With Hidden TextInput

import React , { Component } from 'react';
import { View, TextInput, Alert, TouchableOpacity, Text, Keyboard} from 'react-native';
import CustomTextInput from './CustomTextInput';

class otpandcvv extends Component {

    state = { inputValue: [] };

    constructor(props) {
        super(props);
        this.maxCharLength = 6;
        this.inputDict = {};
    }

    changeFocusToNext(id) {
        if (id + 1 !== this.maxCharLength) {
            this.refs[id + 1].focus();
        }
    }

    changeFocusToPrevious(id) {
        if (id === 0) {
            this.refs[0].focus();
        } else {
            this.refs[id - 1].focus();
        }
    }

    onChange(text, j) {
        let newText = '';
        let numbers = '0123456789';
        for (let i = 0; i < text.length; i++) {
            if(numbers.indexOf(text[i]) > -1) {
                newText = newText + text[i];
            }
        }
        this.inputDict[j] = newText;
        if (text.trim().replace(/\s+/g, ''.length !== 0)) {
            this.changeFocusToNext(j);
        } else {
            this.changeFocusToPrevious(j);
        }
    }

    onButtonPress() {
        if (Object.keys(this.inputDict).length !== this.maxCharLength) {
            Alert.alert('Enter all field');
            return;
        }
        let enteredText = '';
        for (let i = 0; i < Object.keys(this.inputDict).length; i++) {
            if (this.inputDict[i] !== '') {
                enteredText = enteredText + this.inputDict[i];
            } else {
                Alert.alert('Enter All Field Correctly')
                return;
            }
        }
       Alert.alert('You have entered ' + enteredText);
    }

    onHiddenTextChange(text) {
        this.setState({
            inputValue: text
        })
    }

    render() {
        let customTextInput = [];
        for (let i = 0; i < this.maxCharLength; i++) {
            customTextInput.push(
                <TextInput
                    ref={i}
                    key={i}
                    style={styles.textInputStyle}
                    maxLength={1}
                    underlineColorAndroid='transparent'
                    keyboardType='numeric'
                    returnKeyType='next'
                    placeholder='.'
                    value={this.state.inputValue[i]}
                    onFocus={Keyboard.dismiss}
                    onKeyPress={(keyPress) => console.log(keyPress)}
                    onChangeText={text => this.onChange(text, i)}
                />
            );
        }

        return (
            <View style={{ flex: 1}}>
                <TextInput
                    style={styles.hiddenTextInput}
                    maxLength={this.maxCharLength}
                    keyboardType='numeric'
                    autoFocus={true}
                    onChangeText={text => this.onHiddenTextChange(text)}
                />
                <View style={styles.containerStyles}>
                    <View style={{flexDirection: 'row', paddingLeft: 15, paddingRight: 15}}>
                        {customTextInput}
                    </View>
                </View>
                <TouchableOpacity
                    style={{width: 196, height: 48, marginTop: 10, alignSelf: 'center'}}
                    onPress={this.onButtonPress.bind(this)}>
                    <View style={{ alignSelf: 'center' }}>
                        <Text>Click Here</Text>
                    </View>
                </TouchableOpacity>
            </View>
        );
    }
}

const styles = {
    containerStyles: {
        width: 196,
        height: 48,
        marginTop: 2,
        borderRadius: 4,
        alignSelf: 'center',
        backgroundColor: '#eff1f4'
    },
    hiddenTextInput: {
        opacity: 0.1,
        height: 48,
        width: 80,
        marginTop: 100,
        alignSelf: 'center'
    },
    textInputStyle: {
        width: 28,
        height: 32,
        fontSize: 24,
        marginTop: 8,
        marginBottom: 8,
        paddingTop: 0,
        paddingBottom: 0,
    }
}

export default otpandcvv;