当我单击主页（main.dart）上的文本字段时，这是颤振给出的默认飞镖。当软键盘出现时我可以看到一个小故障，并且当软键盘消失时没有延迟。我在下面附上了这个案例的 gif。
void main() {
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
statusBarColor: primaryColor, //blue
statusBarIconBrightness: Brightness.dark,
));
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
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.pink,
primaryColor: primaryColor,
primaryColorBrightness: Brightness.dark,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
// This widget is the home page of your application. It is stateful, meaning
// that it has a State object (defined below) that contains fields that affect
// how it looks.
// This class is the configuration for the state. It holds the values (in this
// case the title) provided by the parent (in this case the App widget) and
// used by the build method of the State. Fields in a Widget subclass are
// always marked "final".
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
// setState(() {
// // This call to setState tells the Flutter framework that something has
// // changed in this State, which causes it to rerun the build method below
// // so that the display can reflect the updated values. If we changed
// // _counter without calling setState(), then the build method would not be
// // called again, and so nothing would appear to happen.
// _counter++;
// });
setState(() {
Navigator.push(
context,
MaterialPageRoute(builder: (context) => PhoneAuth()));
});
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
backgroundColor: Colors.red,
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text('hell0000000'),
),
body: Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: Container(
color: Colors.white,
child: ListView(
children: [
Column(
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
SizedBox(
height: 200,
),
Align(
alignment: Alignment.bottomCenter,
child: new Container(
child: TextField(
decoration: new InputDecoration(
hintText: 'Chat message',
),
),
),
),
],
),
],
),
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
main.dart 故障
此外，当我单击另一页（UserChatView.dart）上的文本字段时。当软键盘出现和消失时，我可以看到一个小故障。在这个 dart 文件中，两个动作（键盘打开和关闭）都发生了故障。我在下面附上了这个案例的 gif。
class UserChatView extends StatelessWidget{
@override
Widget build(BuildContext context) {
return UserChatViewPage();
}
}
class UserChatViewPage extends StatefulWidget {
UserChatViewPage({Key key}) : super(key: key);
@override
_UserChatViewPageState createState() => _UserChatViewPageState();
}
class _UserChatViewPageState extends State<UserChatViewPage> {
final TextEditingController _textController = new TextEditingController();
@override
Widget build(BuildContext context) {
final focus = FocusNode();
return new Scaffold(
backgroundColor: Colors.red, // Scaffold background Color
appBar: new AppBar(
title: Row(
children: <Widget>[
// new Container(
// child: CircleAvatar(
// backgroundImage: AssetImage("assets/male_icon.png"),
// )
// ),
new SizedBox(
width: 5.00,
),
new Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget> [
new Container(
child: new Text("Alex Marko",
style: TextStyle(color: Colors.white,
fontFamily: 'Roboto_Bold',
letterSpacing: 1.00
),
),
),
new Container(
child: new Text("Online",
style: TextStyle(color: Colors.white,
fontFamily: 'Roboto_Medium',
letterSpacing: 1.00,
fontSize: 12.00,
),
),
),
],
),
],
),
centerTitle: false,
titleSpacing: 0.0,
backgroundColor: primaryColor,
elevation: 0.0,
bottomOpacity: 0.0,
actions: <Widget>[
IconButton(
icon: Icon(
Icons.expand_more_rounded,
color: Colors.white,
),
onPressed: () {
// do something
},
),
],
),
body: Center(
child: new Container(
color: Colors.grey,
child: new Column(
children: <Widget>[
new Expanded(
child: _PageListView(),
),
new Container(
color: Colors.yellow,
padding: new EdgeInsets.all(10.0),
child: _buildTextComposer(),
),
],
),
),
),
);
}
Widget _buildTextComposer() {
return new Container(
color: Colors.yellow,//modified
margin: const EdgeInsets.symmetric(horizontal: 8.0),
child: new Row(
children: <Widget>[
new Flexible(
child: new TextField(
controller: _textController,
onSubmitted: _handleSubmitted,
decoration: new InputDecoration.collapsed(
hintText: "Send a message"),
),
),
new Container(
margin: new EdgeInsets.symmetric(horizontal: 4.0),
child: new IconButton(
icon: new Icon(Icons.send),
onPressed: () => _handleSubmitted(_textController.text)),
),
],
),
);
}
Widget _PageListView(){
return new Container(
child: ListView.builder(
reverse: true,
itemCount: 20,
itemBuilder: (context, position) {
return Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Text(position.toString(), style: TextStyle(fontSize: 22.0),),
),
);
},
),
);
}
UserChatView.dart Glich
