How to save information using Shared Preference in Android?

There are many ways to save the data in Android devices. One of them is using the shared preferences more like a key/value pair of data.

How to read the preference?
1) Get the sharedpreference for the preference name
ex) SharedPreferences prefs = ctx.getSharedPreferences(prefName,0);
2) Get all the key value pairs from the preference
ex) Map data = prefs.getAll();
3) Iterate through the map and you can retrive the data for your key.

How to Save the Preference?

1) Get the sharedpreference editor for the preference
SharedPreferences.Editor prefs =
context.getSharedPreferences(getPrefname(), 0).edit();
2) add the key and value to the preference
prefs.putString(newkey, value);

3) Commit your changes
prefs.commit();


How to remove preference?
1)Do all the above steps to get the editor and then use the remove method to remove the preference.
prefs.remove(newkey);