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Description:

flutter uvc camera

flutter_uvc_camera #
A Flutter plugin based on AndroidUSBCamera to enable Flutter apps to use external cameras.
pub：flutter_uvc_camera
Preface #

Only supports Android
Android 10 need to reduce targetSdkVersion to 27
Discovering problematic models：Redmi Note 10

Getting Started #
1. Add Dependency #
Add the flutter_uvc_camera plugin dependency to your Flutter project's pubspec.yaml file:
dependencies:
flutter_uvc_camera: last_version
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2. Configure Android Project #
Before using this plugin, some configurations are needed for the Android project.
Add Permissions #
Add the following permissions to the AndroidManifest.xml file of your Android project:
<uses-permission android:name="android.permission.USB_PERMISSION" />
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-feature android:name="android.hardware.usb.host" />
<uses-feature android:name="android.hardware.camera"/>
<uses-feature android:name="android.hardware.camera.autofocus"/>

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Add maven { url "https://jitpack.io" } in android/build.gradle:
allprojects {
repositories {
/// other repositories
maven { url "https://jitpack.io" }
}
}
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Add Intent Filter and Meta-data for Device Insertion Detection, Plug-in Monitoring, and Recognition of Opening Applications
Android documents USB host overview
Add an action for USB device connection in the intent-filter of mainActivity, and reference the corresponding XML file in meta-data:
<intent-filter>
<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
</intent-filter>
<meta-data
android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
android:resource="@xml/device_filter" />
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<?xml version="1.0" encoding="utf-8"?>

<resources>
<usb-device vendor-id="1234" product-id="5678" class="255" subclass="66" protocol="1" />
</resources>
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3. Usage Example #
import 'package:flutter/material.dart';
import 'package:flutter_uvc_camera/uvc_camera_controller.dart';
import 'package:flutter_uvc_camera/uvc_camera_view.dart';

class CameraTest extends StatefulWidget {
const CameraTest({super.key});

@override
State<CameraTest> createState() => _CameraTestState();
}

class _CameraTestState extends State<CameraTest> {
UVCCameraController? cameraController;

@override
void initState() {
super.initState();
cameraController = UVCCameraController();
cameraController?.msgCallback = (state) {
showCustomToast(state);
};
}

@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('UVC Camera Example'),
),
body: Center(
child: UVCCameraView(
cameraController: cameraController!,
width: 300,
height: 300),
),
),
);
}
}
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Problems #
add proguard-rules.pro #
flutter run release encounters a NoSuchMethodError

example/android/app/build.gradle

buildTypes {
release {

proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
minifyEnabled true
}
}
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example/android/app/proguard-rules.pro

-keep class com.jiangdg.uvc.UVCCamera {
native <methods>;
long mNativePtr;
}
-keep class com.jiangdg.uvc.IStatusCallback {
*;
}
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Notes #

Ensure that the required permissions are configured before using the plugin, otherwise the plugin may not function
properly.
The plugin currently supports using external cameras in Flutter projects but may have some limitations and
compatibility issues. Please test and adjust the plugin according to your needs.

Issue Reporting #
If you encounter any problems or have any suggestions during usage, please report them on
GitHub Issues .