原始问题(对于Windows Phone 7)：我正在使用Windows Phone 7,并希望将下载的播客添加到播放列表中,以便我可以一次性收听它们.不幸的是,UI不允许这样做.我想知道是否有任何API可以做到这一点.
修改后的问题(对于Windows Phone 8)：我需要为Windows Phone 8添加“播放列表”api
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在我
mentioned on twitter中,在Windows Phone 8中,您可以使用MediaLibraryExtensions在设备的音乐库中添加或删除歌曲. MSDN
here上提到了新功能.但是,我找不到API的任何文档,因此这里是新的Microsoft.Xna.Framework.MediaLibraryExtensions.dll的API打印输出：
//Microsoft.Xna.Framework.MediaLibraryExtensions,Version=4.0.0.0,Culture=neutral,PublicKeyToken=842cf8be1de50553
namespace Microsoft.Xna.Framework.Media.PhoneExtensions {
public static class MediaLibraryExtensions {
public static void Delete(MediaLibrary library,Song song);
public static String GetPath(Picture picture);
public static String GetPathFromToken(MediaLibrary library,String token);
public static Stream GetPreviewImage(Picture picture);
public static Song SaveSong(MediaLibrary library,Uri filename,SongMetadata songMetadata,SaveSongOperation operation);
}
public enum SaveSongOperation {
CopyToLibrary,MoveToLibrary
}
public sealed class SongMetadata {
public SongMetadata();
public Uri AlbumArtistBackgroundUri { get; set; }
public String AlbumArtistName { get; set; }
public Uri AlbumArtUri { get; set; }
public String AlbumName { get; set; }
public DateTime AlbumReleaseDate { get; set; }
public Uri ArtistBackgroundUri { get; set; }
public String ArtistName { get; set; }
public TimeSpan Duration { get; set; }
public String GenreName { get; set; }
public String Name { get; set; }
public Int32 TrackNumber { get; set; }
}
}
您可以通过使用本地URI调用SaveSong并通过包含自定义SongMetadata来覆盖ID3元数据来使用此新API.此API仅允许您存储新歌曲,但我想您可以将您的播客分组为一位狡猾的艺术家.有关此API的快速说明是确保添加新的DLL引用MediaLibraryExtensions DLL.您还可以将SongMetadata保持为null并让WP8 OS推断出ID3元数据.
这是一个简单的代码片段：
private async void MainPage_Loaded(object sender,RoutedEventArgs e)
{
var sourceFile = await Package.Current.InstalledLocation.GetFileAsync("ChargeOfTheLightBridge.mp3");
CopyFileIntoIsoStore(sourceFile);
var library = new MediaLibrary();
library.SaveSong(new Uri(sourceFile.Name,UriKind.RelativeOrAbsolute),new SongMetadata()
{
ArtistName = "My Custom Artist",AlbumArtistName = "My Custom Artist",Name = "My Custom Track Name",AlbumName = "clubbing baby seals in the face",Duration = TimeSpan.FromSeconds(29),TrackNumber = 1,AlbumReleaseDate = DateTime.Now,GenreName = "Podcasts"
},SaveSongOperation.CopyToLibrary);
}
private async void CopyFileIntoIsoStore(StorageFile sourceFile)
{
using (var s = await sourceFile.OpenReadAsync())
using (var dr = new DataReader(s))
using (var isoStore = IsolatedStorageFile.GetUserStoreForApplication())
using (var targetFile = isoStore.CreateFile(sourceFile.Name))
{
var data = new byte[s.Size];
await dr.LoadAsync((uint) s.Size);
dr.ReadBytes(data);
targetFile.Write(data,data.Length);
}
}
请注意,我们必须在IsoStore中保存文件才能使用此API.另请注意,Uri格式不正确或在标准的IsoStore Uri中.这只是文件名.
