Android Grant Drawing Over Other Apps

Android Grant "Drawing over other apps"

Application like SpeedMeter, Assistive Touch may report error or issue about "Drawing over other apps"

You need ADB to grant "Drawing over other apps"

1. find out the package name of the app:
$ adb shell pm list packages

For examples:
com.tuanfadbg.assistivetouchscreenrecorder
visnkmr.apps.timenetspeed

2. grant access
$ adb appops set visnkmr.apps.timenetspeed SYSTEM_ALERT_WINDOW allow

Now you should be able to enable the SpeedMeter or the Assistive Touch apps.