How To Fix Your Android Build In Flutter 3.29.0

So, Flutter team removed the old one approach for plugin registration and totally removed FlutterApplication class.

So, if you had something like:

internal class SomeApplication : FlutterApplication(), PluginRegistry.PluginRegistrantCallback

Now you just need to make it looks like

internal class SomeApplication : android.app.Application()

That’s it. Also, in your plugins, the old one thing with

public static void registerWith(Registrar registrar) {
    MethodChannel channel = new MethodChannel(registrar.messenger(), "instagram_share_plus");
    final ShareInstagramVideoPlugin instance = new ShareInstagramVideoPlugin();
    channel.setMethodCallHandler(instance);
}

Should be gone, as it will not build if it is presents.

https://github.com/milan-ciganovic/instagram_share_plus/pull/8/files