How can you get and set value from SharedPreferences in android

Firstly you can chack if sharedpreference contains value than you can retrive this value by using getSharedPreference() function otherwise you can set value .

public static String checkVisitorId(){
public static final String DigitalEditionConstantPREFS_NAME="test";
SharedPreferences settings = getSharedPreferences(MyConstantPREFS_NAME, 0);
visitorID = settings.getString("VisitorID", false);
if(visitorID){
return visitorID;
} else {
visitorID="123";
SharedPreferences.Editor editor=settings.edit();
editor.putString("VisitorID", visitorID);
editor.commit();
return visitorID;
}