意外的telephonyManager.getSimCountryIso()行为

问题描述

我正在创建一个应用程序，该应用程序将根据您的移动网络提供商所在的国家/地区显示该国家/地区的所有替代移动网络提供商的列表.为此，我正在使用 telephonyManager.getSimCountryIso( ).

I am creating an app that depending on which country your mobile network provider is from, displays a list of all alternative mobile network providers from that same country. To achieve this, I was retrieving the country code using telephonyManager.getSimCountryIso().

官方android开发人员说:返回与SIM卡提供商的国家/地区代码对应的ISO国家/地区代码"，因此我希望国家/地区代码始终独立于设备位置而始终相同.但这不是它实际的工作方式！例如，我最近遇到了这种情况:我有一个来自西班牙的SIM卡的android设备，该设备属于西班牙网络提供商.因此，如果我在西班牙，TelephonyManager.getSimCountryIso()将返回"es".到那时一切都很好. 问题是例如，当我去法国旅行时，我调试了该应用程序并发现telephonyManager.getSimCountryIso()返回的国家代码为:"nl"(来自荷兰！?并且我在法国漫游但使用相同的西班牙SIM卡！).我在西班牙使用的设备和SIM卡与西班牙相同，因此国家/地区代码ISO仍应为"es".

Official android developer docs say : "Returns the ISO country code equivalent for the SIM provider's country code", so from this I was expecting country code will always be always the same independently from device location. But thats not how it actually works!For example I recently experienced this case: I have an android device with SIM card from Spain belonging to a spanish network provider. So if I am in Spain telephonyManager.getSimCountryIso() returns "es". Everything working fine to that point. The problem is when I travel to France for example I debug the app and find out the telephonyManager.getSimCountryIso() is returning country code: "nl" (from Netherlands!? and I am in France in roaming but with the same spanish SIM card!). I am using the same device and the same SIM card than in Spain so country code ISO should still be "es".

我的问题是这种方法实际上是如何工作的?如果我使用西班牙SIM卡，为什么会收到国家代码"nl"(荷兰)?

My question is How does this method actually work? why am I getting country code "nl" ( Netherlands) if I am using a spanish SIM card?

预先感谢您的帮助

推荐答案

您可以使用 MCC MNC来获取SIM卡所在的国家/地区，它已配置为SIM卡，与您所处的网络无关.

You can use MCC MNC to get SIM country, it is SIM configured and has nothing to do with the network you are on.

Configuration config = getResources().getConfiguration();
int countryCode = config.mcc;

您可以在 MccTable.java

例如，西班牙为214，法国为208

For example Spain is 214 and France is 208

对于CDMA设备，我找到了以下解决方案

For CDMA devices I found the following solution

if (telephonyManager.getPhoneType() == TelephonyManager.PHONE_TYPE_CDMA) {
    Class<?> c = Class.forName("android.os.SystemProperties");
    Method get = c.getMethod("get", String.class);

    // Gives MCC + MNC
    String homeOperator = ((String) get.invoke(c, "ro.cdma.home.operator.numeric")); 
    String country = homeOperator.substring(0, 3); // the last three digits is MNC 
} else {
    Configuration config = getResources().getConfiguration();
    int countryCode = config.mcc;
}

这篇关于意外的telephonyManager.getSimCountryIso()行为的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！