• 需要使用rn进行渲染的activity的覆写方式发生变化，以及需要声明一个Application类。

Activity类：

public class MainActivity extends ReactActivity {

    @Override
    protected String getMainComponentName() {
        return "RNStudyProject";
    }
}

Application类：

public class MainApplication extends Application implements ReactApplication {
    private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
        @Override
        protected boolean getUseDeveloperSupport() {
            return BuildConfig.DEBUG;
        }

        @Override
        protected List<ReactPackage> getPackages() {
            return Arrays.<ReactPackage>asList(
                    new MainReactPackage()
            );
        }
    };

    @Override
    public ReactNativeHost getReactNativeHost() {
        return mReactNativeHost;
    }
}

• java.lang.UnsatisfiedLinkError: could find DSO to load: libreactnativejni.so32 64

解决方法：

1、需要在gradle.properties文件中添加

android.useDeprecatedNdk=true

2、需要在build.gradle文件中添加

 defaultConfig {
        ...
        ndk {
            abiFilters "armeabi-v7a", "x86"
        }
    }
 ...
 packagingOptions {
        exclude "lib/arm64-v8a/librealm-jni.so"
 }
    

• index.android.js文件

import React,{ Component } from 'react';
import {
    AppRegistry,
    StyleSheet,
    Text,
    View
} from 'react-native';

class RNStudyProjectApp extends Component {

    render() {
        return (
            <View>
                <Text>Hello,World</Text>

            </View>
        );
    }
}

• 其他

在使用npm install之后生成的package.js文件中添加

{
  "name": "RNStudyProject",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  //修改
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start"
  },
  "author": "",
  "license": "ISC",
  //添加,这里的版本最好从facebook的默认的教程project中最新的一致吧
  "dependencies": {
    "react": "15.2.1",
    "react-native": "0.30.0"
  }
}