ShanikaNishadhi

...
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
...

ShanikaNishadhi

ext {
        googlePlayServicesVersion = "+" // default: "+"
        firebaseMessagingVersion = "+" // default: "+"
 
        buildToolsVersion = "29.0.2"
        minSdkVersion = 16
        compileSdkVersion = 29
        targetSdkVersion = 29
    }

ShanikaNishadhi

DeviceInfo.getBatteryLevel().then(batteryLevel => {
    // 0.759999
});

ShanikaNishadhi

DeviceInfo.getAndroidId().then(androidId => {
    // androidId here
});

ShanikaNishadhi

import { PermissionsAndroid } from 'react-native';
import Contacts from 'react-native-contacts';
 
PermissionsAndroid.request(
  PermissionsAndroid.PERMISSIONS.READ_CONTACTS,
  {
    'title': 'Contacts',
    'message': 'Let us us access your contacts',
    'buttonPositive': 'Please accept'
  }

ShanikaNishadhi

class App extends Component {
  render() {
    return (
      <View style={styles.container}>
        <RNCamera
          style={{ flex: 1, alignItems: 'center' }}
          ref={ref => {
            this.camera = ref
          }}
        />

ShanikaNishadhi

import {check, PERMISSIONS, RESULTS} from 'react-native-permissions';
 
check(PERMISSIONS.IOS.CAMERA)
  .then((result) => {
    switch (result) {
      case RESULTS.UNAVAILABLE:
        console.log(
          'feature is not available',
        );
        break;

ShanikaNishadhi

DeviceInfo.isCameraPresent()
  .then(isCameraPresent => {
    // true or false
  })
  .catch(cameraAccessException => {
    // is thrown if a camera device could not be queried or opened by the CameraManager on Android
  });

ShanikaNishadhi

import React from "react"
 
const ComponentOne = ({ children }) => {
  return (
    <div>
      <h5>This is the component one</h5>;
     { children }
    </div>
  );
}

ShanikaNishadhi

const App = () => {
const content = "Which component is using the content?";
return (
    <div className="App">
        <ComponentOne>
            <ComponentTwo>
                <ComponentThree>
                    <ComponentUsingProps content={content}  />
                <ComponentThree>
            </ComponentTwo>