Android kotlin中 Room 的坑 修复如下
kotlin
加上这句
apply plugin: 'kotlin-kapt'
//Room
def room_version = "2.2.0-rc01"
implementation "android.arch.persistence.room:runtime:$room_version"
kapt "android.arch.persistence.room:compiler:$room_version"
implementation "android.arch.persistence.room:rxjava2:$room_version"
implementation "android.arch.persistence.room:guava:$room_version"