attachPreviewTexture method
Attach preview frames to a Flutter Texture.
Returns the id to passed a Texture.
If the Camera is already using a texture, the same id will be returned. call releasePreviewTexture to detach and release the current texture.
Throws a PlatformException if stopping preview fails; usually this would be because of a hardware or other low-level error, or because release has been called on this Camera instance.
Implementation
Future<int> attachPreviewTexture() async {
return _currentTexture ??=
await _channel.$attachPreviewTexture(this) as int;
}