更新2021年5月扑动2.2! 现在你需要给底部填充。下面写的是一个错误。

更新2020 !

这个答案是正确的，但是你现在不需要给底部填充! 找到并删除这一行:

填充:MediaQuery.of .viewInsets(上下文)

添加:

isScrollControlled: true表示showModalBottomSheet 填充:MediaQuery.of(上下文)。viewInsets为生成器中的小部件 列/换行都可以

showModalBottomSheet<void>(
  isScrollControlled: true,
  context: context,
  shape: RoundedRectangleBorder(
    borderRadius: BorderRadius.only(
        topLeft: Radius.circular(30.0),
        topRight: Radius.circular(30.0)),
  ),
  builder: (BuildContext context) {
    return Padding(
        padding: MediaQuery.of(context).viewInsets,
        child: Container(
            child: Wrap(
          children: <Widget>[
            TextField(
              decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'Enter a search term'),
            ),
            TextField(
              decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'Enter a search term'),
            ),
            TextField(
              decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'Enter a search term'),
            ),
            TextField(
              decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'Enter a search term'),
            )
          ],
        )));
  },
);

更新2020年2月25日更好的解决方案

showModalBottomSheet(
 isScrollControlled: true,
 builder: (BuildContext context) {

    return SingleChildScrollView(
      child: Container(
        padding:
            EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
        child: Padding(
          padding: const EdgeInsets.fromLTRB(20.0, 20.0, 20.0, 0.0), // content padding
          child: Form(...)) // From with TextField inside


});

把它添加到你的底页的最后一个小部件之后

Padding(padding: EdgeInsets.only(bottom:MediaQuery.of(context).viewInsets.bottom))

你应该用这个，

showModalBottomSheet(
    isScrollControlled: true,
    context: context,
    shape: RoundedRectangleBorder(
      // <-- for border radius
      borderRadius: BorderRadius.only(
        topLeft: Radius.circular(10.0),
        topRight: Radius.circular(10.0),
      ),
    ),
    builder: (BuildContext context) {
      return SingleChildScrollView(
        padding:
            EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
        child: drunkenWidget()...

//BTW, Never ever Drink

我通过增加打开键盘时子部件的高度来解决这个问题。 MediaQuery.of(context). viewinsets的初始值。底部为0，当键盘聚焦时它会改变。

showModalBottomSheet<void>(
      enableDrag: true,
      isScrollControlled: true,
      context: context,
      builder: (BuildContext context) {
        return Card(
          color: Colors.white,
          child: Container(
            height: MediaQuery.of(context).size.height / 2 +
                MediaQuery.of(context).viewInsets.bottom,
            child: Column(
              children: <Widget>[
                TextField(),
                TextField(),
              ],
            ),
          ),
        );
      },
    );

import 'dart:async'; import 'dart:ui'; import 'package:flutter/foundation.dart'; import 'package:flutter/widgets.dart'; import 'package:flutter/material.dart'; import '../weight/boostrap/flutter_bootstrap.dart'; import '../weight/boostrap/bootstrap_widgets.dart'; /* TextEditingController txtname = TextEditingController(); showModalBottomSheet( context: context, isScrollControlled: true, shape: const RoundedRectangleBorder( borderRadius: BorderRadius.only( topLeft: Radius.circular(20), topRight: Radius.circular(20), ), ), builder: (context) => SingleChildScrollView( padding: EdgeInsets.only( bottom: MediaQuery.of(context).padding.bottom), child: new AddItem( tektk: 'Category', tektd: 'Add', txtname: txtname, ismultik:false, onPressed: () {}), ), ); */ class AddItem extends StatelessWidget { const AddItem( {Key? key, required this.ismultik, required this.tektd, required this.tektk, required this.txtname, required this.onPressed}) : super(key: key); final bool ismultik; final String tektk; final String tektd; final VoidCallback? onPressed; final TextEditingController txtname; @override Widget build(BuildContext context) { final MediaQueryData mediaQueryData = MediaQuery.of(context); bootstrapGridParameters(gutterSize: 10); return Padding( padding: mediaQueryData.viewInsets, child: Container( padding: EdgeInsets.only(bottom: 90.0, left: 10.0, right: 10.0), child: Column( crossAxisAlignment: CrossAxisAlignment.stretch, mainAxisAlignment: MainAxisAlignment.spaceBetween, children: [ ListTile( trailing: SizedBox.fromSize( size: Size(35, 35), child: ClipOval( child: Material( color: Colors.indigo, child: InkWell( splashColor: Colors.white, onTap: () { Navigator.pop(context); }, child: Column( mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ Icon(Icons.close, color: Colors.white), ], ), ), ), ), ), ), BootstrapRow(height: 0, children: [ BootstrapCol( sizes: 'col-md-12', child: TextField( style: TextStyle(color: Colors.black), decoration: new InputDecoration( border: new OutlineInputBorder( borderSide: new BorderSide(color: Colors.white)), labelText: tektk, ), keyboardType: ismultik == true ? TextInputType.multiline : TextInputType.text, maxLines: null, minLines: 1, controller: txtname, ), ), BootstrapCol( sizes: 'col-md-12', child: ElevatedButton( style: ElevatedButton.styleFrom( primary: Colors.green, // background onPrimary: Colors.white, // foreground ), onPressed: onPressed, child: Text(tektd)), ), ]), ], ), ), ); } }