Searches photos and images from Flickr. App lets you save original high quality images and lets you save images as wallpaper. App lets you zoom and move around pictures.
You have to have an account or need to register on Flickr and get API key to use. Replace your API key with API_KEY string.
After that you can build your apk using gradle assembleDebug and adb install app/build/outputs/apk/app-debug.apk