问我想在我的颤振应用程序中添加firebase，但是当我设置它时，VS代码中有很多错误

EN

我在youtube https://www.youtube.com/watch?v=LnpGU8vj7TI上学习了本教程，以便用颤振来设置火底，而当我试图运行main.dart文件时，就像他那样做了之后，在我的终端上显示了很多错误。

import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';

void main() async{
  WidgetsFlutterBinding().ensureVisualUpdate();
  await Firebase.initializeApp();
  runApp(My_pp());
}

class My_pp extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    // TODO: implement createState
    return My_ppstate();
  }
}

class My_ppstate extends State<My_pp> {
  
 
  Widget build(BuildContext context) {
    
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('hello'),
          backgroundColor: Color.fromARGB(50, 255, 255, 5),
        ),
       
            
      ),
    );
  }
}

这些错误是

lib/main.dart:警告:将其解释为包URI，' package :led_blink/main.dart‘。/D:/flutter_windows_2.0.3-stable/flutter/packages/flutter/lib/src/material/animated_icons.dart:9:8:错误:未找到：“dart: ui”导入'dart:ui‘，ui显示画图、路径、画布；^ /D:/flutter_windows_2.0.3-stable/flutter/packages/flutter/lib/src/material/animated_icons.dart:10:8:错误:未找到：'dart:ui’导入'dart:ui‘显示lerpDouble；^ /D:/flutter_windows_2.0.3-stable/flutter/packages/flutter/lib/src/material/app.dart:5:8:错误:未找到：'dart:ui‘导入'dart:ui’作为ui；^ /D:/flutter_windows_2.0.3-stable/flutter/packages/flutter/lib/src/material/app_bar_theme.dart:5:8:错误:未找到：'dart:ui‘导入'dart:ui’显示lerpDouble；^ /D:/flutter_windows_2.0.3-stable/flutter/packages/flutter/lib/src/material/arc.dart:6:8:错误:未找到：“dart:ui”导入'dart:ui‘显示lerpDouble；^ /D:/flutter_windows_2.0.3-stable/flutter/packages/flutter/lib/src/material/bottom_app_bar_theme.dart:5:8:错误:未找到：'dart:ui’导入'dart:ui‘显示lerpDouble；^ /D:/flutter_windows_2.0.3-stable/flutter/packages/flutter/lib/src/material/bottom_navigation_bar_theme.dart:5:8:错误:未找到：“dart:ui”导入'dart:ui‘显示lerpDouble；^ /D:/flutter_windows_2.0.3-stable/flutter/packages/flutter/lib/src/material/bottom_sheet.dart:5:8:错误:未找到：'dart:ui’导入'dart:ui‘显示lerpDouble；^ /D:/flutter_windows_2.0.3-stable/flutter/packages/flutter/lib/src/material/bottom_sheet_theme.dart:5:8:错误:未找到：'dart:ui‘

导入'dart:ui‘显示lerpDouble；^lerpDouble:未找到：'dart:ui’导入'dart:ui‘显示lerpDouble；

这是颤栗的医生--详细的结果：

来自android文件夹的build.gradle

应用程序文件夹中的build.gradle

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