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當與本機應用程序集成時,每個導航都會重新啟動React-native應用程序

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

我們正在嘗試將新的React Native應用程序集成到現有的原生Android應用程序中。 遵循RN官方文檔,我們設法使其工作,但有一些關於導航的問題。

我們有原生和非原生(JS)屏幕,我們需要一種在所有屏幕之間導航的好方法,無論屏幕是否為原生屏幕。

我們嘗試采用本機導航react-native-navigation來查看是否有任何地址我們的問題,但沒有一個實際工作。

目前,我們已經注冊了所有我們的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));

我們還創建了一個名為“Navigator”的本機模塊,它具有名為openComponent導航方法,可接受屏幕名稱及其道具。 以下是openComponent的實現方式:

// 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,每當我們想要在RN側導航時,我們只需使用目標屏幕道具調用我們的自定義導航器。

當前方法的問題在於,每當我們導航到基於RN的屏幕時,RN部件正在重新啟動,這導致Redux存儲空。

這里我們的ReactActivity.java類的“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);
    }

實際上,對於你的問題案例,你應該在Gitlab或Github上上傳一小部分你的項目並將其鏈接放在這里,因此我們可以提供更好的幫助。

事實上,我是一名JavaScriptReactReact Native開發人員,我無法幫助原住民,但絕對,我相信你和你的同事為你的應用選擇了錯誤的方式。

React Native是一個不穩定的JavaScript項目,它具有不穩定的本機代碼,這些代碼正在及時更改,因此您應該只使用JavaScript編寫所有功能。 就像Sophie Albert本文中所說的那樣,他們想對React Native進行大的改動,所以,用JavaScript編寫的所有代碼都不是本機代碼(Java,Objective C)。

起初,我相信你選擇react-native-navigation是錯誤的。 你為什么不使用react-navigation

因為基於JavaScript 99.7%的react-navigation和Facebook團隊改變原生方面,不會影響您的項目,開發和調試非常容易。 絕對,你可以使用像Redux這樣的每個趨勢庫,因為你的項目基於JavaScript

我和我的同事正在為Sheypoor開發一個大規模的React Native應用程序,除了基於JavaScript所有應用程序的啟動屏幕,在我們的輸入測試中,我們甚至沒有得到一次崩潰或錯誤或不需要的重啟。

如果可以,請將導航回滾到完整的JavaScript導航庫,例如我們選擇的react-navigation 如果你上傳了一個復制庫,我可以比這種情況更好地幫助你。 但我放了一些代碼結構來幫助你回滾到react-navigation

我們項目的index.js

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

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

我們的應用程序的根文件, 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用於我們之前的提交。 由於其復雜性,我不會把更新的版本:

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"
    ]
  }
}

使用這些代碼和配置,我們甚至沒有給出一個錯誤。

ReactActivity.java可以檢查Bundle savedInstanceState

...為了控制React應用程序何時被實例化:

@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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