搭建react native所遇到的坑

一、所遇问题

在搭建react native环境中,遇到执行react native  run-android命令出现如下问题

 Could not resolve all dependencies for configuration ':classpath'.
   > Could not resolve com.github.dcendents:android-maven-gradle-plugin:3.1.4
     Required by:
         project :
      > Could not resolve com.github.dcendents:android-maven-gradle-plugin:3.1.4
         > Could not get resource 'https://jcenter.bintray.com/com/github/dcendents/android-maven-gradle-plugin/1.3/android-maven-gradle-plugin-1.3.pom'.
            > Could not GET 'https://jcenter.bintray.com/com/github/dcendents/android-maven-gradle-plugin/1.3/android-maven-gradle-plugin-1.3.pom'.
               > Connect to 127.0.0.1:80 [/127.0.0.1] failed: Connection refused: connect

报错原因是：是因为gradle配置文件启动了代理，导致无法访问。把gradle.properties文件里代理的配置语句注释掉即可（即下面第二张图红框的内容）