If you have an Android cell phone or tablet device, be careful what apps you install. The “Adult Player” app (known by other names as well) lures victims by promising pornographic video. When the victim starts using it, the app silently takes a compromising photo of the victim, which is then displayed on the screen, along with a ransom message. The app demands a ransom of $500 (£326) to be paid via PayPal. The ransom screen is designed to stay persistent even if you reboot your phone. It does not allow you to operate your device and keeps the screen active with ransom message.
You can find dozens of articles about this ransomware Android virus by starting at https://goo.gl/OCVKie.