如何使用Getx Flutter显示使用相机后的图像？

dependencies:
  flutter:
    sdk: flutter
  get: ^4.1.4
  camera: ^0.10.0

import 'package:get/get.dart';
import 'package:camera/camera.dart';

class CameraController extends GetxController {
  CameraController();

  CameraController get to => Get.find();

  CameraController get cameraController => Get.find();

  CameraController get imageController => Get.find();

  final cameras = <CameraDescription>[];
  late CameraController camera;

  Future<void> initCamera() async {
    cameras.clear();
    cameras.addAll(await availableCameras());

    camera = CameraController(
      cameras[0],
      ResolutionPreset.medium,
    );

    await camera.initialize();
    await camera.lockCaptureOrientation(DeviceOrientation.portraitUp);
  }

  void disposeCamera() {
    camera.dispose();
  }

  Future<String> takePicture() async {
    final Directory extDir = await getApplicationDocumentsDirectory();
    final String dirPath = '${extDir.path}/Pictures';
    await Directory(dirPath).create(recursive: true);
    final String filePath = '$dirPath/${DateTime.now().millisecondsSinceEpoch}.jpg';

    if (camera.value.isTakingPicture) {
      return Future.error('Camera is busy');
    }

    try {
      await camera.takePicture(filePath);
    } on CameraException catch (e) {
      return Future.error(e.description);
    }
    
    return filePath;
  }
}

class CameraPage extends GetView<CameraController> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Camera Page')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            ElevatedButton(
              onPressed: () async {
                await controller.initCamera();
              },
              child: Text('Open Camera'),
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: () async {
                final imagePath = await controller.takePicture();
                Get.snackbar(
                  'Image Saved',
                  'Image saved to $imagePath',
                  backgroundColor: Colors.green,
                  colorText: Colors.white,
                );
              },
              child: Text('Take Picture'),
            ),
            SizedBox(height: 20),
            Obx(
              () => controller.camera.value.isInitialized
                  ? AspectRatio(
                      aspectRatio: controller.camera.value.aspectRatio,
                      child: CameraPreview(controller.camera),
                    )
                  : Container(),
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () => controller.disposeCamera(),
        child: Icon(Icons.close),
      ),
    );
  }
}