How to use SharedPreferences as LocalStore, in more generic way?

Question

Being new in Android world and advancing with joy day by day ;) I would like to share examples about common usage.

Here comes example about using SharedPreferences with generic LocalStore class.

create a common class to be used by your main activity or by any of sub-activity.

    public class LocalStore {

        private static final String TAG = "LocalStore";
        private static final String PREF_FILE_NAME = "userprefs";

        public static void clear(Context context) {
            clear(context, "unknown");
        }
        public static void clear(Context context, String caller) {
            Editor editor = 
                context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE).edit();
            editor.clear();
            editor.commit();
            Log.d(TAG, "caller:"+caller + "|clear LocalStore");
        }

        public static boolean setCustomBooleanData(String key, boolean value, Context context) {
        Editor editor =
            context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE).edit();
        editor.putBoolean(key, value);

        return editor.commit(); 
    }
    public static boolean getCustomBooleanData(String key, Context context) {
        SharedPreferences savedSession =
            context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);

        return (savedSession.getBoolean(key, false));
    }

    public static boolean setCustomStringData(String key, String value, Context context) {
        Editor editor =
            context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE).edit();
        editor.putString(key, value);

        return editor.commit(); 
    }
    public static String getCustomStringData(String key, Context context) {
        SharedPreferences savedSession =
            context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);

        return (savedSession.getString(key, null));
    }


    public static boolean isCustomStringExistInLocal(String customKey, Context context) {
        SharedPreferences savedSession =
            context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);

        return (savedSession.getString(customKey, null))==null?false:true;
    }

public static boolean saveObject(String objKey, Serializable dataObj, Context context) {
        Editor editor =
            context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE).edit();
        editor.putString(objKey, ObjectSerializer.serialize(dataObj) );

        Log.d(TAG, "savedObject| objKey:"+objKey+"/" + dataObj.toString());

        return editor.commit(); 
    }
    public static Object getObject(String objKey, Context context) {
        SharedPreferences savedSession =
            context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);

        Object dataObj = ObjectSerializer.deserialize(savedSession.getString(objKey, null));

        return dataObj;
    }

    }

Note: You can use ObjectSerializer from here

Enjoy!

Answer 1

this was an example to share knowledge and not a question :)

Answer 2

This is kind of a Q&A site.