Flutter 页面嵌入 Android原生 View

在Flutter中嵌入Android原生View可以通过PlatformView实现。以下是一个简单的示例：

首先，在你的Flutter项目的android目录下的MainActivity.java文件中，你需要创建一个新的Android View。假设我们创建一个简单的TextView：

// MainActivity.java
import android.os.Bundle;
import android.widget.TextView;
import io.flutter.app.FlutterActivity;
import io.flutter.plugin.platform.PlatformViewFactory;
import io.flutter.plugins.flutter_plugin_android_lifecycle.FlutterAndroidLifecycle;
 
public class MainActivity extends FlutterActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        FlutterAndroidLifecycle.setApplicationLifecycle(this, getLifecycle());
        
        // 创建一个TextView作为原生View
        TextView textView = new TextView(this);
        textView.setText("Hello from Android");
        
        // 注册原生View到Flutter，这里的id是Flutter端用来识别这个View的唯一标识
        FlutterViewContainerFactory flutterViewContainerFactory = new FlutterViewContainerFactory(textView);
        this.registry.registerViewFactory("textView", flutterViewContainerFactory);
    }
}
 
class FlutterViewContainerFactory extends PlatformViewFactory {
    FlutterViewContainerFactory(TextView textView) {
        super(textView);
    }
 
    @Override
    public PlatformView create(Context context, int id, Object args) {
        // 创建并返回PlatformView
        TextView textView = new TextView(context);
        textView.setId(id);
        return new PlatformView(textView);
    }
}
 
class PlatformView implements io.flutter.plugin.platform.PlatformView {
    private final TextView textView;
 
    PlatformView(TextView textView) {
        this.textView = textView;
    }
 
    @Override
    public View getView() {
        return textView;
    }
 
    @Override
    public void dispose() {
        // 释放资源
    }
}

然后，在Flutter端，你可以使用AndroidView小部件来嵌入这个原生View：

// main.dart
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
 
void main() => runApp(MyApp());
 
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Plugin Example'),
        ),
        body: Center(
          child: AndroidView(
            viewType: 'textView', // 与Java代码中的id相对应
          ),
        ),
      ),
    );
  }
}

确保你的AndroidManifest.xml和MainActivity.java文件