How to start foreground service using notificstion

  How to start foreground notification ..

if your android version>=o then you have crate notification channel  the best way to start create notification channel inside the App class

public class App extends Application {
    public static final String channe_id="Location";
    public static final String channel_id2="Backgroundlocation";

    @Override
    public void onCreate() {
        super.onCreate();
      SetChannelId(channe_id,"Location");
      SetChannelId(channel_id2,"Background Location");

    }

    private void SetChannelId(String channleId,String channelName)
    {
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            NotificationChannel channel = new
                    NotificationChannel(channleId, channelName, NotificationManager.IMPORTANCE_HIGH);
            channel.setLockscreenVisibility(1);
            channel.setLightColor(getColor(R.color.purple_700));

            NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
            manager.createNotificationChannel(channel);
        }
    }
}

  in this example we are start the foreground service by using service class

public class Myservice extends Service {
    private  static  int i=0;
    private FusedLocationProviderClient mProviderClient;
    private LocationRequest mLocationRequest;
    private String longmessage="for ground service gg hjhg jhdj hdgf hdgfjd duygfd\" +\n" +
                           "djfhjdgf fguf hkj kmio uijuiiiiiiiiiii iuuuuuuuuu hhhhhhhhhhh\" +\n" +
                            "kokikkkkkkkkkkkkkkkkkkkkkkkkk ";
    private LocationCallback mLocationCallback = new LocationCallback() {
        @Override
        public void onLocationResult(@NonNull LocationResult locationResult) {
            super.onLocationResult(locationResult);
            Location location = locationResult.getLastLocation();

            setDataToserver(location);

        }
    };

    private void setDataToserver(Location location) {
        if (location != null) {
            Log.d("service", "location :"+i + location.getLatitude());
            i++;
          /*  Toast.makeText(getApplicationContext(), "location update " + location.getLatitude()
                    , Toast.LENGTH_SHORT).show();*/
        } else {
           /* Toast.makeText(getApplicationContext(), "not location update", Toast.LENGTH_SHORT).show();
            Log.d("service", "location :not update");*/

        }
    }

    @Override
    public void onCreate() {
        super.onCreate();
        mProviderClient = LocationServices.getFusedLocationProviderClient(this);
        mLocationRequest = LocationRequest.create();
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        mLocationRequest.setInterval(5 * 1000);
        mLocationRequest.setFastestInterval(10 * 800);

    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        startForeground(9,getNotification());
        getUpdateLocation();
        return START_STICKY;
    }

    private Notification getNotification() {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this,
                App.channe_id);
        builder.setPriority(NotificationManager.IMPORTANCE_HIGH);
        builder.setContentTitle("Location running");
        builder.setContentText(longmessage);
        builder.setSubText("i am sub text");
        builder.setSmallIcon(R.mipmap.ic_launcher_round);
        builder.setStyle(new NotificationCompat.BigTextStyle().bigText("i am big text "+longmessage));
      /*  builder.setStyle(new NotificationCompat.InboxStyle().addLine("i am long1"+longmessage)
        .addLine("i ma long2"+longmessage)
        .setBigContentTitle("title"+longmessage)
        .setSummaryText("coding@gmail.com"))
        .setGroupSummary(true);*/

            builder.setAutoCancel(false);



        return builder.build();
    }

    private void getUpdateLocation() {

        if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            stopForeground(true);
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }
        HandlerThread handlerThread =new HandlerThread("Myhandler");
        handlerThread.start();

        mProviderClient.requestLocationUpdates(mLocationRequest, mLocationCallback, Looper.getMainLooper());

    }

    @Override
    public void onTaskRemoved(Intent rootIntent) {
        Intent restartServiceTask=new Intent(getApplicationContext(),this.getClass());
        restartServiceTask.setPackage(getPackageName());
        PendingIntent pendingIntent=PendingIntent.getService(this,3,restartServiceTask,
                PendingIntent.FLAG_ONE_SHOT);
        AlarmManager alarmManager=(AlarmManager)getApplicationContext().getSystemService(Context.ALARM_SERVICE);
        alarmManager.set(
                AlarmManager.ELAPSED_REALTIME,
                SystemClock.elapsedRealtime()+1000
                ,pendingIntent
        );
        startService(new Intent(this,Myservice.class));
        Log.d("service","OnTaskRemoved");

        super.onTaskRemoved(rootIntent);

    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }



    @Override
    public void onDestroy() {

       // Toast.makeText(getApplicationContext(), "service destory", Toast.LENGTH_SHORT).show();
        if(mLocationCallback!=null)
        {
            Log.d("service","serivce destory:");

            mProviderClient.removeLocationUpdates(mLocationCallback);

        }
        Log.d("service","serivce destory2:");

        super.onDestroy();
    }

start the forground service  in MainActivity or U can stasrt from any activity as  ur wish

mBinding.startservice.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent intent=new Intent(MainActivity.this,Myservice.class);
        Toast.makeText(getApplicationContext(), "service start", Toast.LENGTH_SHORT).show();
        //this comment code is alos write
        /*if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            startForegroundService(intent);
        }else
        {
            startService(intent);
        }*/
     //   startService(intent);
       ContextCompat.startForegroundService(getApplicationContext(),intent);
        //startService(intent);
    }

});}