mobileCyberGamesApp/lib/widget/Dialog.dart

import 'package:flutter/material.dart';

//  void showSuccess(text) {

//   }
void showCustomDialog(context, text, {String title, bool isCancel = false, String submitText = '确认', OnTapHomeMenu onsubmit, OnTapHomeMenu oncancel}) {
  Navigator.of(context).push(
    PageRouteBuilder(
      opaque: false,
      transitionDuration: Duration(milliseconds: 300),
      transitionsBuilder: (BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation, Widget child) {
        return FadeTransition(
          opacity: CurvedAnimation(parent: animation, curve: Curves.linear),
          child: child,
        );
      },
      pageBuilder: (BuildContext context, _, __) {
        return LoadingDialog(title: title, text: text, submitText: submitText, cancel: isCancel, onsubmit: onsubmit, oncancel: oncancel);
      },
    ),
  );
}

typedef OnTapHomeMenu = void Function();

// ignore: must_be_immutable
class LoadingDialog extends Dialog {
  String title;
  String text;
  String submitText;
  bool cancel = false;
  OnTapHomeMenu onsubmit = () {};
  OnTapHomeMenu oncancel = () {};

  LoadingDialog({Key key, @required this.text, this.cancel, this.onsubmit, this.oncancel, this.title, this.submitText}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      child: Scaffold(
        backgroundColor: Color(0xb3000000),
        body: Container(
          child: SizedBox.expand(
            child: UnconstrainedBox(
              child: Container(
                width: 270,
                // padding: EdgeInsets.symmetric(horizontal: 20, vertical: 25),
                decoration: BoxDecoration(color: Color(0xE6293559), border: Border.all(width: 1, color: Color(0xFF1990F8))),
                child: Stack(
                  children: <Widget>[
                    Padding(
                      padding: EdgeInsets.symmetric(horizontal: 20, vertical: 25),
                      child: Column(
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: <Widget>[
                          Text(title ?? '提示', style: TextStyle(color: Colors.white, fontSize: 18, fontWeight: FontWeight.bold)),
                          Container(
                            height: 20,
                          ),
                          Text(text, style: TextStyle(color: Colors.white, fontSize: 14), textAlign: TextAlign.center),
                          Container(
                            height: 30,
                          ),
                          cancel
                              ? Row(
                                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                  children: <Widget>[
                                    Container(
                                      width: 100,
                                      child: RaisedButton(
                                        color: Color(0xFF3A3D5C),
                                        highlightColor: Color(0xFF3A3D5C).withOpacity(0.8),
                                        textColor: Colors.white,
                                        child: Text('取消'),
                                        onPressed: () {
                                          Navigator.of(context).pop();
                                          oncancel();
                                        },
                                      ),
                                    ),
                                    Container(
                                      width: 100,
                                      child: RaisedButton(
                                        textColor: Colors.white,
                                        child: Text(submitText),
                                        onPressed: () {
                                          Navigator.of(context).pop();
                                          onsubmit();
                                        },
                                      ),
                                    )
                                  ],
                                )
                              : Container(
                                  width: double.infinity,
                                  child: RaisedButton(
                                    textColor: Colors.white,
                                    child: Text(submitText),
                                    onPressed: () {
                                      Navigator.of(context).pop();
                                      onsubmit();
                                    },
                                  ),
                                ),
                          Container(
                            height: 5,
                          )
                        ],
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),
        ),
      ),
      onWillPop: () {
        return Future.value(false);
      },
    );
  }
}