小编Max*_*vit的帖子

我刚刚构建了一个反应应用程序，但出现此错误：

./src/index.js
Module not found: Can't resolve './serviceWorker' in 'I:\CODE\etiquettesynapsyreactapp\src'

我不知道如何解决它，我在谷歌上搜索是 ;) ！

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import Profile from './Profile';

import {BrowserRouter,Route } from "react-router-dom";
import * as serviceWorker from './serviceWorker';

ReactDOM.render( 
<React.StrictMode >
  <BrowserRouter >
    <div className = "App" >
    <Route path = "/" exact component = { App} /> 
    <Route path = "/Profile" exact component = { Profile}/> </div> 
  </BrowserRouter> 
  </React.StrictMode>,document.getElementById('root')
);

serviceWorker.unregister();

我尝试重新安装 serviceWorker，我看到的语法很好......我不知道！

请

我有一些问题,当我建立graddle ..我不明白问题在哪里,我读了很多关于那个,但我找不到解决方案..我已经:下载Repository,放入依赖关系和latest SDK version.

我试着CardView在HomeActivity.xml.我也有MyViewHolder.java,PageAdapter.java'MyObject.java所以..我需要一些帮助如果你想要其他文件,我已经制作了3个TabLayout.代码在MainActivity.java中.

Information:Gradle tasks [clean, :app:assembleDebug]
C:\...........\HomeActivity.java
Error:(16, 35) error: cannot find symbol class ActionBarActivity
Error:(26, 5) error: method does not override or implement a method from a supertype
Error:(28, 9) error: cannot find symbol variable super
Error:(29, 9) error: cannot find symbol method setContentView(int)
C:\Users\cozakk\AndroidStudioProjects\MaximeBodivitVisionApp\app\src\main\java\com\maximebodivit\maximebodivitvisionapp\PagerAdapter.java
Error:(21, 24) error: incompatible types: HomeActivity cannot be converted to Fragment
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; …