how can set font for all application content and custom library use in it

[SeyedAliFarjaD]

Thank you for this useful lib. but if use another lib for example dialogs font override not work in that.
it is possible override for them too ?

[chrisjenx]

This will work anywhere there is a view created from the base context of that activity, If a third party lib is instantiating views programmatically then you'll need to apply font programmatically.

You'll need to provide example code/project for a more definitive answer, as I'm not 100% sure what you are asking.