Can I connect Bangle.js to my Android Studio app?

Hi,
I'm currently coding an application on Android Studio and I would like it to send notifications to my Bangle.js.

I considered using Gadgetbridge but:

1. It doesn't send the notifications that come from my app
   
2. The notifications are really small and I need them to take over the whole screen
   
   

Should I code an application on Espruino for my Bangle.js? How do I connect the two?

All I need is basically scheduled notifications, but I would also like to expand it to the level that I can take the information collected from my watch (heart rate, and steps) and use it within my Android Studio application.

Any advice is greatly appreciated!