How to pass properties from native(Android) to React Native?

By Errong Leng - March 25, 2023

By Errong Leng – 25 Mar 2023 – View online →

You can pass properties down to the React Native app by providing a custom implementation of ReactActivityDelegate in your main activity. This implementation should override getLaunchOptions to return a Bundle with the desired properties.

The key part is a custom implementation of ReactActivityDelegate

I always like to show you code first before dive deep the implementation.

ReactRootView

The guide says how to set app properties via a react root view, but it didn't mention how you can get it.

mReactRootView.setAppProperties(updatedProps);

I fulfilled that part in my custom react activity delegate snippets:

ReactRootView::setAppProperties

ReactRootView provides a read-write property appProperties. After appProperties is set, the React Native app is re-rendered with new properties. The update is only performed when the new updated properties differ from the previous ones.

I used it in my custom LaunchAppAdManager.java and update the app properties in the Ads status callback.