How to get Text Input Value on Button Click in Flutter

The sample Google flutter code below illustrate how to get text input value on button click in flutter. You can also check our previous tutorial on android click event to understand how click event is implemented in flutter.

The code is based on flutter version 1.0.0

Main.dart (App entry point)

import 'package:flutter/material.dart';
import 'text_input_value.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',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      //home: MyHomePage(title: 'Flutter Demo Home Page'),
      home: TextInputValue(),
    );
  }
}
text_input_value.dart
import 'package:flutter/material.dart';

class TextInputValue extends StatefulWidget {
  _TextInputValueState createState() => _TextInputValueState();
}

class _TextInputValueState extends State<TextInputValue> {
  TextEditingController _textInputController = TextEditingController();
  String _showText = "";

  _onPressed() {
    setState(() {
      _showText = _textInputController.text;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text('Text Input Value'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              Text("Submitted Text: $_showText"),
              Padding(
                padding: const EdgeInsets.all(15.0),
                child: TextField(
                  controller: _textInputController,
                  autocorrect: true,
                  decoration: InputDecoration(hintText: 'Enter a Text here'),
                ),
              ),
              RaisedButton(
                onPressed: _onPressed,
                child: Text('Submit'),
              )
            ],
          ),
        ));
  }
}

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