Delete file after sharing via intent

android file email android-activity delete-file
Matt picture Matt · Jan 5, 2011 · Viewed 7k times · Source

I'm trying to delete a temporary file after sharing it via android's Intent.ACTION_SEND feature. Right now I am starting the activity for a result and in OnActivityResult, I am deleting the file. Unfortunately this only works if I am debugging it with a breakpoint, but when I let it run freely and say, email the file, the email has no attachment.

I think what is happening is my activity is deleting the file before it had been emailed. What I don't get is why, shouldn't onActivityResult only be called AFTER the other activity is finished?

I have also tried deleting the file in onResume, but no luck.

Is there a better way to do this?

Answer

mmeyer picture mmeyer · Jan 5, 2011

I noticed the same behavior with a similar approach. While watching logcat for errors I saw gmail complaining that it couldnt find the attachment. So, yes, it seems the intent returns BEFORE gmail has actually read the file for attachment.

I havent gotten around to a solution yet but it's likely going to be something like:

  • move the file to some directory so I know it's one I've decided to send
  • send it as attachment via ACTION_SEND
  • at next onResume for my start screen activity, delete files in the "sent" directory that are older than some time frame that's reasonably long enough for the send to actually have happened

Choosing an appropriate time frame might be tricky since it's probably the case that gmail (or other ACTION_SEND providers) dont actually read the file until it has a network connection. I'm thinking 24 hours should be reasonable and in my case I'm dealing with diagnostic logs so there's no real harm in deleting one too soon if the user has been off network for a long period of time.

If the content of your file is text and it's not obscenely large a simpler approach may be to read the contents of the file and use Intent.putExtra(android.content.Intent.EXTRA_TEXT, yourText) to inline it into the body of the message.

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