Add an equals method to Contact.
A contact is equals to an other if they got the same bare Jid.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:padding="8dp">
<ListView android:id="@id/android:list" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:layout_weight="1"
android:drawSelectorOnTop="false" />
<TextView android:id="@id/android:empty" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:text="@string/privacy_list_no_data" />
</LinearLayout>