Android Question Sending files

heldenssjoerd said:

In our app we're using a variant of the tracker from here: https://www.b4x.com/android/forum/threads/background-location-tracking.99873/#content

When the location changes there is a generated an file and send to the server. (A)
However there is also a process that sends all present files (not only tracker-info). (B)

These two a sometimes sending the files twice. For example when process A is sending but not yet has deleted the file. Then process B is started in the background and is sending the same file again.

Do you have any thoughts on how to prevent this?

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teddybear said:

I have a question. why does process B send that file? According to your logic, process A will delete the file after sending it.
If it is considered that process A may fail to send the file, you can specify a special filename when sending.

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Alex_197 said:

Option 1 - use a database in your app and save each sent file name. Check this database before send each file.
Option 1 - on your server check every incoming file

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heldenssjoerd said:

Correct. But the file hasn't been deleted when process B is started (from a timer). So process A is sending (and waiting for completion) when process B is started and finds the same file.

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