将单个React Native视图添加到现有Android应用程序的正确方法是什么？

Question

我正在开发一个现有的大型Android和iOs项目,我的团队希望采用本机反应.首先,我们希望在RN中实现一个功能,因为我们没有能力立即迁移整个项目.

我成功地添加了一个RN视图,既可以从本地节点服务器也可以从位于assets文件夹中的JS包文件中添加,但感觉有些笨拙.我知道iO支持这一点,但我在文档中找不到与现有Android项目集成的任何内容.以下是我提出的要点:

public class ReactNativeView extends FrameLayout {

    private static final String COMPONENT_NAME = "AwesomeProject";
    // Path of our RN module relative to project root
    private static final String MODULE_NAME = "react-sources/index.android"

    public ReactNativeView(Context Context) {
        super(context);
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();

        ReactInstanceManager.Builder builder = ReactInstanceManager.builder()
                .setApplication(AppDelegate.sharedApplication())
                .addPackage(new MainReactPackage())
                .setUseDeveloperSupport(BuildConfig.DEBUG)
                .setInitialLifecycleState(LifecycleState.BEFORE_RESUME);

        if (BuildConfig.USE_RN_LOCAL_SERVER) {
            // Set module name to be loaded from local node server
            builder.setJSMainModuleName(MODULE_NAME);
        } else {
            Uri uri = AssetsManager.getInstance().getJsBundleUri();
            // Load bundled jsBundle
            builder.setJSBundleFile(uri.getPath());
        }

        ReactInstanceManager reactInstanceManager = builder.build();
        MainActivity mainActivity = MainActivity.getMainActivity();

        setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        ReactRootView reactRootView =
            new ReactRootView(AppDelegate.sharedApplication().getTopActivity());
        // Is it really necessary to call 'startReactApplication' each time we want to render a react component?
        reactRootView.startReactApplication(reactInstanceManager, COMPONENT_NAME, null);

        addView(reactRootView);
        // After the view is added to the hierarchy we call the manager's 'onResume' function
        // to show the react view
        reactInstanceManager.onResume(mainActivity, mainActivity); // <-- What kind of sorcery is this?!
    }
}

我还在BuildConfig中添加了一个变量来确定要使用的JS包:

buildTypes {
    debug {
        buildConfigField "boolean", "USE_RN_LOCAL_SERVER", "true" // load from local server
    }
    release {
        minifyEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        buildConfigField "boolean", "USE_RN_LOCAL_SERVER", "false"
    }
}

这是一个完整的黑客.startReactApplication当我正在做的事情只是在屏幕上添加一个视图感觉很尴尬时调用.我错过了API或者这不是支持的方案吗？

Answer 1

所以显然打电话startReactApplication确实是正确的做法。如果有人对更完整、更有组织的解决方案感兴趣，您可以查看react-native-navigation。