FontUtils.java

public class FontUtils {

    public static void wrap(TextView textView) {
        if (textView != null) {
            try {
                String fontName = FontUtils.fontName(textView);
                if (fontName != null) {
                    Typeface typeface = Typeface.createFromAsset(textView.getContext().getAssets(), "fonts/" + fontName);
                    textView.setTypeface(typeface);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    private static String fontName(TextView textView) {
        if (textView.getTypeface() != null) {
            int style = textView.getTypeface().getStyle();

            if (textView.getTypeface().isBold()) {
                return "bold.otf";
            } else  if (textView.getTypeface().isItalic()) {
                return "italic.otf";
            } else if ((style & Typeface.BOLD_ITALIC) != 0) {
                return "bold_italic.otf";
            }
        }
        return "regular.otf";
    }
}