Picasso keeps reloading images while scrolling upwards in listview, loads slowly

Question

I have been searching SO threads for answers but couldn\'t figure out my issue from previous discussion. I have a listview which loads about 50 images (it used to be about 100

Answer 1

I'd look at two things.

Number one is the sizes of the images being loaded. I don't know what the default maximum cache size is in Picasso, but it sounds like you may be exceeding it with just a few images, causing the others to be evicted from the cache.

Number two is probably not the core issue, but also contributes to performance. You are doing a lot findViewById() calls, which are fairly expensive. Look into the "ViewHolder" pattern for "caching" those lookups.

Edit - see Jake Wharton's answer to a similar question for more detail