March 2013
Beginner to intermediate
580 pages
16h 11m
English
Content preview from Android Programming: The Big Nerd Ranch GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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27Loopers, Handlers, and HandlerThread
Now that you have downloaded and parsed XML 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 GridView for Displaying Images
The current adapter in PhotoGalleryFragment simply provides TextViews for the GridView to display. Each TextView displays the caption of a GalleryItem.
To display photos, you need a custom adapter that provides 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 gallery_item.xml. This layout will consist ...
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