Android studio 报错 

All flavors must now belong to a named flavor dimension. Learn more at https://d.android.com/r/tools/flavorDimensions-missing-error-message.html

在app的gradle中 的 android下添加   

flavorDimensions "versionCode"

compileSdkVersion 28    defaultConfig {        applicationId "com.lanyu96.loadinglayout"        minSdkVersion 23        targetSdkVersion 28        versionCode 1        versionName "1.0"        //解决报错 All flavors must now belong to a named .....        flavorDimensions "versionCode"        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"