Questions: compatibility and memory usage

[AndroidDeveloperLB]

How well does this library work on old/"weak" devices? Also, how efficient is the memory usage? Does it use the heap memory for the loaded gif, or the real device's memory?

I've tried running it on Xperia J device, and it seems that on some gif animations it doesn't show anything, and for some it works fine. Is it because of memory issues? Is there a callback for when it failed, so that I could have a fallback for such cases?