Viewing black icons in gallery

[Mass1veDynam1c]

I ripped some black icons but the preview in gallery is just solid black. I downloaded another gallery app but same thing. The icon files are fine. Any way for me to see them in gallery? TIA

 

[B. Diddy]

Welcome to Android Central! Are the files saved on internal storage or a microSD card?

How did you create the images? Are they downloaded from the web, or generated by an app?