Uno Platform camera preview control - uno-platform

Question

How can I add an camera preview in a uno XAML Page?
Could be like this example
https://learn.microsoft.com/en-us/windows/uwp/audio-video-camera/simple-camera-preview-access
But the CameraCapture.InitializeAsyn is not implemented on Uno.
When it runs the following exception is thrown:
System.NotImplementedException: The member IAsyncAction
MediaCapture.InitializeAsync() is not implemented in Uno.
If is possible to use native android code, this sample do what I need.
https://learn.microsoft.com/en-us/samples/xamarin/monodroid-samples/android50-camera2basic/
Thanks!

Answer 1

On Android, you have at least two ways for doing something similar:
You can use the following, with native android intents, that you'll need to make conditional with __ANDROID__:
public MainPage()
{
...
BaseActivity.Current.ActivityResult += Current_ActivityResult;
}
private void Current_ActivityResult(object sender, BaseActivity.ActivityResultEventArgs e)
{
if (e.Data != null)
{
var bitmap = (Bitmap)e.Data.Extras.Get("data");
image.Source = bitmap;
}
else
{
image.Source = null;
}
}
public void button_Click(object sender, RoutedEventArgs e)
{
var intent = new Intent(MediaStore.ActionImageCapture);
BaseActivity.Current.StartActivityForResult(intent, 0);
}
or using the CameraCaptureUI class:
{
try
{
var captureUI = new CameraCaptureUI();
captureUI.PhotoSettings.Format = CameraCaptureUIPhotoFormat.Jpeg;
captureUI.PhotoSettings.CroppedSizeInPixels = new Size(200, 200);
var photo = await captureUI.CaptureFileAsync(CameraCaptureUIMode.Photo);
if (photo == null)
{
return;
}
else
{
var source = new BitmapImage(new Uri(photo.Path));
image.Source = source;
}
}
catch(Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
}
}
You can find the full examples for CameraCaptureUI, and native android.
Other types of camera capture are currently not implemented (as of Uno 3.0), and you'll need to go through native APIs to use them.