Added in API level 21

JobScheduler

---

Kotlin |Java

abstract class JobScheduler

kotlin.Any
↳	android.app.job.JobScheduler

This is an API for scheduling various types of jobs against the framework that will be executed in your application's own process.

See android.app.job.JobInfo for more description of the types of jobs that can be run and how to construct them. You will construct these JobInfo objects and pass them to the JobScheduler with schedule(android.app.job.JobInfo). When the criteria declared are met, the system will execute this job on your application's android.app.job.JobService. You identify the service component that implements the logic for your job when you construct the JobInfo using android.app.job.JobInfo.Builder#Builder(int,android.content.ComponentName).

The framework will be intelligent about when it executes jobs, and attempt to batch and defer them as much as possible. Typically, if you don't specify a deadline on a job, it can be run at any moment depending on the current state of the JobScheduler's internal queue.

Starting in Android version android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE, JobScheduler may try to optimize job execution by shifting execution to times with more available system resources in order to lower user impact. Factors in system health include sufficient battery, idle, charging, and access to an un-metered network. Jobs will initially be treated as if they have all these requirements, but as their deadlines approach, restrictions will become less strict. Requested requirements will not be affected by this change.

{@see android.app.job.JobInfo.Builder#setRequiresBatteryNotLow(boolean)} {@see android.app.job.JobInfo.Builder#setRequiresDeviceIdle(boolean)} {@see android.app.job.JobInfo.Builder#setRequiresCharging(boolean)} {@see android.app.job.JobInfo.Builder#setRequiredNetworkType(int)}

While a job is running, the system holds a wakelock on behalf of your app. For this reason, you do not need to take any action to guarantee that the device stays awake for the duration of the job.

You do not instantiate this class directly; instead, retrieve it through android.content.Context#getSystemService.

Prior to Android version android.os.Build.VERSION_CODES#S, jobs could only have a maximum of 100 jobs scheduled at a time. Starting with Android version android.os.Build.VERSION_CODES#S, that limit has been increased to 150. Expedited jobs also count towards the limit.

In Android version android.os.Build.VERSION_CODES#LOLLIPOP, jobs had a maximum execution time of one minute. Starting with Android version android.os.Build.VERSION_CODES#M and ending with Android version android.os.Build.VERSION_CODES#R, jobs had a maximum execution time of 10 minutes. Starting from Android version android.os.Build.VERSION_CODES#S, jobs will still be stopped after 10 minutes if the system is busy or needs the resources, but if not, jobs may continue running longer than 10 minutes.

Note: Beginning with API 30 (android.os.Build.VERSION_CODES#R), JobScheduler will throttle runaway applications. Calling schedule(android.app.job.JobInfo) and other such methods with very high frequency can have a high cost and so, to make sure the system doesn't get overwhelmed, JobScheduler will begin to throttle apps, regardless of target SDK version.

Summary

Constants
static Int	PENDING_JOB_REASON_APP The app is in a state that prevents the job from running (eg. the
static Int	PENDING_JOB_REASON_APP_STANDBY The current standby bucket prevents the job from running.
static Int	PENDING_JOB_REASON_BACKGROUND_RESTRICTION The app is restricted from running in the background.
static Int	PENDING_JOB_REASON_CONSTRAINT_BATTERY_NOT_LOW The requested battery-not-low constraint is not satisfied.
static Int	PENDING_JOB_REASON_CONSTRAINT_CHARGING The requested charging constraint is not satisfied.
static Int	PENDING_JOB_REASON_CONSTRAINT_CONNECTIVITY The requested connectivity constraint is not satisfied.
static Int	PENDING_JOB_REASON_CONSTRAINT_CONTENT_TRIGGER The requested content trigger constraint is not satisfied.
static Int	PENDING_JOB_REASON_CONSTRAINT_DEVICE_IDLE The requested idle constraint is not satisfied.
static Int	PENDING_JOB_REASON_CONSTRAINT_MINIMUM_LATENCY The minimum latency has not transpired.
static Int	PENDING_JOB_REASON_CONSTRAINT_PREFETCH The system's estimate of when the app will be launched is far away enough to warrant delaying this job.
static Int	PENDING_JOB_REASON_CONSTRAINT_STORAGE_NOT_LOW The requested storage-not-low constraint is not satisfied.
static Int	PENDING_JOB_REASON_DEVICE_STATE The job is being deferred due to the device state (eg. Doze, battery saver, memory usage, thermal status, etc.).
static Int	PENDING_JOB_REASON_EXECUTING The job is currently running and is therefore not pending.
static Int	PENDING_JOB_REASON_INVALID_JOB_ID The job doesn't exist.
static Int	PENDING_JOB_REASON_JOB_SCHEDULER_OPTIMIZATION JobScheduler thinks it can defer this job to a more optimal running time.
static Int	PENDING_JOB_REASON_QUOTA The app has consumed all of its current quota.
static Int	PENDING_JOB_REASON_UNDEFINED There is no known reason why the job is pending.
static Int	PENDING_JOB_REASON_USER JobScheduler is respecting one of the user's actions (eg. force stop or adb shell commands) to defer this job.
static Int	RESULT_FAILURE Returned from schedule(android.app.job.JobInfo) if a job wasn't scheduled successfully.
static Int	RESULT_SUCCESS Returned from schedule(android.app.job.JobInfo) if this job has been successfully scheduled.

Public constructors
JobScheduler()

Public methods
open Boolean	canRunUserInitiatedJobs() Returns true if the calling app currently holds the android.Manifest.permission#RUN_USER_INITIATED_JOBS permission, allowing it to run user-initiated jobs.
abstract Unit	cancel(jobId: Int) Cancel the specified job.
abstract Unit	cancelAll() Cancel all jobs that have been scheduled in the current namespace by the calling application.
open Unit	cancelInAllNamespaces() Cancel all jobs that have been scheduled by the calling application, regardless of namespace.
abstract Int	enqueue(job: JobInfo, work: JobWorkItem) Similar to schedule, but allows you to enqueue work for a new or existing job.
open JobScheduler	forNamespace(namespace: String) Get a JobScheduler instance that is dedicated to a specific namespace.
abstract MutableList<JobInfo!>	getAllPendingJobs() Retrieve all jobs that have been scheduled by the calling application.
open String?	getNamespace() Get the namespace this JobScheduler instance is operating in.
abstract JobInfo?	getPendingJob(jobId: Int) Look up the description of a scheduled job.
open Int	getPendingJobReason(jobId: Int) Returns a reason why the job is pending and not currently executing.
open MutableMap<String!, MutableList<JobInfo!>!>	getPendingJobsInAllNamespaces() Retrieve all jobs that have been scheduled by the calling application within the current namespace.
abstract Int	schedule(job: JobInfo) Schedule a job to be executed.

Constants

PENDING_JOB_REASON_APP

Added in API level 34

static val PENDING_JOB_REASON_APP: Int

The app is in a state that prevents the job from running (eg. the JobService component is disabled).

Value: 1

PENDING_JOB_REASON_APP_STANDBY

Added in API level 34

static val PENDING_JOB_REASON_APP_STANDBY: Int

The current standby bucket prevents the job from running.

Value: 2

See Also

• android.app.usage.UsageStatsManager#STANDBY_BUCKET_RESTRICTED

PENDING_JOB_REASON_BACKGROUND_RESTRICTION

Added in API level 34

static val PENDING_JOB_REASON_BACKGROUND_RESTRICTION: Int

The app is restricted from running in the background.

Value: 3

See Also

• android.app.ActivityManager#isBackgroundRestricted()
• android.content.pm.PackageManager#isInstantApp()

PENDING_JOB_REASON_CONSTRAINT_BATTERY_NOT_LOW

Added in API level 34

static val PENDING_JOB_REASON_CONSTRAINT_BATTERY_NOT_LOW: Int

The requested battery-not-low constraint is not satisfied.

Value: 4

See Also

• android.app.job.JobInfo.Builder#setRequiresBatteryNotLow(boolean)

PENDING_JOB_REASON_CONSTRAINT_CHARGING

Added in API level 34

static val PENDING_JOB_REASON_CONSTRAINT_CHARGING: Int

The requested charging constraint is not satisfied.

Value: 5

See Also

• android.app.job.JobInfo.Builder#setRequiresCharging(boolean)

PENDING_JOB_REASON_CONSTRAINT_CONNECTIVITY

Added in API level 34

static val PENDING_JOB_REASON_CONSTRAINT_CONNECTIVITY: Int

The requested connectivity constraint is not satisfied.

Value: 6

See Also

• android.app.job.JobInfo.Builder#setRequiredNetwork(NetworkRequest)
• android.app.job.JobInfo.Builder#setRequiredNetworkType(int)

PENDING_JOB_REASON_CONSTRAINT_CONTENT_TRIGGER

Added in API level 34

static val PENDING_JOB_REASON_CONSTRAINT_CONTENT_TRIGGER: Int

The requested content trigger constraint is not satisfied.

Value: 7

See Also

• android.app.job.JobInfo.Builder#addTriggerContentUri(JobInfo.TriggerContentUri)

PENDING_JOB_REASON_CONSTRAINT_DEVICE_IDLE

Added in API level 34

static val PENDING_JOB_REASON_CONSTRAINT_DEVICE_IDLE: Int

The requested idle constraint is not satisfied.

Value: 8

See Also

• android.app.job.JobInfo.Builder#setRequiresDeviceIdle(boolean)

PENDING_JOB_REASON_CONSTRAINT_MINIMUM_LATENCY

Added in API level 34

static val PENDING_JOB_REASON_CONSTRAINT_MINIMUM_LATENCY: Int

The minimum latency has not transpired.

Value: 9

See Also

• android.app.job.JobInfo.Builder#setMinimumLatency(long)

PENDING_JOB_REASON_CONSTRAINT_PREFETCH

Added in API level 34

static val PENDING_JOB_REASON_CONSTRAINT_PREFETCH: Int

The system's estimate of when the app will be launched is far away enough to warrant delaying this job.

Value: 10

See Also

• android.app.job.JobInfo#isPrefetch()
• android.app.job.JobInfo.Builder#setPrefetch(boolean)

PENDING_JOB_REASON_CONSTRAINT_STORAGE_NOT_LOW

Added in API level 34

static val PENDING_JOB_REASON_CONSTRAINT_STORAGE_NOT_LOW: Int

The requested storage-not-low constraint is not satisfied.

Value: 11

See Also

• android.app.job.JobInfo.Builder#setRequiresStorageNotLow(boolean)

PENDING_JOB_REASON_DEVICE_STATE

Added in API level 34

static val PENDING_JOB_REASON_DEVICE_STATE: Int

The job is being deferred due to the device state (eg. Doze, battery saver, memory usage, thermal status, etc.).

Value: 12

PENDING_JOB_REASON_EXECUTING

Added in API level 34

static val PENDING_JOB_REASON_EXECUTING: Int

The job is currently running and is therefore not pending.

Value: -1

PENDING_JOB_REASON_INVALID_JOB_ID

Added in API level 34

static val PENDING_JOB_REASON_INVALID_JOB_ID: Int

The job doesn't exist.

Value: -2

PENDING_JOB_REASON_JOB_SCHEDULER_OPTIMIZATION

Added in API level 34

static val PENDING_JOB_REASON_JOB_SCHEDULER_OPTIMIZATION: Int

JobScheduler thinks it can defer this job to a more optimal running time.

Value: 13

PENDING_JOB_REASON_QUOTA

Added in API level 34

static val PENDING_JOB_REASON_QUOTA: Int

The app has consumed all of its current quota.

Value: 14

See Also

• android.app.usage.UsageStatsManager#getAppStandbyBucket()
• android.app.job.JobParameters#STOP_REASON_QUOTA

PENDING_JOB_REASON_UNDEFINED

Added in API level 34

static val PENDING_JOB_REASON_UNDEFINED: Int

There is no known reason why the job is pending. If additional reasons are added on newer Android versions, the system may return this reason to apps whose target SDK is not high enough to expect that reason.

Value: 0

PENDING_JOB_REASON_USER

Added in API level 34

static val PENDING_JOB_REASON_USER: Int

JobScheduler is respecting one of the user's actions (eg. force stop or adb shell commands) to defer this job.

Value: 15

RESULT_FAILURE

Added in API level 21

static val RESULT_FAILURE: Int

Returned from schedule(android.app.job.JobInfo) if a job wasn't scheduled successfully. Scheduling can fail for a variety of reasons, including, but not limited to:

• an invalid parameter was supplied (eg. the run-time for your job is too short, or the system can't resolve the requisite JobService in your package)
• the app has too many jobs scheduled
• the app has tried to schedule too many jobs in a short amount of time

Attempting to schedule the job again immediately after receiving this result will not guarantee a successful schedule.

Value: 0

RESULT_SUCCESS

Added in API level 21

static val RESULT_SUCCESS: Int

Returned from schedule(android.app.job.JobInfo) if this job has been successfully scheduled.

Value: 1

Public constructors

JobScheduler

JobScheduler()

Public methods

canRunUserInitiatedJobs

Added in API level 34

open fun canRunUserInitiatedJobs(): Boolean

Returns true if the calling app currently holds the android.Manifest.permission#RUN_USER_INITIATED_JOBS permission, allowing it to run user-initiated jobs.

cancel

Added in API level 21

abstract fun cancel(jobId: Int): Unit

Cancel the specified job. If the job is currently executing, it is stopped immediately and the return value from its JobService#onStopJob(JobParameters) method is ignored.

Parameters
jobId	Int: unique identifier for the job to be canceled, as supplied to JobInfo.Builder(int, android.content.ComponentName).

cancelAll

Added in API level 21

abstract fun cancelAll(): Unit

Cancel all jobs that have been scheduled in the current namespace by the calling application.

Starting with Android version android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE, this will only cancel within the current namespace. If a namespace hasn't been explicitly set with forNamespace(java.lang.String), then this will cancel jobs in the default namespace. To cancel all jobs scheduled by the application, use cancelInAllNamespaces() instead.

cancelInAllNamespaces

Added in API level 34

open fun cancelInAllNamespaces(): Unit

Cancel all jobs that have been scheduled by the calling application, regardless of namespace.

enqueue

Added in API level 26

abstract fun enqueue(
    job: JobInfo, 
    work: JobWorkItem
): Int

Similar to schedule, but allows you to enqueue work for a new or existing job. If a job with the same ID is already scheduled, it will be replaced with the new JobInfo, but any previously enqueued work will remain and be dispatched the next time it runs. If a job with the same ID is already running, the new work will be enqueued for it without stopping the job.

The work you enqueue is later retrieved through JobParameters.dequeueWork. Be sure to see there about how to process work; the act of enqueueing work changes how you should handle the overall lifecycle of an executing job.

It is strongly encouraged that you use the same JobInfo for all work you enqueue. This will allow the system to optimally schedule work along with any pending and/or currently running work. If the JobInfo changes from the last time the job was enqueued, the system will need to update the associated JobInfo, which can cause a disruption in execution. In particular, this can result in any currently running job that is processing previous work to be stopped and restarted with the new JobInfo.

It is recommended that you avoid using JobInfo.Builder#setExtras(PersistableBundle) or JobInfo.Builder#setTransientExtras(Bundle) with a JobInfo you are using to enqueue work. The system will try to compare these extras with the previous JobInfo, but there are situations where it may get this wrong and count the JobInfo as changing. (That said, you should be relatively safe with a simple set of consistent data in these fields.) You should never use JobInfo.Builder#setClipData(ClipData, int) with work you are enqueuing, since currently this will always be treated as a different JobInfo, even if the ClipData contents are exactly the same.

Note: Scheduling a job can have a high cost, even if it's rescheduling the same job and the job didn't execute, especially on platform versions before version android.os.Build.VERSION_CODES#Q. As such, the system may throttle calls to this API if calls are made too frequently in a short amount of time.

Note: Prior to Android version android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE, JobWorkItems could not be persisted. Apps were not allowed to enqueue JobWorkItems with persisted jobs and the system would throw an IllegalArgumentException if they attempted to do so. Starting with android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE, JobWorkItems can be persisted alongside the hosting job. However, Intents cannot be persisted. Set a PersistableBundle using JobWorkItem.Builder#setExtras(PersistableBundle) for any information that needs to be persisted.

Note: The JobService component needs to be enabled in order to successfully schedule a job.

Parameters
job	JobInfo: The job you wish to enqueue work for. See JobInfo.Builder for more detail on the sorts of jobs you can schedule. This value cannot be null.
work	JobWorkItem: New work to enqueue. This will be available later when the job starts running. This value cannot be null.

Return
Int	the result of the enqueue request. Value is android.app.job.JobScheduler#RESULT_FAILURE, or android.app.job.JobScheduler#RESULT_SUCCESS

Exceptions
java.lang.IllegalArgumentException	if the specified JobService doesn't exist or is disabled.

forNamespace

Added in API level 34

open fun forNamespace(namespace: String): JobScheduler

Get a JobScheduler instance that is dedicated to a specific namespace. Any API calls using this instance will interact with jobs in that namespace, unless the API documentation says otherwise. Attempting to update a job scheduled in another namespace will not be possible but will instead create or update the job inside the current namespace. A JobScheduler instance dedicated to a namespace must be used to schedule or update jobs in that namespace.

Since leading and trailing whitespace can lead to hard-to-debug issues, they will be trimmed. An empty String (after trimming) is not allowed.

Parameters
namespace	String: This value cannot be null.

Return
JobScheduler	This value cannot be null.

See Also

• #getNamespace()

getAllPendingJobs

Added in API level 21

abstract fun getAllPendingJobs(): MutableList<JobInfo!>

Retrieve all jobs that have been scheduled by the calling application.

Return
MutableList<JobInfo!>	a list of all of the app's scheduled jobs. This includes jobs that are currently started as well as those that are still waiting to run. This value cannot be null.

getNamespace

Added in API level 34

open fun getNamespace(): String?

Get the namespace this JobScheduler instance is operating in. A null value means that the app has not specified a namespace for this instance, and it is therefore using the default namespace.

getPendingJob

Added in API level 24

abstract fun getPendingJob(jobId: Int): JobInfo?

Look up the description of a scheduled job.

Return
JobInfo?	The JobInfo description of the given scheduled job, or null if the supplied job ID does not correspond to any job.

getPendingJobReason

Added in API level 34

open fun getPendingJobReason(jobId: Int): Int

Returns a reason why the job is pending and not currently executing. If there are multiple reasons why a job may be pending, this will only return one of them.

Return

Int

Value is android.app.job.JobScheduler#PENDING_JOB_REASON_UNDEFINED, android.app.job.JobScheduler#PENDING_JOB_REASON_APP, android.app.job.JobScheduler#PENDING_JOB_REASON_APP_STANDBY, android.app.job.JobScheduler#PENDING_JOB_REASON_BACKGROUND_RESTRICTION, android.app.job.JobScheduler#PENDING_JOB_REASON_CONSTRAINT_BATTERY_NOT_LOW, android.app.job.JobScheduler#PENDING_JOB_REASON_CONSTRAINT_CHARGING, android.app.job.JobScheduler#PENDING_JOB_REASON_CONSTRAINT_CONNECTIVITY, android.app.job.JobScheduler#PENDING_JOB_REASON_CONSTRAINT_CONTENT_TRIGGER, android.app.job.JobScheduler#PENDING_JOB_REASON_CONSTRAINT_DEVICE_IDLE, android.app.job.JobScheduler#PENDING_JOB_REASON_CONSTRAINT_MINIMUM_LATENCY, android.app.job.JobScheduler#PENDING_JOB_REASON_CONSTRAINT_PREFETCH, android.app.job.JobScheduler#PENDING_JOB_REASON_CONSTRAINT_STORAGE_NOT_LOW, android.app.job.JobScheduler#PENDING_JOB_REASON_DEVICE_STATE, android.app.job.JobScheduler#PENDING_JOB_REASON_EXECUTING, android.app.job.JobScheduler#PENDING_JOB_REASON_INVALID_JOB_ID, android.app.job.JobScheduler#PENDING_JOB_REASON_JOB_SCHEDULER_OPTIMIZATION, android.app.job.JobScheduler#PENDING_JOB_REASON_QUOTA, or android.app.job.JobScheduler#PENDING_JOB_REASON_USER

getPendingJobsInAllNamespaces

Added in API level 34

open fun getPendingJobsInAllNamespaces(): MutableMap<String!, MutableList<JobInfo!>!>

Retrieve all jobs that have been scheduled by the calling application within the current namespace.

Return
MutableMap<String!, MutableList<JobInfo!>!>	a list of all of the app's scheduled jobs scheduled with the current namespace. If a namespace hasn't been explicitly set with forNamespace(java.lang.String), then this will return jobs in the default namespace. This includes jobs that are currently started as well as those that are still waiting to run. This value cannot be null.

schedule

Added in API level 21

abstract fun schedule(job: JobInfo): Int

Schedule a job to be executed. Will replace any currently scheduled job with the same ID with the new information in the JobInfo. If a job with the given ID is currently running, it will be stopped.

Note: Scheduling a job can have a high cost, even if it's rescheduling the same job and the job didn't execute, especially on platform versions before version android.os.Build.VERSION_CODES#Q. As such, the system may throttle calls to this API if calls are made too frequently in a short amount of time.

Note: The JobService component needs to be enabled in order to successfully schedule a job.

Parameters
job	JobInfo: The job you wish scheduled. See JobInfo.Builder for more detail on the sorts of jobs you can schedule. This value cannot be null.

Return
Int	the result of the schedule request. Value is android.app.job.JobScheduler#RESULT_FAILURE, or android.app.job.JobScheduler#RESULT_SUCCESS

Exceptions
java.lang.IllegalArgumentException	if the specified JobService doesn't exist or is disabled.