CODEWITHSUNDEEP
androidlinuxbashshellbatch-file
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Reputation: 13645

ADB shell sendevents not working

I am trying to simulate keypresses in my android device using getevent/sendevent mechanism. I see one of the batch file that is working. so I know the adb shell sendevent mechanism works.

So I did adb shell Getvent and did some keypresses, which gave me events which look like following:

/

dev/input/event0 0003 0039 0000006c
 /dev/input/event0 0001 014a 00000001
 /dev/input/event0 0001 0145 00000001
 /dev/input/event0 0003 0035 000003f8
 /dev/input/event0 0003 0036 00000153
 /dev/input/event0 0003 0030 00000001
 /dev/input/event0 0003 0031 00000000
 /dev/input/event0 0000 0000 00000000
 /dev/input/event0 0001 014a 00000000
 /dev/input/event0 0001 0145 00000000
 /dev/input/event0 0000 0000 00000000
 /dev/input/event0 0003 0039 0000006d
 /dev/input/event0 0001 014a 00000001
 /dev/input/event0 0001 0145 00000001
 /dev/input/event0 0003 0035 00000278
 /dev/input/event0 0003 0036 0000022c
 /dev/input/event0 0003 0030 00000004
 /dev/input/event0 0003 0031 00000004
 /dev/input/event0 0000 0000 00000000
 /dev/input/event0 0003 0039 ffffffff
 /dev/input/event0 0001 014a 00000000
 /dev/input/event0 0001 0145 00000000
 /dev/input/event0 0000 0000 00000000

So I copied the same events and made a batch file from that looks like following:

adb shell sendevent  /dev/input/event0 0003 0039 0000006c
adb shell sendevent /dev/input/event0 0001 014a 00000001
adb shell sendevent /dev/input/event0 0001 0145 00000001
adb shell sendevent /dev/input/event0 0003 0035 000003f8
adb shell sendevent /dev/input/event0 0003 0036 00000153
adb shell sendevent /dev/input/event0 0003 0030 00000001
adb shell sendevent /dev/input/event0 0003 0031 00000000
adb shell sendevent /dev/input/event0 0000 0000 00000000
adb shell sendevent /dev/input/event0 0003 0039 ffffffff
adb shell sendevent /dev/input/event0 0001 014a 00000000
adb shell sendevent /dev/input/event0 0001 0145 00000000
adb shell sendevent /dev/input/event0 0000 0000 00000000
adb shell sendevent /dev/input/event0 0003 0039 0000006d
adb shell sendevent /dev/input/event0 0001 014a 00000001
adb shell sendevent /dev/input/event0 0001 0145 00000001
adb shell sendevent /dev/input/event0 0003 0035 00000278
adb shell sendevent /dev/input/event0 0003 0036 0000022c
adb shell sendevent /dev/input/event0 0003 0030 00000004
adb shell sendevent /dev/input/event0 0003 0031 00000004
adb shell sendevent /dev/input/event0 0000 0000 00000000
adb shell sendevent /dev/input/event0 0003 0039 ffffffff
adb shell sendevent /dev/input/event0 0001 014a 00000000
adb shell sendevent /dev/input/event0 0001 0145 00000000
adb shell sendevent /dev/input/event0 0000 0000 00000000

But when I run this batch file, events are not simulated. Is there anything that I am missing here?

Upvotes: 0

Views: 3759

Answers (1)

Giuseppe Salvatore
Giuseppe Salvatore

Reputation: 726

I would have never thought that was the case, thanks for the suggestion. It actually works now and since I was using the script before it was just a matter of printing the hex values in a string and python would do the conversion. Note that this system is much faster than the input tap version. I can send touch events back to back with an interleaving of around 0.3 secs (I still don't understand why it's not able to handle faster sequences)

That's how I did it in python on a Nexus 5 running Android 6.1:

import os

EV_ABS             = 0x0003
EV_SYN             = 0x0000
ABS_MT_POSITION_X  = 0x0035
ABS_MT_POSITION_Y  = 0x0036
ABS_MT_PRESSURE    = 0x003a
ABS_MT_TOUCH_MAJOR = 0x0030
SYN_REPORT         = 0x0000
ABS_MT_TRACKING_ID = 0x0039

touch_event_id = 1

def touch(x, y):

    global touch_event_id

    event_string =  "sendevent /dev/input/event1 %d %d %d\n" % (EV_ABS, ABS_MT_TRACKING_ID, touch_event_id)
    event_string += "sendevent /dev/input/event1 %d %d %d\n" % (EV_ABS, ABS_MT_POSITION_X,  x)
    event_string += "sendevent /dev/input/event1 %d %d %d\n" % (EV_ABS, ABS_MT_POSITION_Y,  y)
    event_string += "sendevent /dev/input/event1 %d %d %d\n" % (EV_ABS, ABS_MT_PRESSURE,    5)
    event_string += "sendevent /dev/input/event1 %d %d %d\n" % (EV_ABS, ABS_MT_TOUCH_MAJOR, 5)
    event_string += "sendevent /dev/input/event1 %d %d %d\n" % (EV_SYN, SYN_REPORT,         0)

    event_string += "sendevent /dev/input/event1 %d %d %d\n" % (EV_ABS, ABS_MT_TRACKING_ID, -1)
    event_string += "sendevent /dev/input/event1 %d %d %d\n" % (EV_SYN, SYN_REPORT,         0)

    touch_event_id+=1

    os.system('adb shell "%s" &' % event_string)

Upvotes: 3

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