send touch events to a device via adb [duplicate]

Android comes with an input command-line tool that can simulate miscellaneous input events.
To simulate a tap, use:

input tap x y

Run the input command remotely using adb shell:

adb shell input tap x y

Other options are:

shell@m0:/ $ input
input
usage: input ...
       input text <string>
       input keyevent <key code number or name>
       input [touchscreen|touchpad|touchnavigation] tap <x> <y>
       input [touchscreen|touchpad|touchnavigation] swipe <x1> <y1> <x2> <y2> [duration(ms)]
       input trackball press
       input trackball roll <dx> <dy>

To send touch event you need to do:

1. Set coordinates:

   adb shell sendevent /dev/input/event2 3 0 x
   adb shell sendevent /dev/input/event2 3 1 y
   

2. Send touch event (must have 0 0 0 pair):

   adb shell sendevent /dev/input/event2 1 330 1
   adb shell sendevent /dev/input/event2 0 0 0
   

3. Send release finger event (must have 0 0 0 pair):

   adb shell sendevent /dev/input/event2 1 330 0
   adb shell sendevent /dev/input/event2 0 0 0
   

Please note:

1. You can record events:

   adb shell getevent
   

2. If you use getevent all event values are in hex.