setLabelText is not working!!!

[kotran88]

image clicked

as above,
even though I set Text on floatingactionbutton, text is not shown,

my code is as belows. I don't think code is problem because I get it from example code in here.

ContextThemeWrapper context = new ContextThemeWrapper(ccontext, R.style.MenuButtonsStyle);
FloatingActionButton programFab2 = new FloatingActionButton(context);
programFab2.setLabelText("Programmatically added button");
programFab2.setImageResource(R.drawable.addicon);

                               ` actionMenu.addMenuButton(programFab2);`