item_room_msg_welcome.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tool="http://schemas.android.com/tools"
    android:paddingTop="10dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

        <TextView
            android:id="@+id/tv_msg"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="12sp"
            android:maxWidth="240dp"
            android:background="@drawable/shape_round6dp_black80"
            android:paddingTop="8dp"
            android:paddingBottom="8dp"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:textColor="@color/text_7EF2C5"
            android:lineSpacingExtra="2dp"
            tool:text="1111111111111111111111111111111111111111111111111111111111111111111111111111" />

</RelativeLayout>