I need to save some int and boolean for the setting, and for now i'm doing it with SharedPreference, I'd like to know if there are problems with this way, can i stay sure that those data won't be touched or lost? There are contraindications in using this way?
And now the real problem: i need to save some strings, that are basically something like... text description of some urls and the urls, but i don't really think that SharedPreference would work since i don't know how many those items can be, they may be 5, 8, 10, i don't know, those data will be downloaded via internet, so: how could i save them?
I'm not really good at Android programming, but i studied Java a lot of time ago, could i just save it as a file and parse it? I think I could create a Serializable wrapper class and write the items in a file but... is it really safe? users could edit those file or delete them, i think it maybe better if i could save them in some... "locked for app-only" folder, does something like that even exists? And if yes, how do i access it?
SharedPreference is based on a xml file stored in app folder. It's secure like write info on another xml file. It's mainly used for app configuration. For other kind of data, it's better to use database (SQLite) or in json (more performance than xml).
In android, you will use many concept you already studied on desktop version of Java. But the platform is quite differente, especially on performance point of view.