adb shell input keyevent [--longpress] <key code number or name>
Control Keypress events on Android
adb shell input keyevent 187
KEYCODE_APP_SWITCH
adb shell input keyevent 3
KEYCODE_HOME
adb shell input keyevent 84
KEYCODE_SEARCH
adb shell input keyevent 219
KEYCODE_ASSIST
adb shell input keyevent 231
Voice Assist key
adb shell input keyevent 5
KEYCODE_CALL
adb shell input keyevent 6
KEYCODE_ENDCALL
adb shell input keyevent 7
KEYCODE_0
adb shell input keyevent 16
KEYCODE_9
adb shell input keyevent 29
KEYCODE_A
adb shell input keyevent 54
KEYCODE_Z
adb shell input keyevent 66
KEYCODE_ENTER
adb shell input keyevent 67
KEYCODE_DEL
adb shell input keyevent 24
KEYCODE_VOLUME_UP
adb shell input keyevent 25
KEYCODE_VOLUME_DOWN
adb shell input keyevent 164
toggle MUTE the speaker
adb shell input keyevent 91
toggle MUTE the microphone
adb shell input keyevent --longpress 26
Long PRESS power key
adb shell input keyevent 26
KEYCODE_POWER
adb shell input keyevent 27
KEYCODE_CAMERA
adb shell input keyevent 223
Lock screen.
adb shell input keyevent 224
Wakes up the device.