How to change Android App Name and ID of an existing application?

Question

I have two Android projects in Eclipse. I copied the one project from the other, then changed the app name (in strings.xml) and the project name

Answer 1

For those who aren't using Android Studio and want to do it manually (e.g. if you're using React Native), I just recently went through this and had to change it in the following files:

index.android.js
android/settings.gradle
android/app/build.gradle
android/app/src/main/AndroidManifest.xml
android/app/src/main/java/com//MainActivity.java
android/app/src/main/java/com//MainApplication.java