React Native App Development: Error I solved(2)

1. Install NDK To implement screen navigation, I installed react-native-screens along with other related packages. However, I ran into a build error during the process. The root cause was that Android requires the NDK (Native Development Kit) to execute native code. Without a properly configured NDK, some native modules fail to build. After installing an NDK version compatible with my Gradle setup, the issue with react-native-screens was successfully resolved. 2. Edit Environment Variables While downloading various packages and editing environment variables for my React Native project, I accidentally modified some user variables that were already set. After saving the changes, I couldn’t remember the original paths. As a result, I had to manually locate each one and restore them. 3. Error in MainActivity While fixing some errors, I learned that I needed to modify MainActivity . I made the changes and tried to build the project again, but it failed. I realized I had made a mistake in th