ADB shell commands on one line / bash script?

Question

For most ADB commands, I understand how to run them on a single line or even when placing them in a shell script, it can easily be done by implementing the secondary command after 'adb shell' but adding " ".

But for some reason nothing works on trying to run this command via a single line or even by putting it in a shell script:

adb shell 
task_id=$(dumpsys activity | grep -A2 "(dumpsys activity recents)"| grep '#'| cut -d ' ' -f 7| cut -c 2-); am task lock $task_id

Btw, this is to "screen pin" an application on Android devices.

does it give an error message, and what is the error message ? — 0.sh
– 0.sh, Commented Jun 26, 2017 at 21:57
In addition to any error messages, you should also mention whether you're running the adb command on Linux, Mac, or Windows. — Michael Burr
– Michael Burr, Commented Jun 26, 2017 at 22:18

Bertrand Martel · Accepted Answer · 2017-06-26 22:15:03Z

2

You need quotes around your commands :

adb shell '
task_id=$(dumpsys activity | grep -A2 "(dumpsys activity recents)"| grep "#"| cut -d " " -f 7| cut -c 2-)
echo "locking task $task_id"
am task lock $task_id
'

or on one line:

adb shell 'task_id=$(dumpsys activity | grep -A2 "(dumpsys activity recents)"| grep "#"| cut -d " " -f 7| cut -c 2-); am task lock $task_id'

answered Jun 26, 2017 at 22:15

Bertrand Martel

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2 Comments

wakawakalaka Over a year ago

omg... I thought I tried that. lol. I think I accidentally used double quotes instead. wow I'm dumb. lol. But thank you!

Dimitri Kopriwa Over a year ago

I just tried to activate skiagl with adb shell 'su;setprop debug.hwui.renderer skiagl;stop;start' , see doc here: developer.android.com/studio/run/… i never get the command line back

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