ComunicAndroid/app/src/main/res/layout/fragment_conversation_message_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:paddingBottom="5dp"
    android:paddingEnd="5dp"
    android:paddingStart="5dp"
    android:paddingTop="5dp">

    <!-- Messages on the left -->
    <LinearLayout
        android:id="@+id/fragment_conversation_message_left"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:id="@+id/fragment_conversation_message_item_username"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            tools:text="User name" />

        <RelativeLayout

            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="1dp">

            <ImageView
                android:id="@+id/fragment_conversation_message_item_accountimage"
                android:layout_width="26dp"
                android:layout_height="26dp"
                android:layout_gravity="center"
                android:layout_marginEnd="5dp"
                android:src="@drawable/default_account_image" />

            <TextView
                android:id="@+id/fragment_conversation_message_item_content"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:layout_toEndOf="@id/fragment_conversation_message_item_accountimage"
                android:background="@color/conversation_otheruser_messages_background"
                android:padding="5dp"
                android:paddingEnd="15dp"
                android:paddingStart="15dp"
                android:textColor="@color/conversation_otheruser_messages_textColor"
                tools:text="A message" />

        </RelativeLayout>

    </LinearLayout>

    <!-- Messages on the right -->
    <RelativeLayout
        android:id="@+id/fragment_conversation_message_right"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="1dp">

        <ImageView
            android:id="@+id/fragment_conversation_message_item_accountimage_right"
            android:layout_width="26dp"
            android:layout_height="26dp"
            android:layout_alignParentEnd="true"
            android:layout_gravity="end"
            android:layout_marginStart="5dp"
            android:src="@drawable/default_account_image" />

        <TextView
            android:id="@+id/fragment_conversation_message_item_content_right"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_toStartOf="@id/fragment_conversation_message_item_accountimage_right"
            android:background="@color/conversation_user_messages_background"
            android:padding="5dp"
            android:paddingEnd="15dp"
            android:paddingStart="15dp"
            android:textColor="@color/conversation_user_messages_textColor"
            tools:text="A message" />

    </RelativeLayout>

</LinearLayout>