Activity Indicator hiding problem

Hi guys, I am working whit alloy and I declare an activity indicator and a tableView, when call activity indicator.hide(),it disappear but the space where it was showed remain,how can I fix it?

<Alloy>
    <Collection src ="task"/>
        <Window title="List Task" id="window_task" onFocus="showIndicator" navBarHidden="false">    
            <ActivityIndicator id="activityIndicator" message="Loading..."/>
 
            <TableView id="table_task" dataCollection="task">
             </TableView>
 
        </Window>
</Alloy>

function showIndicator(e){
 
    $.table_task.setData([]);
    $.activityIndicator.show();
 
    console.log("loadData");
    task_list = Alloy.createCollection("task");
    task_list.fetch();  
    console.log("data fetched");
 
    setTimeout(function(){
        e.source.close();
        populateTable();
    $.activityIndicator.hide();
    }, 6000);
 
 
 
}