Calling Api in Flutter.

akashswamy

Hello! Today we will see how to call an API in Flutter.

We will use a structure to call an API. We'll mostly use the API in the Screen folder.

We use the following folders and file names:

model=> resModal.dart (Each API response is dependent on a file, and each API has its own.)

screen=>home.dart (the screen where we want to invoke the API and display the result)

services=>api_calls.dart (created and attained by oneself).

services=> user_api.dart (This file will contain a class with a function that can be called.)

Required Dependencies: http: any

api_call.txt

As an example, consider the following API call: user_api.dart, shown below:

import 'api_calls.dart';
import 'package:flutter/material.dart';
import '../model/responseModal.dart';
import 'dart:convert';
import 'package:http/http.dart' as http;
class UserApi{
const baseUrl = "http://webgrid.in/projects/projectname/";

  static Future<responseModal?> api_call_fun() async {
    try {
      final res = await post({},"${baseUrl}api_name" , {});
      if (res != null) {
        return responseModal.fromJson(jsonDecode(res.body));
      } else {
        print("Null Response");
        return null;
      }
    } catch (e) {
      debugPrint('hello bev=bug $e ');
      return null;
    }
  }
}

How to use the user_api function in the screen.

import '../model/

Modal.txt

responseModal.dart';

Import above in top of imports in the class of screen.

Should write the following process, which extends State.

List<favlist> reslist=[];
void initState(){
super.initState();
call_api(); 
}
Future<void> call_api() async{
  await UserApi.api_call_fun().then((data) => {

    if(data != null){
      setState(() {
        if(data.error=="0"){
          reslist=data.list!;
        }
        else{
          toast("Welcome To Wallet");
        }
      })
    }

  });
}

After calling this function, the data from the API will be stored in the appropriate list or object.

Thank you.