text: import React from 'react';
  import { StyleSheet, Text, View, TouchableHighlight } from 'react-native';
  
  export default class App extends React.Component {
    constructor(props) {
      super(props);
      this.state = { txt: 'Hellp World' };
    }
  
    onPress() {
      alert(this.state.txt);
    }
  
    render() {
      return (
        <View style={styles.container}>
          <TouchableHighlight
            style={styles.button}
            onPress={this.onPress.bind(this)}
          >
            <Text> Touch Here </Text>
          </TouchableHighlight>
        </View>
      );
    }
  }
  
  const styles = StyleSheet.create({
    container: {
      flex: 1,
      backgroundColor: '#fff',
      alignItems: 'center',
      justifyContent: 'center',
    },
    botton: {
      width: 200,
      height: 50,
      alignItems: 'center',
      justifyContent: 'center',
    }
  });
  