React Native Background Timer Workmanager [Android]

Emit event periodically in both foreground and background.

Installation

1. If you use Expo to create a project you'll just need to "eject".

   expo eject

2. Install React Native Background Timer Work Manager package.

   yarn add react-native-background-timer-workmanager
   # or using npm
   npm install react-native-background-timer-workmanager --save

3. Link React Native Background Timer library. This step is not necessary when you use React Native >= 0.60 (and your app is not ejected from Expo).

   react-native link react-native-background-timer-workmanager

4. Link the library manually if you get errors:

• android/settings.gradle

  + include ':react-native-background-timer-workmanager'
  + project(':react-native-background-timer-workmanager').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-background-timer-workmanager/android')

• android/app/build.gradle

  dependencies {
  +   implementation project(':react-native-background-timer-workmanager')
  }

• android/app/src/main/java/com/your-app/MainApplication.java

  + import com.shubhamd99.timer.BackgroundTimerPackage;
  
  @Override
  protected List<ReactPackage> getPackages() {
    return Arrays.<ReactPackage>asList(
  +   new BackgroundTimerPackage()
    );
  }

Usage

import BackgroundTimer from 'react-native-background-timer-workmanager';

BackgroundTimer.start(3000, 'UNIQUE_TAG' () => { 
// code that will be called every 3 seconds 
});

BackgroundTimer.stop('UNIQUE_TAG'); // To Stop Polling

Example:

import React, {useEffect} from 'react';

const App = () => {
    useEffect(() => {
        BackgroundTimer.start(10000, 'homeScreenPolling', () => {
            console.log('polling..');
        });
        return () => BackgroundTimer.stop('homeScreenPolling');
    }, []);
};

export default App;