AAPT: error: resource android:attr/fontVariationSettings not found for Ionic 3 and Android 6.4.0

@dalezak-ushahidi wrote:

We started having issues building our Ionic 3.9.2 app for android@6.4.0 getting the error:

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

We’re currently using cordova@8.1.2, ionic@3.20.1 and android@6.4.0.

npm install -g cordova@8.1.2
npm install -g ionic@3.20.1
ionic cordova platform add android@6.4.0 --buildConfig=build.json

Some posts suggest fontVariationSettings added in api level 28, however when I try using android@7.1.4 or android@8.0.0 I start getting different errors like:

error: cannot find symbol 
import com.google.firebase.iid.FirebaseInstanceIdService;

What is the recommended version of cordova and cordova-android to use with ionic-angular@3.9.2?

Which version of Android SDK is supported for Ionic 3.9.2? Should we be targeting 26, 27, or 28?

Something’s got out of sync and now it feels like we’re going down a rabbit hole trying different versions of dependencies to get things compiling again.

Any help or suggestions would be greatly appreciated!

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