关于android SharedPreference的问题，在线等！谢谢！！！

Question

SharedPreferences 有没有办法根据vlaue获取对应的key值，除了循环SharePreferences里面的内容。

Answer 1

You should note that while keys are guaranteed to be unique in SharedPreferences, there's no guarantee that the values will be unique. As such, this function will only return the key for the first matching value.

 String findKey(SharedPreferences sharedPreferences, String value) {
    for (Map.Entry<String, ?> entry: sharedPreferences.getAll()) {
        if (value.equals(entry.getValue())) {
            return entry.getKey();
        }
    }
    return null; // not found
}