This is an example application of a webview that fires an intent with URL parameter as an extra to redirect to a site within a webview client. Please feel free to use this application to perform demo of vulnerable webview attacks.
If you want the source code, please message me on LinkedIn: https://www.linkedin.com/in/harshit-rajpal-79bb43103/
Will be uploading a sample exploit of this soon. Writeups could be found on hackingarticles.in