Android Chat App

I need to build an Android app which can send direct messages to a specific number on others social apps (Telegram, Viber, Zalo) I just need a simple interface, most important is I could continue develop the app. I need a solution for issue when I click "send from picture 1, it will automatic send to Telegram/Viber/Zalo as picture 2. (without any click) Source code: android studio (Language = java).