Tipi di servizi in primo piano

A partire da Android 14 (livello API 34), devi dichiarare una per ogni servizio in primo piano. Ciò significa che devi dichiarare tipo di servizio nel file manifest dell'app e richiedi anche il primo piano appropriato autorizzazione del servizio per quel tipo (oltre a richiedere il FOREGROUND_SERVICE autorizzazione). Inoltre, a seconda del tipo di servizio in primo piano, è possibile devi richiedere le autorizzazioni di runtime prima di avviare il servizio.

Fotocamera

Tipo di servizio in primo piano da dichiarare nel manifest in android:foregroundServiceType
camera
Autorizzazione da dichiarare nel file manifest
FOREGROUND_SERVICE_CAMERA
Costante da passare a startForeground()
FOREGROUND_SERVICE_TYPE_CAMERA
Prerequisiti di runtime

Richiedere e ottenere l'autorizzazione di runtime CAMERA

Descrizione

Continuare ad accedere alla fotocamera in background, ad esempio le app di video chat che consentono il multitasking.

Dispositivo connesso

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.

Sincronizzazione dati

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.

Salute

Tipo di servizio in primo piano da dichiarare nel manifest in
android:foregroundServiceType
health
Autorizzazione da dichiarare nel file manifest
FOREGROUND_SERVICE_HEALTH
Costante da passare a startForeground()
FOREGROUND_SERVICE_TYPE_HEALTH
Prerequisiti di runtime

Deve essere vera almeno una delle seguenti condizioni:

Descrizione

Eventuali casi d'uso di lunga durata per supportare le app nella categoria fitness, ad esempio gli activity tracker.

Posizione

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.

Contenuti multimediali

Tipo di servizio in primo piano da dichiarare nel file manifest in
android:foregroundServiceType
mediaPlayback
Autorizzazione da dichiarare nel file manifest
FOREGROUND_SERVICE_MEDIA_PLAYBACK
Costante da passare a startForeground()
FOREGROUND_SERVICE_TYPE_MEDIA_PLAYBACK
Prerequisiti di runtime
Nessuna
Descrizione

Continua la riproduzione audio o video in background. Video digitale di assistenza Funzionalità di registrazione (DVR) su Android TV.

Alternative

Se visualizzi video Picture in picture, usa Modalità Picture in picture.

Elaborazione contenuti multimediali in corso

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.

Proiezione di contenuti multimediali

Tipo di servizio in primo piano da dichiarare nel manifest in
android:foregroundServiceType
mediaProjection
Autorizzazione da dichiarare nel file manifest
FOREGROUND_SERVICE_MEDIA_PROJECTION
Costante da passare a startForeground()
FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION
Prerequisiti di runtime

Chiama il metodo createScreenCaptureIntent() prima di avviare il servizio in primo piano. In questo modo viene mostrata una notifica di autorizzazione all'utente, che deve concedere l'autorizzazione prima che tu possa creare il servizio.

Dopo aver creato il servizio in primo piano, puoi chiamare MediaProjectionManager.getMediaProjection().

Descrizione

Proietta i contenuti su un display non principale o su un dispositivo esterno utilizzando API di MediaProjection. Questi contenuti non devono essere esclusivamente multimediali contenuti.

Alternative

Per trasmettere contenuti multimediali a un altro dispositivo, utilizza l'SDK Google Cast.

Microfono

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.

Description

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

Telefonata

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.

Messaggistica remota

Tipo di servizio in primo piano da dichiarare nel file manifest in
android:foregroundServiceType
remoteMessaging
Autorizzazione da dichiarare nel manifest
FOREGROUND_SERVICE_REMOTE_MESSAGING
Costante per passare a startForeground()
FOREGROUND_SERVICE_TYPE_REMOTE_MESSAGING
Prerequisiti di runtime
Nessuno
Descrizione
Trasferisci messaggi da un dispositivo a un altro. Agevola la continuità delle attività di messaggistica di un utente quando cambia dispositivo.

Servizio di Short

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.

Uso speciale

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>

Esenzione dal sistema

Tipo di servizio in primo piano da dichiarare nel file manifest in
android:foregroundServiceType
systemExempted
Autorizzazione da dichiarare nel manifest
FOREGROUND_SERVICE_SYSTEM_EXEMPTED
Costante per passare a startForeground()
FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED
Prerequisiti di runtime
Nessuno
Descrizione

Riservato per applicazioni di sistema e integrazioni di sistema specifiche, per continuare a utilizzare i servizi in primo piano.

Per utilizzare questo tipo, un'app deve soddisfare almeno uno dei seguenti criteri:

Applicazione delle norme di Google Play per l'utilizzo dei tipi di servizi in primo piano

If your app targets Android 14 or higher, you'll need to declare your app's foreground service types in the Play Console's app content page (Policy > App content). For more information on how to declare your foreground service types in Play Console, see Understanding foreground service and full-screen intent requirements.