Thank you for providing the exact steps. I was able to reproduce the issue in the Visual Studio Android emulator when I tried to deploy the same application for the second time.
I have also tested the scenario in Android Studio emulator and the faulty behavior did not appear there. This makes me think that it is only related to the Android emulator in VS.
Additionally, the error message:
means that, the deploying process cannot finish because the application is already installed on the device. This said, I was able to successfully install the application after uninstalling it from the emulator.
I logged this bug in our internal issue-tracking system. We will do our best to release a fix for it as soon as possible. Until that happens, you can use one of the following workarounds:
Please accept our sincere apologies for any inconvenience caused by this problem.
- Use the Android Studio emulator.
- Uninstall the application from the emulator every time before running the Build and Deploy option.
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