android - ClassNotFoundException : Didn't find class "com.example.blogapp.whateverString"

Question

在我迁移 androidx 后，当我单击按钮时它会显示给我
为什么会这样？

当我点击按钮打开日历时我想要做什么

这是我单击按钮时的错误

  java.lang.ClassNotFoundException: Didn't find class "com.example.blogapp.whateverString" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.example.blogapp-BjDX

这是我的 Manifest.xml，其中 whatString 来自

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.together">
    <!--
         The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
         Google Maps Android API v2, but you must specify either coarse or fine
         location permissions for the 'MyLocation' functionality.
    -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <!-- 맵 이용하기 위함 -->
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <!-- 다음 지도 -->
    <uses-permission android:name="android.permission.INTERNET" /> <!-- 대략적인 위치 참조 권한 -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <!-- 정확한 위치 참조 권한 -->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.SEND_SMS" />
    <uses-permission android:name="android.permission.RECEIVE_SMS" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />

    <application
        tools:replace="android:appComponentFactory"
        android:appComponentFactory="whateverString"
        android:allowBackup="false"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        android:usesCleartextTraffic="true">

我用这两条线

tools:replace="android:appComponentFactory"
        android:appComponentFactory="whateverString"

因为我被添加在下面实现这些

    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'com.google.android.material:material:1.1.0-alpha07'
    implementation 'joda-time:joda-time:2.10.1'

我从这里看到有人推荐在 mycase 中发生错误时，使用以下代码

tools:replace="android:appComponentFactory"
        android:appComponentFactory="whateverString"

所以这就是我使用“WhateverString”的原因

我该如何解决这个问题？
我不明白为什么在我迁移 androidx 后突然向我显示错误

Answer 1

在 list 文件中，您添加了这一行

 android:appComponentFactory="whateverString"

但是类(class)找不到“whateverString”所以你必须删除

tools:replace="android:appComponentFactory"
        android:appComponentFactory="whateverString"

将这些行添加到 list 文件

android:requestLegacyExternalStorage="true"
 android:usesCleartextTraffic="true"
    tools:targetApi="p"