React Native - Flexbox - Mobile App Development

Flexbox is a layout technique that is utilized to structure the layout of our application in a responsive manner.
Flexbox provides three main properties to achieve the desired layout. These properties are flexDirection, justifyContent, and alignItems.
flexDirection (column, row): Used to align its elements vertically or horizontally.
justifyContent (center, flex-start, flex-end, space-around, space-between): Used to distribute the elements inside the container.
alignItems (center, flex-start, flex-end, stretched): Used to distribute the element inside the container along the secondary axis.

Our demo app screen will look like this −

flexDirection(row)


Implementation

First, You must set up your local development environment. Follow the below link to set up your local environment.
After executing the commands mentioned in this link, a folder with a specified name is created with the following contents.



Edit the  App.js file and write the below code. 

App.js

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

export default class App extends React.Component {

render() {
return (
<View style={styles.container}>
<View style={styles.purpleBox} />
<View style={styles.greenBox} />
<View style={styles.orangeBox} />
<View style={styles.blueBox} />
</View>
)
}
}
const styles = StyleSheet.create({
container: {
flexDirection: 'row',
justifyContent: 'center',
alignItems: 'center',
backgroundColor: 'white',
height: 700
},
purpleBox: {
width: 110,
height: 110,
backgroundColor: 'purple'
},
greenBox: {
width: 110,
height: 110,
backgroundColor: 'green'
},
orangeBox: {
width: 110,
height: 110,
backgroundColor: 'orange'
},
blueBox:
{
width: 110,
height: 110,
backgroundColor: 'blue'
},
})

flexDirection(column)

App.js

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

export default class App extends React.Component {

render() {
return (
<View style={styles.container}>
<View style={styles.purpleBox} />
<View style={styles.greenBox} />
<View style={styles.orangeBox} />
<View style={styles.blueBox} />
</View>
)
}
}
const styles = StyleSheet.create({
container: {
flexDirection: 'column',
justifyContent: 'center',
alignItems: 'center',
backgroundColor: 'white',
height: 700
},
purpleBox: {
width: 110,
height: 110,
backgroundColor: 'purple'
},
greenBox: {
width: 110,
height: 110,
backgroundColor: 'green'
},
orangeBox: {
width: 110,
height: 110,
backgroundColor: 'orange'
},
blueBox:
{
width: 110,
height: 110,
backgroundColor: 'blue'
},
})

Run

sibinmuhammed@ladmin-H310M-S2:~$ react-native start
sibinmuhammed@ladmin-H310M-S2:~/knf-reactnative/KnowledgeFactoryDemo$ react-native run-android


More...

Popular posts from this blog

Spring boot video streaming example-HTML5

Learn Java 8 streams with an example - print odd/even numbers from Array and List

Spring Boot + Mockito simple application with 100% code coverage

Spring Boot + OpenCSV Export Data to CSV Example

Custom Exception Handling in Quarkus REST API

DataTable-Pagination example with Spring boot, jQuery and ajax

Registration and Login with Spring Boot + Spring Security + Thymeleaf

Node JS mini projects with source code - free download

Spring boot web project free download:User Registration System

Spring Boot + Apache Commons Export Data to CSV Example