React Native ProgressBarAndroid

In this article, we are going to discuss how to create a Progress Bar for Android applications. We will be using the React Native component ProgressBarAndroid.

Syntax:

<View>
   // Other Component
  <ProgressBarAndroid/>
   // Other Component
<View>

ProgressBarAndroid Props:

• animating: Boolean value which specifies whether to show the progress bar or not.
• color: It specifies the color of the progress bar.
• indeterminate: It is used to show indeterminate progress.
• progress: It specifies the progress value as a number.
• styleAttr: It specifies the style of the ProgressBar Android component. It can have Horizontal, Normal (default), Small, Large, Inverse, SmallInverse, and LargeInverse as value.
• testID: It is used to locate this view in end-to-end tests.

Now let’s start with the implementation:

• Step 1: Open your terminal and install expo-cli by the following command.

  npm install -g expo-cli

• Step 2: Now create a project by the following command.

  expo init ProgressBarAndroidDemo

• Step 3: Now go into your project folder i.e. ProgressBarAndroidDemo using the following command.

  cd ProgressBarAndroidDemo

Project Structure: It will look like the following.

Example: Now let’s implement the ProgressBarAndroid. Here we have shown a simple loader animation, and after it ends, we have shown a text to the user.

App.js

import React, { useState } from 'react';
import {
  StyleSheet, Text, View, ProgressBarAndroid,
  TouchableWithoutFeedback
} from 'react-native';

export default function App() {

  // State to hold current value
  const [val, setVal] = useState(true);

  return (
    <View style={styles.container}>
      <TouchableWithoutFeedback onPress={() => { setVal(false); }}
        style={{ flex: 1 }}>
        <View style={{
          flex: 1, justifyContent: 'center',
          alignItems: 'center'
        }}>
          <ProgressBarAndroid animating={val} color="blue"
            styleAttr='LargeInverse' />
          {!val && <Text>App has finished loading</Text>}
        </View>
      </TouchableWithoutFeedback>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    alignItems: 'center',
    justifyContent: 'center',
  },
});

Start the server by using the following command.

npm run android

Output: If your emulator did not open automatically then you need to do it manually. First, go to your android studio and run the emulator. Now start the server again.

Reference:  https://reactnative.dev/docs/progressbarandroid