Using Glide To Download Images

add to gradle.build(Module:app)

implementation "com.android.support:recyclerview-v7:$android_support_version" 
implementation "com.github.bumptech.glide:glide:$glide_version"

add to gradle.build(Project:project)

ext.android_support_version = "26.0.0" 
ext.glide_version = "3.8.0"

add permission to mainfest

<uses-permission android:name="android.permission.INTERNET" />

ViewExt.kt

fun <T : View> RecyclerView.ViewHolder.bindView(viewId: Int)  
       = lazy { itemView.findViewById<T>(viewId) } 

fun ImageView.loadImage(photoUrl: String) { 
   Glide.with(context) 
           .load(photoUrl) 
           .into(this) 
}