Android Programming: The Big Nerd Ranch Guide, 4th Edition

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, you are going to update PhotoHolder to provide ImageViews instead. Eventually, each ImageView will display a photo downloaded from the url of a GalleryItem.

Start by creating a new layout file for your gallery items called list_item_gallery.xml. This layout will consist of a single ImageView (Listing 25.1).

Listing 25.1  Gallery item layout (res/layout/list_item_gallery.xml)

<?xml version="1.0" encoding="utf-8"?>
<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
           android:layout_width="match_parent" ...