Camera: CameraException(Previous capture has not returned yet., takePicture was called before the previous capture returned.)

[HonestElf]

My source code is a little different, but I also tried to run official example and got the same error

Steps to Reproduce

1. copy-paste code from https://docs.flutter.dev/cookbook/plugins/picture-using-camera
2. Run example
3. Press camera button
4. Nothing happens, but camera freezes
5. Press camera button again and get exeption: CameraException(Previous capture has not returned yet., takePicture was called before the previous capture returned.)

Device

Emulator Pixel XL API 33
OS: Android Tiramisu

flutter doctor -v

[√] Flutter (Channel stable, 3.7.3, on Microsoft Windows [Version 10.0.19045.2486], locale ru-RU)
• Flutter version 3.7.3 on channel stable at C:\flutterSDK\flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 9944297 (6 days ago), 2023-02-08 15:46:04 -0800
• Engine revision 248290d6d5
• Dart version 2.19.2
• DevTools version 2.20.1

[X] Windows Version (Unable to confirm if installed Windows version is 10 or greater)

[√] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
• Android SDK at C:\Users\vd.prokudin\AppData\Local\Android\sdk
• Platform android-33, build-tools 33.0.0
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
• All Android licenses accepted.

[√] Chrome - develop for the web
• Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[√] Visual Studio - develop for Windows (Visual Studio Community 2022 17.3.6)
• Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
• Visual Studio Community 2022 version 17.3.32929.385
• Windows 10 SDK version 10.0.20348.0

[√] Android Studio (version 2021.3)
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin can be installed from:
https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)

[√] VS Code (version 1.75.1)
• VS Code at C:\Users\vd.prokudin\AppData\Local\Programs\Microsoft VS Code
• Flutter extension version 3.58.0

[√] Connected device (4 available)
• sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64 • Android 13 (API 33) (emulator)
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.19045.2486]
• Chrome (web) • chrome • web-javascript • Google Chrome 110.0.5481.77
• Edge (web) • edge • web-javascript • Microsoft Edge 109.0.1518.78

[√] HTTP Host Availability
• All required HTTP hosts are available

[exaby73]

Hello @HonestElf. Have you added camera permissions to your manifest file before running the app?

[HonestElf]

I set minSdkVersion to 21 in build.gradle, and allowed сamera and micro when using my app

[exaby73]

@HonestElf Which version of the plugin are you using? You can check which version it's locked to in your pubspec.lock file

[HonestElf]

@exaby73 camera: 0.10.3

[exaby73]

This looks like a duplicate of #113532. Therefore, I am closing this issue. If you disagree, please comment with your reasoning, and I can reopen the issue. Thank you

[HonestElf]

@exaby73 I dont think it is a duplicate. As i see, in the #113532 the problem is in using "pausePreview", which I dont use it in my example

[exaby73]

I cannot reproduce the issue you mentioned. I used the camera example at the end of the referenced page, running on an Android 13 emulator

Code Sample

import 'dart:async';
import 'dart:io';

import 'package:camera/camera.dart';
import 'package:flutter/material.dart';

Future<void> main() async {
  // Ensure that plugin services are initialized so that `availableCameras()`
  // can be called before `runApp()`
  WidgetsFlutterBinding.ensureInitialized();

  // Obtain a list of the available cameras on the device.
  final cameras = await availableCameras();

  // Get a specific camera from the list of available cameras.
  final firstCamera = cameras.first;

  runApp(
    MaterialApp(
      theme: ThemeData.dark(),
      home: TakePictureScreen(
        // Pass the appropriate camera to the TakePictureScreen widget.
        camera: firstCamera,
      ),
    ),
  );
}

// A screen that allows users to take a picture using a given camera.
class TakePictureScreen extends StatefulWidget {
  const TakePictureScreen({
    super.key,
    required this.camera,
  });

  final CameraDescription camera;

  @override
  TakePictureScreenState createState() => TakePictureScreenState();
}

class TakePictureScreenState extends State<TakePictureScreen> {
  late CameraController _controller;
  late Future<void> _initializeControllerFuture;

  @override
  void initState() {
    super.initState();
    // To display the current output from the Camera,
    // create a CameraController.
    _controller = CameraController(
      // Get a specific camera from the list of available cameras.
      widget.camera,
      // Define the resolution to use.
      ResolutionPreset.medium,
    );

    // Next, initialize the controller. This returns a Future.
    _initializeControllerFuture = _controller.initialize();
  }

  @override
  void dispose() {
    // Dispose of the controller when the widget is disposed.
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Take a picture')),
      // You must wait until the controller is initialized before displaying the
      // camera preview. Use a FutureBuilder to display a loading spinner until the
      // controller has finished initializing.
      body: FutureBuilder<void>(
        future: _initializeControllerFuture,
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.done) {
            // If the Future is complete, display the preview.
            return CameraPreview(_controller);
          } else {
            // Otherwise, display a loading indicator.
            return const Center(child: CircularProgressIndicator());
          }
        },
      ),
      floatingActionButton: FloatingActionButton(
        // Provide an onPressed callback.
        onPressed: () async {
          // Take the Picture in a try / catch block. If anything goes wrong,
          // catch the error.
          try {
            // Ensure that the camera is initialized.
            await _initializeControllerFuture;

            // Attempt to take a picture and get the file `image`
            // where it was saved.
            final image = await _controller.takePicture();

            if (!mounted) return;

            // If the picture was taken, display it on a new screen.
            await Navigator.of(context).push(
              MaterialPageRoute(
                builder: (context) => DisplayPictureScreen(
                  // Pass the automatically generated path to
                  // the DisplayPictureScreen widget.
                  imagePath: image.path,
                ),
              ),
            );
          } catch (e) {
            // If an error occurs, log the error to the console.
            print(e);
          }
        },
        child: const Icon(Icons.camera_alt),
      ),
    );
  }
}

// A widget that displays the picture taken by the user.
class DisplayPictureScreen extends StatelessWidget {
  final String imagePath;

  const DisplayPictureScreen({super.key, required this.imagePath});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Display the Picture')),
      // The image is stored as a file on the device. Use the `Image.file`
      // constructor with the given path to display the image.
      body: Image.file(File(imagePath)),
    );
  }
}