Starting Dialog when Tab is clicked in Android TabHost

I've been researching in ways to start a dialog instead of a whole other activity when a tab is press开发者_StackOverflow中文版ed.

The functionality will be very similar to the "+" tab in the GroupMe App. http://images.brighthub.com/e3/4/e3491200866ea0263d781334943c6859ce13d029_large.jpg

An alternative solution would be to use a plain bar with no tabs.

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You can do that when you change the selected tab.

public class HelloTabWidget extends  TabActivity implements OnTabChangeListener{  
.....

mTabHost. setOnTabChangedListener(this);

@Override
    public void onTabChanged(String tabId) {

             // here you can show the Dialog
    }
}