This project uses AndroidX dependencies, but the ‘android.useAndroidX‘ property is not enabled.
解决方案：
打开 gradle.properties
输入代码：
android.useAndroidX=true android.enableJetifier=true
点击 Sync now
Android Studio 4.0 ：This project uses AndroidX dependencies, but the 'android.useAndroidX' property is not enabled.
原文：https://www.cnblogs.com/hbuwyg/p/13084235.html
