Or do these updates require a ./gradle clean build uninstall/reinstall or something similar?

CodePudding user response：

No, changes to native code will always require a rebuild. Towards the end of the Native Modules tutorial is this:

The final step is to rebuild the React Native app so that you can have the latest native code (with your new native module!) available.

Source: https://reactnative.dev/docs/native-modules-android#test-what-you-have-built

CodePudding user response：

Fast refresh works only for javascript changes not for internal files of android and iOS. You need to build the app again.