For the More Curious: Solving the Image Downloading Problem
This book is here to teach you mostly about the tools in the standard Android library. If you are open to using more third-party libraries (in addition to Retrofit and the others we have introduced), there are a few libraries that can save you a whole lot of time in various scenarios, including the image downloading work you implemented in PhotoGallery.
Admittedly, the solution you implemented in this chapter is far from perfect. And when you start to need caching, transformations, and better performance, it is natural to ask whether someone else has solved this problem before you. The answer is yes: Someone has. There are several libraries available that solve the image-loading ...
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