Error type 3. Activity class {com.awesome_project/ com.awesome_project.MainActivity} does not exist in react native (Android device)

Question

I\'ve created the project using the following command.

react-native init Awesome_Project

I\'ve started the packager using the following com

Answer 1

Make sure android/app/build.gradle

defaultConfig {
        applicationId "WHATEVER_THIS_IS" 
}

needs to match android/app/src/main/java/com/app_name/MainActivity.java line one:

package WHATEVER_THIS_IS;

needs to match android/app/src/main/java/com/app_name/MainApplication.java line one:

package WHATEVER_THIS_IS;

needs to match android/app/src/main/AndroidManifest.xml line one:

package="WHATEVER_THIS_IS">