MainActivity.java and MainApplication.java errors

This issue is related to #66

I am creating a separate issue because I noticed some additional issues:

When I ran the command

react-native-rename "TravelApp" -b com.travelcompany.app

The following issues occurred:

1. Deleted my MainApplication.java file instead of just changing the package name.
2. In MainActivity.java, it didn’t change the return value of getMainComponentName() causing app to crash on launch on android because AppRegistry.registerComponent() takes the name from app.json which IS updated but this value is not.

[priyangamani]

1.Try to copy the previous Mainapplication.java file and MainActivity.Java file 2.And Try to rename the package name inside Mainapplication.java file from (old package name) to com.demo (new package name) and similar to MainActivity.Java 3.getMainComponentName() change the return value to “Demo” (your App Name)

[josegoval]

This thing still happening today.

To solve this I copied, as explained other comments, previous MainJavaActivity.java and MainApplication.java and changed the package declaration with the folder destination com.newName.nextNewName, and the return of getMainComponentName() from MainActivity with the name displayed (name key) on app.json.