Interpretation of the result of “cat /proc/bus/input/devices” and adb shell commands

Question

I\'m unsure if the question about injecting events via adb is supposed to be in StackOverflow or Android Enthusiasts, please move it if it doesn\'t belong here.

Anyw

Answer 1

The 1 "in-between /dev/input/event3/ and 116" stands for EV_KEY event type constant:

• EV_KEY: Used to describe state changes of keyboards, buttons, or other key-like devices.

You could have found that on your own if you had run getevent -l /dev/input/event3/ and pressed the power key.

Also to find out the power key input device name I would recommend parsing output of getevent -pl instead of contents of /proc/bus/input/devices. The device you are looking for has KEY_POWER listed in the events section:

add device X: /dev/input/eventX
  name:     "xxxxxxxxxx"
  events:
    KEY (0001): KEY_POWER

And the proper long power key press sequence (as in press and hold for 1 second and then release) would be:

sendevent /dev/input/eventX 1 116 1
sendevent /dev/input/eventX 0 0 0
sleep 1
sendevent /dev/input/eventX 1 116 0
sendevent /dev/input/eventX 0 0 0

Note: getevent -pl is not available for Gingerbread and below.