RN项目报错: Could not resolve all files for configuration ':classpath'.

RN项目报错: Could not resolve all files for configuration ‘:classpath’.

报错信息如下图:

解决办法:
在android目录下的build.gradle中给jcenter仓库指定url,具体用法如下

可直接复制下列代码:

buildscript {
    repositories {
        jcenter() {
            url "http://jcenter.bintray.com/"
        }
        google()
    }
    dependencies {

        classpath 'com.android.tools.build:gradle:3.0.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}