运行时闪退，且调试flutter 代码，未进入main函数

build.gradle

setting.gradle

MainActivity

package com.example.flutterhybridandroid;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import io.flutter.embedding.android.FlutterActivity;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final EditText paramInput = findViewById(R.id.paramInput);
        findViewById(R.id.test).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String inputParams = paramInput.getText().toString().trim();
                FlutterAppActivity.start(MainActivity.this, inputParams);
                startActivity(
                    FlutterActivity
                        .withNewEngine()
                        .initialRoute("route1")
                        .build(MainActivity.this)
                );
            }
        });
    }
}

FlutterAppActivity

package com.example.flutterhybridandroid;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;

import androidx.annotation.NonNull;
import io.flutter.embedding.android.FlutterActivity;

public class FlutterAppActivity extends FlutterActivity{
    public final static String INIT_PARAMS = "initParams";
    private String initParams;

    public static void start(Context context, String initParams) {
        Intent intent = new Intent(context, FlutterAppActivity.class);
        intent.putExtra(INIT_PARAMS, initParams);
        context.startActivity(intent);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initParams = getIntent().getStringExtra(INIT_PARAMS);
    }

    /**
     * 重载该方法来传递初始化参数
     *
     * @return
     */

    @NonNull
    @Override
    public String getInitialRoute() {
        return initParams == null ? super.getInitialRoute() : initParams;
    }
}

flutter main.dart

import 'dart:ui';

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  final String initParams;

  const MyApp({Key? key, required this.initParams}) : super(key: key);

  // This widget is the root of your application.
  @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: initParams,
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, this.title = '', this.initParams = ''})
      : super(key: key);

  final String title;
  final String initParams;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    TextStyle textStyle = TextStyle(fontSize: 20);
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Container(
        alignment: Alignment.topLeft,
        decoration: BoxDecoration(color: Colors.lightBlueAccent),
        margin: EdgeInsets.only(top: 70),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          children: <Widget>[
            Text(
              '收到初始参数initParams:${widget.initParams}',
              style: textStyle,
            ),
          ],
        ),
      ),
    );
  }
}