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


});

为了专注于键盘在BottomSheet - Wrap TextField在Padding Widget如下:

showModalBottomSheet(
              context: context,
              builder: (context) {
                return Container(
                  child: Padding(
                    padding: EdgeInsets.only(
                        bottom: MediaQuery.of(context).viewInsets.bottom),
                    child: TextField(
                      autofocus: true,
                    ),
                  ),
                );
              }); 

在结合不同的解决方案后，我得到了这个:

如果你不想全屏，也不想使用填充

  showModalBottomSheet(
      context: context,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      enableDrag: true,
      isDismissible: true,
      useRootNavigator: true,
      builder: (BuildContext ctx) {
        return Scaffold( // use CupertinoPageScaffold for iOS
          backgroundColor: Colors.transparent,
          resizeToAvoidBottomInset: true, // important
          body: SingleChildScrollView(
            child: Form(
              child: Container(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: <Widget>[
                    TextFormField(),
                    TextFormField(),
                  ],
                ),
              ),
            ),
          ),
        );
      },
    );

在Flutter(通道母版，v1.15.3-pre。37，适用于Mac OS X 10.15.2 19C57, locale en-US)

给那些不能解决问题的人尝试所有的答案。这些答案是正确的，但不太清楚。

当使用

MediaQuery.of(上下文).viewInsets.bottom)

make sure your context variable is using the one provided by bottom sheet builder property.

c builder:(* * * *) = > MediaQuery.of (c * * * *)

要修复此问题

你所需要的就是使用MediaQuery.of(context).viewInsets.bottom填充键盘 为了更保险，设置底部表格对话框的isScrollControlled = true，这将允许底部表格获得所需的全部高度。

请注意

如果您的BottomSheetModel是Column，请确保添加mainAxisSize: mainAxisSize。Min，否则床单会覆盖整个屏幕。 工作与多个TextField或TextFormField

例子

showModalBottomSheet(
        shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.vertical(top: Radius.circular(25.0))),
        backgroundColor: Colors.black,
        context: context,
        isScrollControlled: true,
        builder: (context) => Padding(
          padding: EdgeInsets.only(
                        bottom: MediaQuery.of(context).viewInsets.bottom),
          child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 12.0),
                    child: Text('Enter your address',
                        style: TextStyles.textBody2),
                  ),
                  SizedBox(
                    height: 8.0,
                  ),
                  TextField(
                      decoration: InputDecoration(
                        hintText: 'adddrss'
                      ),
                      autofocus: true,
                      controller: _newMediaLinkAddressController,
                    ),
                  

                  SizedBox(height: 10),
                ],
              ),
        ));

请注意:

shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(25.0))),

这不是必须的。只是我要创建一个圆形的底页。

更新

Flutter 2.2又打破了改动!”现在你需要再次给底部填充，这样键盘就不会重叠在底部。

包:https://pub.dev/packages/modal_bottom_sheet

将小部件包装到Padding中，并像这样设置Padding ==>

padding: MediaQuery.of(context).viewInsets // viewInsets will decorate your screen

你可以使用 showMaterialModalBottomSheet或showModalBottomSheet或showCupertinoModalBottomSheet

showModalBottomSheet(
        context: context,
        barrierColor: popupBackground,
        isScrollControlled: true, // only work on showModalBottomSheet function
        shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.only(
                topLeft: Radius.circular(borderRadiusMedium),
                topRight: Radius.circular(borderRadiusMedium))),
        builder: (context) =>  Padding(
            padding: MediaQuery.of(context).viewInsets,
            child: Container(
                   height: 400, //height or you can use Get.width-100 to set height
                   child: <Your Widget here>
             ),)),)