Use androidx.* artifacts option is disable in Android Studio when create new project

Question

When I create new project with Android Studio 3.4.1, can NOT uncheck "Use androidx.* artifacts".

user_3894512 · Answer

Uncheck Android 9.+(Q) under SDK Manager-> Apperance & Behavior-> System Setting-> Android SDK-> SDK Platforms

user_7902522 · Answer

delete the android-29 folder from AppData\Local\Android\Sdk\platforms it works for me

user_2234616 · Answer

Uninstall Android 9.+(Q) under SDK Manager -> Apperance & Behavior -> System Setting -> Android SDK -> SDK Platforms.

As well as delete android-29 folder from C:\Users\XXX\AppData\Local\Android\Sdk\platforms

Restart and Invalidate Android Studio.