The use of SharedPreferences outside of an Activity Class can become very tedious. This is because PreferenceManager.getDefaultSharedPreferences(Context context) requires a context object. In order to simplify things an easy solution is to use the Application object like this.
public class MyApplication extends Application {
public static SharedPreferences settings;
@Override
public void onCreate() {
super.onCreate();
settings=PreferenceManager.
getDefaultSharedPreferences(this);
}
}
This code will work because the Application object is created before all other activities, hence the initialization is guaranteed. Now the SharedPreferences can be simply statically accessed via MyApplication.settings.