$ npm install react-native-wrathys-lib-demo --save

$ react-native link react-native-wrathys-lib-demo

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

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

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

   include ':react-native-wrathys-lib-demo'
   project(':react-native-wrathys-lib-demo').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-wrathys-lib-demo/android')
   

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

     implementation project(':react-native-wrathys-lib-demo')
   

import RNWrathysLibDemo from 'react-native-wrathys-lib-demo';

RNWrathysLibDemo.show("Test toast", RNWrathysLibDemo.SHORT);
// or
RNWrathysLibDemo.show("Test toast", RNWrathysLibDemo.LONG);