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rakesh kumar
rakesh kumar

Posted on

How to change package name when you publish app in playstore in React Native

Update applicationId in build.gradle
File: android/app/build.gradle

android {
    defaultConfig {
        // BEFORE
        applicationId "com.cotocus.wizbrand.application"

        // AFTER (Example)
        applicationId "com.yourcompany.newappname"
    }
}
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Why: This sets the unique Android app ID used in Google Play Store.

Update package in AndroidManifest.xml
File: android/app/src/main/AndroidManifest.xml

xml
<!-- BEFORE -->
<manifest 
    package="com.cotocus.wizbrand.application">

<!-- AFTER -->
<manifest 
    package="com.yourcompany.newappname">
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Why: Must match applicationId for proper resource resolution.

  1. Update Java/Kotlin Package Declarations File: MainActivity.java (or .kt) 
// BEFORE
package com.cotocus.wizbrand.application;

// AFTER
package com.yourcompany.newappname;
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Why: Ensures Java/Kotlin classes use the correct package.

  1. Rename Java/Kotlin Folders Path: android/app/src/main/java/com/cotocus/wizbrand/application Steps: 
Right-click folder → Refactor → Rename
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Change to com/yourcompany/newappname

Apply to all references.

  1. Update package.json & app.json File: package.json (root directory) 
json
// BEFORE
"name": "old-app-name"

// AFTER
"name": "new-app-name"
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File: app.json

json
// BEFORE
"displayName": "Old App Name"

// AFTER
"displayName": "New App Name"
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Why: Maintains consistency in React Native tooling.

  1. Clean & Rebuild 
cd android && ./gradlew clean && cd ..
npm run android
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7.Your package declaration at the top of MainApplication.kt and MainActivity.kt must also match
C:\Project\Motosharerpartners\android\app\src\main\java\com\motosharercar\MainApplication.kt

package com.yourcompany.newappname
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package com.motosharerpartners
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