Upgrade to target Android API 32.
Replace deprecated job intent service.
Replace deprecated fragment manager.
Find your way around Sapporo city's subway using the high resolution vector maps of the train network. The following metro rail lines are available: Namboku, Tozai, and Toho lines. The maps have small file size footprints but with many levels of zoom and can work offline without connecting to the Internet. Users can click the train station box labels to open Google Maps or Google StreetView, where they can use all the functions of the Google apps to visualize the surrounding area and/or perform routing for directions. There is also an offline function to calculate the best way to travel from a station to another station with a direction breakdown and timings (which may vary from the actual travelling time).
* Now with dark mode setting.
