Could not resolve all files for configuration ':classpath'. Could not find com.android.tools.build:gradle:3.0.1. Searched in the following locations: https://jcenter.bintray.com/com/android/tools/buil

解决方案：

在/android/app/build.gradle内编辑
新增mavenLocal() google()就能解决

buildscript {
    repositories {
//        新增mavenLocal() google()就能解决
        mavenLocal()
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}