前台服务类型是必需的

使用集合让一切井井有条 根据您的偏好保存内容并对其进行分类。

To help developers be more intentional with defining user-facing foreground services, Android 10 introduced the android:foregroundServiceType attribute within the <service> element.

If your app targets Android 14, it must specify appropriate foreground service types. As in previous versions of Android, multiple types can be combined. This list shows the foreground service types to choose from:

• camera
• connectedDevice
• dataSync
• health
• location
• mediaPlayback
• mediaProjection
• microphone
• phoneCall
• remoteMessaging
• shortService
• specialUse
• systemExempted

If a use case in your app isn't associated with any of these types, we strongly recommend that you migrate your logic to use WorkManager or user-initiated data transfer jobs.

The health, remoteMessaging, shortService, specialUse, and systemExempted types are new in Android 14.

The following code snippet provides an example of a foreground service type declaration in the manifest:

<manifest ...>
  <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
  <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK" />
    <application ...>
      <service
          android:name=".MyMediaPlaybackService"
          android:foregroundServiceType="mediaPlayback"
          android:exported="false">
      </service>
    </application>
</manifest>

If an app that targets Android 14 doesn't define types for a given service in the manifest, then the system will raise MissingForegroundServiceTypeException upon calling startForeground() for that service.

声明新权限来使用前台服务类型

If apps that target Android 14 use a foreground service, they must declare a specific permission, based on the foreground service type, that Android 14 introduces. These permissions appear in the sections labeled "permission that you must declare in your manifest file" in the intended use cases and enforcement for each foreground service type section on this page.

All of the permissions are defined as normal permissions and are granted by default. Users cannot revoke these permissions.

在运行时包含前台服务类型

The best practice for applications starting foreground services is to use the ServiceCompat version of startForeground() (available in androidx-core 1.12 and higher) where you pass in a bitwise integer of foreground service types. You can choose to pass one or more type values.

Usually, you should declare only the types required for a particular use case. This makes it easier to meet the system's expectations for each foreground service type. In cases where a foreground service is started with multiple types, then the foreground service must adhere to the platform enforcement requirements of all types.

ServiceCompat.startForeground(0, notification, FOREGROUND_SERVICE_TYPE_LOCATION)

If the foreground service type is not specified in the call, the type defaults to the values defined in the manifest. If you didn't specify the service type in the manifest, the system throws MissingForegroundServiceTypeException.

If the foreground service needs new permissions after you launch it, you should call startForeground() again and add the new service types. For example, suppose a fitness app runs a running-tracker service that always needs location information, but might or might not need media permissions. You would need to declare both location and mediaPlayback in the manifest. If a user starts a run and just wants their location tracked, your app should call startForeground() and pass just the location service type. Then, if the user wants to start playing audio, call startForeground() again and pass location|mediaPlayback.

系统运行时检查

The system checks for proper use of foreground service types and confirms that the app has requested the proper runtime permissions or uses the required APIs. For instance, the system expects apps that use the foreground service type FOREGROUND_SERVICE_TYPE_LOCATION type to request either ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION.

This implies that apps must follow a very specific order of operations when requesting permissions from the user and starting foreground services. Permissions must be requested and granted before the app attempts to call startForeground(). Apps that request the appropriate permissions after the foreground service has been started must change this order of operations and request the permission before starting the foreground service.

The specifics of platform enforcement appear in the sections labeled "runtime requirements" in the intended use cases and enforcement for each foreground service type section on this page.

每种前台服务类型的预期用例和强制执行

为了使用给定的前台服务类型，您必须在清单文件中声明特定权限，必须满足特定的运行时要求，并且应用必须满足该类型的其中一组预期用例。以下部分介绍了您必须声明的权限、运行时前提条件以及每种类型的预期用例。

相机

Foreground service type to declare in manifest under android:foregroundServiceType

camera

Permission to declare in your manifest

FOREGROUND_SERVICE_CAMERA

Constant to pass to startForeground()

FOREGROUND_SERVICE_TYPE_CAMERA

Runtime prerequisites

Request and be granted the CAMERA runtime permission

Note: The CAMERA runtime permission is subject to while-in-use restrictions. For this reason, you cannot create a camera foreground service 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

Continue to access the camera from the background, such as video chat apps that allow for multitasking.

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:

  • CHANGE_NETWORK_STATE
  • CHANGE_WIFI_STATE
  • CHANGE_WIFI_MULTICAST_STATE
  • NFC
  • TRANSMIT_IR

• Request and be granted at least one of the following runtime permissions:

  • BLUETOOTH_CONNECT
  • BLUETOOTH_ADVERTISE
  • BLUETOOTH_SCAN
  • UWB_RANGING

• 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

要在清单中的以下位置声明的前台服务类型

android:foregroundServiceType

health

在清单中声明的权限

FOREGROUND_SERVICE_HEALTH

要传递给 startForeground() 的常量

FOREGROUND_SERVICE_TYPE_HEALTH

运行时前提条件

必须至少满足以下其中一个条件：

• 在清单中声明 HIGH_SAMPLING_RATE_SENSORS 权限。

• 至少请求并被授予以下其中一项运行时权限：

  • BODY_SENSORS
  • ACTIVITY_RECOGNITION

注意：BODY_SENSORS 运行时权限受使用时限制的约束。因此，除少数例外情况外，您无法在应用在后台运行时创建使用身体传感器的 health 前台服务。如需了解详情，请参阅与启动需要“使用时”权限的前台服务相关的限制。

说明

为健身类别的应用（例如锻炼追踪器）提供支持的所有长时间运行的用例。

位置

Foreground service type to declare in manifest under

android:foregroundServiceType

location

Permission to declare in your manifest

FOREGROUND_SERVICE_LOCATION

Constant to pass to startForeground()

FOREGROUND_SERVICE_TYPE_LOCATION

Runtime prerequisites

The user must have enabled location services and the app must be granted at least one of the following runtime permissions:

• ACCESS_COARSE_LOCATION
• ACCESS_FINE_LOCATION

Note: In order to check that the user has enabled location services as well as granted access to the runtime permissions, use PermissionChecker#checkSelfPermission()

Note: The location runtime permissions are subject to while-in-use restrictions. For this reason, you cannot create a location foreground service while your app is in the background, unless you've been granted the ACCESS_BACKGROUND_LOCATION runtime permission. For more information, see Restrictions on starting foreground services that need while-in-use permissions.

Description

Long-running use cases that require location access, such as navigation and location sharing.

Alternatives

If your app needs to be triggered when the user reaches specific locations, consider using the geofence API instead.

媒体

Foreground service type to declare in manifest under

android:foregroundServiceType

mediaPlayback

Permission to declare in your manifest

FOREGROUND_SERVICE_MEDIA_PLAYBACK

Constant to pass to startForeground()

FOREGROUND_SERVICE_TYPE_MEDIA_PLAYBACK

Runtime prerequisites

None

Description

Continue audio or video playback from the background. Support Digital Video Recording (DVR) functionality on Android TV.

Alternatives

If you're showing picture-in-picture video, use Picture-in-Picture mode.

媒体投影

要在清单中的以下位置声明的前台服务类型

android:foregroundServiceType

mediaProjection

在清单中声明的权限

FOREGROUND_SERVICE_MEDIA_PROJECTION

要传递给 startForeground() 的常量

FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION

运行时前提条件

在启动前台服务之前调用 createScreenCaptureIntent() 方法。这样做会向用户显示权限通知；用户必须先授予权限，您才能创建服务。

创建前台服务后，您可以调用 MediaProjectionManager.getMediaProjection()。

说明

使用 MediaProjection API 将内容投影到非主要显示屏或外部设备。这些内容不必全都为媒体内容。

替代方案

如需将媒体流式传输到其他设备，请使用 Google Cast SDK。

麦克风

Foreground service type to declare in manifest under

android:foregroundServiceType

microphone

Permission to declare in your manifest

FOREGROUND_SERVICE_MICROPHONE

Constant to pass to startForeground()

FOREGROUND_SERVICE_TYPE_MICROPHONE

Runtime prerequisites

Request and be granted the RECORD_AUDIO runtime permission.

Note: The RECORD_AUDIO runtime permission is subject to while-in-use restrictions. For this reason, you cannot create a microphone foreground service 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

Continue microphone capture from the background, such as voice recorders or communication apps.

致电

Foreground service type to declare in manifest under

android:foregroundServiceType

phoneCall

Permission to declare in your manifest

FOREGROUND_SERVICE_PHONE_CALL

Constant to pass to startForeground()

FOREGROUND_SERVICE_TYPE_PHONE_CALL

Runtime prerequisites

At least one of these conditions must be true:

• App has declared the MANAGE_OWN_CALLS permission in its manifest file.

• App is the default dialer app through the ROLE_DIALER role.

Description

Continue an ongoing call using the ConnectionService APIs.

Alternatives

If you need to make phone, video, or VoIP calls, consider using the android.telecom library.

Consider using CallScreeningService to screen calls.

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

要在清单中的以下位置声明的前台服务类型

android:foregroundServiceType

shortService

在清单中声明的权限

无

要传递给 startForeground() 的常量

FOREGROUND_SERVICE_TYPE_SHORT_SERVICE

运行时前提条件

无

说明

快速完成不可中断或推迟的关键工作。

这种类型有一些独特的特征：

• 只能持续运行一小段时间（大约 3 分钟）。
• 不支持粘性前台服务。
• 无法启动其他前台服务。
• 不需要类型专用权限，不过它仍需要 FOREGROUND_SERVICE 权限。
• 只有当应用当前符合启动新前台服务的条件时，shortService 才能更改为其他服务类型。
• 前台服务可以随时将其类型更改为 shortService，届时超时期限将开始。

shortService 的超时时间从调用 Service.startForeground() 开始算起。应用应在发生超时之前调用 Service.stopSelf() 或 Service.stopForeground()。否则，系统会调用新的 Service.onTimeout()，让应用有机会调用 stopSelf() 或 stopForeground() 来停止其服务。

调用 Service.onTimeout() 后的短时间内，应用会进入缓存状态，并且不再被视为处于前台，除非用户正在主动与应用互动。应用缓存一小段时间后，服务还未停止，该应用会收到 ANR 消息。ANR 消息提及 FOREGROUND_SERVICE_TYPE_SHORT_SERVICE。出于这些原因，实现 Service.onTimeout() 回调被视为一种最佳实践。

Android 13 及更低版本中不存在 Service.onTimeout() 回调。如果同一服务在此类设备上运行，则不会出现超时，也不会发生 ANR。确保您的服务在完成处理任务后立即停止，即使它尚未收到 Service.onTimeout() 回调也是如此。

请务必注意，如果未遵循 shortService 的超时设置，即使应用还有其他有效的前台服务或其他应用生命周期进程，应用也会遇到 ANR。

如果应用对用户可见，或满足允许从后台启动前台服务的某一豁免条件，则使用 FOREGROUND_SERVICE_TYPE_SHORT_SERVICE 参数再次调用 Service.StartForeground() 会将超时时间再延长 3 分钟。如果应用对用户不可见且不满足其中一个豁免条件，则尝试启动其他前台服务（无论其类型如何）都会导致 ForegroundServiceStartNotAllowedException。

即使用户为您的应用停用电池优化功能，仍然会受到 shortService FGS 的影响。

如果您启动包含 shortService 类型和另一个前台服务类型的前台服务，系统会忽略 shortService 类型声明。不过，该服务仍必须遵守其他声明类型的先决条件。如需了解详情，请参阅前台服务文档。

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

要在清单中的以下位置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，使其能继续使用前台服务。

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 权限且使用前台服务在后台继续闹钟（包括仅振动闹钟）的应用。

• VPN 应用（使用设置 > 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。