How to display loading indicator in React Native?

React NativeJavascriptMobile Development

Loading indicator is used when we want to tell the user the request they made on the UI will take time. In case the user has clicked on the submit button after filling the form, or has clicked on the search button to get some data.

ReactNative offers an ActivityIndicator component that has different ways to show loading indicators on the UI.

The basic ActivityIndicator component is as follows −

<ActivityIndicator animating = {animating} color = '#bc2b78' size = "large"
style = {yourstyle}/>

To work with ActivityIndicator you need to import it as follows −

import { ActivityIndicator} from 'react-native';

Here are some of the important properties available with ActivityIndicator.

Sr.NoProps & Description
1animating
For animating the loading indicator.It takes boolean value true to show the indicator and false to hide it.
2color
Color to be shown for the loading indicator.
3hidesWhenStopped
To stop the indicator when not animation.The value is true/false.
4size
Size of the indicator.The values are small and large.

Example: Display of loading Indicator

The loading indicator is achieved using ActivityIndicator so import that first −

import { ActivityIndicator, View, StyleSheet } from 'react-native';

Here is the ActivityIndicator component that is used −

<ActivityIndicator
   animating = {animating}
   color = '#bc2b78'
   size = "large"
style = {styles.activityIndicator}/>

The animating is set to animating variable which by default is set to true. The method closeActivityIndicator is called inside componentDidMount() function that will set animating state to false after 1 min.

state = { animating: true }
   closeActivityIndicator = () => setTimeout(() => this.setState({
   animating: false }), 60000)
   componentDidMount = () => this.closeActivityIndicator()

Here is a full code to display loading indicator −

import React, { Component } from 'react';
import { ActivityIndicator, View, StyleSheet } from 'react-native';
class ActivityIndicatorExample extends Component {
   state = { animating: true }
   closeActivityIndicator = () => setTimeout(() => this.setState({
   animating: false }), 60000)
   componentDidMount = () => this.closeActivityIndicator()
   render() {
      const animating = this.state.animating
      return (
         <View style = {styles.container}>
            <ActivityIndicator
               animating = {animating}
               color = '#bc2b78'
               size = "large"
               style = {styles.activityIndicator}/>
         </View>
      )
   }
}
export default ActivityIndicatorExample
const styles = StyleSheet.create ({
   container: {
      flex: 1,
      justifyContent: 'center',
      alignItems: 'center',
      marginTop: 70
   },
   activityIndicator: {
      flex: 1,
      justifyContent: 'center',
      alignItems: 'center',
      height: 80
   }
})

Output

raja
Published on 01-Jul-2021 08:23:04
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