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当与本机应用程序集成时,每个导航都会重新启动React-native应用程序

[英]React-native app is being restarted on every navigation when integrated with native app

我们正在尝试将新的React Native应用程序集成到现有的原生Android应用程序中。 遵循RN官方文档,我们设法使其工作,但有一些关于导航的问题。

我们有原生和非原生(JS)屏幕,我们需要一种在所有屏幕之间导航的好方法,无论屏幕是否为原生屏幕。

我们尝试采用本机导航react-native-navigation来查看是否有任何地址我们的问题,但没有一个实际工作。

目前,我们已经注册了所有我们的RN屏幕,如下所示:

const provide = (store, Screen) => {
      return props => (
        <Provider store={store}>
          <Screen {...props} />
        </Provider>
      );
    };

    const store = configureStore();

    AppRegistry.registerComponent('Home', () => provide(store, HomeComponent));

我们还创建了一个名为“Navigator”的本机模块,它具有名为openComponent导航方法,可接受屏幕名称及其道具。 以下是openComponent的实现方式:

// our native module code ...
     @ReactMethod
     public void openComponent(String name, String extra) {

         try {
             Intent intent = new Intent(this.getReactApplicationContext(), MyReactActivity.class);
             intent.putExtra("moduleName", name);
             intent.putExtra("extra", extra);

             getCurrentActivity().startActivityForResult(intent, 0);
         }
         catch (Exception e) {
             e.printStackTrace();
             Crashlytics.logException(e.getCause());
         }
     }

然后,每当我们想要在RN侧导航时,我们只需使用目标屏幕道具调用我们的自定义导航器。

当前方法的问题在于,每当我们导航到基于RN的屏幕时,RN部件正在重新启动,这导致Redux存储空。

这里我们的ReactActivity.java类的“onCreate”方法如何:

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Bundle initialProperties = new Bundle();
        initialProperties.putString("loginToken", HJSession.getSession().getSessionId());
        initialProperties.putString("username", HJSession.getSession().getUserName());
        initialProperties.putString("userId", HJSession.getSession().getUserId().toString());

        String moduleName = "topics";
        Bundle bundle = getIntent().getExtras();

        if (bundle != null) {
            moduleName = bundle.getString("moduleName");
            try {
                String extra = bundle.getString("extra");
                initialProperties.putString("extra", extra);
            }
            catch (Exception e) {
                e.printStackTrace();
                Crashlytics.logException(e.getCause());
            }
        }

        mReactRootView = new ReactRootView(this);
        mReactInstanceManager = ReactInstanceManager.builder()
                .setApplication(getApplication())
                .setJSMainModulePath("index")
                .addPackages(Arrays.<ReactPackage>asList(
                        new MainReactPackage(),
                        new RNFirebasePackage(),
                        new RNFirebaseMessagingPackage(),
                        new RNFirebaseNotificationsPackage(),
                        new RNI18nPackage(),
                        new VectorIconsPackage(),
                        new HJRNPackages(),
                        new NativeNavigationPackage()
                ))
                .setUseDeveloperSupport(BuildConfig.DEBUG)
                .setInitialLifecycleState(LifecycleState.RESUMED)
                .build();

        mReactRootView.startReactApplication(mReactInstanceManager, moduleName, initialProperties);

        setContentView(mReactRootView);
    }

实际上,对于你的问题案例,你应该在Gitlab或Github上上传一小部分你的项目并将其链接放在这里,因此我们可以提供更好的帮助。

事实上,我是一名JavaScriptReactReact Native开发人员,我无法帮助原住民,但绝对,我相信你和你的同事为你的应用选择了错误的方式。

React Native是一个不稳定的JavaScript项目,它具有不稳定的本机代码,这些代码正在及时更改,因此您应该只使用JavaScript编写所有功能。 就像Sophie Albert本文中所说的那样,他们想对React Native进行大的改动,所以,用JavaScript编写的所有代码都不是本机代码(Java,Objective C)。

起初,我相信你选择react-native-navigation是错误的。 你为什么不使用react-navigation

因为基于JavaScript 99.7%的react-navigation和Facebook团队改变原生方面,不会影响您的项目,开发和调试非常容易。 绝对,你可以使用像Redux这样的每个趋势库,因为你的项目基于JavaScript

我和我的同事正在为Sheypoor开发一个大规模的React Native应用程序,除了基于JavaScript所有应用程序的启动屏幕,在我们的输入测试中,我们甚至没有得到一次崩溃或错误或不需要的重启。

如果可以,请将导航回滚到完整的JavaScript导航库,例如我们选择的react-navigation 如果你上传了一个复制库,我可以比这种情况更好地帮助你。 但我放了一些代码结构来帮助你回滚到react-navigation

我们项目的index.js

import { AppRegistry } from 'react-native';
import App from './app/App';
import { name as appName } from './app.json';

AppRegistry.registerComponent(appName, () => App);

我们的应用程序的根文件, App.js文件:

import React from 'react';
import { Provider } from 'react-redux';
import RootNavigation from './RootNavigation';
import { onNavigationStateChange } from './utils/routes';
import configureStore from './redux/configureStore';

const store = configureStore();

const App = () => (
  <Provider store={store}>
    <RootNavigation onNavigationStateChange={onNavigationStateChange} />
  </Provider>
);

export default App;

RootNavigation.js文件,但它RootNavigation.js用于我们之前的提交。 由于其复杂性,我不会把更新的版本:

import { createSwitchNavigator } from 'react-navigation';
import { Loading, Dashboard, SignInStack, ListingManagement } from './screens';

const RootNavigation = createSwitchNavigator(
  {
    Loading,
    SignInStack,
    Dashboard,
    ListingManagement
  },
  {
    initialRouteName: 'SignInStack'
  }
);

export default RootNavigation;

最后, package.json的早期版本:

{
  "name": "sheypoor",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "android": "npx react-native run-android",
    "ios": "npx react-native run-ios",
    "physical-android": "react-native bundle --platform android --dev false --entry-file index.js --bundle-output android/app/src/main/assets/index.android.bundle --assets-dest android/app/src/main/res",
    "test": "jest",
    "eslint": "eslint .",
    "clean": "react-native-clean-project",
    "pre-commit": "lint-staged"
  },
  "lint-staged": {
    "*.js": [
      "eslint --fix ."
    ]
  },
  "dependencies": {
    "formik": "^1.3.0",
    "lint-staged": "^7.3.0",
    "prop-types": "^15.6.2",
    "react": "16.5.0",
    "react-native": "0.57.1",
    "react-native-confirmation-code-field": "^1.2.2",
    "react-native-vector-icons": "^5.0.0",
    "react-navigation": "^2.16.0",
    "react-redux": "^5.0.7",
    "redux": "^4.0.0",
    "yup": "^0.26.6"
  },
  "devDependencies": {
    "babel-eslint": "^9.0.0",
    "babel-jest": "23.6.0",
    "babel-plugin-module-resolver": "^3.1.1",
    "babel-plugin-root-import": "^6.1.0",
    "eslint": "^5.5.0",
    "eslint-config-airbnb": "^17.1.0",
    "eslint-config-prettier": "^3.0.1",
    "eslint-import-resolver-babel-plugin-root-import": "^1.1.1",
    "eslint-plugin-flowtype": "^2.50.0",
    "eslint-plugin-import": "^2.14.0",
    "eslint-plugin-jsx-a11y": "^6.1.1",
    "eslint-plugin-prettier": "^2.6.2",
    "eslint-plugin-react": "^7.11.1",
    "eslint-plugin-react-native": "^3.3.0",
    "eslint-plugin-sort-imports-es6-autofix": "^0.3.0",
    "flow-bin": "^0.78.0",
    "jest": "23.6.0",
    "metro-react-native-babel-preset": "0.45.6",
    "prettier": "^1.14.3",
    "react-native-clean-project": "^3.0.0",
    "react-native-config": "^0.11.5",
    "react-test-renderer": "16.5.0",
    "redux-devtools-extension": "^2.13.5"
  },
  "jest": {
    "preset": "react-native"
  },
  "rnpm": {
    "assets": [
      "./app/assets/fonts"
    ]
  }
}

使用这些代码和配置,我们甚至没有给出一个错误。

ReactActivity.java可以检查Bundle savedInstanceState

...为了控制React应用程序何时被实例化:

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    /* it's always NULL on first run */
    if (savedInstanceState == null) {

        Bundle initialProperties = new Bundle();
        initialProperties.putString("loginToken", HJSession.getSession().getSessionId());
        initialProperties.putString("username", HJSession.getSession().getUserName());
        initialProperties.putString("userId", HJSession.getSession().getUserId().toString());

        String moduleName = "topics";
        Bundle bundle = getIntent().getExtras();

        if (bundle != null) {
            moduleName = bundle.getString("moduleName");
            try {
                String extra = bundle.getString("extra");
                initialProperties.putString("extra", extra);
            } catch (Exception e) {
                Crashlytics.logException(e.getMessage());
                Log.e("ReactActivity", e.getMessage());
            }
        }

        mReactRootView = new ReactRootView(this);
        mReactInstanceManager = ReactInstanceManager.builder()
            .setApplication(getApplication())
            .setJSMainModulePath("index")
            .addPackages(Arrays.<ReactPackage>asList(
                new MainReactPackage(),
                new RNFirebasePackage(),
                new RNFirebaseMessagingPackage(),
                new RNFirebaseNotificationsPackage(),
                new RNI18nPackage(),
                new VectorIconsPackage(),
                new HJRNPackages(),
                new NativeNavigationPackage()
            ))
            .setUseDeveloperSupport(BuildConfig.DEBUG)
            .setInitialLifecycleState(LifecycleState.RESUMED)
            .build();

        mReactRootView.startReactApplication(mReactInstanceManager, moduleName, initialProperties);
        setContentView(mReactRootView);
    }
}

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