Shutterbug is an Android library that lets you fetch remote images and cache them. It is particularly suited for displaying remote images in lists, grids, and maps as it includes convenience subclasses of ImageView (FetchableImageView) and OverlayItem (FetchableOverlayItem) that make implementation a one-liner.

A dual memory and disk cache was implemented. It makes use of two backports of Android classes: LruCache for the memory part and DiskLruCache for the disk part. LruCache was introduced by API Level 12, but we provide it here as a standalone class so you can use the library under lower level APIs. Both LruCache and DiskLruCache are licensed under the Apache Software License, 2.0.

Shutterbug was inspired by SDWebImage which does the same thing on iOS. It uses the same structure and interface. People who are familiar with SDWebImage on iOS will feel at home with Shutterbug on Android.

First, ensure that the following permissions were added to your AndroidManifest.xml file:

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

1. Instantiate the subclass (either in your code or in an xml file, for example by replacing ImageView by com.applidium.shutterbug.FetchableImageView).
2. Fetch the image (setImage(String url) or setImage(String url, Drawable placeholderDrawable) if you need to add a placeholder while waiting for the image to be fetched)
3. That's it!

We also provide you with a listener interface (FetchableImageViewListener and FetchableOverlayItemListener) which will help you refresh your UI if need.

If you need to do more advanced coding, you can use ShutterbugManager. It is a singleton class whose instance is accessed by the static method ShutterbugManager.getSharedManager(context). Downloading and caching is done by calling download(String url, ShutterbugManagerListener listener) on this instance.