In the JavaScript SDK there's dz.player.preloadTrack which works great to smoothen track transitions. An analogous API does not appear to be available in the Deezer Android SDK — is this planned or is the app expected to create two Player instances where the next track is on "stand-by" in the other instance?
Indeed for now there is no preloading feature in the Android SDK, but we will look into this for a next version of the SDK. For now indeed you might want to create a second player to get a smooth transition between two tracks. Please note that you can have up to 5 Players simultaneously in Deezer's SDK.