how to change text of button in listview in react native?

I am trying to change text of button which is in listview quickly after click on it?

I am trying with following code to implement this but i cant do it i.e its not working. How can i do it? please help.

constructor(props) {
    super(props);
    this.state = {
      button_text:"Connect",
    }
  }

  ConPressed() {
    this.setState({
      button_text: "Connected",
    });
  }

  render() {
    return (
      <ListView
        dataSource={this.state.sa}
        renderRow={(rowData) => 

       <TouchableHighlight onPress={() => this.ConPressed()}>
          <Text>{this.state.button_text}</Text>
       </TouchableHighlight>

      />
    );
  }

export default class ListItem extends Component {
  constructor(props) {
    super(props);

    this.state = {
      button_text: 'Connect',
    }
  }


  ConPressed = () => {
    this.setState({ button_text: 'Connected' });
  }


  render() {
    return (
      <TouchableHighlight onPress={this.ConPressed}>
        <Text>{this.state.button_text}</Text>
      </TouchableHighlight>
    );
  }
}

So now you want to import your ListItem in your original file, and use that in your renderRow.

renderRow={() => <ListItem />}