how to pass data from activity to running service

Question

I want to send data to the server periodically, I\'m using background Service for that, but I want to send when the data got updated, and updated data I\'m getting

Answer 1

1.Sending data to service Upto Lolipop edition

Intent serviceIntent= new Intent(DriverActivity.this,demoService.class);
serviceIntent.putExtra("token", token);
startService(serviceIntent);

2. Retrieving data in Service class :

    @Override
   public int onStartCommand(Intent intent, int flags, int startId)
   {
   Toast.makeText(this, "Starting..", Toast.LENGTH_SHORT).show();
   Log.d(APP_TAG,intent.getStringExtra("token"));
   return "your flag";
   }