Create a mobile app with three programming language

Question

So i have a friend, and he said that he create a iot mobile aplication using 3 programming language (Java ,kotlin , dart), i don't have knowledge about creating software with multiple language and mobile development(i learn about desktop and game),so for confirmation,is it possible create ONE mobile aplication using Java,kotlin,and dart at once?
I'm sorry if i ask a such stupid question
Thank you

Answer 1

Trend is to code multiplatform mobile app with one code base.
For example, Flutter with Dart.
Here is a video introducing and comparing different tech stacks:
Mobile app development choices
https://youtu.be/4m7msadL5iA

Answer 2

Anything is possible, but you would need a good reason to mix them to make up for the difficulty to do so. Kotlin and Java are designed to interoperate. Dart will not be easy to add into the mix. But, if half your code existed in Dart and you have exising code in Java or Kotlin, it would be easier to interface them over recoding either side.

Answer 3

Using Java, Kotlin, and Dart together.. the answer is NO..
For a single app only one language is required to built an app.
He/She might be using some other languages in the backend, but on the front-end any one language is sufficient.

Answer 4

No choose one for a single app