kaifyou Android 7.0 UICC 分析

Posted 2020-08-23 kaifyou

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);
    }