Flutter Platform Channels - android上调用channel方法，挂起ui

import io.flutter.embedding.android.FlutterActivity;
import io.flutter.embedding.engine.FlutterEngine;
import io.flutter.plugin.common.MethodChannel;

public class MainActivity extends FlutterActivity {
    private static final String CHANNEL = "your_channel_name";

    @Override
    public void configureFlutterEngine(FlutterEngine flutterEngine) {
        super.configureFlutterEngine(flutterEngine);

        // 注册通道
        new MethodChannel(flutterEngine.getDartExecutor().getBinaryMessenger(), CHANNEL)
                .setMethodCallHandler((call, result) -> {
                    if (call.method.equals("your_method_name")) {
                        // 执行你的方法逻辑
                        String yourParameter = call.argument("your_parameter_name");
                        // ...
                        
                        result.success("your_success_result");
                    } else {
                        result.notImplemented();
                    }
                });
    }
}

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

class YourWidget extends StatelessWidget {
  static const platform = MethodChannel('your_channel_name');

  Future<String> callNativeMethod(String parameter) async {
    try {
      final String result = await platform.invokeMethod('your_method_name', {
        'your_parameter_name': parameter,
      });
      return result;
    } on PlatformException catch (e) {
      return "Error: ${e.message}";
    }
  }

  @override
  Widget build(BuildContext context) {
    return RaisedButton(
      onPressed: () async {
        String result = await callNativeMethod('your_parameter_value');
        // 处理返回结果
      },
      child: Text('Call Native Method'),
    );
  }
}