Is it possible to set a custom font for entire of application?

Question

I need to use certain font for my entire application. I have .ttf file for the same. Is it possible to set this as default font, at application start up and then use it else

Answer 1

I would also like to improve weston's answer for API 21 Android 5.0.

I had the same issue on my Samsung s5, when using DEFAULT font. (with the others fonts it's working fine)

I managed to make it working by setting the typeface ("sans" for example) in XML files, for each Textview or Button

and in MyApplication Class :

public class MyApplication extends Application {
    @Override
    public void onCreate() {
    TypefaceUtil.overrideFont(getApplicationContext(), "SANS_SERIF",
    "fonts/my_font.ttf");
    }
}

Hope it helps.