如何解除屏幕上的键盘?

我用TextFormField收集用户输入，当用户按下FloatingActionButton表示他们已经完成时，我想解散屏幕上的键盘。

如何让键盘自动消失?

import 'package:flutter/material.dart';

class MyHomePage extends StatefulWidget {
  MyHomePageState createState() => new MyHomePageState();
}

class MyHomePageState extends State<MyHomePage> {
  TextEditingController _controller = new TextEditingController();

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(),
      floatingActionButton: new FloatingActionButton(
        child: new Icon(Icons.send),
        onPressed: () {
          setState(() {
            // send message
            // dismiss on screen keyboard here
            _controller.clear();
          });
        },
      ),
      body: new Container(
        alignment: FractionalOffset.center,
        padding: new EdgeInsets.all(20.0),
        child: new TextFormField(
          controller: _controller,
          decoration: new InputDecoration(labelText: 'Example Text'),
        ),
      ),
    );
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new MyHomePage(),
    );
  }
}

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

当前回答

在需要时调用此函数

  void hideKeyboard(BuildContext context) {
      FocusScopeNode currentFocus = FocusScope.of(context);
      if (!currentFocus.hasPrimaryFocus && currentFocus.focusedChild != null) {
        FocusManager.instance.primaryFocus?.unfocus();
      }
    }

2022-01-30 07:06:21

其他回答

您可以使用FocusNode类中的unfocus()方法。

import 'package:flutter/material.dart';

class MyHomePage extends StatefulWidget {
  MyHomePageState createState() => new MyHomePageState();
}

class MyHomePageState extends State<MyHomePage> {
  TextEditingController _controller = new TextEditingController();
  FocusNode _focusNode = new FocusNode(); //1 - declare and initialize variable

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(),
      floatingActionButton: new FloatingActionButton(
        child: new Icon(Icons.send),
        onPressed: () {
            _focusNode.unfocus(); //3 - call this method here
        },
      ),
      body: new Container(
        alignment: FractionalOffset.center,
        padding: new EdgeInsets.all(20.0),
        child: new TextFormField(
          controller: _controller,
          focusNode: _focusNode, //2 - assign it to your TextFormField
          decoration: new InputDecoration(labelText: 'Example Text'),
        ),
      ),
    );
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new MyHomePage(),
    );
  }
}

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

2019-01-31 19:41:16

使用FocusScope的解决方案不适合我。我又找到了一个:

import 'package:flutter/services.dart';

SystemChannels.textInput.invokeMethod('TextInput.hide');

它解决了我的问题。

2018-08-08 07:41:14

======解散键盘后，点击TextField =======

 @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () => FocusScope.of(context).unfocus(),  //this will dismiss keyboard
      child: Scaffold(
        body: SafeArea(
               .........

======滚动屏幕时关闭键盘=======

ListView(
            keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag, //this will dismiss
            children: [
               ..........

SingleChildScrollView小部件也有这个属性。

2022-09-22 09:17:45

_dismissKeyboard(BuildContext context) {
   FocusScope.of(context).requestFocus(new FocusNode());
}

@override
Widget build(BuildContext context) {

return new GestureDetector(
    onTap: () {
    this._dismissKeyboard(context);
    },
    child: new Container(
    color: Colors.white,
    child: new Column(
        children: <Widget>[/*...*/],
    ),
    ),
 );
}

2019-08-14 13:19:14

下面的代码帮助我隐藏键盘

   void initState() {
   SystemChannels.textInput.invokeMethod('TextInput.hide');
   super.initState();
   }

2019-05-28 12:44:25

如何解除屏幕上的键盘?

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