Problem in making http.get() request in flutter

Question

I am learning about API's and http request in flutter and I am facing problem in making a get request as in any tutorial they are directly pasting string URL inside get as parameter but when I post it as string it is showing error:

The argument type 'String' can't be assigned to the parameter type 'Uri'.

Can anyone help me in this? This is my sample code :

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

void main(List<String> arguments) async {
  // This example uses the Google Books API to search for books about http.
  // https://developers.google.com/books/docs/overview
  var url = 'https://www.googleapis.com/books/v1/volumes?q={http}';

  // Await the http get response, then decode the json-formatted response.
  var response = await http.get(url); // i am getting error here
  if (response.statusCode == 200) {
    var jsonResponse = convert.jsonDecode(response.body);
    var itemCount = jsonResponse['totalItems'];
    print('Number of books about http: $itemCount.');
  } else {
    print('Request failed with status: ${response.statusCode}.');
  }
}

Here is image of my code with error:

Answer 1

First, add the http library to your project:

flutter pub add http

Then import http as http:

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

Then parse your link to Uri using:

var url = Uri.parse('https://www.googleapis.com/books/v1/volumes?q={http}');
http.Response response = await http.get(url);
try {
  if (response.statusCode == 200) {
    String data = response.body;
    var decodedData = jsonDecode(data);
    return decodedData;
  } else {
    return 'failed';
  }
} catch (e) {
  return 'failed';
}

Answer 2

If still doesn't work try this:

import 'package:http/http.dart';

var response = get(Uri.parse('https://www.google.com'));