GSMPhone與CDMAPhone切換過程
Phone創建過程
Phone APP開機啟動，會去創建Phone：
public static void makeDefaultPhone(Context context) { // Get preferred network mode 根據網絡設置， // 否則默認PREFERRED_NETWORK_MODE 為= NETWORK_MODE_WCDMA_PREF; int preferredNetworkMode = RILConstants.PREFERRED_NETWORK_MODE; if (BaseCommands.getLteOnCdmaModeStatic() == Phone.LTE_ON_CDMA_TRUE) { preferredNetworkMode = Phone.NT_MODE_GLOBAL; } //從數據庫中查詢設置preferred network mode int networkMode = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.PREFERRED_NETWORK_MODE, preferredNetworkMode); //創建RIL，將會設置Modem的preferred network mode sCommandsInterface = new RIL(context, networkMode, cdmaSubscription); //若沒有設置preferred network mode 或者設置pref WCDMA 則create GSMPhone int phoneType = getPhoneType(networkMode); if (phoneType == Phone.PHONE_TYPE_GSM) { //create GSMPhone sProxyPhone = new PhoneProxy(new GSMPhone(context, sCommandsInterface, sPhoneNotifier)); } else if (phoneType == Phone.PHONE_TYPE_CDMA) { //create CDMAPhone Or CDMALTEPhone } …… }
Phone是在開機就啟動的，創建具體Phone是GSMPhone還是CDMAPhone，
這個創建過程，跟插入的卡類型無關，跟設置preferred network mode有關；
但是在具體使用中，假如插入UIM卡，顯然是不行，肯定存在着GSMPhone向CDMAPhone切換的過程；或者相反的切換過程，看看此過程是如何進行的。
PhoneProxy狀態處理
創建的Phone使用PhoneProxy代理的，PhoneProxy是個handler，實現Phone接口
PhoneProxy構造過程
public PhoneProxy(PhoneBase phone) { mActivePhone = phone; mCommandsInterface = ((PhoneBase)mActivePhone).mCM; //監聽modem傳遞過來的一些消息 mCommandsInterface.registerForRilConnected(this, EVENT_RIL_CONNECTED, null); mCommandsInterface.registerForOn(this, EVENT_RADIO_ON, null); mCommandsInterface.registerForVoiceRadioTechChanged( this, EVENT_VOICE_RADIO_TECH_CHANGED, null); …… }
PhoneProxy里面監聽了modem傳遞過來的一些，看看這些消息都具體干了些什么。
public void handleMessage(Message msg) { AsyncResult ar = (AsyncResult) msg.obj; logd(" msg.what = " + msg.what); switch(msg.what) { case EVENT_RADIO_ON: mVoiceTechQueryContext++; mCommandsInterface.getVoiceRadioTechnology( obtainMessage(EVENT_REQUEST_VOICE_RADIO_TECH_DONE, mVoiceTechQueryContext)); break; case EVENT_VOICE_RADIO_TECH_CHANGED: mVoiceTechQueryContext++; mCommandsInterface.getVoiceRadioTechnology( obtainMessage(EVENT_REQUEST_VOICE_RADIO_TECH_DONE, mVoiceTechQueryContext)); break; case EVENT_REQUEST_VOICE_RADIO_TECH_DONE: updatePhoneObject(newVoiceTech); break; …… } }
注冊了EVENT_RADIO_ON與EVENT_VOICE_RADIO_TECH_CHANGED
當收到這兩個消息的時候，都調用了RIL的getVoiceRadioTechnology，獲取當前注冊網絡使用技術；
具體是哪一個消息新創建Phone，通過Log看到是Modem傳遞過來的EVENT_VOICE_RADIO_TECH_CHANGED消息；
完了之后會將消息EVENT_REQUEST_VOICE_RADIO_TECH_DONE傳遞給PhoneProxy，
調用updatePhoneObject，更新Phone.
GSM 與CDMA切換過程
public void updatePhoneObject(int newVoiceRadioTech) { //一堆判斷是否當前Phone與當前網絡技術相匹配 //當前創建的Phone與網絡技術不匹配，重新創建Phone deleteAndCreatePhone(newVoiceRadioTech); } private void deleteAndCreatePhone(int newVoiceRadioTech) { String outgoingPhoneName = "Unknown"; Phone oldPhone = mActivePhone; //打印從GSM——》CDMA Or CDMA——》GSM outgoingPhoneName = ((PhoneBase) oldPhone).getPhoneName(); logd("Switching Voice Phone : " + outgoingPhoneName + " >>> " + (ServiceState.isGsm(newVoiceRadioTech) ? "GSM" : "CDMA")); //oldPhone Unregister oldPhone.dispose(); //創建新Phone createNewPhone(newVoiceRadioTech); } protected void createNewPhone(int newVoiceRadioTech) { if (ServiceState.isCdma(newVoiceRadioTech)) { mActivePhone = PhoneFactory.getCdmaPhone(); } else if (ServiceState.isGsm(newVoiceRadioTech)) { mActivePhone = PhoneFactory.getGsmPhone(); } }
通過當前設置Modem的preferred network mode與當前注冊網絡技術，進行比較，不匹配通知上層，進行查詢更新。