Integrating the [camera](https://pub.dev/packages/camera) plugin with version 0.11.2 keeps logging ImageReader_JNI warning: W/ImageReader_JNI(10607): Unable to acquire a buffer item, very likely client tried to acquire more than maxImages buffers #179129
Description
Steps to reproduce
- Add
cameraplugin with version0.11.2 - Open the in-app camera on Android
- Push another screen on top of this camera page
Expected results
No warning logs.
Actual results
Infinite warning logs of the following line:
W/ImageReader_JNI(10607): Unable to acquire a buffer item, very likely client tried to acquire more than maxImages buffers
Code sample
Code sample
import "dart:async";
import "package:camera/camera.dart";
import "package:flutter/material.dart";
Future<void> main() async {
WidgetsFlutterBinding.ensureInitialized();
final cameras = await availableCameras();
runApp(MyApp(cameras: cameras));
}
class MyApp extends StatelessWidget {
const MyApp({required this.cameras, super.key});
final List<CameraDescription> cameras;
@override
Widget build(BuildContext context) {
return MaterialApp(
title: "ImageReader_JNI repro",
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.green),
useMaterial3: true,
),
home: HomePage(cameras: cameras),
);
}
}
class HomePage extends StatelessWidget {
const HomePage({required this.cameras, super.key});
final List<CameraDescription> cameras;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text("Home")),
body: Center(
child: ElevatedButton(
onPressed: () {
Navigator.of(context).push(
MaterialPageRoute(
builder: (_) => CameraPreviewPage(cameras: cameras),
),
);
},
child: const Text("Open camera page"),
),
),
);
}
}
class CameraPreviewPage extends StatefulWidget {
const CameraPreviewPage({required this.cameras, super.key});
final List<CameraDescription> cameras;
@override
State<CameraPreviewPage> createState() => _CameraPreviewPageState();
}
class _CameraPreviewPageState extends State<CameraPreviewPage> {
CameraController? _controller;
bool _initializing = true;
String? _error;
@override
void initState() {
super.initState();
_startCamera();
}
Future<void> _startCamera() async {
if (widget.cameras.isEmpty) {
setState(() {
_error = "No cameras found on this device.";
_initializing = false;
});
return;
}
try {
final controller = CameraController(
widget.cameras.first,
ResolutionPreset.medium,
enableAudio: false,
);
await controller.initialize();
if (!mounted) {
await controller.dispose();
return;
}
setState(() {
_controller = controller;
_initializing = false;
});
} catch (e) {
setState(() {
_error = "Failed to start camera: $e";
_initializing = false;
});
}
}
@override
void dispose() {
_controller?.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text("Camera preview")),
body: Column(
children: [
Padding(
padding: const EdgeInsets.all(12),
child: Text(
"Steps to repro:\n1. Open this camera page.\n2. Tap \"Push next screen\" below without closing the preview.\n3. Watch logcat for repeated \"ImageReader_JNI: Unable to acquire a buffer item\" warnings while the next screen is visible.",
),
),
Expanded(child: Center(child: _buildPreview())),
Padding(
padding: const EdgeInsets.all(12),
child: ElevatedButton(
onPressed: () {
Navigator.of(
context,
).push(MaterialPageRoute(builder: (_) => const SecondPage()));
},
child: const Text("Push next screen (preview keeps running)"),
),
),
],
),
);
}
Widget _buildPreview() {
if (_error != null) {
return Text(_error!);
}
if (_initializing) {
return const CircularProgressIndicator();
}
final controller = _controller;
if (controller == null || !controller.value.isInitialized) {
return const Text("Controller not initialized");
}
return AspectRatio(
aspectRatio: controller.value.aspectRatio,
child: CameraPreview(controller),
);
}
}
class SecondPage extends StatelessWidget {
const SecondPage({super.key});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text("Second page")),
body: const Center(
child: Text(
"This page sits on top of the running camera preview.\n"
"On some Android devices, logcat starts spamming the ImageReader_JNI warning while this page is visible.",
textAlign: TextAlign.center,
),
),
);
}
}Screenshots or Video
Logs
Logs
W/ImageReader_JNI(10607): Unable to acquire a buffer item, very likely client tried to acquire more than maxImages buffersFlutter Doctor output
Doctor output
Doctor summary (to see all details, run flutter doctor -v):
[!] Flutter (Channel [user-branch], 3.32.8, on macOS 26.1 25B78 darwin-arm64, locale
en-US)
! Flutter version 3.32.8 on channel [user-branch] at /opt/homebrew/share/flutter
Currently on an unknown channel. Run `flutter channel` to switch to an official
channel.
If that doesn't fix the issue, reinstall Flutter by following instructions at
https://flutter.dev/setup.
! Upstream repository unknown source is not a standard remote.
Set environment variable "FLUTTER_GIT_URL" to unknown source to dismiss this
error.
[✓] Android toolchain - develop for Android devices (Android SDK version 36.1.0)
[✓] Xcode - develop for iOS and macOS (Xcode 26.0.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2025.1)
[✓] VS Code (version 1.106.1)
[✓] Connected device (4 available)
[✓] Network resources
! Doctor found issues in 1 category.