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Ability to filter artists by genre

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This commit is contained in:
Adrian Ulrich 2015-11-07 11:21:13 +01:00
parent 37527e17cc
commit cb02b71bf4
2 changed files with 19 additions and 9 deletions
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2
src/ch/blinkenlights/android/vanilla/MediaAdapter.java
View File

@ -341,7 +341,7 @@ public class MediaAdapter
if (limiter != null && limiter.type == MediaUtils.TYPE_GENRE) {
// Genre is not standard metadata for MediaStore.Audio.Media.
// We have to query it through a separate provider. : /
return MediaUtils.buildGenreQuery((Long)limiter.data, projection, selection.toString(), selectionArgs, sort, mType == MediaUtils.TYPE_ALBUM);
return MediaUtils.buildGenreQuery((Long)limiter.data, projection, selection.toString(), selectionArgs, sort, mType);
} else {
if (limiter != null) {
if (selection.length() != 0)

26
src/ch/blinkenlights/android/vanilla/MediaUtils.java
View File

@ -191,8 +191,9 @@ public class MediaUtils {
* @param selection The selection to pass to the query, or null.
* @param selectionArgs The arguments to substitute into the selection.
* @param sort The sort order.
* @param type The media type to return
*/
public static QueryTask buildGenreQuery(long id, String[] projection, String selection, String[] selectionArgs, String sort, boolean returnAlbums)
public static QueryTask buildGenreQuery(long id, String[] projection, String selection, String[] selectionArgs, String sort, int type)
{
// Note: This function works on a raw sql query with way too much internal
// knowledge about the mediaProvider SQL table layout. Yes: it's ugly.
@ -202,7 +203,12 @@ public class MediaUtils {
Uri uri = MediaStore.Audio.Genres.Members.getContentUri("external", id);
String[] clonedProjection = projection.clone(); // we modify the projection, but this should not be visible to the caller
String sql = "";
String authority = (returnAlbums ? "album_info" : "audio");
String authority = "audio";
if (type == TYPE_ARTIST)
authority = "artist_info";
if (type == TYPE_ALBUM)
authority = "album_info";
// Our raw SQL query includes the album_info table (well: it's actually a view)
// which shares some columns with audio.
@ -212,18 +218,22 @@ public class MediaUtils {
// Prefix the SELECTed rows with the current table authority name
for (int i=0 ;i<clonedProjection.length; i++) {
clonedProjection[i] = authority+"."+clonedProjection[i];
if (clonedProjection[i].equals("0") == false) // do not prefix fake rows
clonedProjection[i] = authority+"."+clonedProjection[i];
}
sql += TextUtils.join(", ", clonedProjection);
sql += " FROM audio_genres_map_noid, audio, album_info";
sql += " WHERE(audio.album_id = album_info._id AND audio._id = audio_id AND genre_id=?)";
sql += " FROM audio_genres_map_noid, audio" + (authority.equals("audio") ? "" : ", "+authority);
sql += " WHERE(audio._id = audio_id AND genre_id=?)";
if (selection != null && selection.length() > 0)
sql += " AND("+selection.replaceAll(_FORCE_AUDIO_SRC, "$1audio.$2")+")";
if (returnAlbums)
sql += " GROUP BY album_info._id";
if (type == TYPE_ARTIST)
sql += " AND(artist_info._id = audio.artist_id) GROUP BY artist_info._id";
if (type == TYPE_ALBUM)
sql += " AND(album_info._id = audio.album_id) GROUP BY album_info._id";
if (sort != null && sort.length() > 0)
sql += " ORDER BY "+sort.replaceAll(_FORCE_AUDIO_SRC, "$1audio.$2");
@ -256,7 +266,7 @@ public class MediaUtils {
case TYPE_PLAYLIST:
return buildPlaylistQuery(id, projection, selection);
case TYPE_GENRE:
return buildGenreQuery(id, projection, selection, null, MediaStore.Audio.Genres.Members.TITLE_KEY, false);
return buildGenreQuery(id, projection, selection, null, MediaStore.Audio.Genres.Members.TITLE_KEY, TYPE_SONG);
default:
throw new IllegalArgumentException("Specified type not valid: " + type);
}