Application is not Registered in react native

Question

I have a react native application and I changed the package name of the application using https://www.npmjs.com/package/react-native-rename. After that I tried to run the projec

Answer 1

You need to check 2 files to make sure you have equal names there:

1. index.js -> application name in the last line:

AppRegistry.registerComponent('YourAppName', () => App);

2. app.json -> name property

In both places names should be equal (case sensitive).

Answer 2

Have you changed the values ​​in the index.ios.js, index.android.js and app.json files?

There are some instructions here.

Answer 3

android\app\src\main\java\com{someFolderName}\MainActivity.java

you landed up on this answer because still you are not able to solve the issue

open the file mentioned in above in title
this used for

• Returns the name of the main component registered from JavaScript.
• This is used to schedule rendering of the component.

look for method

    @Override
    protected String getMainComponentName() {
        return "AddYourNewNameHere";
    }

which might be returning a hard coded string replace it to desired name!!

EXTENDED TIP

ensure you clean your gradle demon as the project does not compile sometimes for that use following

• cd android
• gradlew clean