Flickr is a wonderful image hosting and video hosting of Yahoo. With a free account, you can get a disk space up to 1 TB for uploading and sharing your photos as well as videos. In this post, I would like to make a small demo showing how we can consume the Flickr’s REST web service and display public images of an album on Android phone. The images could be shown either in thumbnail mode or medium mode. The example app is just a proof of concept, you have to improve it when you want to build a same one in practice because I just don’t care about optimizing resources (memory) in source code. You will also ‘learn’ how to implement a singleton pattern (in entire app) with roboguice. That means, small example, interesting use cases.