Add an equals method to Contact.
A contact is equals to an other if they got the same bare Jid.
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/login_menu_login"
android:visible="true"
android:title="@string/login_menu_login"
android:icon="@drawable/ic_menu_login" />
<item android:id="@+id/login_menu_settings"
android:visible="true"
android:title="@string/login_menu_settings"
android:icon="@android:drawable/ic_menu_manage" />
<item android:id="@+id/login_menu_about"
android:visible="true"
android:title="@string/login_menu_about"
android:icon="@android:drawable/ic_menu_help" />
</menu>