RecyclerView: No adapter attached; skipping layout

[eliomaroun]

@antoniolg
I followed your book step by step till chapter 15, and I compiled it on my Nexus 5.
It is an empty screen still.

Here is my build.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
androidExtensions {
experimental = true
}

android {
compileSdkVersion 26
buildToolsVersion '26.0.2'

defaultConfig {
    applicationId "com.example.user.weatherkotlin"
    minSdkVersion 17
    targetSdkVersion 26
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

}

dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.google.code.gson:gson:2.8.5'
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'org.jetbrains.anko:anko:0.10.5'
implementation 'org.jetbrains.anko:anko-common:0.10.5'
implementation 'com.squareup.picasso:picasso:2.71828'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support:recyclerview-v7:26.1.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test🏃1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}