[UWP]如何从MediaTransportControls类获取播放/暂停按钮单击事件 [英] [UWP]How to get Play/Pause button click event from MediaTransportControls class

问题描述

我正在使用MediaPlayerElement开发应用程序，并且我在应用程序中启用了MediaTransportControl。

播放/暂停时但是在播放媒体流时单击，它会根据其状态导致流播放或暂停。

但是，当流结束并单击播放/暂停按钮时，流重新开始播放。

我想捕获播放/暂停按钮单击事件，并在播放/暂停单击时重新启动流时在我的应用程序中执行某些操作。但是，  MediaTransportControls类似乎没有提供任何事件来获取播放/暂停
按钮的点击信息。在点击播放/暂停按钮时，能否向我提供有关如何捕获事件的详细信息？

提前致谢。

问候，

p>

Shikhar

解决方案

要处理SMTC的按钮点击事件，您可以处理  SystemMediaTransportControls .ButtonPressed事件。当在SMTC上按下按钮
时会发生这种情况。 

像这样：

 async void SystemControls_ButtonPressed （SystemMediaTransportControls sender，
 SystemMediaTransportControlsButtonPressedEventArgs args）
 {
 switch（args.Button）
 {
 case SystemMediaTransportControlsButton.Play：
 await Dispatcher.RunAsync（Windows .UI.Core.CoreDispatcherPriority.Normal，（）=> 
 {
 mediaElement.Play（）; 
}）; 
休息; 
 case SystemMediaTransportControlsButton.Pause：
等待Dispatcher.RunAsync（Windows.UI.Core.CoreDispatcherPriority.Normal，（）=> 
 {
 mediaElement.Pause（）; 
}）; 
休息; 
默认值：
 break; 
} 
} 

有关如何与系统媒体传输控件集成的详细信息，请参阅以下链接：处理
系统媒体传输控制按钮按。

祝你好运

Roy

Hi,

I am developing an application using MediaPlayerElement and I have MediaTransportControls enabled in the application.

When Play/Pause but is clicked while media stream is playing, it caused the stream to play or pause based on its state.

However, when the stream has ended and Play/Pause button is clicked, the stream restarts playing.

I want to capture the Play/Pause button click event and take some actions in my application when the stream restarts on Play/Pause click. But, MediaTransportControls class doesn't seem to provide any event to get the click information of Play/Pause button. Can you please provide me details on how to capture the event when Play/Pause button is clicked?

Thanks in advance.

Regards,

Shikhar

解决方案

Hi,

To handle the button click event of the SMTC, you could handle the SystemMediaTransportControls.ButtonPressed Event. It occurs when a button is pressed on the SMTC. 

Like this:

async void SystemControls_ButtonPressed(SystemMediaTransportControls sender,
    SystemMediaTransportControlsButtonPressedEventArgs args)
{
    switch (args.Button)
    {
        case SystemMediaTransportControlsButton.Play:
            await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
            {
                mediaElement.Play();
            });
            break;
        case SystemMediaTransportControlsButton.Pause:
            await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
            {
                mediaElement.Pause();
            });
            break;
        default:
            break;
    }
}

For more information about how to Integrate with the System Media Transport Controls, you could refer this link:Handle system media transport controls button presses.

Best regards

Roy

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