[Android][Room] Export schema

1. Room Gradle Plugin

If you are using Room version 2.6.0 and higher, you can use Room Gradle Plugin

Version catalog

[versions]
roomRuntime = "2.6.1"


[plugins]
androidx-room = { id = "androidx.room", version.ref = "roomRuntime" }

build.gradle.kts (root)

plugins {
    alias(libs.plugins.androidx.room) apply false
}

build.gradle.kts (module)

plugins {
    alias(libs.plugins.androidx.room)
}

room {
    schemaDirectory("$projectDir/schemas")
}

After running Build successfully, You can find the json file that contains schema under $projectDir/schemas directory

If you are using KSP, you can set export location by configuring KSP option

defaultConfig {
    ksp {
        arg("room.schemaLocation", "$projectDir/schemas")
    }
}