开关VoLTE流程分析(二)

AT指令，暂未发现发送AT请求的frameworks接口，通过打印信息总结AT指令：

AT+EIMSVOICE: Enable/Disable IMS Voice Capability
+EIMSVOICE=<config>
<config>: integer 
0 disable IMS Voice capability
1 enable IMS Voice capability
note:This command should set from AP side while boot-up；
At runtime, AP side could set the command anytime, and IMS module will apply the setting for next round of IMS registration；

而后有如下打印信息，发送RIL_REQUEST_SET_IMS_ENABLE请求：

此发送接口在ImsService.java 类中的onRequestImsSwitch()：

        public void onRequestImsSwitch(int simIdx, boolean isImsOn) {            int phoneId = getMainCapabilityPhoneId();            if (DBG) {                Rlog.d(LOG_TAG,"onRequestImsSwitch simIdx=" + simIdx +                        " isImsOn=" + isImsOn + " mainCapability id=" + phoneId);            }            if (mActivePhoneId != phoneId) {                mActivePhoneId = phoneId;            }            if (isImsOn) {                if (mImsState != PhoneConstants.IMS_STATE_ENABLE) { //如果是关闭状态                    mImsRILAdapter.turnOnIms(mHandler.obtainMessage(EVENT_SET_IMS_ENABLED_DONE));                    mImsState = PhoneConstants.IMS_STATE_ENABLING;                } else {                    Rlog.d(LOG_TAG, "Ims already enable and ignore to send AT command.");                }         }

ImsRILAdapter类封装消息请求，通过send()发送RIL接收端；

 

ImsIntentReceiver广播接收器，根据log打印信息：

在PhoneBase类中定义了mImsIntentReceiver广播接收器：

    private BroadcastReceiver mImsIntentReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            Rlog.d(LOG_TAG, "mImsIntentReceiver: action " + intent.getAction());            if (intent.hasExtra(ImsManager.EXTRA_PHONE_ID)) {                int extraPhoneId = intent.getIntExtra(ImsManager.EXTRA_PHONE_ID,                        SubscriptionManager.INVALID_PHONE_INDEX);                Rlog.d(LOG_TAG, "mImsIntentReceiver: extraPhoneId = " + extraPhoneId);                if (extraPhoneId == SubscriptionManager.INVALID_PHONE_INDEX ||                        extraPhoneId != getPhoneId()) {                    return;                }            }                        synchronized (PhoneProxy.lockForRadioTechnologyChange) {                //接收广播ACTION_IMS_SERVICE_UP                if (intent.getAction().equals(ImsManager.ACTION_IMS_SERVICE_UP)) {                    ......                    mImsServiceReady = true;                    updateImsPhone();                    ImsManager.updateImsServiceConfig(mContext, mPhoneId, false);                //接收广播ACTION_IMS_SERVICE_DOWN                } else if (intent.getAction().equals(ImsManager.ACTION_IMS_SERVICE_DOWN)) {                    mImsServiceReady = false;                    updateImsPhone();                }            }        }    };

 

updateImsPhone()方法如下：

    protected void updateImsPhone() {        Rlog.d(LOG_TAG, "updateImsPhone"                + " mImsServiceReady=" + mImsServiceReady);        if (mImsServiceReady && (mImsPhone == null)) {                     //创建mImsPhone notifyDataRegStateRilRadioTechnologyChanged            mImsPhone = PhoneFactory.makeImsPhone(mNotifier, this);             CallManager.getInstance().registerPhone(mImsPhone); //CallManager里添加Phone对象            mImsPhone.registerForSilentRedial(                    this, EVENT_INITIATE_SILENT_REDIAL, null); //注册消息，该消息的处理由该类处理        } else if (!mImsServiceReady && (mImsPhone != null)) {            CallManager.getInstance().unregisterPhone(mImsPhone);            mImsPhone.unregisterForSilentRedial(this);            mImsPhone.dispose();            // Potential GC issue if someone keeps a reference to ImsPhone.            // However: this change will make sure that such a reference does            // not access functions through NULL pointer.            //mImsPhone.removeReferences();            mImsPhone = null;        }EVENT_INITIATE_SILENT_REDIAL 消息的处理：            case EVENT_INITIATE_SILENT_REDIAL:                Rlog.d(LOG_TAG, "Event EVENT_INITIATE_SILENT_REDIAL Received");                ar = (AsyncResult) msg.obj;                if ((ar.exception == null) && (ar.result != null)) {                    String dialString = (String) ar.result;                    if (TextUtils.isEmpty(dialString)) return;                    try {                        dialInternal(dialString, null, VideoProfile.STATE_AUDIO_ONLY, null);                    } catch (CallStateException e) {                        Rlog.e(LOG_TAG, "silent redial failed: " + e);                    }                }                break;

 

ServiceState服务状态，有如下打印信息：

vendor/mediatek/proprietary/frameworks/opt/tedongle/src/java/android/tedongle/ServiceState.java

    private void setNullState(int state) {        if (DBG) Rlog.d(LOG_TAG, "[ServiceState] setNullState=" + state);        mVoiceRegState = state;        mDataRegState = state;        mVoiceRoamingType = ROAMING_TYPE_NOT_ROAMING;        mDataRoamingType = ROAMING_TYPE_NOT_ROAMING;        .......    }

setNullState()该方法传入的参数是3，可判定被该方法调用：

    public void setStateOff() {        setNullState(STATE_POWER_OFF);    }

ServiceState 的定义：

/**
* Normal operation condition, the phone is registered
* with an operator either in home network or in roaming.
*/
public static final int STATE_IN_SERVICE = 0;

/**
* Phone is not registered with any operator, the phone
* can be currently searching a new operator to register to, or not
* searching to registration at all, or registration is denied, or radio
* signal is not available.
*/
public static final int STATE_OUT_OF_SERVICE = 1;

/**
* The phone is registered and locked. Only emergency numbers are allowed. {@more}
*/
public static final int STATE_EMERGENCY_ONLY = 2;

/**
* Radio of telephony is explicitly powered off.
*/
public static final int STATE_POWER_OFF = 3;

 

注册消息：

    private void registerIndicationReceiver() {        if (DBG) log("registerIndicationReceiver");        IntentFilter intentfilter = new IntentFilter();        intentfilter.addAction(ImsManager.ACTION_IMS_INCOMING_CALL_INDICATION);//注册来电通知        mPhone.getContext().registerReceiver(mIndicationReceiver, intentfilter);    }

 

notifyDataRegStateRilRadioTechnologyChanged：

在GsmServiceStateTracker类的pollStateDone()方法中，调用notifyDataRegStateRilRadioTechnologyChanged()：

 

        if (hasDataRegStateChanged || hasRilDataRadioTechnologyChanged) {            notifyDataRegStateRilRadioTechnologyChanged();                      //WLAN 判断            if (ServiceState.RIL_RADIO_TECHNOLOGY_IWLAN                         == mSS.getRilDataRadioTechnology()) {                mPhone.notifyDataConnection(Phone.REASON_IWLAN_AVAILABLE);            } else {                mPhone.notifyDataConnection(null);            }        }    protected void notifyDataRegStateRilRadioTechnologyChanged() {        int rat = mSS.getRilDataRadioTechnology();        int drs = mSS.getDataRegState();        if (DBG) log("notifyDataRegStateRilRadioTechnologyChanged: drs=" + drs + " rat=" + rat);         //设置TelephonyProperties.PROPERTY_DATA_NETWORK_TYPE属性        mPhoneBase.setSystemProperty(TelephonyProperties.PROPERTY_DATA_NETWORK_TYPE,                ServiceState.rilRadioTechnologyToString(rat));        mDataRegStateOrRatChangedRegistrants.notifyResult(new Pair<Integer, Integer>(drs, rat));    }

mDataRegStateOrRatChangedRegistrants通知者注册函数：

    public void registerForDataRegStateOrRatChanged(Handler h, int what, Object obj) {        Registrant r = new Registrant(h, what, obj);        mDataRegStateOrRatChangedRegistrants.add(r); //添加监听者        notifyDataRegStateRilRadioTechnologyChanged();    }

该注册函数在ImsPhone的构造函数中被调用：

    ImsPhone(Context context, PhoneNotifier notifier, Phone defaultPhone) {        mDefaultPhone = (PhoneBase) defaultPhone;        /// M: ALPS02759855. ImsPhoneCallTracker may change service state earlier. @{        // mCT = new ImsPhoneCallTracker(this);        // mSS.setStateOff();        mSS.setStateOff();   //此处即在"ServiceState服务状态"中提到的        mCT = new ImsPhoneCallTracker(this);        /// @}        mPhoneId = mDefaultPhone.getPhoneId();        // This is needed to handle phone process crashes        // Same property is used for both CDMA & IMS phone.        mIsPhoneInEcmState = SystemProperties.getBoolean(                TelephonyProperties.PROPERTY_INECM_MODE, false);        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);        mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, LOG_TAG);        mWakeLock.setReferenceCounted(false);        if (mDefaultPhone.getServiceStateTracker() != null) {            mDefaultPhone.getServiceStateTracker()                    .registerForDataRegStateOrRatChanged(this,                    EVENT_DEFAULT_PHONE_DATA_STATE_CHANGED, null); //注册数据状态变化通知消息        }        updateDataServiceState();    }

 

EVENT_DATA_CONNECTION_DRS_OR_RAT_CHANGED消息的处理

在DataConnection.java中处理：

                case EVENT_DATA_CONNECTION_DRS_OR_RAT_CHANGED:                    ar = (AsyncResult) msg.obj;                    Pair<Integer, Integer> drsRatPair = (Pair<Integer, Integer>) ar.result;                    mDataRegState = drsRatPair.first;                    if (mRilRat != drsRatPair.second) {                        updateTcpBufferSizes(drsRatPair.second);                    }                    mRilRat = drsRatPair.second;                    if (DBG) {                        log("DcDefaultState: EVENT_DATA_CONNECTION_DRS_OR_RAT_CHANGED"                                + " drs=" + mDataRegState                                + " mRilRat=" + mRilRat);                    }                    ServiceState ss = mPhone.getServiceState(); //实例化ServiceState                    // M: [C2K][IRAT] Get network type from IRAT controller                    // TODO: check if the message is handled before                    // IratController update its current RAT.                    if (CdmaFeatureOptionUtils.isCdmaLteDcSupport()) {                      //can get networkType from svltePhoneProxy to get right network type                        ServiceState svlteSs = SvlteUtils.getSvltePhoneProxy(mPhone.getPhoneId())                                .getSvlteServiceState();                        if (svlteSs != null) {                            ss = svlteSs;                        }                    }                    int networkType = ss.getDataNetworkType();                    mNetworkInfo.setSubtype(networkType,                            TelephonyManager.getNetworkTypeName(networkType));                    if (mNetworkAgent != null) {                        updateNetworkInfoSuspendState();                        mNetworkAgent.sendNetworkCapabilities(makeNetworkCapabilities());                        mNetworkAgent.sendNetworkInfo(mNetworkInfo);                        mNetworkAgent.sendLinkProperties(mLinkProperties);                    }                    break;

设置网络参数

    public void setDataRegState(int state) {        mDataRegState = state;        if (DBG) Rlog.d(LOG_TAG, "[ServiceState] setDataRegState=" + mDataRegState);    }    public void setRilDataRadioTechnology(int rt) {        this.mRilDataRadioTechnology = rt;        if (DBG) Rlog.d(LOG_TAG, "[ServiceState] setDataRadioTechnology=" + mRilDataRadioTechnology);    }