执行的 Google Play 政策

如果您的应用以 Android 14 或更高版本为目标平台，您需要在 Play 管理中心的应用内容页面（政策 > 应用内容）中声明应用的前台服务类型。如需详细了解如何在 Play 管理中心内声明前台服务类型，请参阅了解前台服务和全屏 intent 要求。