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validator: (value){ if(value!=isEmpty) { return "username cannot be empty"; } return null; },

Blue Bird answered on August 6, 2022 Popularity 1/10 Helpfulness 1/10

answer validator: (value){ if(value!=isEmpty) { return "username cannot be empty"; } return null; },

validator: (value){ if(value!=isEmpty) { return "username cannot be empty"; } return null; },

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import 'package:flutter/material.dart';
import 'package:learning/pages/utis/routes.dart';

class LoginPage extends StatefulWidget {
  const LoginPage({Key? key}) : super(key: key);

  @override
  _LoginPageState createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  String name = "";
  bool changebutton = false;
  final _formKey = GlobalKey<FormState>();



 movetoHome(BuildContext context) {
    if (_formKey.currentState!.validate()) {
      print("before if");

  setState(() {
    changebutton = true;
    print("Change button 1");
  });
  Future.delayed(Duration(seconds: 1));
  print("while await");
  Navigator.pushNamed(context, Myroutes.homeRoute);
  print("after Naviagtor");
  setState(() {
    changebutton = false;
  });
}


}



Widget build(BuildContext context) {
    return Scaffold(
        backgroundColor: Colors.white,
        body: Form(
          child: SingleChildScrollView(
            child: Column(
              children: [
                Image.asset(
                  "assets/images/login_image.png",
                  fit: BoxFit.cover,
                ),
                SizedBox(height: 10),
                Text(
                  "Welcome $name",
                  style: TextStyle(
                    fontSize: 25,
                    fontWeight: FontWeight.bold,
                    color: Colors.black,
                  ),
                ),
                Padding(
                  padding:
                      const EdgeInsets.symmetric(horizontal: 40, vertical: 30),
                  child: Column(
                    key: _formKey,
                    children: [
                      TextFormField(
                        validator: (value) {
                          if (value!.isEmpty) {
                            return "Username cannot be empty";
                          }

               

   return null;
                    },
                        decoration: InputDecoration(
                          labelText: "Username",
                          hintText: "Enter Username",
                        ),
                        onChanged: (value) {
                          name = value;
                          setState(() {});
                        },
                      ),
                      TextFormField(
                        validator: (value) {
                          if (value!.isEmpty) {
                            return "Password cant be Empty";
                          } else if (value.length < 6) {
                            return "Password should be greater the 6 ";
                          }
                          return null;
                        },
                        obscureText: true,
                        decoration: InputDecoration(
                          labelText: "Password",
                          hintText: "Enter password",
                        ),
                      )
                    ],
                  ),
                ),
                Material(
                  borderRadius: BorderRadius.circular(changebutton ? 80 : 10),
                  color: Colors.purple,
                  child: InkWell(
                    onTap: () => movetoHome(context),
                    child: AnimatedContainer(
                      duration: Duration(
                        seconds: 1,
                      ),
                      alignment: Alignment.center,
                      child: changebutton
                          ? Icon(
                              Icons.check,
                              color: Colors.white,
                            )
                          : Text(
                              "Login",
                              style: TextStyle(
                                color: Colors.white,
                                fontWeight: FontWeight.bold,
                                fontSize: 16,
                              ),
                            ),
                      height: 40,
                      width: changebutton ? 40 : 100,
                    ),
                  ),
                ),
                
              ],
            ),
          ),
        ));
  }
}

Popularity 1/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: return whatever

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Contributed on Aug 06 2022

Blue Bird

0 Answers Avg Quality 2/10

validator: (value){ if(value!=isEmpty) { return "username cannot be empty"; } return null; },

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