Android 7.0 UICC 分析(四)

本文讲解SIMRecords

/frameworks/opt/telephony/src/java/com/android/internal/telephony/uicc/SIMRecords.java

构造方法：

    public SIMRecords(UiccCardApplication app, Context c, CommandsInterface ci) {
        super(app, c, ci);
        mAdnCache = new AdnRecordCache(mFh);
        mVmConfig = new VoiceMailConstants();
        mSpnOverride = new SpnOverride();

        mCi.setOnSmsOnSim(this, EVENT_SMS_ON_SIM, null);//消息注册，当Ci接收到EVENT_SMS_ON_SIM消息通知SIMRecords
        mCi.registerForIccRefresh(this, EVENT_SIM_REFRESH, null);

        // Start off by setting empty state
        resetRecords();
        mParentApp.registerForReady(this, EVENT_APP_READY, null);//当卡准备好，UiccCardApplication会通过notifyReadyRegistrantsifNeeded()通知SIMRecords
        mParentApp.registerForLocked(this, EVENT_APP_LOCKED, null);//EVENT_APP_LOCKED消息同样处理
        if (DBG) log("SIMRecords X ctor this=" + this);

        IntentFilter intentfilter = new IntentFilter();
        intentfilter.addAction(CarrierConfigManager.ACTION_CARRIER_CONFIG_CHANGED);
        c.registerReceiver(mReceiver, intentfilter); //接收ACTION_CARRIER_CONFIG_CHANGED消息的处理
    }

接收UiccCardApplication 的通知，消息EVENT_APP_READY、EVENT_APP_LOCKED 的处理：

        try { switch (msg.what) {
            case EVENT_APP_READY:
                onReady();
                break;

            case EVENT_APP_LOCKED:
                onLocked();
                break;
            }

onReady() 方法，直接调用fetchSimRecords()，到这里开始加载EF文件信息:

具体的读取SIM卡EF文件信息的过程是有IccFileHandler来实现的，根据EF文件的类型，调用不同的方法loadEFTransparent()和loadEFLinearFixed()，最终都会调用RILJ 的iccIOForApp() 方法；

    protected void fetchSimRecords() {
        if (DBG) log("fetchSimRecords " + mRecordsToLoad);

        mCi.getIMSIForApp(mParentApp.getAid(), obtainMessage(EVENT_GET_IMSI_DONE));//获取IMSI信息，返回的数据在该类handleMessage()中处理
        mRecordsToLoad++;　　//没读取一项信息，计数值就加1
        mFh.loadEFTransparent(EF_ICCID, obtainMessage(EVENT_GET_ICCID_DONE));//获取ICCID
        mRecordsToLoad++;

        // Same goes for Call Forward Status indicator: fetch both
        // EF[CFIS] and CPHS-EF, with EF[CFIS] preferred.
        loadCallForwardingRecords();
        getSpnFsm(true, null);
        loadEfLiAndEfPl();

        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);
    }

 loadEFTransparent() 方法：

    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);
    }

消息EVENT_GET_IMSI_DONE、EVNET_GET_ICCID_DONE在handleMessage() 中处理，解析出IMSI、ICCID值:

            /* IO events */
            case EVENT_GET_IMSI_DONE:
                isRecordLoadResponse = true;

                ar = (AsyncResult)msg.obj;

                mImsi = (String) ar.result;//获取MCC、MNC、MSIN
                // IMSI (MCC+MNC+MSIN) is at least 6 digits, but not more
                // than 15 (and usually 15).
                if (mImsi != null && (mImsi.length() < 6 || mImsi.length() > 15)) {
                    loge("invalid IMSI " + mImsi);
                    mImsi = null;
                }

                log("IMSI: mMncLength=" + mMncLength);
                log("IMSI: " + mImsi.substring(0, 6) + "xxxxxxx");
                .........
                mImsiReadyRegistrants.notifyRegistrants();
            break;

            case EVENT_GET_ICCID_DONE:
                isRecordLoadResponse = true;

                ar = (AsyncResult)msg.obj;
                data = (byte[])ar.result;
                mIccId = IccUtils.bcdToString(data, 0, data.length);//转换BCD码
                mFullIccId = IccUtils.bchToString(data, 0, data.length);

                log("iccid: " + SubscriptionInfo.givePrintableIccid(mFullIccId));
            break;

handleMessage() 方法解析数据后，调用onRecordLoaded()方法，mRecordsToLoad减1:

    protected void onRecordLoaded() {
        // One record loaded successfully or failed, In either case
        // we need to update the recordsToLoad count
        mRecordsToLoad -= 1;//SIM数据读取成功一次，该参数就减1
        if (DBG) log("onRecordLoaded " + mRecordsToLoad + " requested: " + mRecordsRequested);

        if (mRecordsToLoad == 0 && mRecordsRequested == true) {//mRecordsToLoad值为0，代表fetchSimRecords()中启动加载的数据都已异步读取完成
            onAllRecordsLoaded();
        } else if (mRecordsToLoad < 0) {
            loge("recordsToLoad <0, programmer error suspected");
            mRecordsToLoad = 0;
        }
    }

mRecordsToLoad 值为0，进入onAllRecordsLoaded() 方法，对读取的数据进行处理与存储：

    protected void onAllRecordsLoaded() {
        if (DBG) log("record load complete");

        Resources resource = Resources.getSystem();
        if (resource.getBoolean(com.android.internal.R.bool.config_use_sim_language_file)) {
            setSimLanguage(mEfLi, mEfPl);
        } else {
            if (DBG) log ("Not using EF LI/EF PL");
        }

        setVoiceCallForwardingFlagFromSimRecords();

        if (mParentApp.getState() == AppState.APPSTATE_PIN ||
               mParentApp.getState() == AppState.APPSTATE_PUK) {
            // reset recordsRequested, since sim is not loaded really
            mRecordsRequested = false;
            // lock state, only update language
            return ;
        }

        // Some fields require more than one SIM record to set

        String operator = getOperatorNumeric();
        if (!TextUtils.isEmpty(operator)) {
            log("onAllRecordsLoaded set 'gsm.sim.operator.numeric' to operator='" +
                    operator + "'");
            log("update icc_operator_numeric=" + operator);
            mTelephonyManager.setSimOperatorNumericForPhone(
                    mParentApp.getPhoneId(), operator);
            final SubscriptionController subController = SubscriptionController.getInstance();
            subController.setMccMnc(operator, subController.getDefaultSubId());
        } else {
            log("onAllRecordsLoaded empty 'gsm.sim.operator.numeric' skipping");
        }

        if (!TextUtils.isEmpty(mImsi)) {
            log("onAllRecordsLoaded set mcc imsi" + (VDBG ? ("=" + mImsi) : ""));
            mTelephonyManager.setSimCountryIsoForPhone(
                    mParentApp.getPhoneId(), MccTable.countryCodeForMcc(
                    Integer.parseInt(mImsi.substring(0,3))));
        } else {
            log("onAllRecordsLoaded empty imsi skipping setting mcc");
        }

        setVoiceMailByCountry(operator);

        mRecordsLoadedRegistrants.notifyRegistrants(
            new AsyncResult(null, null, null));
    }

到此sim卡初始化基本流程就结束了。