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I am working on a React Native project using React Native 0.77.1 and trying to use the camera in my app. I have installed react-native-camera (version 4.2.1) and set up permissions correctly, but I am facing issues when trying to open the camera.
Problem:
- The camera opens but immediately closes.
- I get the error: "Attempt to invoke virtual method 'module.getEventDispatcher' on a null object reference"
- Sometimes, the camera just shows a loading indicator and does not open properly.
My Setup:
package.json
"dependencies": { "react": "18.3.1", "react-native": "0.77.1", "react-native-camera": "^4.2.1", "react-native-permissions": "^5.2.5", "react-native-qrcode-scanner": "^1.5.5" }
Android Permissions (AndroidManifest.xml)
Camera Component Code (CameraScreen.tsx)
import React, { useState, useRef, useEffect } from 'react';
import { View, Alert, Button, Platform } from 'react-native';
import { RNCamera } from 'react-native-camera';
import { request, PERMISSIONS, RESULTS } from 'react-native-permissions';
const CameraScreen = () => {
const [hasPermission, setHasPermission] = useState<boolean | null>(null);
const cameraRef = useRef<RNCamera>(null);
useEffect(() => {
const requestCameraPermission = async () => {
const permission =
Platform.OS === 'android'
? PERMISSIONS.ANDROID.CAMERA
: PERMISSIONS.IOS.CAMERA;
const result = await request(permission);
setHasPermission(result === RESULTS.GRANTED);
};
requestCameraPermission();
}, []);
return (
<View style={{ flex: 1 }}>
{hasPermission ? (
<RNCamera
ref={cameraRef}
style={{ flex: 1 }}
type={RNCamera.Constants.Type.back}
onCameraReady={() => console.log('Camera is ready')}
captureAudio={false}
/>
) : (
<Button title="Request Camera Permission" onPress={() => requestCameraPermission()} />
)}
</View>
);
};
export default CameraScreen;
- Verified permissions (react-native-permissions returns GRANTED).
- Ensured that the app has minSdkVersion 21 in android/build.gradle.
- Manually linked react-native-camera using react-native link react-native-camera.
- Cleaned and rebuilt the project using ./gradlew clean && react-native run-android.
- Tried upgrading react-native-camera to the latest version.
- Considered switching to react-native-vision-camera
本文标签: How to Properly Use Camera in React Native 077 (Latest Version)Stack Overflow
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