如何确定Textfield的高度？

问题描述

如您所见，高度是不同的。

左图显示了未弹出键盘时正在运行的应用程序。右图显示了当键盘弹出并单击“ Flutter Hot Reload”（Android Studio）时正在运行的应用程序。

我希望文本字段像右边的图片一样，没有弹出键盘。

我该如何解决？

应用栏

class CustomAppbar extends StatelessWidget with PreferredSizeWidget{
  @override
  final Size preferredSize;

  @override
  static double height = AppBar().preferredSize.height;

  CustomAppbar() : preferredSize = Size.fromHeight(height);

  @override
  Widget build(BuildContext context) {
    @override
    final double statusbarHeight = MediaQuery.of(context).padding.top;

    return Container(
      child: Stack(
        children: <Widget>[
          AppBar(
            backgroundColor: Colors.white,elevation: 0,iconTheme: IconThemeData(color: Colors.black,),Container(
            decoration: Boxdecoration(
                color: Colors.grey,borderRadius: BorderRadius.all(Radius.circular(10))
            ),margin: EdgeInsets.only(left: 60,top: statusbarHeight + 5,bottom: 5,right: 5),child: InputBox(),)
        ],);
  }
}

输入框

class InputBox extends StatefulWidget {
  @override
  _InputBoxState createState() => _InputBoxState();
}

class _InputBoxState extends State<InputBox> {
  TextEditingController _SearchController = TextEditingController();
  FocusNode _focusNode = FocusNode();
  String _SearchText = "";

  _InputBoxState(){
    _SearchController.addListener(() {
      setState((){
        _SearchText = _SearchController.text;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return TextField(
      focusNode: _focusNode,style: TextStyle(fontSize: 19),controller: _SearchController,decoration: Inputdecoration(
          hintText: "Search",border: InputBorder.none,prefixIcon: Icon(Icons.search,color: Colors.white,suffixIcon: _focusNode.hasFocus ? IconButton(
            icon: Icon(Icons.cancel,onpressed: (){
              setState((){
                _SearchController.clear();
                _SearchText = "";
                _focusNode.unfocus();
              });
            },) : Container()
      )
    );
  }
}

解决方法

  style:TextStyle(height: 20),//custome height
  decoration: InputDecoration(
  isDense: true)                    // remove padding inside textfield

如果要在文本字段内填充，可以使用ContentPadding