I've build an activity with a Listview like Youtube app's "my Videos".
All images are taken from disk or using a built-in video-thumbnail 
generator (if not exist a cached file).
I've noticed that this method that I use is really slow (I don't know how 
Youtube load this listview).
Besides, when I scroll the listview, appears often this message:

08-29 11:50:20.310: I/dalvikvm-heap(8635): Grow heap (frag case) to 
> 21.349MB for 4177936-byte allocation  

08-29 11:50:20.330: D/dalvikvm(8635): GC_CONCURRENT freed <1K, 35% free 
> 13459K/20615K, paused 1ms+3ms 

08-29 11:39:52.790: D/dalvikvm(8635): GC_FOR_ALLOC freed 6055K, 63% free 
> 6238K/16519K, paused 18ms


Is there a fast and good method to implement an infinite scrollable 
listview (considering that each item represents a video)?
I want to have the same performances of this activity (from Youtube App for 
ICS):

<https://lh3.googleusercontent.com/-oUl5H15fWkQ/UD3oY66i-iI/AAAAAAAACIc/BgJkgc56t78/s1600/youtube_infinitescroll.jpg.png>

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