Smartphone being hacked

[AC Question]

A virus detected message popped up when I open Google search page. It then lead me to an app called Energy Protector to clear the virus. After I downloaded energy protector, it lead me to another power clean optimizer cleaner. After this I notice a strange my website named "gralapop. Pw" is screening my phone data. There are 2 buttons at the bottom of the page which requested me to install or remover. I didn't click any of the button and quickly closed the website. How can I check whether what data in my phone has been hacked? What should I do next? Thx.

 

[Rukbat]

Install Avast Mobile Security & Antivirus and Malwarebytes Anti-Malware (one at a time - let one finish running [which can take hours] before installing the other one).

If they don't clear up the virus (the "virus detector" was the first virus you downloaded), you'll have to reflash the phone's stock ROM and start again, loading apps and generating data, as if you'd just gotten the phone.