React Native on Android, changing app name, package name and version code

There are things one may need to change in the release build for Android. Things like App Name are a case here. Suppose you start developing by initializing to a generic App Name and at the time of release one need to change to the actual App Name. The same goes for package name, which is visible in Google Play Store and as well in the App details of the Android phone.

Generate with correct names

Before we move forward and change things in the final version of the app. There is a way to fix this from the beginning. Generate an react native app with a proper package name with the command below.

react-native init MyAwesome -package "com.name.app"

But however if at all you have initialized the app as

react-native init RnApp

then the option remains to hack things in the end.

So read on.

App Name

Lets start with App Name. This is the name that's visible in user's screen. To change this name, you have to change it in strings.xml.

Full path is

android/app/src/main/res/values/strings.xml

and the entry is

<string name="app_name">My Android App</string>

Package name

This is shown in the Play Store and the details in About App of your Android device. This should say something like com.myapp or com.company.appname or something similar.

To change this, you have to edit four files.

• android/app/src/main/java/com/reactNativeSampleApp/MainActivity.java
• android/app/src/main/java/com/reactNativeSampleApp/MainApplication.java
• android/app/src/main/AndroidManifest.xml ( optional as per my experience )
• android/app/build.gradle

The first two Java files have the package name as something like below.

package com.ReactNativeApp;

Change it to your desired package name.

package com.myComp.MyApp;

At this point it should be required to make the physical changes to the Java files in the proper package. But somehow it does not work! Rather it breaks the build. Just keep in mind, that we have changed the package names and that should reflect in the actual package. In case the builds break, you know where to find.

Version Code

This is a number which Google Play store recognizes and does not allow uploading another APK having the same value. Just think of this as build number. The same build can not be uploaded twice. So the point is every time, you make a build or release-apk, you must have a different number or more specifically incremental number. If your first version of the application has a version code of 5, then the second version must have a version code which is more than 5.

Along with version code, you might need to update the version name also. Which is the version number of your application and visible in Google Play Store.

While version code is used by Play Store to manage your APK, version name is used by Play Store to notify user that an update to your app is available.

To change these two values, you need to edit

• android/app/build.gradle
• android/app/src/main/AndroidManifest.xml (optional as per my experience )

These settings are taken from build.gradle while making a build with gradle but for the purpose of sanity, it's better to change in both of the files above.

Making the release build

Finally making a release build is done from inside the android folder of the React Native application. The commands are as below.

./gradlew clean
./gradlew assembleRelease

Done