How to point to localhost:8000 with the Dart http package in Flutter?

Question

Replacing the string localhost with 10.0.2.2 resolved it for me, since I was running the code in the Android emulator, which is running in a VM. It's essentially a duplicate of this question.

replace 'localhost' in your url to wifi connection ip e.g : 'http://localhost:8000' => 'http://192.168.1.102:8000'. you can get your wifi ip from command prompt with cmd>ipconfig (wireless LAN adapter WI-FI.

var url = 'http://192.168.1.102:8000';
Future<String> getUnits(String category) async {
    var response = await httpClient.get('$url/$category');
    return response.body;
}

If you are using an Android emulator then localhost on the emulator is not 127.0.0.0 it is 10.0.2.2, so, on Android emulator you need to write https://10.0.2.2:8000, the https://127.0.0.1:8000 will not work on real device too. because localhost means something different on real device.

For more information on how to connect a Flutter app to localhost on emulator or on a real device click on the link Connecting Flutter application to Localhost

Short answer: You can pass an Uri instead of a string as parameter

      var client = createHttpClient();
      client.get(new Uri.http("locahost:8000", "/category"));

I had the same problem, so apparently, I found a solution for this problem, so because you are in a virtual environment with your phone you cant use the localhost because the phone is not connected with your PC so simply, in my case, it worked, just use:

10.0.2.2:PORT 

use this URL with your Port and it should work :)