android - What is the point of using titleTextStyle? -

What does it mean to use titleTextStyle? If you have a theme and you define the action, then there is no text style, and the color is already being applied in the action bar? Title- What is the benefit of defining textile properties? The two codes below generate the same results. What is the reason for using one on the other? The only thing I could imagine was probably the backdrop of the text? Could you have another background for text and another for the actual action bar? But there should be more reason to add text, assuming only one difference, the background will be easier to define a set of text attributes, so I do not know what I am missing, in all other positions there were problems with the help library and the general Thanksgiving ways to define styles by

  & lt; Style name = "windowTheme" guardian = "@ style / theme.applicpt" & gt; & Lt; Item name = "Android: Typeface" & gt; Serif & lt; / Item & gt; & Lt ;! - Action bar information - & gt; & Lt; Item name = "Actionbarstyle" & gt; @ Style / action-theme theme & lt; / Item & gt; & Lt; Item name = "action button style" & gt; @ Style / actionbar button style & lt; / Item & gt; & Lt; Item name = "Action menu text aperance" & gt; @ Style / ActionbarListening & lt; / Item & gt; & Lt; / Style & gt; & Lt ;! - Action Bar Definitions - & gt; & Lt; Style name = "actionbeartheme" parent = "@ style / widget.AppCompat.ActionBar" & gt; ** & lt; Item name = "Android: Typeface" & gt; Serif & lt; / Item & gt; & Lt; Item name = "Android: Text Style" & gt; Bold & lt; / Item & gt; And <00 & lt; / Style & gt; & Lt; Style name = "ActionBarButtonStyle" parent = "@ style / textAppearance.AppCompat.Widget.ActionBar.Title" & gt; & Lt; Item name = "android: textcolor" & gt; # Ff0014ff & lt; / Item & gt; & Lt; Item name = "Android: Text Style" & gt; Bold & lt; / Item & gt; & Lt; / Style & gt; & Lt; Style name = "Actionbarlistings" parent = "@ style / text expression.opcomplete visit.actionbart.title" & gt; & Lt; Item name = "android: textcolor" & gt; # Ff0014ff & lt; / Item & gt; & Lt; Item name = "Android: Text Style" & gt; Bold & lt; / Item & gt; & Lt; / Style & gt; & Lt; Style name = "windowTheme" guardian = "@ style / theme.AppCompat" & gt; & Lt; Item name = "Android: Typeface" & gt; Serif & lt; / Item & gt; & Lt ;! - Action bar information - & gt; & Lt; Item name = "Actionbarstyle" & gt; @ Style / action-theme theme & lt; / Item & gt; & Lt; Item name = "action button style" & gt; @ Style / actionbar button style & lt; / Item & gt; & Lt; Item name = "Action menu text aperance" & gt; @ Style / ActionbarListening & lt; / Item & gt; & Lt; / Style & gt; & Lt ;! - Action Bar Definitions - & gt; & Lt; Style name = "actionbeartheme" parent = "@ style / widget.AppCompat.ActionBar" & gt; & Lt; Item name = "Android: Typeface" & gt; Serif & lt; / Item & gt; ** & lt; Item name = "android: titleTextStyle" gt; @ Style / titleTextStyleAttributes & lt; / Item & gt; ** & lt; Item name = "android: background" & gt; # Ffff0000 & lt; / Item & gt; & Lt; / Style & gt; ** & lt; Style name = "titleTextStyleAttributes" parent = "@ style / textAppearance.AppCompat.Widget.ActionBar.Title" & gt; & Lt; Item name = "android: textcolor" & gt; # Ff0014ff & lt; / Item & gt; & Lt; Item name = "Android: Text Style" & gt; Bold & lt; / Item & gt; & Lt; / Style & gt; ** & lt; Style name = "ActionBarButtonStyle" parent = "@ style / textAppearance.AppCompat.Widget.ActionBar.Title" & gt; & Lt; Item name = "android: textcolor" & gt; # Ff0014ff & lt; / Item & gt; & Lt; Item name = "Android: Text Style" & gt; Bold & lt; / Item & gt; & Lt; / Style & gt; & Lt; Style name = "Actionbarlistings" parent = "@ style / text expression.opcomplete visit.actionbart.title" & gt; & Lt; Item name = "android: textcolor" & gt; # Ff0014ff & lt; / Item & gt; & Lt; Item name = "Android: Text Style" & gt; Bold & lt; / Item & gt; & Lt; / Style & gt;