changeCamera method

Implementation

void changeCamera() {
  setState(() {
    if (_cameraIndex < (widget.cameras.length - 1)) {
      _cameraIndex++;
    } else {
      _cameraIndex = 0;
    }
    _currentCamera = widget.cameras[_cameraIndex];
    _controller = CameraController(
      _currentCamera,
      widget.resolutionPreset,
    );
    _initializeControllerFuture = _controller.initialize();
  });
}