小歐ou | 菜鳥自救會

 

前言

在 Windows Phone 如果想要控制閃光燈，該怎麼做？在 Windows Phone 8 提供類別與方法可直接控制閃光燈。

 

實作

AudioVideoCaptureDevice 類別用來擷取音樂和影片。

http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj207322%28v=vs.105%29.aspx

 

首先宣告一個 AudioVideoCaptureDevice 類別變數 Device。

protected AudioVideoCaptureDevice Device { get; set; }

 

開啟閃光燈

 

private async void ButtonTurnOnFlashLight_Click(object sender, RoutedEventArgs e)
{
    var sensorLocation = CameraSensorLocation.Back;

    try
    {
        if (this.Device == null)
        {
            //  取得 AudioViceoCaptureDevice
            this.Device = await AudioVideoCaptureDevice.OpenAsync(sensorLocation, AudioVideoCaptureDevice.GetAvailableCaptureResolutions(sensorLocation).First());
        }

        // Turn on FlashLight
        var supportedCameraModes = AudioVideoCaptureDevice.GetSupportedPropertyValues(sensorLocation, KnownCameraAudioVideoProperties.VideoTorchMode);
        if (supportedCameraModes.ToList().Contains((UInt32)VideoTorchMode.On))
        {
            this.Device.SetProperty(KnownCameraAudioVideoProperties.VideoTorchMode, VideoTorchMode.On);

            // 設定亮度為最大
            this.Device.SetProperty(KnownCameraAudioVideoProperties.VideoTorchPower, AudioVideoCaptureDevice.GetSupportedPropertyRange(sensorLocation, KnownCameraAudioVideoProperties.VideoTorchPower).Max);
        }
    }
    catch (Exception ex)
    {
        // 無法控制閃光燈
    }
}

 

關閉閃光燈

 

private void ButtonTurnOnFlashLight_Click(object sender, RoutedEventArgs e)
{
    var sensorLocation = CameraSensorLocation.Back;

    try
    {
        var supportedCameraModes = AudioVideoCaptureDevice
            .GetSupportedPropertyValues(sensorLocation, KnownCameraAudioVideoProperties.VideoTorchMode);
        // Turn off FlashLight
        if (this.Device != null && supportedCameraModes.ToList().Contains((UInt32)VideoTorchMode.Off))
        {            this.Device.SetProperty(KnownCameraAudioVideoProperties.VideoTorchMode, VideoTorchMode.Off);
        }
    }
    catch (Exception ex)
    {
        // 無法控制閃光燈
    }
}