i found a correct solution :)
the first time he go to listview, he haven't the pics.. ok so pics have
a SetImageResource, and separate thread download the pics, and replace
the pics.
At this time, there is a minimum of 100 ms to download.. to cache the
pic.. and change the pic.
The second time he return to the listview, pic is in cache, so i do a
SetImageDrawable.
I understand android (in 2.1 i don't know later versions), hate have
changed lot of things at the same time, whether with the object image
directly, or with a FindViewById...
Le 27/03/2012 20:00, Miha Markic a écrit :
It is not clear from your description but here is my guess:
You know that you can touch UI elements only from within UI thread?
Try with RunOnUiThread method.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of michelw
Sent: Tuesday, March 27, 2012 2:30 PM
To: Discussions related to Mono for Android
Subject: [mono-android] multithread on a listview
Hello.
I've a listview with pics, and unique id for each pic.
I've a separate thread who change the pics.
If this thread change one pic per pic, no problem.
If this thread launch a separate thread to change the pic, and if i do a
thread.sleep(100) before launch each separate thread, no problem...
If i remove my sleep, or if i put a sleep< 100 ms, problems, he write to the
UI some pics at bad place (some pics, not all pics)
I try doing a lock on the setbackgroundimage with a global Object lock for see
but i've the same problem, i must do a sleep before each thread!
So my question, it's is possible, to change more than one pic at the same time
(or in a very very short time), on android...
or.. if it's not possible... is there a method to know where android have
finish to set the pic to an item ImageView
Android 2.1, on avd
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