preferences.getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
mDecode1D = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_1D);
mDecodeQR = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_QR);
preferences.getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
mDecode1D = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_1D);
mDecodeQR = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_QR);