On 25 August 2010 08:22, Android Developer core.test.accou...@gmail.com wrote:
I have a pre-installed application on device, when user upgrades
application on pre-installed application, i want to show alert
something similar change log when user opens the application. In pre-
installed application, it's not storing any version specific
information.Is there any way to recognize user is upgraded from the
pre-installed application?
Why do you even need to bother what version user upgraded from? The
simpliest approach could
be i.e. to store in app preferences app versionCode. On launch, check
if that prefs value exists.
if it does, check if value is lower than your versionCode, if it is,
user upgraded = show changelog.
If there's no prefs entry = show changelog as it is definitely old
code which did not store
such entry. Afterall store current versionCode so on next launch you
won't show changelog
as versionCodes would be equal.
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