Preferences.java 文件源码

/**
 * This method stops fragment injection in malicious applications.
 * Make sure to deny any unknown fragments here.
 */
protected boolean isValidFragment(String fragmentName) {
    return PreferenceFragment.class.getName().equals(fragmentName)
            || GeneralPreferenceFragment.class.getName().equals(fragmentName)
            || PasswordPreferenceFragment.class.getName().equals(fragmentName)
            || DateOfBirthPreferenceFragment.class.getName().equals(fragmentName);
}