Pass parameters to flutter module from android or iOS

Question

I'm experimenting with integrating a flutter module in an existing android app. Starting a view works fine using this code:

private fun startFlutterActivity() {
    val intent = FlutterActivity.withCachedEngine("default_engine").build(this)
    startActivity(intent)
}

But I'm not sure on how to pass additional data e.g. an id to fetch data for to the flutter component. I know you can establish a message channel but this seems like a lot of overhead for passing stuff around.

Answer 1

The easiest way is to pass the id through to the flutter engine via the initial route.

So like:

    flutterEngine = new FlutterEngine(this);
    // Configure an initial route.
    flutterEngine.getNavigationChannel().setInitialRoute("showStuf?id=$id");

Or, in your example, you can simply add the intent extra FlutterActivityLaunchConfigs.EXTRA_INITIAL_ROUTE to the intent.

On the flutter side you would then simply parse the initial route in your onGenerateRoute handler for your MaterialApp or other navigator config.