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从这里使用Xamarin.Forms相机示例 - https://github.com/XForms/Xamarin-Forms-Labs-Samples/tree/master/XF.Labs.CameraSample我可以选择或拍摄照片。那么我就需要这个图像转换成二进制Xamarin.Forms获取图像路径
所以这里是选择图像的代码：
private async Task SelectPicture()
{
mediaPicker = DependencyService.Get<IMediaPicker>();
imageSource = null;
var mediaFile = await mediaPicker.SelectPhotoAsync(new CameraMediaStorageOptions
{
DefaultCamera = CameraDevice.Front,
MaxPixelDimension = 400
});
imageSource = ImageSource.FromStream(() => mediaFile.Source);
img.Source = imageSource;
}
和接收图片的代码非常相似
private async Task TakePicture()
{
mediaPicker = DependencyService.Get<IMediaPicker>();
imageSource = null;
var mediaFile = await mediaPicker.TakePhotoAsync(new CameraMediaStorageOptions
{
DefaultCamera = CameraDevice.Front,
MaxPixelDimension = 400
});
imageSource = ImageSource.FromStream(() => mediaFile.Source);
img.Source = imageSource;
}
我该怎么办从上面获取实际的字符串imagePath，以便我可以调用下面的DependencyService？
public byte[] ImageToBinary(string imagePath)
{
FileStream fileStream = new FileStream(imagePath, FileMode.Open, FileAccess.Read);
byte[] buffer = new byte[fileStream.Length];
fileStream.Read(buffer, 0, (int)fileStream.Length);
fileStream.Close();
return buffer;
}