Flutter 的 Dialog被键盘遮挡

问题：

Flutter 的 Dialog被键盘遮挡，如何解决？

解决方法：

尝试使用 FullScreenDialog，下面是示例代码：

import 'package:flutter/material.dart';


void main() {
  runApp(new MaterialApp(home: new MyApp(),));
}

class MyApp extends StatefulWidget {
  @override
  MyAppState createState() => new MyAppState();
}

class MyAppState extends State<MyApp> {
  FullScreenDialog _myDialog = new FullScreenDialog();

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
        appBar: new AppBar(
          title: new Text("Fill this form"),
        ),
        body: new Column(
          children: <Widget>[
            new TextField(controller: new TextEditingController(
                text: "Add a single text field"),),

            new Card(child: new ListTile(
              title: new Text("Click to add your top 3 amazing skills"),
              subtitle: new Text(
                  "${_myDialog._skillOne} ${_myDialog._skillTwo} ${_myDialog
                      ._skillThree}"),
              onTap: () {
                Navigator.push(context, new MaterialPageRoute(
                  builder: (BuildContext context) => _myDialog,
                  fullscreenDialog: true,
                ));
              },
            ),
            ),
          ],
        )
    );
  }

}


class FullScreenDialog extends StatefulWidget {
  String _skillOne = "You have";
  String _skillTwo = "not Added";
  String _skillThree = "any skills yet";

  @override
  FullScreenDialogState createState() => new FullScreenDialogState();
}

class FullScreenDialogState extends State<FullScreenDialog> {
  TextEditingController _skillOneController = new TextEditingController();
  TextEditingController _skillTwoController = new TextEditingController();

  TextEditingController _skillThreeController = new TextEditingController();

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
        appBar: new AppBar(
          title: new Text("Add your top 3 skills"),
        ),
        body: new Padding(child: new ListView(
          children: <Widget>[
            new TextField(controller: _skillOneController,),
            new TextField(controller: _skillTwoController,),
            new TextField(controller: _skillThreeController,),
            new Row(
              children: <Widget>[
                new Expanded(child: new RaisedButton(onPressed: () {
                  widget._skillThree = _skillThreeController.text;
                  widget._skillTwo = _skillTwoController.text;
                  widget._skillOne = _skillOneController.text;
                  Navigator.pop(context);
                }, child: new Text("Save"),))
              ],
            )
          ],
        ), padding: const EdgeInsets.symmetric(horizontal: 20.0),)
    );
  }


}