AAPT: error: resource android:attr/fontVariationSettings not found and resource android:attr/ttcIndex not found

Question

I m currently working on an android project, so when I upgrade the project from android targetSdkVersion 21 to 27, the project won\'t work. so if there\'s anyon

Answer 1

The error is:

AAPT: error: resource android:attr/fontVariationSettings not found.
AAPT: error: resource android:attr/ttcIndex not found

Change the compileSdkVersion to:

compileSdkVersion 28

fontVariationSettings and ttcIndex were added in api level 28.

Answer 2

If you have stumbled upon this problem due to getting this error recently out of nowhere in react native- this is due to the latest BREAKING CHANGE in Google Play service and Firebase. Specially you will have problem with the packages which are dependent on -

com.google.android.gms:play-services-gcm

Check this thread first -

https://github.com/facebook/react-native/issues/25293

And solution would mostly be like this -

https://github.com/facebook/react-native/issues/25293#issuecomment-503045776

Answer 3

I just found the source of the issue by using CTRL+SHIFT+F and looking for the problematic attributes in the code (of the entire scope). Turns out in my case the culprit was a third party dependency. Once i uninstalled it it was fixed. I guess the issue came from updating gradle and these outdated libraries somehow interfering with it. I still dont understand the nature of the issue exactly but I hope this helps someone else dealing with the same issue.