将 react-native 集成到现有的 Android 应用程序中

Question

我们正在尝试将 react-native 集成到我们现有的 android 应用程序中：我们 build.gradle 的 SDK 要求是： minSdkVersion 16 targetSdkVersion 23

我们使用一个 Intent 来调用初始 React index.js：

Intent inte = new Intent(this, ReactNativeStarter.class);
startActivity(inte);

其余代码来自反应集成教程。

当我们尝试调用我们的 react 组件时，我们会收到以下错误：

Caused by: java.lang.IllegalAccessError: Method 'void android.support.v4.net.ConnectivityManagerCompat.<init>()' is inaccessible to class 'com.facebook.react.modules.netinfo.NetInfoModule' 
     (declaration of 'com.facebook.react.modules.netinfo.NetInfoModule' appears in /data/data/at.??????/files/instant-run/dex/slice-com.facebook.react-react-native-0.20.1_3762d580ab3ced1fa2f7503493d38e666994b9fa-classes.dex)
        at com.facebook.react.modules.netinfo.NetInfoModule.<init>(NetInfoModule.java:55)

你能帮我吗？

完整的错误日志：

12-19 10:07:22.157 30271-32680/at.???? E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #4
    Process: at.?????, PID:
    java.lang.RuntimeException: An error occured while executing doInBackground()
        at android.os.AsyncTask$3.done(AsyncTask.java:300)
        at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
        at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
        at java.util.concurrent.FutureTask.run(FutureTask.java:242)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
        at java.lang.Thread.run(Thread.java:818)
     Caused by: java.lang.IllegalAccessError: Method 'void android.support.v4.net.ConnectivityManagerCompat.<init>()' is inaccessible to class 'com.facebook.react.modules.netinfo.NetInfoModule' 
     (declaration of 'com.facebook.react.modules.netinfo.NetInfoModule' appears in /data/data/at.??????/files/instant-run/dex/slice-com.facebook.react-react-native-0.20.1_3762d580ab3ced1fa2f7503493d38e666994b9fa-classes.dex)
        at com.facebook.react.modules.netinfo.NetInfoModule.<init>(NetInfoModule.java:55)
        at com.facebook.react.shell.MainReactPackage.createNativeModules(MainReactPackage.java:67)
        at com.facebook.react.ReactInstanceManagerImpl.processPackage(ReactInstanceManagerImpl.java:793)
        at com.facebook.react.ReactInstanceManagerImpl.createReactContext(ReactInstanceManagerImpl.java:730)
        at com.facebook.react.ReactInstanceManagerImpl.access$600(ReactInstanceManagerImpl.java:91)
        at com.facebook.react.ReactInstanceManagerImpl$ReactContextInitAsyncTask.doInBackground(ReactInstanceManagerImpl.java:184)
        at com.facebook.react.ReactInstanceManagerImpl$ReactContextInitAsyncTask.doInBackground(ReactInstanceManagerImpl.java:169)
        at android.os.AsyncTask$2.call(AsyncTask.java:288)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
        at java.lang.Thread.run(Thread.java:818) 

Answer 1

我怀疑这是由于 gradle 选择了错误版本的 react-native 造成的，因为 maven allprojects 配置中的路径错误（至少对我们来说是这样），请参见此处的 PR： https : //github.com/facebook/react-native /拉/14743

Answer 2

我正在将现有的 Android 应用程序（用 kotlin 编写）与 React Native 集成。

我为运行ReactRootView而编写的活动 (.kt) 具有以下onCreate()方法：

 override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        mReactRootView = ReactRootView(this)
        mReactInstanceManager = ReactInstanceManager.builder()
                .setApplication(application)
                .setBundleAssetName("index.android.bundle")
                .setJSMainModuleName("index")
                .addPackage(MainReactPackage())
                .setUseDeveloperSupport(BuildConfig.DEBUG)
                .setInitialLifecycleState((LifecycleState.RESUMED))
                .build()

        // The string here (e.g. "MyReactNativeApp") has to match
        // the string in AppRegistry.registerComponent() in index.js
        mReactRootView!!.startReactApplication(mReactInstanceManager, "MyReactNativeApp", null)
        setContentView(mReactRootView)

        if (Build.VERSION.SDK_INT >= M) {
            if (!canDrawOverlays(this)) {
                val intent = Intent(ACTION_MANAGE_OVERLAY_PERMISSION,
                        Uri.parse("package:$packageName"))
                startActivityForResult(intent, OVERLAY_PERMISSION_REQ_CODE)
            }
        }
    }

问题刚好上线

mReactRootView!!.startReactApplication(mReactInstanceManager, "MyReactNativeApp", null) 。

我不得不将“模块”名称从“MyReactNativeApp”更改为“App”，这是我在 React 上注册的主要组件的名称。

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

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

Sooo...正确的onCreate()函数是

 override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        mReactRootView = ReactRootView(this)
        mReactInstanceManager = ReactInstanceManager.builder()
                .setApplication(application)
                .setBundleAssetName("index.android.bundle")
                .setJSMainModuleName("index")
                .addPackage(MainReactPackage())
                .setUseDeveloperSupport(BuildConfig.DEBUG)
                .setInitialLifecycleState((LifecycleState.RESUMED))
                .build()

        // The string here (e.g. "MyReactNativeApp") has to match
        // the string in AppRegistry.registerComponent() in index.js
        mReactRootView!!.startReactApplication(mReactInstanceManager, "App", null)
        setContentView(mReactRootView)

        if (Build.VERSION.SDK_INT >= M) {
            if (!canDrawOverlays(this)) {
                val intent = Intent(ACTION_MANAGE_OVERLAY_PERMISSION,
                        Uri.parse("package:$packageName"))
                startActivityForResult(intent, OVERLAY_PERMISSION_REQ_CODE)
            }
        }
    }