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问题背景

升级 gradle plugin V2.2.3 --> gradle plugin V3.0.1后，运行报错：

* What went wrong:
A problem occurred configuring root project 'demoProject'.
> 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/build/gradle/3.0.1/gradle-3.0.1.pom
         https://jcenter.bintray.com/com/android/tools/build/gradle/3.0.1/gradle-3.0.1.jar
     Required by:
         project :

问题原因

新版本 gradle plugin 是需要配置 maven 仓库的

解决方案

在 /path/to/project/android/build.gradle 文件的 buildscript 和 allprojects --> repositories 节点分别新增配置 maven 仓库：

buildscript {
    repositories {
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }   
    }   
    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
    }   
}

allprojects {
    repositories {
        mavenLocal()
        jcenter()
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm 
            url "$rootDir/../node_modules/react-native/android"
        }   
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }   
    }   
}