安卓提示Cannot resolve symbol ‘BuildConfig‘

安卓提示Cannot resolve symbol 'BuildConfig'

build.gradle

android {
    ...
    defaultConfig {
        ...
        versionName "1.1.2" // 这里设置版本号
        ...
    }
    ...
}

java代码使用

tv_version.setText(BuildConfig.VERSION_NAME) ;
提示错误 Cannot resolve symbol 'BuildConfig

解决办法

build.gradle

android {
    ...
    buildFeatures {
        buildConfig = true
    }
   ...
}