[Android] SharedPreference 사용법

// 저장하기
SharedPreferences pref = getSharedPreferences(Consts.PREF_KEY, Activity.MODE_PRIVATE);
    SharedPreferences.Editor editor = pref.edit();

    String keyword = m_etKeyword.getText().toString();
    editor.putString(Consts.PREF_KEYWORD, keyword);
    editor.commit();

// 읽기
SharedPreferences pref = getSharedPreferences(Consts.PREF_KEY, Activity.MODE_PRIVATE);
   String keyworkd = pref.getString(Consts.PREF_KEYWORD, null);