Simple gallery app powered by the Flickr API
In order to prevent my API key from being committed, I created a secret.properties file which contained it.
Your secret.properties file should look like:
API_KEY="..."
My task was to build a simple gallery application that would show off a series of images which would be fetched from Flickr's REST API.
To communicate with the Flickr REST API, I used Retrofit with Kotlin coroutines. I chose coroutines over RxJava because the API was simplistic enough to do API calls but if anything complex like map or filter was required, I could rely on the builtin functional operators in the Collections APIs provided by Kotlin, and any stream-related operations could be done using channels.
To load images, I used Glide as it was one of the most commonly used libraries in Android development for image loading. I chose it over Fresco because I would be able to manipulate the images as if it was an ImageView while configuring the images to how I need it to be.
For dependency injection, I used Dagger as it's commonly used in Android development for it and it was the one I'm most familiar with.
If I had more time, I would have:
- written some UI automation tests with Espresso
- added some prefetching optimizations related to Glide so the RecyclerView would scroll smoother
- tested and see if Kotlin Android Extensions works with ViewHolders now
- had 2 model classes for Image (one as a data transfer object, and one to use throughout the app)
- Since Moshi prefers classes that mirror the JSON, if there was any snake case variables to use, I would've preferred those be switched to camel case variables so I would've created a model class that had the camel case variables.