Android端代码

package com.wk.flutterhybridandroid;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentTransaction;
import io.flutter.embedding.android.FlutterFragment;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.test).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
                //方法1
                //tx.replace(R.id.someContainer, FlutterFragment.createDefault());

                //方法2  给Flutter传参
                tx.replace(R.id.someContainer,
                        FlutterFragment
                                .withNewEngine()
                                .initialRoute("{name:'devio', dataList: ['aa']}")
                                .build());
                tx.commit();
            }
        });

        findViewById(R.id.test2).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FlutterAppActivity.start(MainActivity.this, "");
            }
        });
    }
}

Flutter端代码

import 'dart:async';
import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() => runApp(MyApp(initParams: window.defaultRouteName));

class MyApp extends StatelessWidget {
  final String? initParams;
  const MyApp({Key? key, this.initParams}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter 混合开发',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter 混合开发', initParams: this.initParams),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title, required this.initParams})
      : super(key: key);
  final String title;
  final String? initParams;
  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          // Codrizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'initParams: ${widget.initParams}',
              style: TextStyle(fontSize: 20),
            ),
            Text(
              ' ',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
    );
  }
}