Contents
GridView has the same popularity as Listview, both are used to arrange the items in a proper manner. So here is the Example of GridView using FlatList in React Native.
GridView can be used when we have to make a View Group that displays items in a two-dimensional, scrollable grid. The most usable example of the Grid is the image gallery where we have to showcase all the images. In this example, we will use FlatList to make our GridView. React Native FlatList is a simple list. It is among the simple but mostly used components.
To Import FlatList in Code
import { FlatList} from 'react-native'
Render Using
<FlatList
data={this.state.dataSource}
renderItem={({ item }) => (
<View
style={{
flex: 1,
flexDirection: 'column',
margin: 1
}}>
<Image
style={styles.imageThumbnail}
source={{ uri: item.src }}
/>
</View>
)}
//Setting the number of column
numColumns={3}
keyExtractor={(item, index) => index.toString()}
/>
In this example of GridView, we will make a simple image gallery to showcase the images in the GridView. So let’s get started.
To Make a React Native App
Getting started with React Native will help you to know more about the way you can make a React Native project. We are going to use react-native init to make our React Native App. Assuming that you have node installed, you can use npm to install the react-native-cli
command line utility. Open the terminal and go to the workspace and run
npm install -g react-native-cli
Run the following commands to create a new React Native project
react-native init ProjectName
If you want to start a new project with a specific React Native version, you can use the --version argument:
react-native init ProjectName --version X.XX.X
react-native init ProjectName --version react-native@next
This will make a project structure with an index file named App.js in your project directory.
Code
Open App.js in any code editor and replace the code with the following code
App.js
// Example of GridView using FlatList in React Native
// https://aboutreact.com/example-of-gridview-using-flatlist-in-react-native/
// import React in our code
import React, {useEffect} from 'react';
// import all the components we are going to use
import {
SafeAreaView,
StyleSheet,
View,
FlatList,
Image
} from 'react-native';
const App = () => {
const [dataSource, setDataSource] = useState([]);
useEffect(() => {
let items = Array.apply(null, Array(60)).map((v, i) => {
return {
id: i,
src: 'http://placehold.it/200x200?text=' + (i + 1)
};
});
setDataSource(items);
}, []);
return (
<SafeAreaView style={styles.container}>
<FlatList
data={dataSource}
renderItem={({item}) => (
<View
style={{
flex: 1,
flexDirection: 'column',
margin: 1
}}>
<Image
style={styles.imageThumbnail}
source={{uri: item.src}}
/>
</View>
)}
//Setting the number of column
numColumns={3}
keyExtractor={(item, index) => index}
/>
</SafeAreaView>
);
};
export default App;
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
backgroundColor: 'white',
},
imageThumbnail: {
justifyContent: 'center',
alignItems: 'center',
height: 100,
},
});
To Run the React Native App
Open the terminal again and jump into your project using.
cd ProjectName
To run the project on an Android Virtual Device or on real debugging device
react-native run-android
or on the iOS Simulator by running (macOS only)
react-native run-ios
Output Screenshots
Output in Online Emulator
That was React Native GridView using FlatList. If you have any doubts or you want to share something about the topic you can comment below or contact us here. There will be more posts coming soon. Stay tuned!
Hope you liked it. 🙂
Worked
Thanks Bro 🙂
Ty!
You’ve got useState to set the items rather than useEffect(). I changed that and it worked! Great job.
updated the same, thank for letting us know. 🙂