React native snippet. Image Grid Layout

This react native snippet, Image Grid Layout , was created to help android and ios developers save time
while they build native mobile apps using JavaScript and React
use it in your project and build your app faster

React native code

Copy, paste and run the following code to get a result like the one shown in the image

import React from 'react';
import { 
  StyleSheet, 
  Text, 
  View, 
  FlatList, 
  Dimensions,
  TouchableOpacity,
  Image,
  Modal,
  ScrollView
} from 'react-native';

export default class App extends React.Component {

  constructor(props) {
    super(props);
    this.state = {
      numColumns:3,
      userSelected:{},
      modalVisible:false,
      data: [
        {id:1,  image:"https://bootdey.com/img/Content/avatar/avatar1.png"}, 
        {id:2,  image:"https://bootdey.com/img/Content/avatar/avatar2.png"}, 
        {id:3,  image:"https://bootdey.com/img/Content/avatar/avatar3.png"}, 
        {id:4,  image:"https://bootdey.com/img/Content/avatar/avatar4.png"}, 
        {id:5,  image:"https://bootdey.com/img/Content/avatar/avatar5.png"}, 
        {id:6,  image:"https://bootdey.com/img/Content/avatar/avatar6.png"}, 
        {id:7,  image:"https://bootdey.com/img/Content/avatar/avatar7.png"}, 
        {id:8,  image:"https://bootdey.com/img/Content/avatar/avatar1.png"}, 
        {id:9,  image:"https://bootdey.com/img/Content/avatar/avatar2.png"}, 
        {id:10, image:"https://bootdey.com/img/Content/avatar/avatar3.png"},
      ]
    };
  }

  clickEventListener = (item) => {
    this.setState({userSelected: item}, () =>{
      this.setModalVisible(true);
    });
  }

  setModalVisible(visible) {
    this.setState({modalVisible: visible});
  }

  renderItem = ({item, index}) => {
    if (item.empty === true) {
      return <View style={[styles.item, styles.itemInvisible]} />;
    }
    var itemDimension = Dimensions.get('window').width / this.state.numColumns;
    return (
      <TouchableOpacity style={[styles.item, {height: itemDimension}]} onPress={() => {this.clickEventListener(item)}}>
        <Image style={{height:itemDimension - 2, width:itemDimension - 2}} source={{uri: item.image}}/>
      </TouchableOpacity>
    );
  }
  
  formatRow = (data, numColumns) => {
    const numberOfFullRows = Math.floor(data.length / numColumns);
    let numberOfElementsLastRow = data.length - (numberOfFullRows * numColumns);
    while (numberOfElementsLastRow !== numColumns && numberOfElementsLastRow !== 0) {
      data.push({ id: `blank-${numberOfElementsLastRow}`, empty: true });
      numberOfElementsLastRow++;
    }
    return data;
  }

  render() {
    return (
      <View style={styles.container}>
        <FlatList
          data={this.formatRow(this.state.data, this.state.numColumns)}
          keyExtractor= {(item) => {
            return item.id;
          }}
          renderItem={this.renderItem}
          numColumns={this.state.numColumns}/>

        <Modal
          animationType={'fade'}
          transparent={true}
          onRequestClose={() => this.setModalVisible(false)}
          visible={this.state.modalVisible}>

          <View style={styles.popupOverlay}>
            <View style={styles.popup}>
              <View style={styles.popupContent}>
                <ScrollView contentContainerStyle={styles.modalInfo}>
                  <Image style={{width:200, height:200}} source={{uri: this.state.userSelected.image}}/>
                </ScrollView>
              </View>
              <View style={styles.popupButtons}>
                <TouchableOpacity onPress={() => {this.setModalVisible(false) }} style={styles.btnClose}>
                  <Text style={styles.txtClose}>Close</Text>
                </TouchableOpacity>
              </View>
            </View>
          </View>
        </Modal>
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    marginVertical: 20,
  },
  item: {
    backgroundColor: '#ffffff',
    alignItems: 'center',
    justifyContent: 'center',
    flex: 1,
  },
  itemInvisible: {
    backgroundColor: 'transparent',
  },

 /************ modals ************/
  popup: {
    backgroundColor: 'white',
    marginTop: 80,
    marginHorizontal: 20,
    borderRadius: 7,
  },
  popupOverlay: {
    backgroundColor: "#00000057",
    flex: 1,
    marginTop: 20
  },
  popupContent: {
    //alignItems: 'center',
    margin: 5,
    height:250,
  },
  popupHeader: {
    marginBottom: 45
  },
  popupButtons: {
    marginTop: 15,
    flexDirection: 'row',
    borderTopWidth: 1,
    borderColor: "#eee",
    justifyContent:'center'
  },
  popupButton: {
    flex: 1,
    marginVertical: 16
  },
  btnClose:{
    height:20,
    backgroundColor:'#20b2aa',
    padding:20
  },
  modalInfo:{
    alignItems:'center',
    justifyContent:'center',
  }
});