Android - Calligraphy and TabLayout

FontAwareTabLayout.java

/**
 * Simple helper class which extends a TabLayout to allow us to customize the font of the tab.
 * https://gist.github.com/tmtrademarked/09926077a406959be15fc8a824a52751
 * https://github.com/chrisjenx/Calligraphy/issues/180
 */
public final class FontAwareTabLayout extends TabLayout {

  private String fontPath;

  public FontAwareTabLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
    fontPath = pullFontPathFromView(context, attrs, new int[] { R.attr.fontPath });
  }

  /**
   * Tries to pull the Custom Attribute directly from the TextView.
   *
   * @param context Activity Context
   * @param attrs View Attributes
   * @param attributeId if -1 returns null.
   * @return null if attribute is not defined or added to View
   */
  static String pullFontPathFromView(Context context, AttributeSet attrs, int[] attributeId) {
    if (attributeId == null || attrs == null) return null;

    final String attributeName;
    try {
      attributeName = context.getResources().getResourceEntryName(attributeId[0]);
    } catch (Resources.NotFoundException e) {
      // invalid attribute ID
      return null;
    }

    final int stringResourceId = attrs.getAttributeResourceValue(null, attributeName, -1);
    return stringResourceId > 0 ? context.getString(stringResourceId)
        : attrs.getAttributeValue(null, attributeName);
  }

  @Override
  public void addTab(@NonNull Tab tab, int position, boolean setSelected) {
    super.addTab(tab, position, setSelected);

    ViewGroup mainView = (ViewGroup) getChildAt(0);
    ViewGroup tabView = (ViewGroup) mainView.getChildAt(tab.getPosition());
    int tabChildCount = tabView.getChildCount();
    for (int i = 0; i < tabChildCount; i++) {
      View tabViewChild = tabView.getChildAt(i);
      if (tabViewChild instanceof TextView) {
        CalligraphyUtils.applyFontToTextView(getContext(), (TextView) tabViewChild, fontPath);
      }
    }
  }
}

layout.xml

<com.adaptics.dropkitchen.ui.base.widget.FontAwareTabLayout
        android:id="@+id/browser_tab"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:animateLayoutChanges="true"
        android:background="?attr/colorPrimary"
        android:theme="@style/AppTheme.AppBarOverlay"
        app:layout_scrollFlags="scroll|enterAlways"
        app:tabBackground="@color/white"
        app:tabGravity="center"
        app:tabMode="scrollable"
        app:tabSelectedTextColor="@color/colorPrimary"
        app:tabTextAppearance="@style/RecipesBrowserTabTextStyle"
        fontPath="@string/common_fonts_sans_condensed_bold"
        />