1、在Android中我们可以通过下面这段代码获取SIM的iccid，关于手机中常用术语简介可参考《Android中CS域和PS域以及手机中常用术语简介》
TelephonyManager telephonyManager=(TelephonyManager) getSystemService(TELEPHONY_SERVICE); String simSerialNumber = telephonyManager.getSimSerialNumber();
注：ICCID (Integrate circuit card identity ) 集成电路卡识别码(固化在手机SIM 卡中) ICCID 为IC 卡的唯一识别号码，共有20 位数字组成。
但调用这个方法有时候并不能获取到20位完整的SIM iccid，怀着好奇心看了下android源码，下面就来一层层揭开这面纱。
frameworks/base/telephony/java/android/telephony/TelephonyManager.java
public String getSimSerialNumber(int subId) {
android.util.SeempLog.record_str(388, ""+subId);
try {
IPhoneSubInfo info = getSubscriberInfo();
if (info == null)
return null;
return info.getIccSerialNumberForSubscriber(subId, mContext.getOpPackageName());
} catch (RemoteException ex) {
return null;
} catch (NullPointerException ex) {
// This could happen before phone restarts due to crashing
return null;
}
}
getIccSerialNumberForSubscriber是在PhoneSubInfoController.java中实现，具体方式如下：
frameworks/opt/telephony/src/java/com/android/internal/telephony/PhoneSubInfoController.java
public String getIccSerialNumberForSubscriber(int subId, String callingPackage) {
Phone phone = getPhone(subId);
if (phone != null) {
if (!checkReadPhoneState(callingPackage, "getIccSerialNumber")) {
return null;
}
return phone.getIccSerialNumber();
} else {
loge("getIccSerialNumber phone is null for Subscription:" + subId);
return null;
}
}
getIccSerialNumber是在GsmCdmaPhone.java实现：
frameworks/opt/telephony/src/java/com/android/internal/telephony/GsmCdmaPhone.java
@Override
public String getIccSerialNumber() {
IccRecords r = mIccRecords.get();
if (!isPhoneTypeGsm() && r == null) {
// to get ICCID form SIMRecords because it is on MF.
r = mUiccController.getIccRecords(mPhoneId, UiccController.APP_FAM_3GPP);
}
return (r != null) ? r.getIccId() : null;
}
getIccId是IccRecords.java中定义的，但其赋值是在IccRecords的两个子类SIMRecords.java和RuimRecords.java中赋值的
frameworks/opt/telephony/src/java/com/android/internal/telephony/uicc/SIMRecords.java
// ***** Overridden from Handler
@Override
public void handleMessage(Message msg) {
AsyncResult ar;
AdnRecord adn;
byte data[];
boolean isRecordLoadResponse = false;
if (mDestroyed.get()) {
loge("Received message " + msg + "[" + msg.what + "] " +
" while being destroyed. Ignoring.");
return;
}
try { switch (msg.what) {
case EVENT_GET_ICCID_DONE:
isRecordLoadResponse = true;
ar = (AsyncResult)msg.obj;
data = (byte[])ar.result;
if (ar.exception != null) {
break;
}
mIccId = IccUtils.bcdToString(data, 0, data.length);
mFullIccId = IccUtils.bchToString(data, 0, data.length);
log("iccid: " + SubscriptionInfo.givePrintableIccid(mFullIccId));
break;
...
default:
super.handleMessage(msg); // IccRecords handles generic record load responses
}}catch (RuntimeException exc) {
// I don't want these exceptions to be fatal
logw("Exception parsing SIM record", exc);
} finally {
// Count up record load responses even if they are fails
if (isRecordLoadResponse) {
onRecordLoaded();
}
}
}
EVENT_GET_ICCID_DONE是在IccFileHandler.java@loadEFTransparent里调用
public void loadEFTransparent(int fileid, Message onLoaded) {
Message response = obtainMessage(EVENT_GET_BINARY_SIZE_DONE,
fileid, 0, onLoaded);
mCi.iccIOForApp(COMMAND_GET_RESPONSE, fileid, getEFPath(fileid),
0, 0, GET_RESPONSE_EF_SIZE_BYTES, null, null, mAid, response);
}
这里会调用RIL.java里的iccIOForApp向modem发送查询请求，有结果返回后便会调用EVENT_GET_ICCID_DONE对mIccId进行赋值
frameworks/opt/telephony/src/java/com/android/internal/telephony/uicc/IccUtils.java
public static String
bcdToString(byte[] data, int offset, int length) {
StringBuilder ret = new StringBuilder(length*2);
for (int i = offset ; i < offset + length ; i++) {
int v;
v = data[i] & 0xf;
if (v > 9) break;
ret.append((char)('0' + v));
v = (data[i] >> 4) & 0xf;
// Some PLMNs have 'f' as high nibble, ignore it
if (v == 0xf) continue;
if (v > 9) break;
ret.append((char)('0' + v));
}
return ret.toString();
}
可以看到在bcdToString时，如果data里面包含非0-9的字符，就只取第一个非0-9的字段
eg：8986011785a113040534 ,按照这个方法获取的为8986011785
当然在GsmCdmaPhone@getFullIccSerialNumber，这个方法在调用的时候，只是调用了IccUtils.bchToString
/** * Some fields (like ICC ID) in GSM SIMs are stored as nibble-swizzled BCH */
public static String
bchToString(byte[] data, int offset, int length) {
StringBuilder ret = new StringBuilder(length*2);
for (int i = offset ; i < offset + length ; i++) {
int v;
v = data[i] & 0xf;
ret.append("0123456789abcdef".charAt(v));
v = (data[i] >> 4) & 0xf;
ret.append("0123456789abcdef".charAt(v));
}
return ret.toString();
}
此时获取到的iccid才是完整的，然而现在很多sim卡的iccid包含0-f之外的字符，还是不能取到完整的iccid，如果你有好的方案，欢迎留言指教，谢谢！ eg：8986011785N113040534，不能获取到正确完整的20位iccid