Telegram Bot API is very famous today. The API can be integrated with many languages. The following link demonstrates about the wrapper library to integrate Telegram Bot API with Android and how to implement this in Android Application.

 

https://github.com/AJTechsoft/TelegramBotAPI/blob/master/Documentation.Android.md 

 

Sample: 

 

 

If you like this library star it in github and do share this library.