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
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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
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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
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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
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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。
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//创建 UiccCardApplicationUiccCardApplication(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。
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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。
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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。
