How to set a font family to an app when your phone use custom font family?

Question

I have created an Android app with an "Arial" font family, my phone use a custom font family and when i launch my application i dont have an Arial font family but the custom font family of my phone. Any idea how to fix that?

Theme

TextView code

What i want

What i have

Answer 1

try to set font family in every text view using.

<TextView
   android:fontFamily="@font/fontfamily"/>