FlatList in React Native

 1) FlatList Example in React Native

FlatList:- We use FlatList to show a list of items from JSON or whatever See example data below

import React from 'react';
import { View, StyleSheet, Text, FlatList } from 'react-native';

const DATA = [
  {
    key: 1,
    item: 'Item1',
  },
  {
    key: 2,
    item: 'Item2',
  },
  {
    key: 3,
    item: 'Item3',
  },
  {
    key: 4,
    item: 'Item4',
  },
  {
    key: 5,
    item: 'Item5',
  },
]

function getColor() {
  var ColorCode = 'rgb(' + (Math.floor(Math.random() * 256)) + ',' + (Math.floor(Math.random() * 256)) + ',' + (Math.floor(Math.random() * 256)) + ')';
  return ColorCode;
}

export default function FlatListExample() {

 const renderItem = ({item}) => {
    return(
    <View style={[styles.view1, { backgroundColor: getColor() }]} key={item.key}>
      <Text style={styles.text}>{item.item}</Text>
    </View>
    )
  }
  return (
    <View style={styles.conatainer}>
      <FlatList
        data={DATA}
        renderItem={renderItem}
        keyExtractor={(item) => item.key}
      />
    </View>
  );
}

const styles = StyleSheet.create({
  conatainer: {
    flex:1,
    backgroundColor: 'red'
  },
  view1: {
    height:200,
    alignItems: 'center',
    justifyContent: 'center',
  },
  text: {
    fontSize: 30,
    fontWeight: 'bold',
    color: 'white'
  }
})


OUTPUT:-



2) Display items In multiple columns in FlatList React Native

import React from 'react';
import { View, StyleSheet, Text, FlatList} from 'react-native';

const DATA = [
  {
    key: 1,
    item: 'Item1',
  },
  {
    key: 2,
    item: 'Item2',
  },
  {
    key: 3,
    item: 'Item3',
  },
  {
    key: 4,
    item: 'Item4',
  },
  {
    key: 5,
    item: 'Item5',
  },
  {
    key: 6,
    item: 'Item6',
  },
  {
    key: 7,
    item: 'Item7',
  },
  {
    key: 8,
    item: 'Item8',
  },
  {
    key: 9,
    item: 'Item9',
  },
  {
    key: 10,
    item: 'Item10',
  },
]

function getColor() {
  var ColorCode = 'rgb(' + (Math.floor(Math.random() * 256)) + ',' + (Math.floor(Math.random() * 256)) + ',' + (Math.floor(Math.random() * 256)) + ')';
  return ColorCode;
}

export default function FlatListExample() {
 const renderItem = ({item}) => {
    return(
    <View style={[styles.view1, { backgroundColor: getColor()}]} key={item.key}>
      <Text style={styles.text}>{item.item}</Text>
    </View>
    )
  }
  return (
    <View style={styles.conatainer}>
      <FlatList
        data={DATA}
        renderItem={renderItem}
        keyExtractor={(item) => item.key}
        numColumns={2}
      />
    </View>
  );
}

const styles = StyleSheet.create({
  conatainer: {
    flex:1,
  },
  view1: {
    height:100,
    alignItems: 'center',
    justifyContent: 'center',
    width:'50%'
  },
  text: {
    fontSize: 30,
    fontWeight: 'bold',
    color: 'white'
  }
})

OUTPUT:-




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