Android Tech Challenge: Catty

In this technical challenge, we implement an Android app for the TheCatAPI. We provide a skeleton, please use this for implementation. The result should be a production ready app for release. Please incorparate the following outlines:

• Language: Kotlin
• Minimum Version: Android 6 (API level 23)
• The app should follow Clean Architecture
• Please follow the skeleton project i.e. by putting all networking code in the networkingCore module
• Use MVVM for the view layer
• Use repository pattern for data layer
• Please use fragments for the screens
• Please develop the app in a modern way and use best practices
• Libraries can be used, but try to keep it at a minimum (OkHttp, Retrofit, .. should be used)
• Test the app: We expect Junit and Espresso tests
• For this app, the style of the components do not matter. Color, font and dimension can be choosen as seen fit, the screenshots are only for guidance.

Exercise 1

In this exercise, we prepare the app for usage with the TheCatAPI.

1. Get an API key from TheCatAPI.
2. In the login module, implement the screen shown at the end of this exercise.

• The Login button is only clickable if an API key is inserted
• When the Login button is clicked, the inserted API key is tested against TheCatAPI to check if the key is valid
• If this check fails, show an error dialog with a meaningful error
• If this check succeeds, move on to the next screen, which will be defined in Exercise 2
• If the checkbox Store this API key for future use is checked, store this API key securely in the app. Please be aware that this API key should be treated as highly sensitive information. On the next app start, the login screen is skipped and the stored API key is used.

3. The app should launch with the login screen as first screen (skipped when the checkbox was checked before)

Screen:

Exercise 2

In this exercise, we will talk with the API and create a view which shows a random cat.

1. Implement a BottomNavigationView like in the screenshot below
2. In the Random tab, a random cat is shown with some information about its breed.

• The screen is refreshable with a Pull to refresh action
• On refresh a new cat is shown with the corresponding description

Screen:

Exercise 3

In this exercise, we will create a list of random cats which is indefinitely scrollable.

1. Create a RecyclerView on the second tab

• The list consists of pictures of random cats
• It should be able, to indefinitely scroll the list and new images should be loaded dynamically

2. When a list item is clicked, the second screen is shown

• It contains the details of the shown cat of the first screen.
• A sharing screen is shown, when the image is long clicked to share the image.

Screens:

Exercise 4

The app should show a local notification on each day at 12 pm. The code for this is implemented in the notification module, but does not work correctly and seems faulty. Please fix this, so that it works as expected.

Bonus Exercise

At this point we have a working Catty app. Now the same is required for dogs. Fortunately, the same API exists as TheDogAPI. Create a second flavor of this app which shows dogs instead of cats.