Android: add custom fonts to system

Question

I know how to use custom font in an app, but what I want to do is adding custom fonts system-wide, just like adding a new font on Windows. If there's no official way, which module of android source code should I read? I have to change android source code and build it to support custom fonts.

Answer 1

Here are steps to add custom font into Android build-in system:

• Copy custom font .ttf into frameworks/base/data/fonts
  

• Modify frameworks/base/data/fonts/Android.mk
  Add your custom font into list of 'font_src_files'

  font_src_files :=
  Roboto-Regular.ttf
  .... AndroidClock_Solid.ttf
  <custom_font>.ttf \

• Modify frameworks/base/data/fonts/fonts.mk
  Add your custom font into list of PRODUCT_PACKAGES

  PRODUCT_PACKAGES :=
  DroidSansFallback.ttf
  ... AndroidClock_Solid.ttf
  <custom_font>.ttf \

• Rebuild
  NOTE: Check if your custom font exists in out/target/product/generic/system/fonts or not. If yes, your custom font have already included in system. If no, recheck your modification.