Error: there were deployment errors

Question

When I tried to run any sample application or a new one it shows this error. Can anyone help please?

Answer 1

The error is telling you that you have not selected a device:

"Please select a valid device before running the application"

You need to choice a physical phone (or Android emulator) to deploy the application to.

Ref: Debug on Device

Answer 2

you have to have the android virtual device downloaded.

here are a few options:

• Xamarin Android player
• Bluestacks
• Andy
• Genymotion

Now that you have the virtual device. you need to start one before you run or debug.

The specific error you are seeing is because you've not started the device properly before you debug, you should be able to see the device.

Now run the project, and you wont meet this error.