Update RoomMemberListAdapter.kt

app/src/main/java/chat/rocket/android/layouthelper/chatroom/list/RoomMemberListAdapter.kt

 package chat.rocket.android.layouthelper.chatroom.list
 
+import android.content.Context
 import android.support.v7.widget.RecyclerView
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.TextView
 import chat.rocket.android.R
+import chat.rocket.android.widget.RocketChatAvatar
+import chat.rocket.android.widget.helper.UserAvatarHelper
 import chat.rocket.core.models.User
 import kotlinx.android.synthetic.main.item_room_member.view.*
 
-class RoomMemberListAdapter(private val dataSet: List<User>) : RecyclerView.Adapter<RoomMemberListAdapter.ViewHolder>() {
+class RoomMemberListAdapter(private val dataSet: List<User>, private val hostname: String, private val context: Context) : RecyclerView.Adapter<RoomMemberListAdapter.ViewHolder>() {
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
         val view = LayoutInflater.from(parent.context).inflate(R.layout.item_room_member, parent, false)
@@ -18,12 +21,22 @@ class RoomMemberListAdapter(private val dataSet: List<User>) : RecyclerView.Adap
 
     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
         val user = dataSet[position]
-        holder.memberNameText.text = user.username
+
+        val username = user.username
+        if (username != null) {
+            holder.username.text = context.getString(R.string.username, username)
+            val placeholderDrawable = UserAvatarHelper.getTextDrawable(username, holder.userAvatar.context)
+            holder.userAvatar.loadImage(UserAvatarHelper.getUri(hostname, username), placeholderDrawable)
+        } else {
+            holder.userAvatar.visibility = View.GONE
+            holder.username.visibility = View.GONE
+        }
     }
 
     override fun getItemCount(): Int = dataSet.size
 
     class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
-        val memberNameText : TextView = itemView.text_member_name
+        val userAvatar: RocketChatAvatar = itemView.userAvatar
+        val username: TextView = itemView.username
     }
 }
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