public async Task <IEnumerable <Genre> > GetGenresAsync(GenreSortOrder sortOrder = GenreSortOrder.Default)
{
return(await LoadGenresAsync(
selection : null,
selectionArgs : null,
sortOrder : sortOrder
));
}
public async Task <IEnumerable <Genre> > GetGenresAsync(GenreSortOrder sortOrder = GenreSortOrder.Default)
{
return(await Task.Run(() =>
{
var mediaQuery = PrepareMediaQuery();
return mediaQuery.ToGenres(sortOrder);
}));
}
internal static IEnumerable <Genre> ToGenres(this MPMediaQuery mediaQuery, GenreSortOrder sortOrder)
{
foreach (var mediaItem in mediaQuery.Items)
{
if (mediaItem != null)
{
yield return(mediaItem.ToGenre());
}
}
}
private async Task <IEnumerable <Genre> > LoadGenresAsync(string selection, string[] selectionArgs, GenreSortOrder sortOrder)
{
return(await Task.Run(() =>
{
using var cursor = Android.App.Application.Context.ContentResolver.Query(
uri: MediaStore.Audio.Genres.ExternalContentUri,
projection: _projections,
selection: selection,
selectionArgs: selectionArgs,
sortOrder: sortOrder.ToStringSortOrder()
);
return cursor.ToGenres();
}));
}
public async Task <IEnumerable <Genre> > SearchGenresAsync(string searchTerm, GenreSortOrder sortOrder = GenreSortOrder.Default)
{
if (string.IsNullOrWhiteSpace(searchTerm))
{
throw new ArgumentNullException(nameof(searchTerm));
}
return(await LoadGenresAsync(
selection : MediaStore.Audio.GenresColumns.Name + " like ?",
selectionArgs : new[] { searchTerm + "%" },
sortOrder : sortOrder
));
}
public async Task <IEnumerable <Genre> > SearchGenresAsync(string searchTerm, GenreSortOrder sortOrder = GenreSortOrder.Default)
{
if (string.IsNullOrWhiteSpace(searchTerm))
{
throw new ArgumentNullException(nameof(searchTerm));
}
return(await Task.Run(() =>
{
var mediaQuery = PrepareMediaQuery();
var value = NSObject.FromObject(searchTerm);
var searchTermPredicate = MPMediaPropertyPredicate.PredicateWithValue(value, MPMediaItem.TitleProperty, MPMediaPredicateComparison.Contains);
mediaQuery.AddFilterPredicate(searchTermPredicate);
return mediaQuery.ToGenres(sortOrder);
}));
}
