Room Persistence Library run time exception when calling Rooms inMemoryBuilder method

Question

When following the tutorial for setting up the Room persistence library I run in to this error when testing on an Android device.

java.lang.RuntimeException: cannot

Answer 1

Had the same issue with

• gradle 3.2.0-alpha09
• koltin 1.2.31

Due the removal of apply plugin: 'kotlin-kapt' and other buggy stuff.. I had to downgrade to kotlin 1.1.60 to make it work. Then use:

apply plugin: 'kotlin-kapt'

dependencies {
    ...
    implementation 'android.arch.persistence.room:runtime:1.0.0'
    kapt "android.arch.persistence.room:compiler:1.0.0"
}

an other option would be to write the DB entities/DAOs and DataBase in Java instead.