Changes to native view invocation since Flutter 1.12

1.12 before

• Deregister via PluginRegistry

Public static void registerWith(PluginRegistry registry) {// Prevent multiple registrations of final String key = TestFluttertoAndroidTextViewPlugin.class.getCanonicalName();if (registry.hasPlugin(key)) return;
		//初始化 PluginRegistry
		PluginRegistry.Registrar registrar = registry.registrarFor(key);
		//设置标识
		registrar.platformViewRegistry().registerViewFactory("com.flutter_to_native_test_textview", new TestViewFactory(registrar.messenger()));
	}
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• Then call the registration method in MainActivity’s onCteate method

TestFluttertoAndroidTextViewPlugin.registerWith(this)
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Version 1.12 and later

• Deregister through ShimPluginRegistry

class UnityViewRegistrant { fun registerWith(flutterEngine: FlutterEngine) { val key = UnityViewRegistrant::class.java!! .canonicalName val shimPluginRegistry = ShimPluginRegistry(flutterEngine)if (shimPluginRegistry.hasPlugin(key)) return
        val registrar = shimPluginRegistry.registrarFor(key)
        registrar.platformViewRegistry().registerViewFactory("unityView", UnityViewFactory(StandardMessageCodec()))
    }
}
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• The registration method is called in the configureFlutterEngine of MainActivity

override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
        GeneratedPluginRegistrant.registerWith(flutterEngine)
        UnityViewRegistrant().registerWith(flutterEngine)
    }
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