(node:93136) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Could not find an installed version of Gradle either in Android Studio,
or on
in your path, or install Android Studio
(node:93136) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
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解决办法：
1）去Gradle官网：https://gradle.org/install
2）下载Gradle:https://gradle.org/releases，我这里下载的是最新的3.5版本(gradle-3.5-bin.zip)；
4）配置环境变量：系统变量--Path--编辑：
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