React-Native productFlavors (Error type 3: Activity class does not exist)

Question

I want to use 2 productFlavors for my Android App: live and staging.

In app/build.grandle I defined them like this: <

Answer 1

Uninstall the app from the device using:

cd android && ./gradlew uninstallAll

Then run the app again using:

react-native start
react-native run-android

Answer 2

Add the --appId on run command, so the react native will know where to find the Main Activity:

react-native run-android --variant=stagingDebug --appId com.some.id.staging

Answer 3

Cause you change the applicationId in the productFlavors, react-native-cli can't recognize it. To fix, just add your changed appId when run start command

react-native run-android --variant=staging --appId com.some.id.staging

Answer 4

Try giving resValue like this:

staging { applicationId "com.some.id.staging" resValue "string", "build_config_package", "com.some.id" }

Answer 5

I had the same issue and I solve by adding the appIdSuffix to the react-native run command.

react-native run-android --variant variantDebug --appIdSuffix suffix

Answer 6

There is a pull request pending for React Native that will fix this issue.

Until then you can simply replace /node_modules/react-native/local-cli/runAndroid/runAndroid.js with the runAndroid.js file from the pull request.