Android 4.4Telephony流程分析SIM卡开机时的数据加载

本文代码以MTK平台Android 4.4为分析对象，与Google原生AOSP有些许差异，请读者知悉。

本文主要介绍sim卡数据的读取过程，当射频状态处于准备状态时，此时UiccCardApplication应处于AppState.APPSTATE_READY状态，我们沿着这个信号跟踪下去。阅读本文时可先阅读Android4.4 Telephony流程分析——SIM卡开机时的初始化一文，了解Radio和sim卡状态更新过程。

先来看一下数据加载的序列图：

step1~step3，走的是更新过程，创建过程参考Android4.4 Telephony流程分析——SIM卡开机时的初始化一文step21之后的步骤。

step4，通过Modem查询sim卡的FDN(固定拨号)数据。

step5，通过Modem查询sim卡的pin1状态。

step6~step7，将pin1状态通知出去，IccCardProxy会注册mPinLockedRegistrants。

step8~step9，将sim卡ready状态发出去。

 

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01.private void notifyReadyRegistrantsIfNeeded(Registrant r) {

02.if (mDestroyed) {

03.return;

04.}

05.if (mAppState == AppState.APPSTATE_READY) {

06.if (mPin1State == PinState.PINSTATE_ENABLED_NOT_VERIFIED ||

07.mPin1State == PinState.PINSTATE_ENABLED_BLOCKED ||

08.mPin1State == PinState.PINSTATE_ENABLED_PERM_BLOCKED) {

09.loge("Sanity check failed! APPSTATE is ready while PIN1 is not verified!!!");

10.// Don't notify if application is in insane state

11.return;

12.}

13.if (r == null) {

14.if (DBG) log("Notifying registrants: READY");

15.mReadyRegistrants.notifyRegistrants();

16.} else {

17.if (DBG) log("Notifying 1 registrant: READY");

18.r.notifyRegistrant(new AsyncResult(null, null, null));

19.}

20.}

21.}

如果此时pin1是被激活的，也就是sim卡开启了pin1锁，sim卡ready状态就不会发出去。

 

监听mReadyRegistrants状态变化的对象很多，主要有:SIMRecords（同类的还有RuimRecords、IsimUiccRecords），IccCardProxy（会将SIM卡状态广播出去），GsmServiceStateTracker（会根据SIM状态去注册网络），这里主要说一下SIMRecords，读取SIM的数据。

step12，fetchSimRecords()方法:

 

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001.//MTK-END [mtk80601][111215][ALPS00093395]

002.protected void fetchSimRecords() {

003.mRecordsRequested = true;

004. 

005.if (DBG) log("fetchSimRecords " + mRecordsToLoad);

006. 

007.mCi.getIMSIForApp(mParentApp.getAid(), obtainMessage(EVENT_GET_IMSI_DONE));//读IMSI

008.mRecordsToLoad++;

009. 

010.//iccFh.loadEFTransparent(EF_ICCID, obtainMessage(EVENT_GET_ICCID_DONE));

011.//mRecordsToLoad++;

012. 

013.// FIXME should examine EF[MSISDN]'s capability configuration

014.// to determine which is the voice/data/fax line

015.//new AdnRecordLoader(phone).loadFromEF(EF_MSISDN, EF_EXT1, 1,

016.//obtainMessage(EVENT_GET_MSISDN_DONE));

017.//recordsToLoad++;

018. 

019.// Record number is subscriber profile

020.mFh.loadEFLinearFixed(EF_MBI, 1, obtainMessage(EVENT_GET_MBI_DONE));

021.mRecordsToLoad++;

022. 

023.mFh.loadEFTransparent(EF_AD, obtainMessage(EVENT_GET_AD_DONE));

024.mRecordsToLoad++;

025. 

026.// Record number is subscriber profile

027.mFh.loadEFLinearFixed(EF_MWIS, 1, obtainMessage(EVENT_GET_MWIS_DONE));

028.mRecordsToLoad++;

029. 

030. 

031.// Also load CPHS-style voice mail indicator, which stores

032.// the same info as EF[MWIS]. If both exist, both are updated

033.// but the EF[MWIS] data is preferred

034.// Please note this must be loaded after EF[MWIS]

035.mFh.loadEFTransparent(

036.EF_VOICE_MAIL_INDICATOR_CPHS,

037.obtainMessage(EVENT_GET_VOICE_MAIL_INDICATOR_CPHS_DONE));

038.mRecordsToLoad++;

039. 

040.// Same goes for Call Forward Status indicator: fetch both

041.// EF[CFIS] and CPHS-EF, with EF[CFIS] preferred.

042.mFh.loadEFLinearFixed(EF_CFIS, 1, obtainMessage(EVENT_GET_CFIS_DONE));

043.mRecordsToLoad++;

044.mFh.loadEFTransparent(EF_CFF_CPHS, obtainMessage(EVENT_GET_CFF_DONE));

045.mRecordsToLoad++;

046. 

047. 

048.//getSpnFsm(true, null);

049. 

050.mFh.loadEFTransparent(EF_SPDI, obtainMessage(EVENT_GET_SPDI_DONE));

051.mRecordsToLoad++;

052. 

053.//mFh.loadEFLinearFixed(EF_PNN, 1, obtainMessage(EVENT_GET_PNN_DONE));

054.//recordsToLoad++;

055. 

056.mFh.loadEFTransparent(EF_SST, obtainMessage(EVENT_GET_SST_DONE));

057.mRecordsToLoad++;

058. 

059.mFh.loadEFTransparent(EF_INFO_CPHS, obtainMessage(EVENT_GET_INFO_CPHS_DONE));

060.mRecordsToLoad++;

061. 

062.mFh.loadEFTransparent(EF_CSP_CPHS,obtainMessage(EVENT_GET_CSP_CPHS_DONE));

063.mRecordsToLoad++;

064. 

065.mFh.loadEFTransparent(EF_GID1, obtainMessage(EVENT_GET_GID1_DONE));

066.mRecordsToLoad++;

067. 

068./*

069.Detail description:

070.This feature provides a interface to get menu title string from EF_SUME

071.*/

072.if (mTelephonyExt != null) {

073.if (mTelephonyExt.isSetLanguageBySIM()) {

074.mFh.loadEFTransparent(EF_SUME, obtainMessage(EVENT_QUERY_MENU_TITLE_DONE));

075.mRecordsToLoad++;

076.}

077.} else {

078.loge("fetchSimRecords(): mTelephonyExt is null!!!");

079.}

080. 

081.fetchCPHSOns();

082. 

083.// XXX should seek instead of examining them all

084.if (false) { // XXX

085.mFh.loadEFLinearFixedAll(EF_SMS, obtainMessage(EVENT_GET_ALL_SMS_DONE));

086.mRecordsToLoad++;

087.}

088. 

089.if (CRASH_RIL) {

090.String sms = "0107912160130310f20404d0110041007030208054832b0120"

091.+ "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"

092.+ "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"

093.+ "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"

094.+ "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"

095.+ "ffffffffffffffffffffffffffffff";

096.byte[] ba = IccUtils.hexStringToBytes(sms);

097. 

098.mFh.updateEFLinearFixed(EF_SMS, 1, ba, null,

099.obtainMessage(EVENT_MARK_SMS_READ_DONE, 1));

100.}

101.if (DBG) log("fetchSimRecords " + mRecordsToLoad + " requested: " + mRecordsRequested);

102./*

103.* Here, we assume that PHB is ready and try to read the entries.

104.* If it is not, we will receive the event EVENT_PHB_READY later.

105.* Then, we will ready the PHB entries again.

106.*/

107.fetchPhbRecords();//读adn联系人

108. 

109.fetchRatBalancing();

110.}

读SIM卡是要通过Modem的，上层读Modem就得通过RIL，我们以读ADN联系人fetchPhbRecords()为例，来看看读取过程step13~step22，主要是通过IccFileHandler实现，先请求adn的长度(step16~step19)，然后再请求具体的adn联系人数据step20~step22，这个过程就是与Modem交互的过程，读者可以先了解一下SIM卡的文件结构，才能更好的理解为什么这样读，我也不甚熟悉。

 

step23，获取SIM卡内置的紧急号码，这个是由运营商定制的。

step24~step26，当需要load的数据都load完成，才会执行，再在onAllRecordsLoaded中发布mRecordsLoadedRegistrants通知。

 

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01.protected void onRecordLoaded() {

02.// One record loaded successfully or failed, In either case

03.// we need to update the recordsToLoad count

04.mRecordsToLoad -= 1;

05.if (DBG) log("onRecordLoaded " + mRecordsToLoad + " requested: " + mRecordsRequested);

06. 

07.if (mRecordsToLoad == 0 && mRecordsRequested == true) {

08.onAllRecordsLoaded();

09.} else if (mRecordsToLoad < 0) {

10.loge("recordsToLoad <0, programmer error suspected");

11.mRecordsToLoad = 0;

12.}

13.}

step27之后的步骤，都是对mRecordsLoadedRegistrants侦听的响应，IccCardProxy侦听到后，会发广播给外界:

 

 

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01.private void broadcastIccStateChangedIntent(String value, String reason) {

02.synchronized (mLock) {

03.if (mQuietMode) {

04.log("QuietMode: NOT Broadcasting intent ACTION_SIM_STATE_CHANGED " +  value

05.+ " reason " + reason);

06.return;

07.}

08. 

09.Intent intent = new Intent(TelephonyIntents.ACTION_SIM_STATE_CHANGED);

10.//intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);

11.intent.putExtra(PhoneConstants.PHONE_NAME_KEY, "Phone");

12.intent.putExtra(IccCardConstants.INTENT_KEY_ICC_STATE, value);

13.intent.putExtra(IccCardConstants.INTENT_KEY_LOCKED_REASON, reason);

14.intent.putExtra(PhoneConstants.GEMINI_SIM_ID_KEY, mSimId);

15.if (DBG) log("Broadcasting intent ACTION_SIM_STATE_CHANGED " +  value

16.+ " reason " + reason + " sim id " + mSimId);

17.ActivityManagerNative.broadcastStickyIntent(intent, READ_PHONE_STATE,

18.UserHandle.USER_ALL);

19.}

20.}

21. 

22.public void broadcastIccStateChangedExtendIntent(String value, String reason) {

23.synchronized (mLock) {

24.if (mQuietMode) {

25.log("QuietMode: NOT Broadcasting extend intent ACTION_SIM_STATE_CHANGED " +  value

26.+ " reason " + reason);

27.return;

28.}

29. 

30.Intent intent = new Intent(TelephonyIntents.ACTION_SIM_STATE_CHANGED_EXTEND);

31.//intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);

32.intent.putExtra(PhoneConstants.PHONE_NAME_KEY, "Phone");

33.intent.putExtra(IccCardConstants.INTENT_KEY_ICC_STATE, value);

34.intent.putExtra(IccCardConstants.INTENT_KEY_LOCKED_REASON, reason);

35.intent.putExtra(PhoneConstants.GEMINI_SIM_ID_KEY, mSimId);

36.if (DBG) log("Broadcasting intent ACTION_SIM_STATE_CHANGED_EXTEND " +  value

37.+ " reason " + reason + " sim id " + mSimId);

38.ActivityManagerNative.broadcastStickyIntent(intent, READ_PHONE_STATE,

39.UserHandle.USER_ALL);

40.}

41.}