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I have problem with nativescript background service. I want to write application with background service. The service must be always run in background, even when the application will be stoped and closed.

I have used nativescript-android-utils for android intent services, but the service stops working after application closes. I have also tried to register broadcast receiver according to this but the result is same:
when app is closed, the service also stops working.

I want to write gps tracker background service and that's why I need to be the service always running in background.

Service code:

declare var com: any;
@JavaProxy("org.nativescript.PresleyApp.Test")
export class Test extends com.pip3r4o.android.app.IntentService 
 protected onHandleIntent(intent: android.content.Intent): void 
 geolocation.enableLocationRequest().then(function() 
 this.watchId = geolocation.watchLocation(
 (loc) => 
 if (loc) 
 const toast = Toast.makeText("Background Location: " + loc.latitude + " " + loc.longitude);
 toast.show();
 console.log("Background Location: " + loc.latitude + " " + loc.longitude);
 
 ,
 (e) => e));
 ,
 
 desiredAccuracy: Accuracy.high,
 updateDistance: 0.1,
 updateTime: 3000,
 minimumUpdateTime: 100
 );
 , (e) => e));
 );
 

Starting service with

const context = application.android.context;
const intent = new android.content.Intent();
intent.setClassName(context, "org.nativescript.PresleyApp.Test");
context.startService(intent);

So here is how I did my service,

 import * as timer from "timer";

 @JavaProxy("com.nativescript.DataSyncService")
 class DataSyncService extends android.app.Service 

 private timerId: number;

 onBind(): android.os.IBinder 
 return null;
 

 onCreate(): void 
 super.onCreate();

 if (!this.timerId) 
 this.timerId = timer.setInterval(()=> 
 // Run this every 4 hrs
 , (1000 * 60 * 60 * 4));
 
 

 onStartCommand(intent: android.content.Intent, flags: number, startId: number): number 
 return android.app.Service.START_STICKY;
 

 onDestroy(): void 
 super.onDestroy();
 timer.clearInterval(this.timerId);
 
 

Returning START_STICKY from onStartCommand makes the system to restart the service when the process (app) is killed.