private void NativeSurface_SurfaceTextureDestroyed(object sender,
TextureView.SurfaceTextureDestroyedEventArgs e)
{
_cameraAnalyzer.ShutdownCamera();
}
public void StopScanning()
{
CameraAnalyzer.ShutdownCamera();
//fix Android 7 bug: camera freezes because surfacedestroyed function isn't always called correct, the old surfaceview was still visible.
this.Visibility = ViewStates.Gone;
}