| Cannot get property 'supportLibVersion' on extra properties extension as it does not existOpen File |
感谢楼上同学帮我解答问题
用最新的AS试一试，老师的版本是3.6.2，直接打开没问题
要自己在根目录下的build.gradle文件里面手动添加一下
ext {
buildToolsVersion = "28.0.3"
...
targetSdkVersion = 28
supportLibVersion="24.2.0"
}