小编Alb*_*rge的帖子

我正在尝试使用底部的浮动操作按钮创建一个简单的待办事项应用程序，单击该按钮时会显示警报对话框以将项目添加到列表中。每次单击按钮时，键盘都会向上推操作按钮，导致错误溢出。有没有办法避免在键盘打开时向上推操作按钮？这是我拍摄的快照： 源代码下方的快照：

import 'package:flutter/material.dart';
import '../model/todo_item.dart';

class ToDoScreen extends StatefulWidget {
  @override
  _ToDoScreenState createState() => _ToDoScreenState();
}

class _ToDoScreenState extends State<ToDoScreen> {
  TextEditingController _textEditingController = TextEditingController();
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.blueAccent,
      body: Column(
        children: <Widget>[ToDoItem("Going for a Walk", "12 January, 2019")],
      ),
      floatingActionButton: FloatingActionButton(
        tooltip: 'Add Item',
        child: Icon(Icons.add),
        backgroundColor: Colors.red,
        onPressed: _showFormDialog,
      ),
    );
  }

  void _showFormDialog() {
    var alert = AlertDialog(
      content: Row(
        children: <Widget>[
          Expanded(
            child: TextField(
              controller: _textEditingController,
              autofocus: true, …