Data/files erase on installation

I'd guess that it has something to do with the key signature you are using. By default Android should replace the app with the new one and retain data. If a different key is used, it will re-install and wipe data.

--- Jem

File.DirDefaultExternal should only be deleted when the user uninstalls your program. Unfortunately on some Android 2.2 devices this folder also gets deleted when doing a reinstall / update. This is a bug in one of the early versions of Android 2.2 (froyo).

The only workaround is to use a different folder.

Thank you, Erel, this was my guess, too.

I am now on an I9100G with And 2.3.6 and the reinstallationprocedure works fine.

Andy