<phone:PhoneApplicationPagex:Class="Demo.Media.MusicMediaLibrary"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"FontFamily="{StaticResource PhoneFontFamilyNormal}"FontSize="{StaticResource PhoneFontSizeNormal}"Foreground="{StaticResource PhoneForegroundBrush}"SupportedOrientations="Portrait" Orientation="Portrait"mc:Ignorable="d"shell:SystemTray.IsVisible="True"><Grid Background="Transparent"><StackPanel Orientation="Vertical"><Button x:Name="btnAdd" Content="添加音乐到音乐中心" Click="btnAdd_Click" /><Button x:Name="btnDelete" Content="从音乐中心删除音乐" Click="btnDelete_Click" /></StackPanel></Grid></phone:PhoneApplicationPage>

/** 演示如何添加音乐到音乐中心，以及如何从音乐中心删除音乐* * * 在 wp8 中新增了 Microsoft.Xna.Framework.Media.PhoneExtensions.MediaLibraryExtensions，其扩展了 MediaLibrary 类*     MediaLibrary.SaveSong(Uri filename, SongMetadata songMetadata, SaveSongOperation operation) - 保存音乐到音乐中心，返回 Song 对象*         Uri filename - 需要添加到音乐中心的音乐文件，必须在 IsolatedStorage 下*         SongMetadata songMetadata - 元数据*         SaveSongOperation operation - CopyToLibrary 拷贝音乐文件；MoveToLibrary 移动音乐文件*     MediaLibrary.Delete(Song song) - 根据 Song 对象从音乐中心删除数据* * * 注：* 1、需要在 manifest 中增加配置 <Capability Name="ID_CAP_MEDIALIB_AUDIO" />* 2、音乐文件只支持mp3和wma，且必须在 IsolatedStorage 下* 3、音乐的封面文件只支持jpg，且必须在 IsolatedStorage 下* * * 另：* 1、播放音乐或视频的话，需要在 manifest 中增加配置 <Capability Name="ID_CAP_MEDIALIB_PLAYBACK" />* 2、除了用 MediaElement 播放音乐外，还可以用 MediaPlayer（xna） 播放，参见：http://www.cnblogs.com/webabcd/archive/2011/07/11/2102713.html*/using System;
using System.Collections.Generic;
using System.Windows;
using Microsoft.Phone.Controls;
using Microsoft.Xna.Framework.Media;
using Microsoft.Xna.Framework.Media.PhoneExtensions;
using System.IO.IsolatedStorage;
using System.IO;
using Windows.Storage.Streams;
using Windows.Storage;
using System.Threading.Tasks;namespace Demo.Media
{public partial class MusicMediaLibrary : PhoneApplicationPage{private Random _random = new Random();public MusicMediaLibrary(){InitializeComponent();}private async void btnAdd_Click(object sender, RoutedEventArgs e){// 将相关文件复制到 ApplicationData 的 Local 目录下await CopyFileToApplicationData(new Uri("ms-appx:///Assets/Demo.mp3", UriKind.Absolute), "Demo.mp3");await CopyFileToApplicationData(new Uri("ms-appx:///Assets/Son.jpg", UriKind.Absolute), "Son.jpg");// 将相关文件复制到 IsolatedStorage 的根目录下// CopyFileToIsolatedStorage(new Uri("Assets/Demo.mp3", UriKind.Relative), "Demo.mp3");// CopyFileToIsolatedStorage(new Uri("Assets/Son.jpg", UriKind.Relative), "Son.jpg");// 需要添加到音乐中心的音乐文件仅支持mp3和wma，且必须在 ApplicationData 下，以下格式会先在 Local 目录下找，找不到再到 Local/IsolatedStorage 目录下找Uri musicUri = new Uri("Demo.mp3", UriKind.Relative);// 需要添加到音乐中心的音乐封面文件仅支持jpg，且必须在 ApplicationData 下，以下格式会先在 Local 目录下找，找不到再到 Local/IsolatedStorage 目录下找Uri picUri = new Uri("Son.jpg", UriKind.Relative);// 构造 SongMetadata 对象// 如果按以下内容设置 SongMetadata 对象，则音乐文件在音乐中心的保存路径为：webabcd/webabcd album/music xxxx.mp3SongMetadata sm = new SongMetadata();sm.AlbumName = "webabcd album";sm.ArtistName = "webabcd";sm.GenreName = "rock";sm.Name = "music " + _random.Next(1000, 10000).ToString();sm.ArtistBackgroundUri = picUri;sm.AlbumArtUri = picUri;sm.AlbumArtistBackgroundUri = picUri;MediaLibrary library = new MediaLibrary();try{// 添加音乐文件到音乐中心Song song = library.SaveSong(musicUri, sm, SaveSongOperation.CopyToLibrary);}catch (Exception ex){// 如果文件已存在，则会抛出 System.InvalidOperationException 异常
                MessageBox.Show(ex.Message);}}private void btnDelete_Click(object sender, RoutedEventArgs e){/** MediaLibrary - 媒体库*     Songs - 返回音乐中心的 SongCollection*     Albums - 返回音乐中心的 AlbumCollection*     Artists - 返回音乐中心的 ArtistCollection*     Genres - 返回音乐中心的 GenreCollection*     Playlists - 返回音乐中心的 Playlists*/MediaLibrary library = new MediaLibrary();// 通过 MediaLibrary 遍历音乐中心中的音乐文件foreach (Song song in library.Songs){// 从音乐中心删除音乐文件if (song.Artist.Name == "webabcd")library.Delete(song);}}// 将文件从 Package 复制到 IsolatedStorage 的根目录下private void CopyFileToIsolatedStorage(Uri sourceUri, string targetFileName){IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();using (Stream input = Application.GetResourceStream(sourceUri).Stream){using (IsolatedStorageFileStream output = isf.CreateFile(targetFileName)){byte[] readBuffer = new byte[4096];int bytesRead = -1;while ((bytesRead = input.Read(readBuffer, 0, readBuffer.Length)) > 0){output.Write(readBuffer, 0, bytesRead);}}}}// 将文件从 Package 复制到 ApplicationData 的 Local 目录下private async Task CopyFileToApplicationData(Uri sourceUri, string targetFileName){StorageFolder applicationFolder = ApplicationData.Current.LocalFolder;StorageFile sourceFile = await StorageFile.GetFileFromApplicationUriAsync(sourceUri);await sourceFile.CopyAsync(applicationFolder, targetFileName, NameCollisionOption.ReplaceExisting);}}
}

<phone:PhoneApplicationPagex:Class="Demo.Media.PictureMediaLibrary"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"FontFamily="{StaticResource PhoneFontFamilyNormal}"FontSize="{StaticResource PhoneFontSizeNormal}"Foreground="{StaticResource PhoneForegroundBrush}"SupportedOrientations="Portrait" Orientation="Portrait"mc:Ignorable="d"shell:SystemTray.IsVisible="True"><Grid Background="Transparent"><StackPanel Orientation="Vertical"><Image Name="img" Width="50" Height="50" /><Image Name="img2" Width="50" Height="50" Margin="0 10 0 0" /><Image Name="img3" Width="50" Height="50" Margin="0 10 0 0" /><Button x:Name="btnGet" Content="获取图片中心的图片的小缩略图和预览图" Click="btnGet_Click" /><Button x:Name="btnShare" Content="共享图片中心的指定的图片" Click="btnShare_Click"  /></StackPanel></Grid></phone:PhoneApplicationPage>

/** 演示与图片中心相关的新增功能* * * 在 wp8 中新增了 Microsoft.Xna.Framework.Media.PhoneExtensions.MediaLibraryExtensions，其扩展了 MediaLibrary 类和 Picture 类*     Picture.GetPreviewImage() - 获取预览图（介于缩略图与原图之间）*     Picture.GetPath() - 获取文件路径，可以用于“共享”之类的场景，本例会介绍*     MediaLibrary.GetPathFromToken(fileToken) - 根据 token 获取媒体库文件的路径* * * 注：* 1、需要在 manifest 中增加配置 <Capability Name="ID_CAP_MEDIALIB_PHOTO" />* 2、在 wp8 中，保存在手机上的每个图片，系统都将为其自动创建两种缩略图：小缩略图和预览图*/using System.Linq;
using System.Windows;
using Microsoft.Phone.Controls;
using Microsoft.Xna.Framework.Media;
using Microsoft.Xna.Framework.Media.PhoneExtensions;
using Microsoft.Phone;
using Microsoft.Phone.Tasks;namespace Demo.Media
{public partial class PictureMediaLibrary : PhoneApplicationPage{public PictureMediaLibrary(){InitializeComponent();}private void btnGet_Click(object sender, RoutedEventArgs e){/** MediaLibrary - 媒体库*     Pictures - 返回图片中心的全部图片*     SavedPictures - 返回图片中心的已保存图片*     RootPictureAlbum - 返回图片中心的所有根相册*/MediaLibrary library = new MediaLibrary();if (library.Pictures.Count > 0){// 获取图片中心的第一张图片Picture picture = library.Pictures.First();img.Source = PictureDecoder.DecodeJpeg(picture.GetImage()); // 获取原图img2.Source = PictureDecoder.DecodeJpeg(picture.GetThumbnail()); // 获取缩略图img3.Source = PictureDecoder.DecodeJpeg(picture.GetPreviewImage()); // 获取预览图
            }}private void btnShare_Click(object sender, RoutedEventArgs e){MediaLibrary library = new MediaLibrary();if (library.Pictures.Count > 0){Picture picture = library.Pictures.First();// 获取媒体文件路径string picturePath = picture.GetPath();// 由文件启动 app 时会传递过来文件的 token 值，用此方法可以根据 token 获取媒体库文件的路径// string picturePath = library.GetPathFromToken(fileToken);// 根据媒体文件路径共享之ShareMediaTask shareMediaTask = new ShareMediaTask();shareMediaTask.FilePath = picturePath;shareMediaTask.Show();}}}
}

<phone:PhoneApplicationPagex:Class="Demo.Media.BackgroundAudio"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"FontFamily="{StaticResource PhoneFontFamilyNormal}"FontSize="{StaticResource PhoneFontSizeNormal}"Foreground="{StaticResource PhoneForegroundBrush}"SupportedOrientations="Portrait" Orientation="Portrait"mc:Ignorable="d"shell:SystemTray.IsVisible="True"><Grid Background="Transparent"><StackPanel Orientation="Vertical"><TextBlock x:Name="lblMsg" TextWrapping="Wrap" Text="BackgroundAudioPlayer 的 PlayStateChanged 事件有了事件参数 PlayStateChangedEventArgs" /></StackPanel></Grid></phone:PhoneApplicationPage>

/** 演示后台音频播放的新增功能* * * 注：* 关于后台音频播放参见：http://www.cnblogs.com/webabcd/archive/2012/07/23/2604457.html*/using System;
using Microsoft.Phone.Controls;
using Microsoft.Phone.BackgroundAudio;namespace Demo.Media
{public partial class BackgroundAudio : PhoneApplicationPage{public BackgroundAudio(){InitializeComponent();// 播放状态发生改变时BackgroundAudioPlayer.Instance.PlayStateChanged += Instance_PlayStateChanged;}void Instance_PlayStateChanged(object sender, EventArgs e){/** 以下是新增功能*/// 将事件参数参数对象转换为 PlayStateChangedEventArgsPlayStateChangedEventArgs newEventArgs = (PlayStateChangedEventArgs)e;// BackgroundAudioPlayer 的当前的 PlayerStatePlayState currentPlayState = newEventArgs.CurrentPlayState;// BackgroundAudioPlayer 在进入当前 PlayerState 时的前一个 PlayerState（如果没有此中间状态则 IntermediatePlayState 等于 CurrentPlayState）PlayState intermediatePlayState = newEventArgs.IntermediatePlayState;  }}
}