问题
Assuming a method of mine was passed a Bundle already filled with data to be saved, is there a way to save it to SharedPreferences without taking it apart to ints, floats, Strings, etc.?
I prefer the convenience of writing/committing it all in "one fell swoop", so if this isn't possible using SharedPreferences, what other persistent storage approach would you recommend?
回答1:
as far as I know, you can save only primitive data (and their wrappers) to SharedPreferences
why don't you create your own helper method which will iterate through Bundle and save all values from it to SharedPreferences?
回答2:
SharedPreferences are serialized to XML, which is why you can only use simple types. You'll either have to do your own conversion of the bundle to individual SharePreferences properties or serialize the bundle some other way to disk.
Here's a good reference document discussing the various possibilities of storing data in Android: http://developer.android.com/guide/topics/data/data-storage.html
来源：https://stackoverflow.com/questions/11903718/saving-an-entire-bundle-to-sharedpreferences