React Native: Configuring an Application per Environment
• Mark Eschbach
Wrote the latest iteration of my home services apps mobile client in React Native. Testing against my local laptop on my phone over WiFi worked well. Now I just need to package per-environment URLs to work with my naming scheme.
Run the following in a shell.
yarn add react-native-config
I setup a
.env file in the root of my project folder, then attempted to suck in the values via:
import Config from 'react-native-config';
To get the values. Unfortunately that did not work. Although auto-linking did oddly. Turns out there is one more step
which must be done on Android; I am currently only building this application for Android so I did not check iOS. The
following needs to be placed in
android/app/build.gradle right under your other
apply from: project(':react-native-config').projectDir.getPath() + "/dotenv.gradle"
After checking with a build and release it did not work unfortunately. Found a new method to check logs for a specific application:
adb logcat --pid=$(adb shell pidof -s com.example.app)
Additional changes need to be made to the Android build. Although this time it makes sense the auto-install mechanism
would be skipped given how flexible the Android flavors are. I stuck the following below the
project.ext.envConfigFiles = [
After a build and test deployment it worked. Still need to setup the debug variant to have a different artifact ID.