android View 提供给flutter用_android 封装view传递参数给flutter-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_32683045/article/details/106055521

本文详细介绍了如何将Android的TextView集成到Flutter应用中，包括创建提供出去的View、实现PlatformViewFactory、注册View以及在Activity和Flutter中的调用步骤，最终实现在Flutter中显示TextView的功能。

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用Android的textview为例

一、创建提供出去的View

public class SDKView implements PlatformView {
    private TextView textView;
    public SDKView(Context context,String text) {
        textView = new TextView(context);
        textView.setText(text);
    }
    @Override
    public View getView() {
        return textView;
    }
    @Override
    public void dispose() {
    }
}

二、创建 PlatformViewFactory、其实类似RN的ViewManager

public class SDKViewFactory extends PlatformViewFactory {
    private static final String TAG = "PlatformViewFactory";

    public SDKViewFactory(MessageCodec<Object> createArgsCodec) {
        super(createArgsCodec);
    }
    @Override
    public PlatformView create(Context context, int i, Object o) {
        Map<String,Object> param = (Map<String,Object>)o;
        String text = (String)param.get("text");
        Log.d(TAG, "create: "+text);
        return new SDKView(context,text);

    }
}

三、View注册方法。个人理解类似RNPackage。

public class SDKViewRegistrant {

    public static void registerWith(PluginRegistry registry) {
        final String key = "NLayout";
        if (registry.hasPlugin(key)) return;
        PluginRegistry.Registrar registrar = registry.registrarFor(key);
        registrar.platformViewRegistry().registerViewFactory("widget.name", new SDKViewFactory(new StandardMessageCodec()));
    }

}

四、在Activity初始化

public class MainActivity extends FlutterActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        FlutterMain.startInitialization(this);
        super.onCreate(savedInstanceState);

        SDKViewRegistrant.registerWith(this);


    }

}

五、在Flutter 中调用

 AndroidView(
          viewType: 'widget.name',
          creationParams: {'text': 'Flutter传给AndroidTextView 的参数'},
          creationParamsCodec: StandardMessageCodec(),
        )

自此 TextView已经成功在Flutter中显示。