Question

I have an application which has a Prefernces Class and I want to know how could i make so that when the application is started the settings to be applied even before entering the preferences ( settings ) class. I have a getPrefs() void method which is called when i press “Save” Button in preference activity.

So, could you help me and tell what should I do the “default” preferences to be applied when entering the application ? (I need getprefs method from another class )

I would be grate if you could give me some advices or tips.Thank you !

Answer 1

To get an instance of the SharedPreferences from anywhere in your application use:

SharedPreferences prefs = PreferenceManager.getDefaultSharedPrefences(context);

To set a value in the preferences, you need to call the editor for those preferences, then set the value for a key and finally commit the result. It can all be done in a single line:

prefs.edit().putString("myKey","myValue").commit();

This would store the string value myValue on a key named myKey and it will be accessible (after you commit) to any class if it has the application’s context when it calls getDefaultSharedPreferences.

To retrieve the stored value you specify the key and a fallback value in case there is no preference set with that key:

prefs.getString("myKey","oops no value found");