Room Requirements

To use Room, you need two dependencies in your module’s build.gradle file:

1. The runtime library version, using the standard implementation directive
2. An annotation processor, using the annotationProcessor directive

  implementation "android.arch.persistence.room:runtime:1.1.1"
  annotationProcessor "android.arch.persistence.room:compiler:1.1.1"

Note that Room has a minSdkVersion requirement of API Level 15 or higher. If you attempt to build with a lower minSdkVersion, you will get a build error. If you try to override Room’s minSdkVersion using manifest merger elements, while the project will build, expect Room to crash horribly.