在网络或互联网上使用媒体文件将增加应用程序的延迟。在手机加载文件之前,您无法开始播放媒体。使用MediaElement.MediaOpened来确定媒体何时准备就绪,然后调用.Play();
当然,您需要让用户知道媒体正在下载。我的例子使用SystemTray ProgressIndicator向用户显示一条消息。
XAML
<Grid x:Name="ContentPanel"
Grid.Row="1"
Margin="12,0,12,0">
<StackPanel>
<Button x:Name='PlayButton'
Click='PlayButton_Click'
Content='Play Media' />
<MediaElement x:Name='media1'
MediaOpened='Media1_MediaOpened'
AutoPlay='False' />
</StackPanel>
</Grid>
CODE
private void Media1_MediaOpened(object sender, RoutedEventArgs e) {
// MediaOpened event occurs when the media stream has been
// validated and opened, and the file headers have been read.
ShowProgressIndicator(false);
media1.Play();
}
private void PlayButton_Click(object sender, RoutedEventArgs e) {
// the SystemTray has a ProgressIndicator
// that you can use to display progress during async operations.
SystemTray.ProgressIndicator = new ProgressIndicator();
SystemTray.ProgressIndicator.Text = "Acquiring media - OverTheTop.mp3 ";
ShowProgressIndicator(true);
// Get the media
media1.Source =
new Uri(@"http://freesologuitar.com/mps/DonAlder_OverTheTop.mp3",
UriKind.Absolute);
}
private static void ShowProgressIndicator(bool isVisible) {
SystemTray.ProgressIndicator.IsIndeterminate = isVisible;
SystemTray.ProgressIndicator.IsVisible = isVisible;
}
感谢。虽然这不能解决无响应的用户界面(在下载示例时用户界面仍处于锁定状态),但它确实提供了更好的用户体验 – LDJ