execute the following command to insert the text into a view with a focus (if it supports text input)

Send text on SDK 23+

adb shell "input keyboard text 'Paste text on Android Device'"

If already connected to your device via adb:

input text 'Paste text on Android Device'

Send text prior to SDK 23

adb shell "input keyboard text 'Paste%stext%son%sAndroid%sDevice'"

Spaces are not accepted as the input, replace them with %s.

Send events

To simulate pressing the hardware power key

adb shell input keyevent 26

or alternatively

adb shell input keyevent POWER

Even if you don’t have a hardware key you still can use a keyevent to perform the equivalent action

adb shell input keyevent CAMERA

Send touch event as input

adb shell input tap Xpoint Ypoint

Send swipe event as input

adb shell input swipe Xpoint1 Ypoint1 Xpoint2 Ypoint2 [DURATION*]

*DURATION is optional, default=300ms. source