您可以尝试将“切换”微件 Package 在“容器”中

Container(
  height: 20,
  width: 50,
  child: Switch(
   value: _value,
   onChanged: (value){
    setState((){
      _value = value
    });
   }
  )
);

要从Switch小部件中删除填充，您需要将materialTapTargetSize设置为shrinkWrap。

Switch(
  materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
  onChanged: (bool value) {},
)

SizedBox(
  width: 50,
  height: 20,
  child: Switch(
  materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
  value: value,
  onChanged: (bool newvalue) {
    onChangeMethod(newvalue);
  },
  activeTrackColor: Colors.grey,
  activeColor: Colors.black,
  ),
);

您应该用SizedBox Package Switch，并设置宽度和高度。

我们可以使用带有约束的Container来设置maxHeight

Container(
                constraints: const BoxConstraints(maxHeight: 5.0),
                child: Switch(
                  materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
                  value: true,
                  activeColor: kAccentColor,
                  onChanged: (p0) => p0,
                ),
              ),