The best way to test the phonegap camera widget is using the mendix developer app for windows, apple and google.
This tutorial may help: https://world.mendix.com/display/howto50/Deploy+Your+First+Hybrid+Mobile+App
You can download the app from these links:
https://itunes.apple.com/gb/app/mendix-developer-app/id922423316?mt=8
https://play.google.com/store/apps/details?id=com.mendix.MendixDeveloperApp&hl=en
http://www.windowsphone.com/en-gb/store/app/mendixdeveloperapp/349d987a-dddb-4d1f-91e3-a3715ee0fc0e
When I run it in the developer app i get the following error:
"Could not create widget CameraWidgetForPhoneGap.widget.CameraWidgetForPhoneGap: Error: Invalid Template"