问题
I've got virtual box installed. And when I look at the host > LAN > ip address is exp://192.168.56.1:19000.
How can I change it without disable the network? because it's my virtualbox ip and my device can't connect to it.
Thanks
回答1:
You can specify the REACT_NATIVE_PACKAGER_HOSTNAME environment variable to use the correct IP address.
If you're using XDE, then make sure to launch it from your project directory with xde . after you've installed the command line tools.
回答2:
In windows you can use:
set REACT_NATIVE_PACKAGER_HOSTNAME=192.168.1.59
set is only used for one session. If you always wanna use the same ip after reboot you can use:
setx /M REACT_NATIVE_PACKAGER_HOSTNAME 192.168.1.59
回答3:
Even after you set the custom ip, you still cannot connect the virtual box.
You need to set a port forward for the virtual mechine at networking setting page.
Just use the real host mechine ip for the app Expo.
REACT_NATIVE_PACKAGER_HOSTNAME='real host mechine ip' npm start
回答4:
check your pc whether install virtualbox , disable VirtualBox Host-Only Network
go to win pc: Control Panel\Network and Internet\Network Connections
run again command expo start is ok
回答5:
I have similar kind of problem (with may a slight difference), but the solution doesn't work for me. Finally I tried Expo CLI tool which worked great for me and is also recommended by Expo team.
My detailed question (may help someone to resolve similar problem):
Expo LAN configuration doesn't work for New ReactNative Project
回答6:
Open CMD from your Project Directory and Run Command as set REACT_NATIVE_PACKAGER_HOSTNAME=192.168.0.12. Replace the ip with your own LAN ip address.
The Command set is used to set the Environment variable locally, without defining it into Environment Variables.
回答7:
If you have "ubuntu in windows" configured you can automate the process and run:
for /F "usebackq delims=" %A in (`ipconfig ^| grep -A4 'Wireless LAN adapter WiFi' ^| tail -1 ^| awk '{print $NF}'`) do set REACT_NATIVE_PACKAGER_HOSTNAME=%A
回答8:
On the Windows Subsystem for Linux (Ubuntu 18.04.1 LTS "Bionic"), I had to use the export command:
export REACT_NATIVE_PACKAGER_HOSTNAME=192.168.1.76.
来源：https://stackoverflow.com/questions/43696813/react-native-expo-change-default-lan-ip