小编Dan*_*kov的帖子

我已将 kotlin 插件更新到 1.5.20 并发生了此问题。如果我返回 1.5.10 一切正常。

Schema export directory is not provided to the annotation processor so we cannot import the schema. To generate auto migrations, you must provide `room.schemaLocation` annotation processor argument AND set exportSchema to true.
public abstract class BatteryInfoDatabase extends androidx.room.RoomDatabase {

我正在使用最新版本的 Room 持久性库 alpha 3，因为它提供自动迁移

def room_version = "2.4.0-alpha03"
    implementation("androidx.room:room-ktx:$room_version")
    kapt("androidx.room:room-compiler:$room_version")

        javaCompileOptions {
            annotationProcessorOptions {
                arguments += [
                        "room.schemaLocation":"$projectDir/schemas".toString()]
            }
        }