I will try my best to state my question and provide enough information to show the details. First insert the error logs ( FATAL EXCEPTION: AsyncTask #1 java.lang.RuntimeException: An error occured while executing doInBackground() ):
FATAL EXCEPTION: AsyncTask #1 java.lang.RuntimeException: An error occured while executing doInBackground() at android.os.AsyncTask$3.done(AsyncTask.java:299) at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352) at java.util.concurrent.FutureTask.setException(FutureTask.java:219) at java.util.concurrent.FutureTask.run(FutureTask.java:239) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) at java.lang.Thread.run(Thread.java:841) Caused by: java.lang.IllegalAccessError: tried to access method android.support.v4.net.ConnectivityManagerCompat.<init>:(Lcom/facebook/react/bridge/ReactApplicationContext;)V from class com.facebook.react.modules.netinfo.NetInfoModule 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:751) at com.facebook.react.ReactInstanceManagerImpl.createReactContext(ReactInstanceManagerImpl.java:688) at com.facebook.react.ReactInstanceManagerImpl.access$600(ReactInstanceManagerImpl.java:84) at com.facebook.react.ReactInstanceManagerImpl$ReactContextInitAsyncTask.doInBackground(ReactInstanceManagerImpl.java:177) at com.facebook.react.ReactInstanceManagerImpl$ReactContextInitAsyncTask.doInBackground(ReactInstanceManagerImpl.java:162) at android.os.AsyncTask$2.call(AsyncTask.java:287) at java.util.concurrent.FutureTask.run(FutureTask.java:234) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) at java.lang.Thread.run(Thread.java:841)
My project structure:
Android dependencies:
dependencies { ... compile 'com.facebook.react:react-native:0.20.0' }
AndroidManifest.xml:
<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme" > <activity android:name=".MainActivity" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="com.facebook.react.devsupport.DevSettingsActivity" /> </application> <uses-permission android:name="android.permission.INTERNET"/>
MainActivity.java:
public class MainActivity extends Activity implements DefaultHardwareBackBtnHandler { private ReactRootView mReactRootView; private ReactInstanceManager mReactInstanceManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mReactRootView = new ReactRootView(this); mReactInstanceManager = ReactInstanceManager.builder() .setApplication(getApplication()) .setBundleAssetName("index.android.bundle") .setJSMainModuleName("index.android") .addPackage(new MainReactPackage()) .setUseDeveloperSupport(BuildConfig.DEBUG) .setInitialLifecycleState(LifecycleState.RESUMED) .build(); mReactRootView.startReactApplication(mReactInstanceManager, "AndroidToRn03", null); setContentView(mReactRootView); } ... }
package.json:
{ "name": "androidtorn03", "version": "1.0.0", "description": "", "main": "index.android.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1", "start": "node node_modules/react-native/local-cli/cli.js start" }, "author": "", "license": "ISC", "dependencies": { "react-native": "^0.26.2" } }
then index.android.js:
import React from 'react'; import { AppRegistry, StyleSheet, Text, View } from 'react-native'; class AndroidToRn03 extends React.Component { render() { return ( <View style={styles.container}> <Text style={styles.hello}>React Native....</Text> </View> ) } } var styles = StyleSheet.create({ container: { flex: 1, justifyContent: 'center', }, hello: { fontSize: 20, textAlign: 'center', margin: 10, }, }); AppRegistry.registerComponent('AndroidToRn03', () => AndroidToRn03);
I tried many times according to the docs on the facebook website , but everything failed and the application started at the time of opening. I need your help! Could you spend some time to help me?