leaksample.js

class Composer extends Component {
  state = { showAccessory: false }
  componentDidMount() {
    Keyboard.addListener('keyboardDidShow', () => this.setState({ showAccessory: true }));
    Keyboard.addListener('keyboardDidHide', () => this.setState({ showAccessory: false }));
  }

  render() {
    return (
      <View>
        <EditTextComponent />
        (this.state.showAccessory && <AccessoryView />)
      </View>
    );
  }
}