UWP--Naïve Media Player, Part 2
第一， 在线播放
第二， 将文件缓存到本地音乐文件夹中
功能一：在线播放，
这个没有什么复杂的，就是将对应的Uri传给mediaplayer.sourse就行了，方法如下：
我的代码：
private void playOnline_Click(object sender,RoutedEventArgs e)
{
var mediaPlayer = new MediaPlayer();
mediaPlayer.Source =MediaSource.CreateFromUri(new Uri("http://www.neu.edu.cn/indexsource/neusong.mp3"));
mediaPlayer.Play();
}
官方文档代码：
private void LoadMediaFromString(string path)
{
try
{
Uri pathUri = new Uri(path);
mediaPlayer.Source =MediaSource.CreateFromUri(pathUri);
}
catch (Exception ex)
{
if (ex is FormatException)
{
// handleexception.
// For example:Log error or notify user problem with file
}
}
在这里我直接将Uri设置成http://www.neu.edu.cn/indexsource/neusong.mp3是为了方便演示，
其实可以在界面上直接输入Uri来设置，进行在线播放。
功能二：将文件缓存到本地音乐文件内
官方代码：
private async void StartDownload_Click(object sender, RoutedEventArgse)
{
try
{
Uri source = new Uri(serverAddressField.Text.Trim());
string destination = fileNameField.Text.Trim();
StorageFile destinationFile = await KnownFolders.PicturesLibrary.CreateFileAsync(
destination,CreationCollisionOption.GenerateUniqueName)
BackgroundDownloader downloader= new BackgroundDownloader();
DownloadOperation download =downloader.CreateDownload(source, destinationFile);
// Attach progressand completion handlers.
HandleDownloadAsync(download, true);
}
catch (Exception ex)
{
LogException("Download Error", ex);
}
}
我的代码：
private async void download_Click(object sender,RoutedEventArgs e)
{
Uri source = newUri(serverAddressField.Text.Trim());
string destination = fileNameField.Text.Trim();
StorageFile destinationFile = awaitKnownFolders.MusicLibrary.CreateFileAsync(
destination,CreationCollisionOption.GenerateUniqueName);
BackgroundDownloader downloader = newBackgroundDownloader();
DownloadOperation download =downloader.CreateDownload(source, destinationFile);
await download.StartAsync();
}
在这里一个问题是要获得相应的权限：如图
在Package.appmainifest中，选择功能
选中音乐库