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how to change package name in ios react native

I use the react-native-rename npm package.

Install using

npm install react-native-rename -g

Then from the root of your React Native project execute the following

react-native-rename "MyApp" -b com.mycompany.myapp

how to change package name in react native

I have changed project subfolder name from:
"android/app/src/main/java/MY/APP/OLD_ID/"
to: "android/app/src/main/java/MY/APP/NEW_ID/"

Then manually switched the old and new package ids:

In: android/app/src/main/java/MY/APP/NEW_ID/MainActivity.java:

package MY.APP.NEW_ID;
In android/app/src/main/java/MY/APP/NEW_ID/MainApplication.java:

package MY.APP.NEW_ID;
In android/app/src/main/AndroidManifest.xml:

package="MY.APP.NEW_ID"
And in android/app/build.gradle:

applicationId "MY.APP.NEW_ID"
(Optional) In android/app/BUCK:

android_build_config(
  package="MY.APP.NEW_ID"
)
android_resource(
  package="MY.APP.NEW_ID"
)
Gradle' cleaning in the end (in /android folder):

./gradlew clean