The goal of this assignment is to review using Retrofit and Gson...
- Make a class representing an object from the server Example from week 5
- Create an interface representing all methods on the server Example from week 4
- Building an instance of Retrofit with a custom Gson Example from week 5
- Adding a custom json deserializer for a specific class. Example from week 5
For this assignment you will finishing an app that searches using the iTunes Search Api. You can see an example of the api results below. You will use a custom deserializer to map this response type to the ItunesSearchResults object. You will also create an ItunesSongItem. You do not need to add every field returned by the api, just the ones in the SongItem interface.
https://itunes.apple.com/search?media=music&limit=25&term=Taylor
Note: Anything a url after the ? is considered a query param. In this case the url has 3 query params: media, limit, and term. If you want to add a dynamic query param in a Retrofit interface you can use the @Query("...") annotation String param passed to the method and it will be added to the url.
{
"resultCount": 1,
"results": [
{
"wrapperType": "track",
"kind": "song",
"artistId": 159260351,
"collectionId": 295757174,
"trackId": 295757188,
"artistName": "Taylor Swift",
"collectionName": "Fearless",
"trackName": "Love Story",
"collectionCensoredName": "Fearless",
"trackCensoredName": "Love Story",
"artistViewUrl": "https://itunes.apple.com/us/artist/taylor-swift/159260351?uo=4",
"collectionViewUrl": "https://itunes.apple.com/us/album/love-story/295757174?i=295757188&uo=4",
"trackViewUrl": "https://itunes.apple.com/us/album/love-story/295757174?i=295757188&uo=4",
"previewUrl": "https://audio-ssl.itunes.apple.com/apple-assets-us-std-000001/Music/8d/7f/d5/mzm.yppdvtoz.aac.p.m4a",
"artworkUrl30": "https://is4-ssl.mzstatic.com/image/thumb/Music/v4/ae/35/ac/ae35ac3b-5c14-818e-a54c-a1f73ef13c54/source/30x30bb.jpg",
"artworkUrl60": "https://is4-ssl.mzstatic.com/image/thumb/Music/v4/ae/35/ac/ae35ac3b-5c14-818e-a54c-a1f73ef13c54/source/60x60bb.jpg",
"artworkUrl100": "https://is4-ssl.mzstatic.com/image/thumb/Music/v4/ae/35/ac/ae35ac3b-5c14-818e-a54c-a1f73ef13c54/source/100x100bb.jpg",
"collectionPrice": 7.99,
"trackPrice": 1.29,
"releaseDate": "2008-09-12T07:00:00Z",
"collectionExplicitness": "notExplicit",
"trackExplicitness": "notExplicit",
"discCount": 1,
"discNumber": 1,
"trackCount": 13,
"trackNumber": 3,
"trackTimeMillis": 235267,
"country": "USA",
"currency": "USD",
"primaryGenreName": "Country",
"isStreamable": true
}
]
}
- Complete the ItunesSongItem class
- Add a method to ItunesApi in the DataSources class that takes in a search query and returns a Call
- Create an instance of Gson with a custom type adapter for the ItunesSearchResults class
- Create an instance of the ItunesApi using Retrofit
- Finish implementing the DataSources.search() method
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