开发原生部分，还是点击Open for Editing in Android Studio好用，提示、自动引用功能都能正常使用。

-----------android/app/src/main/kotlin/com/glodon/gzzjy_app/MainActivity.kt

import android.os.Bundle
import android.os.PersistableBundle
import android.util.Log
import androidx.annotation.NonNull;
import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugin.common.PluginRegistry
import io.flutter.plugins.GeneratedPluginRegistrantclass MainActivity: FlutterActivity() {override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {GeneratedPluginRegistrant.registerWith(flutterEngine)MethodChannel(flutterEngine.dartExecutor.binaryMessenger,"app.channel.shared.data").setMethodCallHandler(MethodChannel.MethodCallHandler { call, result ->run {if (call.method.contentEquals("getParam")) {result.success("message")Log.i("test","ms")}}})}}

注：这个flutterEngine.dartExecutor.binaryMessenger找了好久，各种文档上都是写的继承于io.flutter.app.FlutterActivity的MainActivity，直接getFlutterView()就行了，但是1.12这个版本的不行了。

------------------lib/main.dart

class _MyHomePageState extends State<MyHomePage> {static const platform = const MethodChannel('app.channel.shared.data');String dataShared = "No data";@overridevoid initState() {super.initState();getSharedText();}getSharedText() async {var sharedData = await platform.invokeMethod("getParam");if (sharedData != null) {setState(() {dataShared = sharedData;});print(dataShared);}}