Room cannot find implementation

kapt is for Kotlin.

First, add:

annotationProcessor "android.arch.persistence.room:compiler:1.0.0"

to your dependencies closure.

Then, upgrade android.arch.persistence.room:rxjava2 and android.arch.persistence.room:testing to 1.0.0 instead of 1.0.0-rc1.

ref: https://developer.android.com/jetpack/androidx/releases/room

for Kotlin change the 'annotationProcessor' keyword to 'kapt' in gradle file.

kapt "android.arch.persistence.room:compiler:1.1.1"

and also add on top of the dependency file

apply plugin: 'kotlin-kapt'

ref: https://developer.android.com/jetpack/androidx/releases/room

If You Use Kotlin sure exists this code in your in grade file.

apply plugin: "kotlin-kapt"

// Room
implementation "androidx.room:room-runtime:$room_version"
kapt "androidx.room:room-compiler:$room_version"

Documentation: https://developer.android.com/jetpack/androidx/releases/room

java.lang.RuntimeException: cannot find implementation for com.example.kermovie.data.repository.local.MoviesDatabase. MoviesDatabase_Impl does not exist

You have to add the following code to your build.gradle:

apply plugin: 'kotlin-kapt' 

dependencies {
    implementation 'androidx.room:room-runtime:2.3.0'
    implementation "androidx.room:room-ktx:2.3.0"
    kapt "androidx.room:room-compiler:2.3.0"
}

You may have to change the version when a newer version is available. You can check for a newer version on the following web mvnrepository.com