The following error occurs when a data line connected Android Studio installation APP:
Error: Activity class {...Activity} does not exist
Error while Launching activity
The reason: because the android studio think your project is running on the phone, but you put him uninstall, and it naturally does not know, thus giving rise to this case.
solution:
Uninstall using the command adb com.xx.xxx.xxx (package name) uninstall apk, then reinstall
View command adb related: https://www.cnblogs.com/lkc9/p/11238451.html