ionic3.0之后ionic cordova bulid/run报错 2018-01-19 app ionic ``` (node:4308) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejec tion id: 1): CordovaError: Could not find an installed version of Gradle either in Android Studio, or on your system to install the gradle wrapper. Please include gradle in your path, or install Android Studio (node:4308) [DEP0018] DeprecationWarning: Unhandled promise rejections are depre cated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code. [15:09:32] lint finished in 4.67 s ``` 报错的原因: cordova在6.4.0(cordova-android在6.1.2)之后,会要求安装Gradle,基于Gradle来编译、打包android。(具体版本号有待考证,但是需要安装Gradle属实) 解决办法: 1、手动下载gradle gradle-x.x-bin.zip (x.x代表版本) 根据需要下载某一版本 地址: (https://services.gradle.org/distributions) 我下载的是gradle-4.1 下载完成后,解压到任意文件夹下 2、添加环境变量 PATH=D:\gradle-4.1\bin 3、关闭cmd 4、打开cmd,输入gradle -v,查看是否安装成功 5、继续使用ionic cordova build android。