React Native: fetch request failed with error - TypeError: Network request failed(…)

Question

I am developing a simple app using React Native. I am testing it on Android device. I have created a Node.js server to listen to the requests, it is running at http://localh

Answer 1

Since your Android device has an IP of its own, you need to point the URL to your computers IP address instead of just localhost. For example fetch('http://192.168.0.2:3333/').

Answer 2

Use the reverse command of the Android Debug Bridge tool (adb):

adb reverse <remote> <local> - reverse socket connections.
                               reverse specs are one of:
                                 tcp:<port>
                                 localabstract:<unix domain socket name>
                                 localreserved:<unix domain socket name>
                                 localfilesystem:<unix domain socket name>

For example:

adb reverse tcp:3333 tcp:3333

This makes localhost:3333 accessible from your device. You can also use different ports. For example:

adb reverse tcp:8081 tcp:3333

This will redirect the device port 8081 to the local port 3333.