// AlertDialog 、SimpleDialog、showModalBottomSheet、showToast

// 使用showToast安装插件 https://pub.dev/packages/fluttertoast
 Fluttertoast.showToast( msg: "This is Short Toast", toastLength: Toast.LENGTH_SHORT, timeInSecForIos: 1);

import 'package:flutter/material.dart';
import 'myDialog.dart';

class DialogPage extends StatefulWidget{
  DialogPage({Key key});
  _Dialog createState() => _Dialog();
}

class _Dialog extends State {
  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return Scaffold(
        appBar: AppBar(
            title: Text('Dialog')
        ),
        body: ListView(
          children: <Widget>[
            RaisedButton(
              child: Text('AlertDialog'),
              onPressed: () {
                showDialog(
                  context: context,
                  builder: (context) {
                    return AlertDialog(
                      title: Text('提示'),
                      content: Text('确定要取消吗'),
                      actions: <Widget>[
                        FlatButton(child: Text('取消'), onPressed: () {Navigator.pop(context, '222');},),
                        FlatButton(child: Text('确定'), onPressed: () {Navigator.pop(context, '222');},),
                      ],
                    );
                  }
                );
              },
            ),
            RaisedButton(
              child: Text('弹出选择卡'),
              onPressed: () {
                showDialog(
                    context: context,
                    builder: (context) {
                      return SimpleDialog(
                        title: Text('选择卡'),
                        children: <Widget>[
                          SimpleDialogOption(child: Text('A'), onPressed: () { Navigator.pop(context);},),
                          SimpleDialogOption(child: Text('B'), onPressed: () { Navigator.pop(context);},),
                          SimpleDialogOption(child: Text('C'), onPressed: () { Navigator.pop(context);},),
                        ],
                      );
                    }
                );
              },
            ),
            RaisedButton(
              child: Text('弹出自定义'),
              onPressed: () {
                showDialog(
                    context: context,
                    builder: (context) {
                      return MyDialog(title:"关于我们", content:"关于我们");
                    }
                );
              },
            )
          ],
        )
    );
  }
}

// 自定义dialog
import 'dart:async';

import 'package:flutter/material.dart';
//MyDialog(title:"关于我们", content:"关于我们"); 引入文件 然后调用方法

class MyDialog extends Dialog {
  String title;
  String content;

  MyDialog({this.title="",this.content=""});

  _showTimer(context){
    var timer;
    timer = Timer.periodic(
        Duration(milliseconds: 3000), (t) {

      print('关闭');
      Navigator.pop(context);
      t.cancel();   //取消定时器   timer.cancel();
    });
  }

  @override
  Widget build(BuildContext context) {

    _showTimer(context);

    // TODO: implement build
    return Material(
      type: MaterialType.transparency,
      child: Center(
          child: Container(
            height: 300,
            width: 300,
            color: Colors.white,
            child: Column(
              children: <Widget>[
                Padding(
                  padding: EdgeInsets.all(10),
                  child: Stack(
                    children: <Widget>[
                      Align(
                        alignment: Alignment.center,
                        child: Text("${this.title}"),
                      ),
                      Align(
                        alignment: Alignment.centerRight,
                        child: InkWell(
                          child: Icon(Icons.close),
                          onTap: (){
                            Navigator.pop(context);
                          },
                        ),
                      )
                    ],
                  ),
                ),
                Divider(),
                Container(
                  padding: EdgeInsets.all(10),
                  width: double.infinity,
                  child: Text("${this.content}",textAlign: TextAlign.left),
                )
              ],
            ),

          )),
    );
  }
}