How to customize android title bar in fragments onCreateView

I am trying to change the view of titlebar by typica开发者_JS百科l approach:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup group, Bundle args) {
    ...
    Window window = getActivity().getWindow();
    window.requestFeature(Window.FEATURE_CUSTOM_TITLE);
    window.setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.brand_update_layout);
    ProgressBar progressBar = (ProgressBar) inflater.inflate(R.layout.brand_update_layout, group, false)
            .findViewById(R.id.title_progress);
    TextView title_Text = (TextView) inflater.inflate(R.layout.brand_update_layout, group, false)
            .findViewById(R.id.title_text);
    title_Text.setText(Html.fromHtml("..."));
    progressBar.setVisibility(View.VISIBLE);
    ...
}

But this code does not work on some reason. Whats wrong?

UPD. ok, I declared

    Window window = getWindow();
    window.requestFeature(Window.FEATURE_CUSTOM_TITLE);
    window.setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.brand_update_layout); 

in Activity and

    ProgressBar progressBar = (ProgressBar)getActivity().getWindow().findViewById(R.id.title_progress);
    TextView title_Text = (TextView)getActivity().getWindow().findViewById(R.id.title_text);
    title_Text.setText(...);
    progressBar.setVisibility(View.VISIBLE);

in fragment, however I have an error:

    ERROR/AndroidRuntime(12213): java.lang.NullPointerException
    at com.quto.ru.CarListFragment.onCreateView(CarListFragment.java:188)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:837)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1041)
    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:616)
    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1359)

on string title_Text.setText(...);

You are inflating a whole new view and trying to find the progressbar / textview in that newly inflated view by using this code:

ProgressBar progressBar = (ProgressBar) inflater.inflate(R.layout.brand_update_layout, group, false).findViewById(R.id.title_progress);
TextView title_Text = (TextView) inflater.inflate(R.layout.brand_update_layout, group, false).findViewById(R.id.title_text);

Try changing it to this

ProgressBar progressBar = (ProgressBar)window.findViewById(R.id.title_progress);
TextView title_Text = (TextView)window.findViewById(R.id.title_text);