Flutter Passing data between screens – send data to another page

August 2, 2021

28000

Sometime, you not only want to navigate user to next screen page, but also want to pass data from screen 1 to screen 2.

For Example: A Screen 1 in your flutter app has a TextField & user enter the data, same data you want on screen 2 for further action.

In this flutter tutorial example, we will learn how to pass data between screens – In other words flutter send data to another page.

Flutter pass data between screens – Complete Video tutorial

Here we will have 2 Screens.

1. main.dart(Screen 1): Has TextField ( Name, Email, Phone ) where user can enter data & a button when pressed sends data from screen 1 to screen 2 using Navigator.push() to screen 2 with data passed through a constructor.

2. WelcomePage.dart(Screen 2): Will have a constructor that received data from screen 1 and then display the data in Text Widget in Screen 2.

So let’s begin with Code

1. Create a dart file – WelcomePage.dart

In Welcome page, we will just show the data received from main.dart page in a Text Widget.

As i said above, WelcomePage.dart will have a Constructor that accepts some Required data String parameter such as Name, Email, Phone.

   #constructor Snippet Code
   String name,email,phone;
   WelcomePage({Key? key,required this.name,required this.email,required this.phone}) : super(key: key);

Then use the String data to print in Text Widget.

Text('Name: $name'),

Note: If you are using Stateful Widget, then you cannot directly use the data, for that you need to use widget.data as below.

 Text('Name: ${widget.name}'),

WelcomePage.dart Complete Code

import 'package:flutter/material.dart';

class WelcomePage extends StatelessWidget {
   String name,email,phone;
   WelcomePage({Key? key,required this.name,required this.email,required this.phone}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
    body: Center(
      child: Center(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text('Name: $name'),
            Text('Email: $email'),
            Text('Phone: $phone'),
          ],
        ),
      ),
    ),
    );
  }
}

2. main.dart – Where user will Enter The Data in TextField.

In main.dart, we will have 3 TextField where user can enter his Name, Email & Phone No and a button when pressed will send the entered data to Page 2(WelcomePage.dart) using Navigator.push() & pass the data through WelcomePage Constructor.

In each TextField we have attached TextEditingController that will hold the data entered by the user in textField.

Navigator to pass data to screen 2 ( Welcomepage)

Navigator.of(context).push(MaterialPageRoute(
                                             builder: (context) => WelcomePage(
                                                                  name: _name.text,
                                                                  email: _email.text,
                                                                  phone: _phone.text)
                                                            )
                                             );

main.dart complete code

import 'package:flutter/material.dart';
import 'package:passing_data/ToDoDetail.dart';
import 'package:passing_data/Todo.dart';
import 'package:passing_data/WelcomePage.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Form(),
    );
  }
}

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

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

class _FormState extends State<Form> {
  TextEditingController _name = TextEditingController();
  TextEditingController _email = TextEditingController();
  TextEditingController _phone = TextEditingController();
  @override
  Widget build(BuildContext context) {
    return  Scaffold(
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: TextField(
                controller: _name,
                decoration: InputDecoration(
                  border: OutlineInputBorder(),
                  labelText: 'Enter your Name'
                ),
              ),
            ),
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: TextField(
                controller: _email,
                decoration: InputDecoration(
                    border: OutlineInputBorder(),
                    labelText: 'Enter your Email'
                ),
              ),
            ),
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: TextField(
                controller: _phone,
                decoration: InputDecoration(
                    border: OutlineInputBorder(),
                    labelText: 'Enter your Phone No'
                ),
              ),
            ),
            ElevatedButton(onPressed: (){

              Navigator.of(context).push(MaterialPageRoute(builder: (context)=>WelcomePage(name: _name.text, email: _email.text, phone: _phone.text)));

            }, child: Text('Go Next Page'))
          ],
        ),
      ),
    );
  }
}