About Black & Lock Screen
You may find this kind of situation; you want to listen to some musics, but the musics you want to listen are only available in Youtube (or other video form players), so you have to turn the screen on all the time; also, have to careful about your screen so that it isn't accidentally touched.
If you met above situation, this App would be helpful.
This App is made for black out the screen and disable touch function of you screen (navigation bar, such as home button, and status bar, on the top of screen where time, and Wifi status shows, are still touchable)
For some Android version (such as above 6.0), you may need to agree some permissions in you first run.
This App is simple to use, the control UI is on status bar (slide down from top of the screen), and there are three buttons.
1.Start: black out and lock part of touch function of the screen, and set brightness value to lowest
2.Stop: turn screen back to original color and brightness; also, enable touch screen, but not close the App
3.Close: turn screen back to original color and brightness; also, enable touch screen, then close the App
Now, you can listen what you want from video with black screen, and you can put it into your pocket without worrying about the interruption about your video by accidental touch.