Calling startService will throw an IllegalStateException exception.

Calling startService will throw an IllegalStateException exception

startServiceIt can easily start aserviceServices can also run in separate processes.

But if it is called in the backgroundstartService, then it is likely to throw a crash.

Caused by: : Not allowed to start service Intent { cmp=/.MyService }: app is in background uid UidRecord{b67c471 u0a86 RCVR idle change:uncached procs:1 seq(0,0,0)}
        at (:1577)
        at (:1532)
        at (:664)
        at (:664)
        at $(:1661) 
        at (:106) 
        at (:193) 
        at (:6669) 
        at (Native Method) 
        at $(:493) 
        at (:858) 

Cause of error

Android8.0After that, the system added the backgroundServiceThe limitation of the application is in the background, callstartServiceWill throwIllegalStateException。

It means that in the background, calls are not allowedstartServiceStart a background service, otherwise an exception will be thrown.

Solution

1. Use startForegroundService

The usage method is relatively simple, so I won't list the code here.

There are a few points to note:

• Use this method to start the foreground service and it will be displayed on the user's notification bar
• Must be in5sCalling service withinstartForegroundMethod, otherwise it will happenANR

2. Use JobScheduler

Use JobScheduler to run tasks in the background.

Define a JobService:

public class MyJobService extends JobService {
    @Override
    public boolean onStartJob(JobParameters params) {
        return false;
    }
    @Override
    public boolean onStopJob(JobParameters params) {
        return false;
    }
}

onStartJob：

• Running in the main process requires avoiding time-consuming operations.
• Return true: means that the task is still executing
• Return false: means that the task has been executed
• After execution, you can call the jobFinished method to notify the system that the task has been completed.

onStopJob:

• When the conditions are not met, the callback will be made
• Return true: indicates that the task is executed again when the condition is met.
• Return false: means that the task has completely ended

registerJobService：

        <service
            android:name=".MyJobService"
            android:permission=".BIND_JOB_SERVICE" />

Define aJobInfo：

 builder = new (111, new ComponentName(this, ));
// todo Set the parameters of the task

Publish tasks to the system:

JobScheduler jobScheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);
(());

3. Use WorkManager

WorkManageryesJobSchedulerThe upgraded version of the program and supports multiple processes, allowing tasks to be run into separate processes. For specific usage methods, please refer to the previous article:After the application exits, continue to run background tasks, and try WorkManager!

Summarize

Android 8.0Above version, call in the backgroundstartServiceWill throwIllegalStateExceptionException needs to be used in other ways instead.

There are three common methods:

• startForegroundService: This way will display the UI in the user's notification bar.
• JobScheduler: Can realize backend operation tasks without perception.
• WorkManager：JetpackThe library inJobSchedulerUpgraded version, supports multiple processes.

The above is the detailed content of solving the problem of calling startService that will throw an IllegalStateException. For more information about startService IllegalStateException, please follow my other related articles!