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On my windows laptop, I have a batch file which checks for a specific file and deletes it. My question is, is this possible on android, to make a file that runs at startup (without root), checks for the existence of a directory called "thumbnails" in /storage/sdcard0/DCIM", if exists, delete. Answers greatly appreciated

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Sure that is possible. Many apps (see our automation tag-wiki) offer that. I e.g. use (see: tasker tag-wiki) which offers to perform actions on device boot, and can execute shell commands. So a typical Tasker profile could be fired "on device boot" to "execute shell command" rm -rf /storage/sdcard0/DCIM/thumbnails. No check needed for the existence of that directory: If it existes, that command would remove it – and if it not exists, result is the same :)

While Tasker is not free (there's a 7 day trial, though) there are other free automation apps you could check with. I don't have a list of which ones provide on-boot command execution, so you had to look that up yourself.

In case your device is rooted, you'd have additional possibilities – e.g. utilizing init scripts. If your device doesn't support them as-shipped, there are some apps which could help adding that feature.


Disclosure: the linked app lists are my product, so those links go to my website.

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  • Thank you so much, but is there a way that I could do that without third party apps?
    – Jam coders
    Commented Nov 10, 2016 at 10:27
  • Please read the last paragraph again: If your device is rooted and supports init scripts, you can. Otherwise I'm not aware of any such possibility.
    – Izzy
    Commented Nov 10, 2016 at 10:29
  • Wow, I Just bought tasker, IT'S AMAZING!!! I would never have known there was such a thing! IT IS ALMIGHTY POWERFUL! thanks for recomending it.
    – Jam coders
    Commented Nov 14, 2016 at 10:24
  • It definitely is! I'm using it for years already. So if you're looking for ideas, see my Tasker resource collection :)
    – Izzy
    Commented Nov 14, 2016 at 12:24
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    Great page. Read through it in about half an hour! Was totally worth it!!
    – Jam coders
    Commented Nov 19, 2016 at 10:12

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