监听SharedPreference变化的方法

/**

* A listener for all the change in the preference file. It is used to maintain the global state of the application.

*/

private class PreferenceListener implements SharedPreferences.OnSharedPreferenceChangeListener {

/**

* Constructor.

*/

public PreferenceListener() {

}

@Override

public void onSharedPreferenceChanged(SharedPreferences  sharedPreferences, String key) {

if (UipApplication.ACCOUNT_USERNAME_KEY.equals(key) || UipApplication.ACCOUNT_PASSWORD_KEY.equals(key)) {

String login = Config.username.get();

String password = Config.password.get();

mIsAccountConfigured = !("".equals(login) || "".equals(password));

}

}

}