code: public static void showText(Activity activity, CharSequence text, Style style) {
      makeText(activity, text, style).show();
    }
docs: Creates a {@link Crouton} with provided text and style for a given activity
  and displays it directly.
  
  @param activity
  The {@link android.app.Activity} that the {@link Crouton} should
  be attached to.
  @param text
  The text you want to display.
  @param style
  The style that this {@link Crouton} should be created with.