Block user from accessing certain sites

[AC Question]

This application will keep running in background. when a user tries to access a site from a browser( chrome, firefox, opera mini etc) on mobile device. the url will be validated from an online database. if the url is not present in database then user will be able to access it as it is else user will be redirected to page 404.
I am not sure if the application will have access to verify a url which is access from a different application. rooting the phone is not an option for me.

 

[B. Diddy]

Welcome to Android Central! Try something like Kiosk Browser Lockdown.

 

[Bishal Rai1]

The easiest way to do this is by using a kiosk locdown solution. It's a perfect solution for enterprises who use tablets as field devices, and want to ensure proper and effective use of devices. By blacklisting certain sites, you can not only guarantee workforce efficiency but also avoid users from misusing the device.
There are many well known kiosk lockdown solutions available in the market. Depeding upon your requirement and budget, yoiu can choose any one of them.

Hope this help!