IllegalStateException: Fragment already added in the tabhost fragment

This happens when we try to add same fragment or DialogFragment twice before dismissing,

just call

if(mFragment.isAdded())
{
     return; //or return false/true, based on where you are calling from
}

Having said that, I don’t see any reason why to remove old fragment and add the same fragment again since we can update the UI/data by simply passing parameters to the method inside the fragment