传送门中文网地址https://reactnative.cn/
首先按照官网一步步配置好环境地址再这里https://reactnative.cn/docs/getting-started.html
将android/build.gradle中的jcenter()和google()分别替换为maven { url 'https://maven.aliyun.com/repository/jcenter' }和maven { url 'https://maven.aliyun.com/repository/google' }（注意有多处需要替换）。
遇到一些小坑： 坑1：:app:debugCompileClassPath报错 总感觉少了什么：于是照片查阅的资料在build.gradle中能加的都加上了就好了
// Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { ext { buildToolsVersion = "28.0.3" minSdkVersion = 16 compileSdkVersion = 28 targetSdkVersion = 28 } repositories { google() jcenter() maven { url 'https://maven.aliyun.com/repository/google' } maven { url 'https://maven.aliyun.com/repository/jcenter' } } dependencies { classpath("com.android.tools.build:gradle:3.5.2") classpath 'com.google.gms:google-services:4.0.1' //这行对谷歌服务库进行依赖 // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } allprojects { repositories { mavenLocal() maven { // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm url("$rootDir/../node_modules/react-native/android") } maven { // Android JSC is installed from npm url("$rootDir/../node_modules/jsc-android/dist") } google() jcenter() maven { url 'https://maven.aliyun.com/repository/google' } maven { url 'https://maven.aliyun.com/repository/jcenter' } maven { url 'https://www.jitpack.io' } maven {url 'https://dl.bintray.com/jetbrains/anko'} maven {url "https://maven.google.com"} } } task clean(type: Delete) { delete rootProject.buildDir }坑2：:app:processDebugResources启动模拟器关掉正在运行的as中的项目就行。avd还是要开着的状态才行。
坑3：unable to load script,make sure you are either running a Metro server。。。 我关掉了模拟器，重新yarn react-native start 执行了一次 重新yarn android就好了。 最后就就成功了！！！
