In the preceding sections we developed an
AsyncTaskLoader that can load a single image thumbnail as a
Bitmap, and a
CursorLoader that loads a list of all available images on the device. Let's bring them together to create an app that tiles thumbnails of all the images on the device in a scrollable grid, performing all loading in the background.
Thanks to our
CursorLoader, we already have access to the IDs of the images we need to load—we're displaying them as text—so we just need to pass those IDs to our
ThumbnailLoader for it to asynchronously load the image for us.
ThumbnailLoader was set up to load one
Bitmap and cache it forever (that is, until explicitly removed from
LoaderManager). We want to change that so that ...