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

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

    <!-- Loading wheel -->
    <ProgressBar
        android:id="@+id/fragment_conversation_progressbar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="10dp"/>

    <!-- No message notice -->
    <TextView
        android:id="@+id/fragment_conversation_noMsgYet"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/fragment_conversation_no_msg"
        android:textAlignment="center"
        android:layout_marginTop="10dp"/>

    <!-- Messages -->
    <ListView
        android:id="@+id/fragment_conversation_messageslist"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:divider="@null"
        android:stackFromBottom="true"
        android:transcriptMode="alwaysScroll"
        />

    <!-- Send messages form -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/conversation_footer_bg">

        <EditText
            android:id="@+id/fragment_conversation_newmessage_content"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:inputType="text"
            android:hint="@string/fragment_conversation_new_message_placeholder"/>

        <ImageButton
            android:id="@+id/fragment_conversation_newmessage_pickimage"
            android:layout_width="@dimen/fragment_conversation_buttons_width"
            android:layout_height="@dimen/fragment_conversation_buttons_height"
            android:src="@android:drawable/ic_menu_gallery"
            android:scaleType="fitCenter"
            android:contentDescription="@string/conversation_message_add_image"/>

        <ImageButton
            android:id="@+id/fragment_conversation_newmessage_send"
            android:layout_width="@dimen/fragment_conversation_buttons_width"
            android:layout_height="@dimen/fragment_conversation_buttons_height"
            android:src="@android:drawable/ic_menu_send"
            android:contentDescription="@string/conversation_message_send"/>

        <ProgressBar
            android:id="@+id/fragment_conversation_newmessage_loading"
            android:layout_width="@dimen/fragment_conversation_buttons_width"
            android:layout_height="@dimen/fragment_conversation_buttons_height" />

    </LinearLayout>

</LinearLayout>