linphone-android/app/src/main/res/layout/chat_bubble.xml

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

    <View
        android:id="@+id/rightAnchor"
        android:layout_width="3dp"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"/>

    <CheckBox
        android:id="@+id/delete_event"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:adjustViewBounds="true"
        android:button="@drawable/checkbox"
        android:clickable="false"
        android:contentDescription="@string/content_description_delete" />

    <LinearLayout
        android:id="@+id/event"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="5dp"
        android:layout_marginBottom="5dp"
        android:layout_toLeftOf="@id/delete_event"
        android:background="@drawable/event_decoration_gray"
        android:gravity="center"
        android:orientation="horizontal"
        android:visibility="gone">

        <TextView
            android:id="@+id/event_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="?attr/backgroundColor"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:textAppearance="@style/group_chat_event_font" />

    </LinearLayout>

    <LinearLayout
        android:id="@+id/security_event"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="5dp"
        android:layout_marginBottom="5dp"
        android:layout_toLeftOf="@id/delete_event"
        android:background="@drawable/event_decoration_red"
        android:gravity="center"
        android:orientation="horizontal"
        android:visibility="gone">

        <TextView
            android:id="@+id/security_event_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="?attr/backgroundColor"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:textAppearance="@style/group_chat_security_event_font" />

    </LinearLayout>

    <RelativeLayout
        android:id="@+id/bubble"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toLeftOf="@id/rightAnchor">

        <LinearLayout
            android:id="@+id/background"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/time"
            android:layout_marginLeft="45dp"
            android:layout_marginTop="1dp"
            android:layout_marginRight="3dp"
            android:layout_marginBottom="1dp"
            android:layout_toLeftOf="@+id/imdn"
            android:background="@drawable/chat_bubble_outgoing_full"
            android:orientation="vertical"
            android:paddingTop="5dp"
            android:paddingBottom="5dp">

            <com.google.android.flexbox.FlexboxLayout
                xmlns:app="http://schemas.android.com/apk/res-auto"
                android:id="@+id/multi_content"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="5dp"
                app:flexWrap="wrap" />

            <RelativeLayout
                android:id="@+id/single_content"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="5dp">

                <include layout="@layout/chat_bubble_content" />

            </RelativeLayout>

            <org.linphone.views.MultiLineWrapContentWidthTextView
                android:id="@+id/message"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:layout_marginTop="5dp"
                android:layout_marginRight="10dp"
                android:layout_marginBottom="5dp"
                android:textAppearance="@style/chat_bubble_message_font" />

        </LinearLayout>

        <ProgressBar
            android:id="@+id/download_in_progress"
            android:visibility="gone"
            android:layout_width="10dp"
            android:layout_height="10dp"
            android:layout_toRightOf="@id/background"
            android:layout_alignBottom="@id/background"
            android:indeterminateTint="?attr/accentColor" />

        <RelativeLayout
            android:id="@+id/message_sender_avatar"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignTop="@id/background"
            android:layout_marginLeft="5dp">

            <include layout="@layout/contact_avatar" />

        </RelativeLayout>

        <TextView
            android:id="@id/time"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="45dp"
            android:layout_marginTop="7dp"
            android:layout_marginRight="5dp"
            android:layout_toLeftOf="@id/imdn"
            android:gravity="right"
            android:textAppearance="@style/chat_bubble_time_font" />

        <ImageView
            android:id="@id/imdn"
            android:layout_width="10dp"
            android:layout_height="10dp"
            android:layout_alignLeft="@id/delete_message"
            android:layout_alignBottom="@id/background"
            android:layout_alignParentRight="true"
            android:layout_marginRight="5dp"
            android:src="@drawable/imdn_received" />

        <ProgressBar
            android:id="@+id/send_in_progress"
            android:layout_width="10dp"
            android:layout_height="10dp"
            android:layout_alignBottom="@id/background"
            android:layout_alignParentRight="true"
            android:layout_marginLeft="5dp"
            android:layout_marginRight="5dp"
            android:indeterminateTint="?attr/accentColor" />

    </RelativeLayout>

</RelativeLayout>