Android系统分析之运营商显示流程分析之运营商信息的获取和赋值一

运营商显示流程分析之运营商信息的获取和赋值

一. SIM卡运营商和网络运营商

SIM卡运营商即SPN, 网络运营商即PLMN, 首先我们需要知道SIM卡运营商和网络运营商的获取方式, 如下:

private TelephonyManager mTelephonyManager; mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); // 获取SIM卡运营商名称及SIM卡运营商代码(MCCMNC码) String simOperator = mTelephonyManager.getSimOperator(); String networkOperator = mTelephonyManager.getNetworkOperator(); // 获取网络运营商名称及网络运营商代码(MCCMNC码) String simOperatorName = mTelephonyManager.getSimOperatorName(); String networkOperatorName = mTelephonyManager.getNetworkOperatorName();

二. 获取SIM卡和网络运营商信息的具体实现

我们通过TelephonyManager获取的SIM卡和网络运营商的相关信息, 因此首先我们到TelephonyManager中查看实现方式:

/** * Returns the MCC+MNC (mobile country code + mobile network code) of the * provider of the SIM. 5 or 6 decimal digits. * <p> * Availability: SIM state must be {@link #SIM_STATE_READY} * * @see #getSimState */ public String getSimOperator() { return SystemProperties.get(TelephonyProperties.PROPERTY_ICC_OPERATOR_NUMERIC); } /** * Returns the Service Provider Name (SPN). * <p> * Availability: SIM state must be {@link #SIM_STATE_READY} * * @see #getSimState */ public String getSimOperatorName() { return SystemProperties.get(TelephonyProperties.PROPERTY_ICC_OPERATOR_ALPHA); } /** * Returns the alphabetic name of current registered operator. * <p> * Availability: Only when user is registered to a network. Result may be * unreliable on CDMA networks (use {@link #getPhoneType()} to determine if * on a CDMA network). */ public String getNetworkOperatorName() { return SystemProperties.get(TelephonyProperties.PROPERTY_OPERATOR_ALPHA); } /** * Returns the numeric name (MCC+MNC) of current registered operator. * <p> * Availability: Only when user is registered to a network. Result may be * unreliable on CDMA networks (use {@link #getPhoneType()} to determine if * on a CDMA network). */ public String getNetworkOperator() { return SystemProperties.get(TelephonyProperties.PROPERTY_OPERATOR_NUMERIC); }

通过上面的TelephonyManager的源码我们可以发现, SIM卡和网络运营商的信息是通过获取系统的属性得到的, 因此我们只需要查询到上面的属性是在何处被赋值的, 就可以知道该信息的来源

需要查询的属性如下:

TelephonyProperties.PROPERTY_ICC_OPERATOR_NUMERIC, TelephonyProperties.PROPERTY_ICC_OPERATOR_ALPHA, TelephonyProperties.PROPERTY_OPERATOR_ALPHA, TelephonyProperties.PROPERTY_OPERATOR_NUMERIC

通过全局搜索, 可以发现TelephonyProperties.PROPERTY_ICC_OPERATOR_NUMERIC和TelephonyProperties.PROPERTY_ICC_OPERATOR_ALPHA是在SIMRecords中被赋值的

/** * Finite State Machine to load Service Provider Name , which can be stored * in either EF_SPN (3GPP), EF_SPN_CPHS, or EF_SPN_SHORT_CPHS (CPHS4.2) * * After starting, FSM will search SPN EFs in order and stop after finding * the first valid SPN * * If the FSM gets restart while waiting for one of * SPN EFs results (i.e. a SIM refresh occurs after issuing * read EF_CPHS_SPN), it will re-initialize only after * receiving and discarding the unfinished SPN EF result. * * @param start set true only for initialize loading * @param ar the AsyncResult from loadEFTransparent * ar.exception holds exception in error * ar.result is byte[] for data in success */ private void getSpnFsm(boolean start, AsyncResult ar) { ... switch(mSpnState){ ... case READ_SPN_3GPP: if (ar != null && ar.exception == null) { data = (byte[]) ar.result; mSpnDisplayCondition = 0xff & data[0]; mSpn = IccUtils.adnStringFieldToString(data, 1, data.length - 1); ... // 设置SIM卡运营商名称 SystemProperties.set(PROPERTY_ICC_OPERATOR_ALPHA, mSpn); mSpnState = GetSpnFsmState.IDLE; } else { ... } break; case READ_SPN_CPHS: if (ar != null && ar.exception == null) { data = (byte[]) ar.result; mSpn = IccUtils.adnStringFieldToString(data, 0, data.length); ... // 设置SIM卡运营商名称 SystemProperties.set(PROPERTY_ICC_OPERATOR_ALPHA, mSpn); mSpnState = GetSpnFsmState.IDLE; } else { ... } break; case READ_SPN_SHORT_CPHS: if (ar != null && ar.exception == null) { data = (byte[]) ar.result; mSpn = IccUtils.adnStringFieldToString(data, 0, data.length); ... // 设置SIM卡运营商名称 SystemProperties.set(PROPERTY_ICC_OPERATOR_ALPHA, mSpn); }else { ... } ... } } @Override protected void onAllRecordsLoaded() { ... String operator = getOperatorNumeric(); if (!TextUtils.isEmpty(operator)) { ... // 设置运营商代码 SystemProperties.set(PROPERTY_ICC_OPERATOR_NUMERIC, operator); } else { log("onAllRecordsLoaded empty 'gsm.sim.operator.numeric' skipping"); } ... }

TelephonyProperties.PROPERTY_OPERATOR_ALPHA和TelephonyProperties.PROPERTY_OPERATOR_NUMERIC是在GsmServiceStateTracker中赋值的

private void pollStateDone() { ... if (hasChanged) { String operatorNumeric; updateSpnDisplay(); // 设置网络运营商名称 mPhone.setSystemProperty(TelephonyProperties.PROPERTY_OPERATOR_ALPHA, mSS.getOperatorAlphaLong()); String prevOperatorNumeric = SystemProperties.get(TelephonyProperties.PROPERTY_OPERATOR_NUMERIC, ""); operatorNumeric = mSS.getOperatorNumeric(); // 设置网络运营商代码 mPhone.setSystemProperty(TelephonyProperties.PROPERTY_OPERATOR_NUMERIC, operatorNumeric); // 更新配置 updateCarrierMccMncConfiguration(operatorNumeric, prevOperatorNumeric, mPhone.getContext()); ... // 是否是漫游 mPhone.setSystemProperty(TelephonyProperties.PROPERTY_OPERATOR_ISROAMING, mSS.getRoaming() ? "true" : "false"); mPhone.notifyServiceStateChanged(mSS); } ... }

通过上面的步骤, 我们已经知道SIM卡和运营商信息的获取及是在何处被赋值, 接下来分析SIM卡运营商信息的读取和显示流程

转载于:https://www.cnblogs.com/firmly-believe/p/10764381.html