How can I get the active tab index in tab panel?

Question

How can I get the active or selected tab index in tab panel in sencha touch?

I am using tabpanel in my application.

Answer 1

var tabpanel = Ext.ComponentQuery.query('mainViewport #mainTabPanel'); //use your item Id / reference here
var activeTab = tabpanel.getActiveTab();
var activeTabIndex = tabpanel.items.indexOf(activeTab);

Answer 2

I had to use:

tabpanel.getActiveItem();

Was getting this error on getActiveTab:

getActiveTab is not a function

Answer 3

var activeTab = tabPanel.getActiveTab();
var currentStep = tabPanel.items.indexOf(activeTab);