This street vendor is selling an afternoon fruit/sweet.snack. The vendors come around at different times of the day selling diferent things – in the morning, “jamu” a healthy drink, for lunch “bakso” a pork/noodle vegetable soup, in the afternoon, fruit. They usually have some kind of bell to let you know he is there.
In Java, each type of food vendor has a distinctly different sound, or bell, so you can tell by sound what the vendor is offering. My favorite in Java is a coconut desert that is served in the evening. They are heated in cylindrical cones – shaped like a popsicle, except warm and they make a whistling sound.