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Android Programming: The Big Nerd Ranch Guide, 2nd Edition
book

Android Programming: The Big Nerd Ranch Guide, 2nd Edition

by Bill Phillips, Chris Stewart, Brian Hardy, Kristin Marsicano
July 2015
Beginner to intermediate
600 pages
18h 59m
English
Big Nerd Ranch Guides
Content preview from Android Programming: The Big Nerd Ranch Guide, 2nd Edition

24 Loopers, Handlers, and HandlerThread

Now that you have downloaded and parsed JSON from Flickr, your next task is to download and display images. In this chapter, you will learn how to use Looper, Handler, and HandlerThread to dynamically download and display photos in PhotoGallery.

Preparing RecyclerView to Display Images

The current PhotoHolder in PhotoGalleryFragment simply provides TextViews for the RecyclerView’s GridLayoutManager to display. Each TextView displays the caption of a GalleryItem.

To display photos, update PhotoHolder to provide ImageViews instead. Eventually, each ImageView will display a photo downloaded from the mUrl of a GalleryItem.

Start by creating a new layout file for your gallery items called ...

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Publisher Resources

ISBN: 9780134171517Purchase book