android 获取手机运营商

/**
 * 获取当前的运营商
 *
 * @param context
 * @return 运营商名字
 */
public static String getOperator(Context context) {


    String ProvidersName = "";
    TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
    String IMSI = telephonyManager.getSubscriberId();
    Log.i("qweqwes", "运营商代码" + IMSI);
    if (IMSI != null) {
        if (IMSI.startsWith("46000") || IMSI.startsWith("46002") || IMSI.startsWith("46007")) {
            ProvidersName = "中国移动";
        } else if (IMSI.startsWith("46001")  || IMSI.startsWith("46006")) {
            ProvidersName = "中国联通";
        } else if (IMSI.startsWith("46003")) {
            ProvidersName = "中国电信";
        }
        return ProvidersName;
    } else {
        return "没有获取到sim卡信息";
    }
}