Useful android spells...

  1. List your usb connected devices.

$ adb devices

List of devices attached

ZY225CWBFX             device

    or...

   adb devices -l

List of devices attached

ZY225CWBFX             device usb:1-1.1 product:payton_fi model:moto_x4 device:payton_sprout

 2. List focused app package name:

adb shell dumpsys window windows | grep -E 'mFocusedApp'| cut -d / -f 1 | cut -d " " -f 7

Useful for creating a list of frequently used apps. Allowing you to recognize what is putting something unusual up on your phone and maybe head off a problem. I created this list with the above command and a bit of vi editing...

com.google.android.apps.messaging       - text messaging

com.android.chrome                      - standard android web browser

com.google.android.apps.magazines       - googles maddening "news" feed

com.google.android.keep                 - google note taker

com.google.android.dialer               - manual dialer (call blocking)

com.motorola.camera2                    - camera UI

com.google.android.googlequicksearchbox - weather?

com.google.android.gm                   - gmail 

com.google.android.calendar             - google calendar

com.google.android.projection.gearhead  - android auto UI

com.google.android.contacts             - contacts app

com.android.settings                    - settings

com.android.vending                     - android play store

us.zoom.videomeetings                   - zoom meetings

com.motorola.launcher3                  - normal desktop launcher