code: package ai.picovoice.reactnative.porcupinedemo;
  
  import android.app.Application;
  import android.content.Context;
  import com.facebook.react.PackageList;
  import com.facebook.react.ReactApplication;
  import com.facebook.react.ReactInstanceManager;
  import com.facebook.react.ReactNativeHost;
  import com.facebook.react.ReactPackage;
  import com.facebook.soloader.SoLoader;
  import java.lang.reflect.InvocationTargetException;
  import java.util.List;
  
  public class MainApplication extends Application implements ReactApplication {
  
    private final ReactNativeHost mReactNativeHost =
        new ReactNativeHost(this) {
          @Override
          public boolean getUseDeveloperSupport() {
            return BuildConfig.DEBUG;
          }
  
          @Override
          protected List<ReactPackage> getPackages() {
            @SuppressWarnings("UnnecessaryLocalVariable")
            List<ReactPackage> packages = new PackageList(this).getPackages();
            // Packages that cannot be autolinked yet can be added manually here, for example:
            // packages.add(new MyReactNativePackage());
            return packages;
          }
  
          @Override
          protected String getJSMainModuleName() {
            return "index";
          }
        };
  
    @Override
    public ReactNativeHost getReactNativeHost() {
      return mReactNativeHost;
    }
  
    @Override
    public void onCreate() {
      super.onCreate();
      SoLoader.init(this, /* native exopackage */ false);
      initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
    }
  
    /**
     * Loads Flipper in React Native templates. Call this in the onCreate method with something like
     * initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
     *
     * @param context
     * @param reactInstanceManager
     */
    private static void initializeFlipper(
        Context context, ReactInstanceManager reactInstanceManager) {
      if (BuildConfig.DEBUG) {
        try {
          /*
           We use reflection here to pick up the class that initializes Flipper,
          since Flipper library is not available in release mode
          */
          Class<?> aClass = Class.forName("ai.picovoice.reactnative.porcupinedemo.ReactNativeFlipper");
          aClass
              .getMethod("initializeFlipper", Context.class, ReactInstanceManager.class)
              .invoke(null, context, reactInstanceManager);
        } catch (ClassNotFoundException e) {
          e.printStackTrace();
        } catch (NoSuchMethodException e) {
          e.printStackTrace();
        } catch (IllegalAccessException e) {
          e.printStackTrace();
        } catch (InvocationTargetException e) {
          e.printStackTrace();
        }
      }
    }
  }
  