[Android] Add sort by release year for tracks

[Geoffrey Métais]

vlc-android | branch: 3.2.x | Geoffrey Métais <geoffrey.metais at gmail.com> | Mon Sep 23 14:49:29 2019 +0200| [da54d1a42b0fe313c982ccabecc5e70e61ee4a27] | committer: Geoffrey Métais

Add sort by release year for tracks

(cherry picked from commit 256e9cde0aab7d8771f4dbccf111c28f8c7b3b52)

> https://code.videolan.org/videolan/vlc-android/commit/da54d1a42b0fe313c982ccabecc5e70e61ee4a27
---

 .../src/org/videolan/vlc/providers/medialibrary/TracksProvider.kt     | 1 +
 vlc-android/src/org/videolan/vlc/util/ModelsHelper.kt                 | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/vlc-android/src/org/videolan/vlc/providers/medialibrary/TracksProvider.kt b/vlc-android/src/org/videolan/vlc/providers/medialibrary/TracksProvider.kt
index 7479edbd5..8f4812d0a 100644
--- a/vlc-android/src/org/videolan/vlc/providers/medialibrary/TracksProvider.kt
+++ b/vlc-android/src/org/videolan/vlc/providers/medialibrary/TracksProvider.kt
@@ -36,6 +36,7 @@ class TracksProvider(val parent : MediaLibraryItem?, context: Context, scope: So
     override fun canSortByDuration() = true
     override fun canSortByAlbum() = parent !== null
     override fun canSortByLastModified() = true
+    override fun canSortByReleaseDate() = true
 
     init {
         sort = Settings.getInstance(context).getInt(sortKey, AbstractMedialibrary.SORT_DEFAULT)
diff --git a/vlc-android/src/org/videolan/vlc/util/ModelsHelper.kt b/vlc-android/src/org/videolan/vlc/util/ModelsHelper.kt
index 98239f470..f4bef2c49 100644
--- a/vlc-android/src/org/videolan/vlc/util/ModelsHelper.kt
+++ b/vlc-android/src/org/videolan/vlc/util/ModelsHelper.kt
@@ -212,8 +212,8 @@ object ModelsHelper {
     }
 
     private fun MediaLibraryItem.getYear() = when (itemType) {
-        MediaLibraryItem.TYPE_ALBUM -> if ((this as AbstractAlbum).releaseYear == 0) "-" else releaseYear.toString()
-        MediaLibraryItem.TYPE_MEDIA -> if ((this as AbstractMediaWrapper).date == null) "-" else date
+        MediaLibraryItem.TYPE_ALBUM -> if ((this as AbstractAlbum).releaseYear <= 0) "-" else releaseYear.toString()
+        MediaLibraryItem.TYPE_MEDIA -> if ((this as AbstractMediaWrapper).releaseYear <= 0) "-" else releaseYear.toString()
         else -> "-"
     }