Delete app/src/main/res/layout/fragment_room_main.xml

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

-<?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/messageListRelativeLayout"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:background="@android:color/white">
-
-    <android.support.v7.widget.RecyclerView
-      android:id="@+id/messageRecyclerView"
-      android:layout_width="match_parent"
-      android:layout_height="match_parent"
-      android:scrollbars="vertical"
-      android:layout_above="@+id/messageComposer" />
-
-    <chat.rocket.android.widget.message.MessageFormLayout
-      android:id="@+id/messageComposer"
-      android:layout_width="match_parent"
-      android:layout_height="wrap_content"
-      android:layout_alignParentBottom="true"
-      android:theme="@style/Theme.AppCompat.Light" />
-</RelativeLayout>
\ No newline at end of file