MyAwesomeButton.js

import React, { Component } from 'react';
import { TouchableOpacity, View, Text } from 'react-native';

export default class MyAwesomeButton extends Component {
  render() {
    return (
      <View>
        <TouchableOpacity
          style={{
            backgroundColor: this.props.backgroundColor,
            color: this.props.fontColor
          }}
          onPress={this.props.onPress()}
        >
          <Text>{this.props.buttonText></Text>
        </TouchableOpacity>
      </View>
    )
  }
}