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I'm trying to use RNCamera in a simple project to make use of my device camera. But I get the following error on my android device -

Attempt to invoke vitual method 'com.facebook.react.uimanager.events.EventDispatcher.facebook.react.uimanager.UiManagerModule.getEventDispatcher()' on a null object reference

I'm on RN 0.76.6

This is App.js

import React from 'react';
import Camera from './components/Camera';
import { SafeAreaView } from 'react-native';

const App = () => {
  return (
    <SafeAreaView style={{ flex: 1 }}>
      <Camera />
    </SafeAreaView>
  );
};

export default App;

Here is my Camera.js

import React, {PureComponent} from 'react';import {RNCamera} from 'react-native-camera';
export default class Camera extends PureComponent {  constructor(props) {
  super(props);}
render() {
  return (
    <RNCamera 
      ref={ref => {
        this.camera = ref;
      }}
      captureAudio={false}
      style={{flex: 1}}
      type={RNCamera.Constants.Type.back}
      androidCameraPermissionOptions={{
        title: 'Permission to use camera',
        message: 'We need your permission to use your camera',
        buttonPositive: 'Ok',
        buttonNegative: 'Cancel',
      }} />
    );
  }}

And finally my package.json

{
  "name": "AwesomeCamera",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "android": "react-native run-android",
    "ios": "react-native run-ios",
    "lint": "eslint .",
    "start": "react-native start",
    "test": "jest"
  },
  "dependencies": {
    "react": "18.3.1",
    "react-native": "0.76.6",
    "react-native-camera": "^4.2.1",
    "react-native-vector-icons": "^10.2.0"
  },
  "devDependencies": {
    "@babel/core": "^7.25.2",
    "@babel/preset-env": "^7.25.3",
    "@babel/runtime": "^7.25.0",
    "@react-native-community/cli": "15.0.1",
    "@react-native-community/cli-platform-android": "15.0.1",
    "@react-native-community/cli-platform-ios": "15.0.1",
    "@react-native/babel-preset": "0.76.6",
    "@react-native/eslint-config": "0.76.6",
    "@react-native/metro-config": "0.76.6",
    "@react-native/typescript-config": "0.76.6",
    "@types/react": "^18.2.6",
    "@types/react-test-renderer": "^18.0.0",
    "babel-jest": "^29.6.3",
    "eslint": "^8.19.0",
    "jest": "^29.6.3",
    "prettier": "2.8.8",
    "react-test-renderer": "18.3.1",
    "typescript": "5.0.4"
  },
  "engines": {
    "node": ">=18"
  }
}

本文标签: react nativeAttempt to invoke virtual method on a null object reference RNCamera issueStack Overflow