[UWP]如何将耳机切换到扬声器？ [英] [UWP]How to switch the headset to the speaker?

问题描述

我想尝试编写单击按钮的uwp，它会播放你想要的输出设备中的音乐

我找到了要使用的AudioGraph API。

我的应用程序可以找到两个输出设备，耳机和扬声器，使用此功能。

 Windows.Devices.Enumeration.DeviceInformation.FindAllAsync 

但无论我选择什么，我的winphone总是播放来自耳机的音乐。

如何切换它？ 哪个部分我做错了？

或者还有其他api可以做到吗？

thx。

（我已经测试了其他应用程序工作正常。我的意思是说话者没有坏掉。）

（实际上，我想写一个拨号器，但是动作拨盘仍在测试。所以我想先试试扬声器。）

 public AudioGraph audioflow; 
 public AudioDeviceOutputNode deviceOuput; 
 public AudioFileInputNode fileInput; 
 Public AudioGraphSettings设置; 
 
 private async void PlayButton_Click（object sender，RoutedEventArgs e）
 {
 
 
 Windows.Devices.Enumeration.DeviceInformationCollection devices = 
 await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync（Windows.Media.Devices.MediaDevice.GetAudioRenderSelector（））; 
 
 //显示UI以允许用户选择设备
 Windows.Devices.Enumeration.DeviceInformation selectedDevice = ShowMyDeviceSelectionUI1（devices）; 
 
 
 var song = String.Format（" /Assets/Mozart1.mp3"）; 
 var soundFile = await StorageFile.GetFileFromApplicationUriAsync（new Uri（BaseUri，song））; 
 
 
 settings = new AudioGraphSettings（AudioRenderCategory.Communications）; 
 settings.QuantumSizeSelectionMode = QuantumSizeSelectionMode.LowestLatency; 
 
 settings.PrimaryRenderDevice = selectedDevice; 
 CreateAudioGraphResult resultg = await AudioGraph.CreateAsync（settings）; 
 
 
 if（resultg.Status == AudioGraphCreationStatus.Success）
 {
 audioflow = resultg.Graph; 
 
 CreateAudioDeviceOutputNodeResult deviceOutputNodeResult = await audioflow.CreateDeviceOutputNodeAsync（）; 
 
 //确保音频输出准备好并且可用
 if（deviceOutputNodeResult.Status == AudioDeviceNodeCreationStatus.Success）
 {
 deviceOuput = deviceOutputNodeResult.DeviceOutputNode; 
 
 
 
 CreateAudioFileInputNodeResult fileInputResult = await audioflow.CreateFileInputNodeAsync（soundFile）; 
 fileInput = fileInputResult.FileInputNode; 
 fileInput.AddOutgoingConnection（deviceOuput）; 
 
 
 
 audioflow.Start（）; 
 SpeakerButton.IsEnabled = true; 
 
 
 
} 
 
} 
 
} 
 
 private DeviceInformation ShowMyDeviceSelectionUI1（DeviceInformationCollection devices） 
 {
 foreach（设备中的var a）
 ContactNameText.Text + = a.Name.ToString（）+" \\\
" ;; 
返回设备[1]; // [0]是耳机[1]是扬声器
} 
 
 
 

解决方案

同样的问题：

http://stackoverflow.com/questions/34586852/how -to-开关最outputdevice耳机到所述扬声器

I wanna try to write the uwp that I click a button ,it will play music from the outputdevice that you want

I found AudioGraph API to use.

my app can find two outputdevice , headset and speaker, by using this.

Windows.Devices.Enumeration.DeviceInformation.FindAllAsync

but no matter what I chose , my winphone always plays music from the headset.

How can I switch it?  which part that I did wrong

or is there any other api can do that?

thx.

(I've tested other app working fine.  I mean the speaker isn't broken.)
(Actually, I wanna write a dialer ,but the action dial is still testing.So I wanna try the speaker first.)

public AudioGraph audioflow;
public AudioDeviceOutputNode deviceOuput;
public AudioFileInputNode fileInput;
Public AudioGraphSettings settings;
    
    private async void PlayButton_Click(object sender, RoutedEventArgs e)
        {
            

            Windows.Devices.Enumeration.DeviceInformationCollection devices =
            await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync(Windows.Media.Devices.MediaDevice.GetAudioRenderSelector());

            // Show UI to allow the user to select a device
            Windows.Devices.Enumeration.DeviceInformation selectedDevice = ShowMyDeviceSelectionUI1(devices);


            var song = String.Format("/Assets/Mozart1.mp3");
            var soundFile = await StorageFile.GetFileFromApplicationUriAsync(new Uri(BaseUri, song));


            settings = new AudioGraphSettings(AudioRenderCategory.Communications);
            settings.QuantumSizeSelectionMode = QuantumSizeSelectionMode.LowestLatency;

            settings.PrimaryRenderDevice = selectedDevice;
            CreateAudioGraphResult resultg = await AudioGraph.CreateAsync(settings);
            

            if (resultg.Status == AudioGraphCreationStatus.Success)
            {
                audioflow = resultg.Graph;

                CreateAudioDeviceOutputNodeResult deviceOutputNodeResult = await audioflow.CreateDeviceOutputNodeAsync();

                // Ensure there's audio output ready and available
                if (deviceOutputNodeResult.Status == AudioDeviceNodeCreationStatus.Success)
                {
                    deviceOuput = deviceOutputNodeResult.DeviceOutputNode;
                   

                   
                        CreateAudioFileInputNodeResult fileInputResult = await audioflow.CreateFileInputNodeAsync(soundFile);
                        fileInput = fileInputResult.FileInputNode;
                        fileInput.AddOutgoingConnection(deviceOuput);
                    
                 
                   
                    audioflow.Start();
                    SpeakerButton.IsEnabled = true;



                }

            }

        }

 private DeviceInformation ShowMyDeviceSelectionUI1(DeviceInformationCollection devices)
        {
            foreach (var a in devices)
                ContactNameText.Text += a.Name.ToString() + "\n";
            return devices[1];//[0]is headset [1]is speaker
        }

解决方案

Same question:
http://stackoverflow.com/questions/34586852/how-to-switch-the-outputdevice-headset-to-the-speaker

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