Loại dịch vụ trên nền trước

Kể từ Android 14 (API cấp 34), bạn phải khai báo một loại dịch vụ phù hợp cho mỗi dịch vụ trên nền trước. Tức là bạn phải khai báo loại dịch vụ trong tệp kê khai ứng dụng, đồng thời yêu cầu quyền dịch vụ trên nền trước phù hợp cho loại dịch vụ đó (ngoài việc yêu cầu quyền FOREGROUND_SERVICE). Ngoài ra, tuỳ thuộc vào loại dịch vụ trên nền trước, bạn có thể phải yêu cầu quyền trong thời gian chạy trước khi chạy dịch vụ.

Camera

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

Description

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

Thiết bị đã kết nối

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:

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.

Đồng bộ hoá dữ liệu

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.

Sức khoẻ

Loại dịch vụ trên nền trước cần khai báo trong tệp kê khai theo
android:foregroundServiceType
health
Quyền khai báo trong tệp kê khai
FOREGROUND_SERVICE_HEALTH
Hằng số để truyền đến startForeground()
FOREGROUND_SERVICE_TYPE_HEALTH
Điều kiện tiên quyết về thời gian chạy

Ít nhất một trong các điều kiện sau phải đúng:

Mô tả

Trường hợp sử dụng lâu dài bất kỳ để hỗ trợ các ứng dụng trong danh mục thể dục (ví dụ: trình theo dõi bài tập thể dục).

Vị trí

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:

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.

Nội dung nghe nhìn

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.

Xử lý phương tiện

Foreground service type to declare in manifest under
android:foregroundServiceType
mediaProcessing
Permission to declare in your manifest
FOREGROUND_SERVICE_MEDIA_PROCESSING
Constant to pass to startForeground()
FOREGROUND_SERVICE_TYPE_MEDIA_PROCESSING
Runtime prerequisites
None
Description

Service for performing time-consuming operations on media assets, like converting media to different formats. The system allows this service a limited time to run; under normal circumstances, this time limit would be 6 hours out of every 24. (This limit is shared by all of an app's mediaProcessing foreground services.)

Your app should manually stop the media processing service in the following scenario:

If the timeout period is reached, the system calls the service's Service.onTimeout(int, int) method. At this time, the service has a few seconds to call Service.stopSelf(). If the service does not call Service.stopSelf(), an ANR will occur with this error message: "A foreground service of <fgs_type> did not stop within its timeout: <component_name>".

Note: Service.onTimeout(int, int) is not available on Android 14 or lower. On devices running those versions, if a media processing service reaches the timeout period, the system immediately caches the app. For this reason, your app shouldn't wait to get a timeout notification. Instead, it should terminate the foreground service or change it to a background service as soon as appropriate.

Chiếu nội dung nghe nhìn

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.

Micrô

Loại dịch vụ trên nền trước cần khai báo trong tệp kê khai theo
android:foregroundServiceType
microphone
Quyền khai báo trong tệp kê khai
FOREGROUND_SERVICE_MICROPHONE
Hằng số để truyền đến startForeground()
FOREGROUND_SERVICE_TYPE_MICROPHONE
Điều kiện tiên quyết về thời gian chạy

Yêu cầu và được cấp quyền khi bắt đầu chạy RECORD_AUDIO.

Mô tả

Tiếp tục ghi âm qua micrô ở chế độ nền, chẳng hạn như trình ghi âm giọng nói hoặc ứng dụng giao tiếp.

Cuộc gọi điện thoại

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 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.

Nhắn tin từ xa

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.

Dịch vụ ngắn

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.

Cách sử dụng đặc biệt

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>

Được miễn trừ hệ thống

Foreground service type to declare in manifest under
android:foregroundServiceType
systemExempted
Permission to declare in your manifest
FOREGROUND_SERVICE_SYSTEM_EXEMPTED
Constant to pass to startForeground()
FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED
Runtime prerequisites
None
Description

Reserved for system applications and specific system integrations, to continue to use foreground services.

To use this type, an app must meet at least one of the following criteria:

Phương thức thực thi chính sách của Google Play đối với việc sử dụng các loại dịch vụ trên nền trước

Nếu ứng dụng của bạn nhắm đến Android 14 trở lên, bạn cần khai báo các loại dịch vụ trên nền trước của ứng dụng trên trang nội dung ứng dụng của Play Console (Chính sách > Nội dung ứng dụng). Để biết thêm thông tin về cách khai báo các loại dịch vụ trên nền trước trong Play Console, hãy xem bài viết Tìm hiểu các yêu cầu khi sử dụng ý định truy cập chế độ toàn màn hình và dịch vụ trên nền trước.