this is a react-native library for launching the application when the application is closed . usually we can use this in headless js . (like fcm background messaging and etc)

$ npm install react-native-launch-application --save

$ react-native link react-native-launch-application

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1. Open up android/app/src/main/java/[...]/MainApplication.java

• Add import com.reactlibrary.SajjadLaunchApplicationPackage; to the imports at the top of the file
• Add new SajjadLaunchApplicationPackage() to the list returned by the getPackages() method

2. Append the following lines to android/settings.gradle:

   include ':react-native-launch-application'
   project(':react-native-launch-application').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-launch-application/android')
   

3. Insert the following lines inside the dependencies block in android/app/build.gradle:

     compile project(':react-native-launch-application')
   

You can use this library in headless js for example launching the application when a notification received even if your app swiped out . even if your screen locked.

import SajjadLaunchApplication from 'react-native-launch-application';
import type {RemoteMessage} from 'react-native-firebase';


//PackageName Must Be String For example "com.domain.application"
export default async (message: RemoteMessage) => {
    SajjadLaunchApplication.open(PackageName);
}