I want to achieve something like this :

I want to make the button transparent Which I have successfully done, now tell me how can I show the line on the upper border of the button and between the two button. How can I handle this. my xml of button is simply goes like this
<LinearLayout
        android:id="@+id/buttons"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:gravity="center"
        android:layout_alignParentBottom="true"
        android:weightSum="2">
            <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text=" Send Message"
            android:layout_weight="1"
            android:background="@android:color/transparent"
            android:textColor="#ff4444"/>
        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="Cancel"
            android:layout_weight="1"
            android:background="@android:color/transparent"
            android:textColor="#ff4444"/>
    </LinearLayout>
So How can I achieve the borders like this as shown in picture below. pardon me , for the small size picture as I have this only single image to clear my question .
 
     
    