无法从本地api React-Native获取数据

Question

I have a web application, in react using an API made in Laravel. I want to make a mobile app using the same API. I can't fetch data, because I get NETWORK REQUEST FAILED error. This is how I try to fetch data:

handleButton = () => {
    try {
        fetch(`127.0.0.1:8081/test`).then(response =>
        console.log(response)
    );
        } catch (e) {
            console.log(e);
        }
    };

I tried changing the ip in dev settings to my machine id, i tried using localhost not the ip(127.0.0.1) but none of those fixed it... I can't seem to find anything else. Here is the error text:

Possible Unhandled Promise Rejection (id: 0):
TypeError: Network request failed
TypeError: Network request failed
    at XMLHttpRequest.xhr.onerror (blob:http://localhost:8081/cfc373de-8318-4df3-b46a-7b17d4926c5e:42556:18)
    at XMLHttpRequest.dispatchEvent (blob:http://localhost:8081/cfc373de-8318-4df3-b46a-7b17d4926c5e:47998:27)
    at XMLHttpRequest.setReadyState (blob:http://localhost:8081/cfc373de-8318-4df3-b46a-7b17d4926c5e:46859:20)
    at XMLHttpRequest.__didCompleteResponse (blob:http://localhost:8081/cfc373de-8318-4df3-b46a-7b17d4926c5e:46686:16)
    at blob:http://localhost:8081/cfc373de-8318-4df3-b46a-7b17d4926c5e:46796:47
    at RCTDeviceEventEmitter.emit (blob:http://localhost:8081/cfc373de-8318-4df3-b46a-7b17d4926c5e:16875:37)
    at MessageQueue.__callFunction (blob:http://localhost:8081/cfc373de-8318-4df3-b46a-7b17d4926c5e:16488:44)
    at blob:http://localhost:8081/cfc373de-8318-4df3-b46a-7b17d4926c5e:16245:17
    at MessageQueue.__guard (blob:http://localhost:8081/cfc373de-8318-4df3-b46a-7b17d4926c5e:16442:13)
    at MessageQueue.callFunctionReturnFlushedQueue (blob:http://localhost:8081/cfc373de-8318-4df3-b46a-7b17d4926c5e:16244:14)

EDIT:

I am using android studio's emulator, because i don't have an android device running android > 5

Answer 1

Use the IP of your machine on the local network.

Open up terminal/cmd.

If you're using a mac, you can use ifconfig and it's usually under en0 . You will see something like 192.168.0.32 or similar.

If you're using windows, you can use ipconfig .