JobIntentService get destroyed , When app is destroyed

Question

As From android developer JobIntentService When running on Android O or later, the work will be dispatched as a job via JobScheduler.enqueue. When running on older versions of the platform, it will use Context.startService.

In my case i am learning JobIntentService and in my case i have a timer that run every one second and display the current date and time but when my app get destroyed the JobIntentService also get destroyed, How can i run it when app is destroyed

JobIntentService

class OreoService : JobIntentService() {

    private val handler = Handler()

    companion object {
        private const val JOB_ID = 123

        fun enqueueWork(cxt: Context, intent: Intent){
            enqueueWork(cxt,OreoService::class.java,JOB_ID,intent)
        }
    }

    override fun onHandleWork(intent: Intent) {

        toast(intent.getStringExtra("val"))

        Timer().scheduleAtFixedRate(object : TimerTask() {
            override fun run() {
                println(Date().toString())
            }

        }, Date(),1000)

    }

    override fun onDestroy() {
        super.onDestroy()
        toast("Service Destroyed")
    }

   private fun toast(msg: String){

       handler.post({
           Toast.makeText(applicationContext,msg,Toast.LENGTH_LONG).show()
       })
   }
}

Manifest

<uses-permission android:name="android.permission.WAKE_LOCK"/>
<application
....... >
<service android:name=".service.OreoService"
            android:permission="android.permission.BIND_JOB_SERVICE"/>
</application>

MainActivity (When button is pressed the service get started)

startServiceBtn.setOnClickListener({
            val intent = Intent()
            intent.putExtra("val","testing service")
            OreoService.enqueueWork(this,intent)
        })

Answer 1

i am learning JobIntentService and in my case i have a timer that run every one second and display the current date and time

That is not a suitable use for JobIntentService (or pretty much anything else, for that matter).

when my app get destroyed the JobIntentService also get destroyed

The point of JobIntentService is to do a little bit of work — some disk I/O, some network I/O, etc. — and then go away. It is not for doing something indefinitely, and it is not suitable for starting asynchronous work, and you are trying to do both. Once onHandleWork() ends, the service goes away, and your process can be terminated at any point in time after that, which will stop your Timer.

How can i run it when app is destroyed

You are welcome to use a foreground Service, not an IntentService or JobIntentService. Return START_STICKY from onStartCommand() to ask Android to restart your service if your process is terminated (e.g., due to low memory conditions). Even that may be terminated by the user, but it is the user's device, not yours, and so the user can do whatever the user wants.