Add item_room_file.xml

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

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_margin="@dimen/margin_16"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/text_file_name"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:maxLines="1"
+        android:ellipsize="end" />
+</LinearLayout>
\ No newline at end of file