Android - How to change bottom navigation bar text's font family

Question

I have created a bottom bar navigation in my android page. But now I want to apply the custom font-family in bottom navigation texts.

This is the bottom navigation c

Answer 1

public void setNavigationTypeface() {
        final Typeface avenirHeavy = Typeface.createFromAsset(this.getAssets(), "font2/Avenir-Heavy.ttf"); //replace it with your own font
        ViewGroup navigationGroup = (ViewGroup) bottomNavView.getChildAt(0);
        for (int i = 0; i < navigationGroup.getChildCount(); i++) {
            ViewGroup navUnit = (ViewGroup) navigationGroup.getChildAt(i);
            for (int j = 0; j < navUnit.getChildCount(); j++) {
                View navUnitChild = navUnit.getChildAt(j);
                if (navUnitChild instanceof BaselineLayout) {
                    BaselineLayout baselineLayout = (BaselineLayout) navUnitChild;
                    for (int k = 0; k < baselineLayout.getChildCount(); k++) {
                        View baselineChild = baselineLayout.getChildAt(k);
                        if (baselineChild instanceof TextView) {
                            TextView textView = (TextView) baselineChild;
                            textView.setTypeface(avenirHeavy);
                        }
                    }
                }
            }
        }
    }