Even though you have glide, images aren't getting preloaded before I see them

[EmmanuelMess]

Even though you have glide, images aren't getting preloaded before I see them. In my Motorola Moto E Gen 2 I'm seeing white squeares of not preloaded images. I don't think that my phone is slow, because I managed to make AmazeFileManger's file adapter preload quite nicely.