I\'m using react-native, and everything was working well while I was developing, but, when I built the APK (using this tutorial: https://facebook.github.io/react-native/docs/sig
Ok I solved the issue by running the following command before building:
curl "http://localhost:8081/index.android.bundle?platform=android" -o "android/app/src/main/assets/index.android.bundle"