在引入 库文件时候，AS报错
Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91 is also present at [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory). Suggestion: add ‘tools:replace="android:appComponentFactory"‘ to <application> element at AndroidManifest.xml:5:5-20:19 to override.
各种 尝试后，发现 原来 AS早已经给出提示
在清单文件 添加如下代码
<application ... android:theme="@style/AppTheme" android:appComponentFactory="" tools:replace="android:appComponentFactory">
原文：https://www.cnblogs.com/qiuniao/p/12191467.html