Android Shared Preferences

Saving values 

        Context ctx = AppUtils.getAppContext();

        if(ctx != null && prefKey != null && prefValue != null)

        {

            Log.v(LOG_TAG,"context value exists: "+ctx);

            this.sensorPreferenceStorage = ctx.getSharedPreferences(PREFERNCE_STORE,  AppUtils.getAppContext().MODE_PRIVATE);

            Log.v(LOG_TAG,"preference storage is :"+this.sensorPreferenceStorage);

            SharedPreferences.Editor editor = this.sensorPreferenceStorage.edit();

            editor.putString(prefKey,prefValue);

            editor.commit();

        }

Reading value 

        Context ctx = AppUtils.getAppContext();

        Log.v(LOG_TAG,"getting the Sensor preferece value for key:"+preferenceKey);

        if(ctx != null && preferenceKey != null)

        {

            this.sensorPreferenceStorage = ctx.getSharedPreferences(PREFERNCE_STORE,  AppUtils.getAppContext().MODE_PRIVATE);

            String strVal = this.sensorPreferenceStorage.getString(preferenceKey, null);

            Log.v(LOG_TAG,"value retrieved is:"+strVal);

            return strVal;

        }

References: 

http://developer.android.com/reference/android/content/SharedPreferences.html