asd

import 'dart:convert';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:http/http.dart';

class LoginForm extends StatefulWidget {
  @override
  _LoginFormState createState() => _LoginFormState();
}

class _LoginFormState extends State<LoginForm> {

  GlobalKey<FormState> _formKey = GlobalKey();
  String username = "";
  String password = "";
  String message ="";

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Center(child: Text("Login Form")),
        ),
        body: Form(
          key: _formKey,
          child: Column(
            children: <Widget>[
              SizedBox(
                height: 20,
              ),
              Text(message),
              TextFormField(
                decoration: InputDecoration(
                  hintText: "Username",
                  icon: Icon(Icons.person),
                ),
                validator: (value){
                  if(value.isEmpty) return "Username cannot be empty";
                  return null;
                },
                onSaved: (value){
                  username=value;
                },
              ),
              TextFormField(
                decoration: InputDecoration(
                  hintText: "Password",
                  icon: Icon(Icons.vpn_key),
                ),
                validator: (value){
                  if(value.isEmpty) return "Password cannot be empty";
                  return null;
                },
                onSaved: (value){
                  password=value;
                },
              ),
              RaisedButton(
                onPressed: this._onLoginClicked,
                child: Text("Login"),
              )
            ],
          ),
        ),
      );
  }

  _onLoginClicked() async{
    if(!_formKey.currentState.validate())return;
    _formKey.currentState.save();

    Map<String,dynamic> body = {
      'username':username,
      'password':password
    };
    try{
      Response response=await post('http://flutter.sochware.com/api/login',body:body);
      print("COde : ${response.statusCode}");
      print(response.body);
      var jsonData=json.decode(response.body);
        setState((){
          message=jsonData['message'];
        });
      }catch(error){
      print(error);
      if(error is SocketException){
        setState(() {
         message="Internet not available";
        });
        return;
      }

    }

    }
}