[Windows Phone] 在 Windows Phone 8 控制闪光灯

原文: [Windows Phone] 在 Windows Phone 8 控制闪光灯

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前言

在 Windows Phone 如果想要控制闪光灯，该怎麽做？在 Windows Phone 8 提供类别与方法可直接控制闪光灯。

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实作

AudioVideoCaptureDevice 类别用来撷取音乐和影片。

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

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首先宣告一个 AudioVideoCaptureDevice 类别变数 Device。

protected AudioVideoCaptureDevice Device { get; set; }

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开启闪光灯

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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);



            // 设定亮度为最大

            this.Device.SetProperty(KnownCameraAudioVideoProperties.VideoTorchPower, AudioVideoCaptureDevice.GetSupportedPropertyRange(sensorLocation, KnownCameraAudioVideoProperties.VideoTorchPower).Max);

        }

    }

    catch (Exception ex)

    {

        // 无法控制闪光灯

    }

}

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关闭闪光灯

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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)

    {

        // 无法控制闪光灯

    }

}

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posted on 2013/10/2 02:40 | 我要推荐 | 阅读数 : 1214 | 订阅