https://www.c-sharpcorner.com/article/understand-intentservice-in-xamarin-with-visual-studio-2015/ you can refer to this link.
– Lucas ZhangOct 01 '18 at 00:41
This question may be useful https://stackoverflow.com/questions/8964031/using-startforeground-with-an-intent-service
– RodneyJan 06 '19 at 15:09