GSMPhone与CDMAPhone切换过程

 

Phone创建过程

　　Phone APP开机启动，会去创建Phone：

public static void makeDefaultPhone(Context context) {    // Get preferred network mode 根据网络设置，    // 否则默认PREFERRED_NETWORK_MODE 为= NETWORK_MODE_WCDMA_PREF;    int preferredNetworkMode = RILConstants.PREFERRED_NETWORK_MODE;    if (BaseCommands.getLteOnCdmaModeStatic() == Phone.LTE_ON_CDMA_TRUE) {        preferredNetworkMode = Phone.NT_MODE_GLOBAL;    }        //从数据库中查询设置preferred network mode    int networkMode = Settings.Secure.getInt(context.getContentResolver(),            Settings.Secure.PREFERRED_NETWORK_MODE, preferredNetworkMode);    //创建RIL，将会设置Modem的preferred network mode　　sCommandsInterface = new RIL(context, networkMode, cdmaSubscription);    //若没有设置preferred network mode 或者设置pref WCDMA 则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是在开机就启动的，创建具体Phone是GSMPhone还是CDMAPhone，

这个创建过程，跟插入的卡类型无关，跟设置preferred network mode有关；

但是在具体使用中，假如插入UIM卡，显然是不行，肯定存在着GSMPhone向CDMAPhone切换的过程；或者相反的切换过程，看看此过程是如何进行的。

 

PhoneProxy状态处理

创建的Phone使用PhoneProxy代理的，PhoneProxy是个handler，实现Phone接口

 

PhoneProxy构造过程

　　

public PhoneProxy(PhoneBase phone) {    mActivePhone = phone;    mCommandsInterface = ((PhoneBase)mActivePhone).mCM;                //监听modem传递过来的一些消息    mCommandsInterface.registerForRilConnected(this, EVENT_RIL_CONNECTED, null);    mCommandsInterface.registerForOn(this, EVENT_RADIO_ON, null);    mCommandsInterface.registerForVoiceRadioTechChanged(                         this, EVENT_VOICE_RADIO_TECH_CHANGED, null);    ……}

 

PhoneProxy里面监听了modem传递过来的一些，看看这些消息都具体干了些什么。

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;        ……    }}

 

　　注册了EVENT_RADIO_ON与EVENT_VOICE_RADIO_TECH_CHANGED

当收到这两个消息的时候，都调用了RIL的getVoiceRadioTechnology，获取当前注册网络使用技术；

具体是哪一个消息新创建Phone，通过Log看到是Modem传递过来的EVENT_VOICE_RADIO_TECH_CHANGED消息；

完了之后会将消息EVENT_REQUEST_VOICE_RADIO_TECH_DONE传递给PhoneProxy，

调用updatePhoneObject，更新Phone.

 

GSM 与CDMA切换过程

public void updatePhoneObject(int newVoiceRadioTech) {        //一堆判断是否当前Phone与当前网络技术相匹配                //当前创建的Phone与网络技术不匹配，重新创建Phone        deleteAndCreatePhone(newVoiceRadioTech);}private void deleteAndCreatePhone(int newVoiceRadioTech) {        String outgoingPhoneName = "Unknown";        Phone oldPhone = mActivePhone;                //打印从GSM——》CDMA Or CDMA——》GSM        outgoingPhoneName = ((PhoneBase) oldPhone).getPhoneName();        logd("Switching Voice Phone : " + outgoingPhoneName + " >>> "              + (ServiceState.isGsm(newVoiceRadioTech) ? "GSM" : "CDMA"));                //oldPhone Unregister              oldPhone.dispose();                      //创建新Phone        createNewPhone(newVoiceRadioTech);}protected void createNewPhone(int newVoiceRadioTech) {    if (ServiceState.isCdma(newVoiceRadioTech)) {        mActivePhone = PhoneFactory.getCdmaPhone();    } else if (ServiceState.isGsm(newVoiceRadioTech)) {        mActivePhone = PhoneFactory.getGsmPhone();    }}

 

通过当前设置Modem的preferred network mode与当前注册网络技术，进行比较，不匹配通知上层，进行查询更新。