Install an android APK from your react-native project. This project is based on react-native-android-library-boilerplate and react-native-install-apk

1. Add react-native-apk-installer to your project

• Install directly from npm: npm install --save react-native-apk-installer.
• Or do npm install --save git+https://github.com/null--/react-native-apk-installer.git in your main project.

2. Link the library:

• Add the following to android/settings.gradle:

    include ':react-native-apk-installer'
    project(':react-native-apk-installer').projectDir = new File(settingsDir, '../node_modules/react-native-apk-installer/android')
  

• Add the following to android/app/build.gradle:

    ...
  
    dependencies {
        ...
        compile project(':react-native-apk-installer')
    }

• Add the following to android/app/src/main/java/**/MainApplication.java:

    ...
    import com.cnull.apkinstaller.ApkInstallerPackage;  // add this for react-native-apk-installer
  
    public class MainApplication extends Application implements ReactApplication {
  
        @Override
        protected List<ReactPackage> getPackages() {
            return Arrays.<ReactPackage>asList(
                new MainReactPackage(),
                ...
                new ApkInstallerPackage()     // add this for react-native-apk-installer
            );
        }
    }

4. Simply import ApkInstaller from 'react-native-apk-installer' (You might also need to install react-native-fs package).

  import RNFS from 'react-native-fs';
  import ApkInstaller from 'react-native-apk-installer'

   try {
       var filePath = RNFS.CachesDirectoryPath + '/com.example.app.apk';
       var download = RNFS.downloadFile({
         fromUrl: 'http://example.com/com.example.app.apk',
         toFile: filePath,
         progress: res => {
             console.log((res.bytesWritten / res.contentLength).toFixed(2));
         },
         progressDivider: 1
       });

       download.promise.then(result => {
         if(result.statusCode == 200) {
           console.log(filePath);
           ApkInstaller.install(filePath);
         }
       });
   }
   catch(error) {
       console.warn(error);
   }