Room (一) 基础

1. 使用 Room 数据库，添加引用库

dependencies {
    //https://developer.android.google.cn/jetpack/androidx/releases/room
    def room_version = "2.4.3"
    implementation "androidx.room:room-runtime:$room_version"
    annotationProcessor "androidx.room:room-compiler:$room_version"
}dependencies {
    /