How to fetch tracks from getMyPlaylists?

[priyanallan]

Hi,

I need to fetch playlists and corresponding tracks of a user. I use getMyPlaylists and it returns PlaylistSimple which has tracks of type 'PlaylistTracksInformation' but there is no information of Track (album, artist etc.) like in 'TrackSimple'. How do I fetch tracks of user playlists using 'PlaylistTracksInformation' ?

Thanks in advance.

[willccoates]

Since you are trying to obtain the playlists and the playlists tracks, you would first want to use getMyPlaylists to obtain a list of your playlists via PlaylistSimple, since PlaylistSimple gives you access to the playlists ID. I personally used the methods that included the callback in the parameters because when i tried using the methods that returned a specific type, it would give me permission errors but the callbacks allowed for a successful access of whatever i was trying to access.

Next you need to call getPlaylistTracks (shown below in the screen capture) using the required information ( user ID, playlist ID, options, callback) to access the information about the playlist tracks.

One thing to note about getPlaylistTracks is that it can only retrieve 100 tracks at a time. check out this link for more information about the options parameter #105 (comment).

I hope this helps!

[priyanallan]

Thanks for the response. As per the docs the number of playlists returned for a user is 'Default:20; minimum: 1 and maximum: 1=50) what is the difference between default and maximum?

[willccoates]

Essentially, when calling getMyPlaylist() you have the options parameter, where it is a Map<String, object>. When you create this Map object you specify what the maximum amount of items you want to receive and if you do not specify, it will default to 20. So following the example by Kaaes at this link: #105 (comment) we can see you create the Map object and set the size, in the case for playlists 50 by doing

options.put(SpotifyService.LIMIT, 50);

Then, you tell Spotify where you want to begin in the list, in this case the beginning being 0

options.put(SpotifyService.OFFSET, 0);

If you have more than 50 playlists, you would need to adjust the OFFSET to the next set of 50 playlists by changing the 0 to 50,100,150, etc.

As you can see in the documentation, the query parameters are optional, so by just simply creating the options Map object and not putting anything inside, the Spotify API defaults to 20 playlists.

I hope this helps! :)