android：如何保存我的用户界面并在重启后找回它？

Question

Sorry I am totally new to Android

My application has a very simple GUI (2 checkboxes, 3 textiputs). I want to save the value of these widgets (checkboxes, textinputs), so after I reboot my andorid they keep their values.

I guess I can use some local stoarge or db storage, but I am not fluent enough to pick up the fastest/better solution to do that?

Regards

Answer 1

Here is the documentation for storing data in Android

Since you are working with a small amount of data to be saved, I'd recommend option #1: Saving Key-Value Sets aka SharedPreferences

You can do it as follows

Writing to Shared Preferences

SharedPreferences shp = getActivity().getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = shp.edit();
editor.putString("YourPreferenceName", yourVariable);
editor.commit();

Reading from Shared Preferences

SharedPreferences shp = getActivity().getPreferences(Context.MODE_PRIVATE);
String yourVariable= shp.getString"YourPreferenceName", "default");

Answer 2

Store the values in SharedPreferences . Alternatively, read the page on Settings screens (which use SharedPreference s behind the scenes).

Answer 3

You can use PreferenceFragment which can automagically store those values in the SharedPreferences . Here is a good tutorial . If thats all you need to store locally, using PreferenceFragment will save you time coding saving/retrieving/displaying those values from SharedPreferences yourself.