You can lock screen by this App. Unlock by fingerprint for ROOT device！
NOTE：
This app require ROOT！
If your phone doesn't ROOT，reference my another Lock Screen app：
https://play.google.com/store/apps/details?id=g7.lockscreenrootless.completed
FEATURES：
You can lock screen by this app and unlock by fingerprint.
It's working on Home screen or Quick setting convenience！
ADVANTAGE：
· No advertisements
· No background services
· No any permissions
· Smail and Quick. Only 81KB！
· Support Android version 2.3~8.x
· Support System UI Tuner. Can add lock button on Quick setting（7.0+）
· Support Adaptive Icons（8.0+）
TARGET：
· Support Xposed. Can double tap status bar to lock.
If you have any suggestion. Welcom leave message or mail to me.
If you like this app. Give me five stars. It's my work power. Thank you very much！