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16 January 2018

Error type 3: Activity class does not exist

This happens when you do the following
  • connect your device/emulator
  • run the app from Android Studio (AS)
  • use/test the app and uninstall it from the device while it is still connected to your computer
  • try to run the app again from AS
AS thinks you still have the app in your device.
tl;dr - To resolve this issue for connected devices you can uninstall with ADB:
$ adb shell pm list packages
package:com.foo.foo

$ adb uninstall com.foo.foo
Success

Run app from AS again after uninstalling with ADB.

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