本文实例讲述了Android4.X中SIM卡信息初始化过程详解。分享给大家供大家参考，具体如下：
Phone 对象初始化的过程中，会加载SIM卡的部分数据信息，这些信息会保存在IccRecords 和 AdnRecordCache 中。SIM卡的数据信息的初始化过程主要分为如下几个步骤
1.RIL 和 UiccController 建立监听关系 ，SIM卡状态发生变化时，UiccController 第一个去处理。
Phone 应用初始化 Phone 对象时会建立一个 RIL 和UiccController 的监听关系：UiccController 监听 RIL,相关代码如下
sCommandsInterface = new RIL(context, networkMode, cdmaSubscription); UiccController.make(context, sCommandsInterface);
UiccController 构造的过程
private UiccController(Context c, CommandsInterface ci) {
if (DBG) log("Creating UiccController");
mContext = c;
mCi = ci;
mCi.registerForIccStatusChanged(this, EVENT_ICC_STATUS_CHANGED, null);
// TODO remove this once modem correctly notifies the unsols
mCi.registerForOn(this, EVENT_ICC_STATUS_CHANGED, null);
}
从代码中可以看出，UiccController 对象被注册为RIL对象的监听者，当 RIL 检测到 uicc card 状态发生变化或者 radio on UiccController 都会处理对应的数据变化。UiccController 是 SIM卡状态发生变化后的第一个处理者。
UiccController 处理 EVENT_ICC_STATUS_CHANGED
public void handleMessage (Message msg) {
synchronized (mLock) {
switch (msg.what) {
case EVENT_ICC_STATUS_CHANGED:
if (DBG) log("Received EVENT_ICC_STATUS_CHANGED, calling getIccCardStatus");
mCi.getIccCardStatus(obtainMessage(EVENT_GET_ICC_STATUS_DONE));
break;
case EVENT_GET_ICC_STATUS_DONE:
if (DBG) log("Received EVENT_GET_ICC_STATUS_DONE");
AsyncResult ar = (AsyncResult)msg.obj;
onGetIccCardStatusDone(ar);
break;
default:
Rlog.e(LOG_TAG, " Unknown Event " + msg.what);
}
}
}
从代码中可以看出，RIL 上报 SIM卡状态发生变化后，做了两件事，一是获取SIM卡的具体状态，二是处理这个状态。
UiccController 处理具体的SIM卡状态
private synchronized void onGetIccCardStatusDone(AsyncResult ar) {
if (ar.exception != null) {
Rlog.e(LOG_TAG,"Error getting ICC status. "
+ "RIL_REQUEST_GET_ICC_STATUS should "
+ "never return an error", ar.exception);
return;
}
IccCardStatus status = (IccCardStatus)ar.result;
if (mUiccCard == null) {
//Create new card
mUiccCard = new UiccCard(mContext, mCi, status);
} else {
//Update already existing card
mUiccCard.update(mContext, mCi , status);
}
if (DBG) log("Notifying IccChangedRegistrants");
mIccChangedRegistrants.notifyRegistrants();
}
从代码中可以看出，做了两件事，
一是 创建或者 更新 UiccCard
二是 通知监听 UiccController 的监听者。
2.创建或者更新 UiccCard，UiccCard 创建或者更新与SIM卡类型对应的UiccCardApplication.
一个UiccCard 对象代表着一张SIM卡，UiccCard 根据获取的SIM卡信息创建 UiccCardApplication,UiccCardApplication去读取具体的SIM卡里的信息。
更新UiccCard
public void update(Context c, CommandsInterface ci, IccCardStatus ics) {
synchronized (mLock) {
if (mDestroyed) {
loge("Updated after destroyed! Fix me!");
return;
}
CardState oldState = mCardState;
mCardState = ics.mCardState;
mUniversalPinState = ics.mUniversalPinState;
mGsmUmtsSubscriptionAppIndex = ics.mGsmUmtsSubscriptionAppIndex;
mCdmaSubscriptionAppIndex = ics.mCdmaSubscriptionAppIndex;
mImsSubscriptionAppIndex = ics.mImsSubscriptionAppIndex;
mContext = c;
mCi = ci;
//update applications
if (DBG) log(ics.mApplications.length + " applications");
for ( int i = 0; i < mUiccApplications.length; i++) {
if (mUiccApplications[i] == null) {
//Create newly added Applications
if (i < ics.mApplications.length) {
mUiccApplications[i] = new UiccCardApplication(this,
ics.mApplications[i], mContext, mCi);
}
} else if (i >= ics.mApplications.length) {
//Delete removed applications
mUiccApplications[i].dispose();
mUiccApplications[i] = null;
} else {
//Update the rest
mUiccApplications[i].update(ics.mApplications[i], mContext, mCi);
}
}
if (mUiccApplications.length > 0 && mUiccApplications[0] != null) {
// Initialize or Reinitialize CatService
mCatService = CatService.getInstance(mCi,
mContext,
this);
} else {
if (mCatService != null) {
mCatService.dispose();
}
mCatService = null;
}
sanitizeApplicationIndexes();
RadioState radioState = mCi.getRadioState();
if (DBG) log("update: radioState=" + radioState + " mLastRadioState="
+ mLastRadioState);
// No notifications while radio is off or we just powering up
if (radioState == RadioState.RADIO_ON && mLastRadioState == RadioState.RADIO_ON) {
if (oldState != CardState.CARDSTATE_ABSENT &&
mCardState == CardState.CARDSTATE_ABSENT) {
if (DBG) log("update: notify card removed");
mAbsentRegistrants.notifyRegistrants();
mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_REMOVED, null));
} else if (oldState == CardState.CARDSTATE_ABSENT &&
mCardState != CardState.CARDSTATE_ABSENT) {
if (DBG) log("update: notify card added");
mHandler.sendMessage(mHandler.obtainMessage(EVENT_CARD_ADDED, null));
}
}
mLastRadioState = radioState;
}
}
IccCardStatus,记录了RIL 读取的SIM卡的信息，UiccCard 根据 IccCardStatus 中记录的应用程序信息，创建 UiccCardApplication.
UiccCard 还创建了 CatService,用于读取 STK 的信息。
创建或者更新 UiccCardApplication
UiccCardApplication,会记录对应的卡的状态，类型，以及卡的记录信息。
//创建 UiccCardApplication
UiccCardApplication(UiccCard uiccCard,
IccCardApplicationStatus as,
Context c,
CommandsInterface ci) {
if (DBG) log("Creating UiccApp: " + as);
mUiccCard = uiccCard;
mAppState = as.app_state;
mAppType = as.app_type;
mPersoSubState = as.perso_substate;
mAid = as.aid;
mAppLabel = as.app_label;
mPin1Replaced = (as.pin1_replaced != 0);
mPin1State = as.pin1;
mPin2State = as.pin2;
mContext = c;
mCi = ci;
mIccFh = createIccFileHandler(as.app_type);
mIccRecords = createIccRecords(as.app_type, mContext, mCi);
///读取 SIM卡上的 EF 文件信息
if (mAppState == AppState.APPSTATE_READY) {
queryFdn(); // FDN 信息
queryPin1State(); // Pin State
}
}
//更新UiccCardApplication
void update (IccCardApplicationStatus as, Context c, CommandsInterface ci) {
synchronized (mLock) {
if (mDestroyed) {
loge("Application updated after destroyed! Fix me!");
return;
}
if (DBG) log(mAppType + " update. New " + as);
mContext = c;
mCi = ci;
AppType oldAppType = mAppType;
AppState oldAppState = mAppState;
PersoSubState oldPersoSubState = mPersoSubState;
mAppType = as.app_type;
mAppState = as.app_state;
mPersoSubState = as.perso_substate;
mAid = as.aid;
mAppLabel = as.app_label;
mPin1Replaced = (as.pin1_replaced != 0);
mPin1State = as.pin1;
mPin2State = as.pin2;
if (mAppType != oldAppType) {
if (mIccFh != null) { mIccFh.dispose();}
if (mIccRecords != null) { mIccRecords.dispose();}
mIccFh = createIccFileHandler(as.app_type);
mIccRecords = createIccRecords(as.app_type, c, ci);
}
if (mPersoSubState != oldPersoSubState &&
mPersoSubState == PersoSubState.PERSOSUBSTATE_SIM_NETWORK) {
notifyNetworkLockedRegistrantsIfNeeded(null);
}
if (mAppState != oldAppState) {
if (DBG) log(oldAppType + " changed state: " + oldAppState + " -> " + mAppState);
// If the app state turns to APPSTATE_READY, then query FDN status,
//as it might have failed in earlier attempt.
if (mAppState == AppState.APPSTATE_READY) {
queryFdn();// FDN 信息
queryPin1State();
}
notifyPinLockedRegistrantsIfNeeded(null);
notifyReadyRegistrantsIfNeeded(null);
}
}
}
在更新和创建UiccCardApplication的过程中，有如下几个重要的变量
IccRecords
记录 SIM卡上的EF 文件信息，实现类有SIMRecords,RuimRecords,IsimUiccRecords,对应于不同的类型的SIM卡。
IccFileHandler
根据SIM卡的类型，去读取SIM卡上的信息，实现类有SIMFileHandler，RuimFileHandler，UsimFileHandler，CsimFileHandler，IsimFileHandler，对应于不同的SIM卡。
创建 IccRecords 对象
正如前面所描述的，IccRecords 记录SIM卡的EF文件信息，具体的读取SIM卡EF文件信息的过程是由 IccFileHandler 来实现的，以 SIMRecords 为例。
public SIMRecords(UiccCardApplication app, Context c, CommandsInterface ci) {
super(app, c, ci);
// 1.电话本的缓存
mAdnCache = new AdnRecordCache(mFh);
mVmConfig = new VoiceMailConstants();
mSpnOverride = new SpnOverride();
mRecordsRequested = false; // No load request is made till SIM ready
// recordsToLoad is set to 0 because no requests are made yet
mRecordsToLoad = 0;
mCi.setOnSmsOnSim(this, EVENT_SMS_ON_SIM, null);
mCi.registerForIccRefresh(this, EVENT_SIM_REFRESH, null);
// Start off by setting empty state
resetRecords();
//2. 读取 SIM卡的所有重要的记录信息
mParentApp.registerForReady(this, EVENT_APP_READY, null);
if (DBG) log("SIMRecords X ctor this=" + this);
}
这个过程包含两个重要的步骤
创建AdnRecordCache,用于保存电话本数据，根据EF的ID，可以分别读取SIM卡和USIM卡的电话本数据。AdnRecordCache 中持有一个UsimPhoneBookManager，它就是用来读取USIM卡电话本数据的。GSM的SIM卡和WCDMA的USIM卡都是对应的 SimRecords.
读取SIM卡的所有重要记录信息，在fetchSimRecords 方法中实现。
protected void fetchSimRecords() {
mRecordsRequested = true;
if (DBG) log("fetchSimRecords " + mRecordsToLoad);
mCi.getIMSIForApp(mParentApp.getAid(), obtainMessage(EVENT_GET_IMSI_DONE));
mRecordsToLoad++;
mFh.loadEFTransparent(EF_ICCID, obtainMessage(EVENT_GET_ICCID_DONE));
mRecordsToLoad++;
// FIXME should examine EF[MSISDN]'s capability configuration
// to determine which is the voice/data/fax line
new AdnRecordLoader(mFh).loadFromEF(EF_MSISDN, EF_EXT1, 1,
obtainMessage(EVENT_GET_MSISDN_DONE));
mRecordsToLoad++;
// Record number is subscriber profile
mFh.loadEFLinearFixed(EF_MBI, 1, obtainMessage(EVENT_GET_MBI_DONE));
mRecordsToLoad++;
mFh.loadEFTransparent(EF_AD, obtainMessage(EVENT_GET_AD_DONE));
mRecordsToLoad++;
// Record number is subscriber profile
mFh.loadEFLinearFixed(EF_MWIS, 1, obtainMessage(EVENT_GET_MWIS_DONE));
mRecordsToLoad++;
// Also load CPHS-style voice mail indicator, which stores
// the same info as EF[MWIS]. If both exist, both are updated
// but the EF[MWIS] data is preferred
// Please note this must be loaded after EF[MWIS]
mFh.loadEFTransparent(
EF_VOICE_MAIL_INDICATOR_CPHS,
obtainMessage(EVENT_GET_VOICE_MAIL_INDICATOR_CPHS_DONE));
mRecordsToLoad++;
// Same goes for Call Forward Status indicator: fetch both
// EF[CFIS] and CPHS-EF, with EF[CFIS] preferred.
mFh.loadEFLinearFixed(EF_CFIS, 1, obtainMessage(EVENT_GET_CFIS_DONE));
mRecordsToLoad++;
mFh.loadEFTransparent(EF_CFF_CPHS, obtainMessage(EVENT_GET_CFF_DONE));
mRecordsToLoad++;
getSpnFsm(true, null);
mFh.loadEFTransparent(EF_SPDI, obtainMessage(EVENT_GET_SPDI_DONE));
mRecordsToLoad++;
mFh.loadEFLinearFixed(EF_PNN, 1, obtainMessage(EVENT_GET_PNN_DONE));
mRecordsToLoad++;
mFh.loadEFTransparent(EF_SST, obtainMessage(EVENT_GET_SST_DONE));
mRecordsToLoad++;
mFh.loadEFTransparent(EF_INFO_CPHS, obtainMessage(EVENT_GET_INFO_CPHS_DONE));
mRecordsToLoad++;
mFh.loadEFTransparent(EF_CSP_CPHS,obtainMessage(EVENT_GET_CSP_CPHS_DONE));
mRecordsToLoad++;
mFh.loadEFTransparent(EF_GID1, obtainMessage(EVENT_GET_GID1_DONE));
mRecordsToLoad++;
// XXX should seek instead of examining them all
if (false) { // XXX
mFh.loadEFLinearFixedAll(EF_SMS, obtainMessage(EVENT_GET_ALL_SMS_DONE));
mRecordsToLoad++;
}
if (CRASH_RIL) {
String sms = "0107912160130310f20404d0110041007030208054832b0120"
+ "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
+ "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
+ "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
+ "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
+ "ffffffffffffffffffffffffffffff";
byte[] ba = IccUtils.hexStringToBytes(sms);
mFh.updateEFLinearFixed(EF_SMS, 1, ba, null,
obtainMessage(EVENT_MARK_SMS_READ_DONE, 1));
}
if (DBG) log("fetchSimRecords " + mRecordsToLoad + " requested: " + mRecordsRequested);
}
总的来说，创建 SimRecords 的过程就是读取并且保存SIM卡重要信息的过程。其中，电话本的信息保存在 mAdnCache 中，其他信息保存在 SimRecords 中，但是在Phone对象完成初始化后，mAdnCache 里是空的，也就是说，在IccRecords 初始化的过程中，AdnRecordCache 并没有主动去请求SIM卡联系人的数据。
所有的IccRecords 是通过 IccFileHandler 向Modem 发命令读取数据的。他们之间的交互图如下
3.通知UiccController 的监听者，与UiccCardApplication的相关信息可以更新了。根据分析源代码，我们可以看到，PhoneBase ,ServiceStateTracker,IccCardProxy,DcTrackerBase，这些类是 UiccController 的监听者。他们都会处理UiccController 的变化。我们可以这么理解，这些类是SIM卡状态发生变化后，第二批处理SIM卡状态变化的实体。第一个处理SIM卡状态变化的是 UiccController.
希望本文所述对大家Android程序设计有所帮助。
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