trySetupData()里面会再一次做是否可以进行数据业务建立的判断,

1.isDataAllowed(),在该方法里面

会对PS是否attached进行判断boolean attachedState = mAttached.get();

会对sim 卡是否loaded完成进行判断:

IccRecords r = mIccRecords.get();

boolean recordsLoaded = false;

if (r != null) {

recordsLoaded = r.getRecordsLoaded();

if (DBG && !recordsLoaded) log("isDataAllowed getRecordsLoaded=" + recordsLoaded);

}

会对phone的状态,如果phone 的状态是否非idle就说明当前有电话业务,那么就要继续判断当前的radio Tech是否同时支持电话和数据业务.

PhoneConstants.State state = PhoneConstants.State.IDLE;

// Note this is explicitly not using mPhone.getState. See b/19090488.

// mPhone.getState reports the merge of CS and PS (volte) voice call state

// but we only care about CS calls here for data/voice concurrency issues.

// Calling getCallTracker currently gives you just the CS side where the

// ImsCallTracker is held internally where applicable.

// This should be redesigned to ask explicitly what we want:

// voiceCallStateAllowDataCall, or dataCallAllowed or something similar.

if (mPhone.getCallTracker() != null) {

state = mPhone.getCallTracker().getState();

}

if (state != PhoneConstants.State.IDLE &&

!mPhone.getServiceStateTracker().isConcurrentVoiceAndDataAllowed()) {

if(failureReason == null) return false;

failureReason.addDataAllowFailReason(DataAllowFailReasonType.INVALID_PHONE_STATE);

failureReason.addDataAllowFailReason(

DataAllowFailReasonType.CONCURRENT_VOICE_DATA_NOT_ALLOWED);

}

会对数据开关是否有开进行判断:

    final boolean internalDataEnabled;

    internalDataEnabled = mDataEnabledSettings.isInternalDataEnabled();

会对默认数据的sim 的subid进行判断是否为有效的subid.

    int dataSub = SubscriptionManager.getDefaultDataSubscriptionId();

    boolean defaultDataSelected = SubscriptionManager.isValidSubscriptionId(dataSub);

会对如果当前是漫游状态，漫游数据开关是否有开进行判断.

 if (mPhone.getServiceState().getDataRoaming() && !getDataOnRoamingEnabled()) {

        if(failureReason == null) return false;

        failureReason.addDataAllowFailReason(DataAllowFailReasonType.ROAMING_DISABLED);

    }

会对当前的PS是否为Restricted进行判断,mIsPsRestricted值会在消息 EVENT_PS_RESTRICT_ENABLED和 EVENT_PS_RESTRICT_DISABLED中进行赋值.

    if (mIsPsRestricted) {

        if(failureReason == null) return false;

        failureReason.addDataAllowFailReason(DataAllowFailReasonType.PS_RESTRICTED\);

    }

会对desiredPowerState和radioStateFromCarrier进行判断

    boolean desiredPowerState = mPhone.getServiceStateTracker().getDesiredPowerState();

    boolean radioStateFromCarrier = mPhone.getServiceStateTracker().getPowerStateFromCarrier();

    int radioTech = mPhone.getServiceState().getRilDataRadioTechnology();

    if (radioTech == ServiceState.RIL_RADIO_TECHNOLOGY_IWLAN) {

        desiredPowerState = true;

        radioStateFromCarrier = true;

    }