linphone-android/res/layout/chat_imdn.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="match_parent"
  	android:background="@color/colorH" >

    <RelativeLayout
        android:id="@+id/top"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <LinearLayout
            android:id="@+id/top_bar"
            android:orientation="horizontal"
            android:background="@color/colorF"
            android:layout_width="match_parent"
            android:layout_height="60dp">

            <ImageView
                android:id="@+id/back"
                android:src="@drawable/back"
                android:background="@drawable/toolbar_button"
                android:contentDescription="@string/content_description_back"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="0.2"
                android:padding="18dp"/>

            <ImageView
                android:visibility="invisible"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="0.8"
                android:padding="15dp"/>
        </LinearLayout>

    </RelativeLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:gravity="center_horizontal"
        android:layout_below="@id/top">

        <include
            android:id="@+id/bubble"
            layout="@layout/chat_bubble"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="20dp"/>

        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical">

                <LinearLayout
                    android:id="@+id/read_layout_header"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:gravity="center"
                    android:background="@color/colorG">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        style="@style/font27"
                        android:text="@string/displayed"/>

                    <ImageView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:padding="5dp"
                        android:src="@drawable/message_read"/>

                </LinearLayout>

                <LinearLayout
                    android:id="@+id/read_layout"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"/>

                <LinearLayout
                    android:id="@+id/delivered_layout_header"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:gravity="center"
                    android:background="@color/colorG">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        style="@style/font28"
                        android:text="@string/delivered"/>

                    <ImageView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:padding="5dp"
                        android:src="@drawable/message_delivered"/>

                </LinearLayout>

                <LinearLayout
                    android:id="@+id/delivered_layout"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"/>

                <LinearLayout
                    android:id="@+id/undelivered_layout_header"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:gravity="center"
                    android:background="@color/colorG">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        style="@style/font29"
                        android:text="@string/undelivered"/>

                    <ImageView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:padding="5dp"
                        android:src="@drawable/message_undelivered"/>

                </LinearLayout>

                <LinearLayout
                    android:id="@+id/undelivered_layout"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"/>

            </LinearLayout>

        </ScrollView>

    </LinearLayout>

</RelativeLayout>