Axios (in React-native) not calling server in localhost

if u are using mac this solution worked for me. I am using React Native with Android Simulator ADV. Nexus Api 27

            axios.get('http://192.168.1.21:8686/api/v1/test')
            .then(response => console.log(response))
            .catch(err => console.log(err));

where the ip 192.168.1.21 is from system preferences > Network > Advanced > TCP/IP > IPv4 Address

I also tested axios.get('http://10.0.2.2:8686/bec/api/v1/test') where 10.0.2.2 is localhost from virtual machine to the computer but not worked.

The solution came from a different source, but I post it here to help others looking for the same issue. Basically I used Android AVD (emulator) to build the application. But the emulator is in fact another machine, and that's why it couldn't call the localhost.

To solve the probleme, I had to send the request in the following way:

https://10.0.2.2:3000/v1/test

instead of:

https://localhost:3000/v1/test