Flutter 和 Android原生（Activity、Fragment）相互跳转、传参

在Flutter和Android原生之间实现互相跳转、传参，可以使用以下方法：

1. Flutter跳转到原生页面并传参：

   使用MethodChannel发送方法调用和参数。

2. 原生(Activity或Fragment)跳转到Flutter页面：

   使用FlutterView控件嵌入Flutter，并通过MethodChannel与Flutter通信。

以下是具体的实现方式：

Flutter跳转到原生页面并传参

在Flutter中：

import 'package:flutter/services.dart';
 
const platform = MethodChannel('com.example.myapp/navigation');
 
// 跳转方法，并传递参数
Future<void> goToNativePage(String data) async {
  try {
    await platform.invokeMethod('goToNativePage', {'data': data});
  } on PlatformException catch (e) {
    print("Failed to Invoke: '${e.message}'.");
  }
}

在Android原生代码中：

import io.flutter.embedding.android.FlutterActivity;
import io.flutter.embedding.engine.FlutterEngine;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
 
public class MainActivity extends FlutterActivity {
    @Override
    public void configureFlutterEngine(FlutterEngine flutterEngine) {
        super.configureFlutterEngine(flutterEngine);
        MethodChannel methodChannel = new MethodChannel(flutterEngine.getDartExecutor(), "com.example.myapp/navigation");
        methodChannel.setMethodCallHandler((methodCall, result) -> {
            if (methodCall.method.equals("goToNativePage")) {
                String data = methodCall.argument("data");
                // 跳转到原生页面并传递参数data
                Intent intent = new Intent(this, NativePageActivity.class);
                intent.putExtra("data", data);
                startActivity(intent);
            }
            result.success(true);
        });
    }
}

原生(Activity或Fragment)跳转到Flutter页面

在Android原生代码中：

import io.flutter.embedding.android.FlutterFragment;
 
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        // 假设FlutterFragment在activity_main.xml定义
        FlutterFragment flutterFragment = (FlutterFragment) getSupportFragmentManager().findFragmentByTag("flutter_fragment");
 
        if (flutterFragment == null) {