Update item_room_member.xml

app/src/main/res/layout/item_room_member.xml

 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_margin="@dimen/margin_16"
-    android:orientation="vertical">
+    android:padding="@dimen/margin_16">
+
+    <chat.rocket.android.widget.RocketChatAvatar
+        android:id="@+id/userAvatar"
+        android:layout_width="40dp"
+        android:layout_height="40dp" />
 
     <TextView
-        android:id="@+id/text_member_name"
-        android:layout_width="match_parent"
+        android:id="@+id/username"
+        android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:gravity="center"
-        android:maxLines="1"
-        android:ellipsize="end" />
-</LinearLayout>
\ No newline at end of file
+        android:layout_marginLeft="@dimen/margin_16"
+        android:layout_marginStart="@dimen/margin_16"
+        android:textAppearance="@style/TextAppearance.RocketChat.Message.Username"
+        app:layout_constraintTop_toTopOf="@+id/userAvatar"
+        app:layout_constraintLeft_toRightOf="@+id/userAvatar"
+        app:layout_constraintBottom_toBottomOf="@+id/userAvatar"
+        tools:text="\@john.doe" />
+
+    <View
+        android:layout_width="0dp"
+        android:layout_height="1dp"
+        android:layout_weight="1"
+        android:background="@color/colorDivider"
+        android:layout_marginTop="@dimen/margin_8"
+        app:layout_constraintTop_toBottomOf="@+id/userAvatar" />
+</android.support.constraint.ConstraintLayout>
\ No newline at end of file