14.02.2011 23:13, Kevin Duffey пишет:
Incidentally, I don't know if there are other reasons for restarting
activities on orientation changes, but I know one reason it's done is
to allow potential layout changes to occur. You can provide layouts
for both landscape and portrait. I don't know why some sort of event
handler couldn't be called without restarting the entire activity...
There is just such handler - onConfigurationChanged:
http://developer.android.com/reference/android/app/Activity.html#onConfigurationChanged(android.content.res.Configuration)
... but you have to tell Android that your code is able to handle it:
http://developer.android.com/guide/topics/manifest/activity-element.html#config
Note that there are more potential config change cases than just the
orientation change - in particular, the user may change the phone's
locale setting - other cases are listed on the page above.
The automatic destroy / recreate cycle is there as a catch-all, with the
onConfigurationChanged providing a possibility for an optimization.
--
Kostya Vasilyev -- http://kmansoft.wordpress.com
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