Android4.X中SIM卡信息初始化过程详解

2020-04-11 11:20:40

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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 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。

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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