[Android] ViewModels for AlbumSongs and Playlist views

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Tue Mar  6 17:16:38 2018 +0100| [486f8f2670f31191177890d1bf5c5a450742872f] | committer: Geoffrey Métais

ViewModels for AlbumSongs and Playlist views

> https://code.videolan.org/videolan/vlc-android/commit/486f8f2670f31191177890d1bf5c5a450742872f
---

 .../src/org/videolan/vlc/gui/PlaylistActivity.java |  25 ++---
 .../vlc/gui/audio/AudioAlbumsSongsFragment.java    | 102 +++++++++------------
 .../videolan/vlc/viewmodels/audio/AlbumProvider.kt |  23 ++++-
 .../vlc/viewmodels/audio/TracksProvider.kt         |  17 +++-
 4 files changed, 93 insertions(+), 74 deletions(-)

Diff:   https://code.videolan.org/videolan/vlc-android/commit/486f8f2670f31191177890d1bf5c5a450742872f