Switch between tabs in a fragment tabhost

Question

1. I have a FragmentTabHost, hosted in a Fragment. The tabHost has 4 tabs.
2. In first tab fragment, there are two nested fragments.
3. After clicking in a view in first nested fragment, a DialogFragment appears, which has a couple of buttons.

After clicking on a button in DialogFragment, I want to switch to tab number 3. How can I do this?

Answer 1

In Tab Fragment:

public void setCurrentTab(int tab_index){
    mTabHost = (FragmentTabHost)getActivity().findViewById(android.R.id.tabhost);
    mTabHost.setCurrentTab(tab_index);
    }

In click event of the button of DialogFragment:

FragmentTabHost tabHost = (FragmentTabHost)  getActivity().findViewById(android.R.id.tabhost);
tabHost.setCurrentTab(3);