react-native button-radio

ButtonRadio.txt

export default class ButtonRadio extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            itemSelected: 1,
            multiItemSelected: [1, 2]
        };
    }
    render() {
        return (
            <FlatList
                data={this.props.arrData}
                renderItem={this._renderItem}
                extraData={this.state}
                ItemSeparatorComponent={() =>
                    <View style={{ height: 0.2, backgroundColor: 'grey' }} />}
            />
        )
    }
    _renderItem = ({ item }) => {
        return (
            <TouchableOpacity activeOpacity={1}
                style={{
                    height: 50, justifyContent: 'center',
                    backgroundColor: (!this.props.isMultichoice) ? ((this.state.itemSelected === item.key) ? 'grey' : 'white')
                        : (this.state.multiItemSelected.includes(item.key) ? 'grey' : 'white')
                }}
                onPress={() => {
                    this.setState({ itemSelected: item.key })
                }}>
                <View>
                    <Text style={{ marginLeft: 20 }}>{item.value}</Text>
                </View>
            </TouchableOpacity >
        );
    }
}