Flutter | Dart : Target of URI does not exist

Question

I am making my first Application to build an Android App with Flutter. I am using Android Studio as IDE. The problem is when I import the http package:

 import 'package:http/http.dart' as http;

I get an error :

error: Target of URI doesn't exist: 'package:http/http.dart'. (uri_does_not_exist at [flutter_crypto] lib\home_page.dart:3)

That's my code :

  Future<List> getCurrencies() async{
    String cryptoUrl = "https://api.coinmarketcap.com/v1/ticker/?limit=50";
    http.Response response = await http.get(cryptoUrl);
    return JSON.decode(response.body);
  } 

Thanks,

Answer 1

You need to add the HTTP dependency to pubspec.yaml as per below.

 dependencies:
      flutter:
        sdk: flutter

      # The following adds the Cupertino Icons font to your application.
      # Use with the CupertinoIcons class for iOS style icons.
      cupertino_icons: ^0.1.2
      http: ^0.12.0

With the dependency added you then need to run the following command to update/install required packages:

flutter packages upgrade

Hope this helps

Answer 2

Make sure you have added the dependency to pubspec.yaml

dependencies:
  http: ^0.12.0

You will also need to:

flutter packages get