Recently I started working with React Native and got a blank white screen after installing the example app.
I generated a basic app using
react-native init testapp first and installed it on my android device using
react-native run-android. When I opened the app, Its a blank screen. I’m sharing the reason for blank screen and solution for it.
Usually, we get a blank screen when the app is not connected to React Native development server. Make sure that you have started the development server in another terminal using
npm start in project root folder.
If dev server is running then dev server can be accessed locally over USB or over Wifi.
Accessing dev server locally over USB
Usually, Default settings in the react native app should work if the device is connected to PC and USB debugging is enabled. If it doesn’t then try running below command in terminal. This works if you’re using Android 5.0 (Lollipop)
adb reverse tcp:8081 tcp:8081
Accessing dev server over Wi-Fi
If your mobile device and PC are on same WiFi network then this method can be used.
Make sure that dev server is running and set the IP address of your PC in dev settings. Open dev settings by shaking the phone or press and hold menu button. Get your IP address using the command
ipconfig in your terminal.
If you’re unable to access dev server over WiFi, check your firewall settings and add an inbound rule for port 8081 and allow connections.
Unable to react native open developer menu on android
In few android mobiles, developer menu doesn’t open by shaking the phone or long press menu button. This is because of a permission being disabled. I’m using Redmi Note which has a default permission manager which disables
Display popup window permission by default. Just enable it in the app settings and it should work!
Hope this helps others who are facing the same problem.