本流程图基于MTK平台 Android 7.0，拨打的普通电话，本流程只作为沟通学习使用

整体流程图

流程中部分重点知识

packages-apps目录

dialer应用的DialpadFragment.onClick中，通过用户输入号码并点击拨号按钮（R.id.dialpad_floating_action_button）发起MO在handleDialButtonPressed方法里面会判断输入框中是否含有号码，然后通过IntentUtil构造一个intent，并通过startActivityWithErrorToast启动intent，这里会判断 mProhibitedPhoneNumberRegexp = getResources().getString(R.string.config_prohibited_phone_number_regexp);`是否含有默认拒绝拨打的号码，如果含有弹出含有“Can\’t call this number”字符串的DialogFragment提示用户。在startActivityWithErrorToast中，会获取当前触摸屏幕的位置信息，并存入intent中，后续启动incallUI的时候可能会使用Point touchPoint = TouchPointManager.getInstance().getPoint();

if (touchPoint.x != 0 || touchPoint.y != 0) {

Bundle extras;

// Make sure to not accidentally clobber any existing extras

if (intent.hasExtra(TelecomManager.EXTRA_OUTGOING_CALL_EXTRAS)) {

extras = intent.getParcelableExtra(

TelecomManager.EXTRA_OUTGOING_CALL_EXTRAS);

} else {

extras = new Bundle();

}

extras.putParcelable(TouchPointManager.TOUCH_POINT, touchPoint);

intent.putExtra(TelecomManager.EXTRA_OUTGOING_CALL_EXTRAS, extras);

}在TelecomUtil的这个方法中判断是否有权限拨打号码，包括判断是否是默认的dialer，和是否有”android.permission.CALL_PHONE”;这个权限public static boolean hasCallPhonePermission(Context context) {

return isDefaultDialer(context)

|| hasPermission(context, Manifest.permission.CALL_PHONE);

}

packages-services-Telecomm目录

TelecomServiceImpl.placeCall

这里会做一些检查，比如：权限检查和包检查，即使call 的权限是关闭的也会走这里，因为一些特殊的通话，比如：紧急通话，在后面的UserCallIntentProcessor中会把不是紧急号码切权限是关闭的通话给结束。

final boolean hasCallAppOp = mAppOpsManager.noteOp(AppOpsManager.OP_CALL_PHONE,Binder.getCallingUid(), callingPackage) == AppOpsManager.MODE_ALLOWED;final boolean hasCallPermission = mContext.checkCallingPermission(CALL_PHONE) ==PackageManager.PERMISSION_GRANTED;12345

UserCallIntentProcessor

processIntent

public void processIntent(Intent intent, String callingPackageName,boolean canCallNonEmergency) {// Ensure call intents are not processed on devices that are not capable of calling.if (!isVoiceCapable()) {//通过com.android.internal.R.bool.config_voice_capable判断是否支持通话，比如：流量卡就不支持通话，并不会启动incallUIreturn;}String action = intent.getAction();if (Intent.ACTION_CALL.equals(action) ||Intent.ACTION_CALL_PRIVILEGED.equals(action) ||Intent.ACTION_CALL_EMERGENCY.equals(action)) {processOutgoingCallIntent(intent, callingPackageName, canCallNonEmergency);}}public static final String ACTION_DIAL = "android.intent.action.DIAL";//普通电话进入dialer界面的拨号盘public static final String ACTION_CALL = "android.intent.action.CALL";//只能拨打普通电话不能拨打紧急号码，M即以上必须有android.Manifest.permission#CALL_PHONE权限public static final String ACTION_CALL_EMERGENCY = "android.intent.action.CALL_EMERGENCY"; //只能拨打紧急号码的actionpublic static final String ACTION_CALL_PRIVILEGED = "android.intent.action.CALL_PRIVILEGED";//可以拨打任意类型电话的action12345678910111213141516171819

processOutgoingCallIntent

判断是正常的通话类型是否是SIP phone

if (!PhoneAccount.SCHEME_VOICEMAIL.equals(scheme)) {handle = Uri.fromParts(PhoneNumberUtils.isUriNumber(uriString) ?PhoneAccount.SCHEME_SIP : PhoneAccount.SCHEME_TEL, uriString, null);//构造intent的data}public static boolean isUriNumber(String number) {// Note we allow either "@" or "%40" to indicate a URI, in case// the passed-in string is URI-escaped. (Neither "@" nor "%40"// will ever be found in a legal PSTN number.)return number != null && (number.contains("@") || number.contains("%40"));}12345678910

判断是否有DISALLOW_OUTGOING_CALLS的限制，如果拨打的是emergency call则忽略这个限制，如果拨打的正常号码且具有这个限制，或者权限没有通过，不允许打正常的电话，则弹出错误的对话框 like：“Only emergency calls are allowed.”or “This application cannot make outgoing calls without the Phone permission.”如果是video_call并且打的是emergency_call则需要将video的状态改成voice来打emergency_call

intent.putExtra(CallIntentProcessor.KEY_IS_PRIVILEGED_DIALER,isDefaultOrSystemDialer(callingPackageName));//判断是否是默认或者系统的dialer应用，如果是才可以打emergency_call12

PrimaryCallReceiver

public void onReceive(Context context, Intent intent) {Log.startSession("PCR.oR");synchronized (getTelecomSystem().getLock()) {if (!ExtensionManager.getCallMgrExt().shouldPreventVideoCallIfLowBattery(context, intent)) {//如果是video_call的话，判断当前的电量是否处于低电模式，现在默认是返回false，后续会根据不同项目要求做定制getTelecomSystem().getCallIntentProcessor().processIntent(intent);}}Log.endSession();}12345678910

CallIntentProcessor

processOutgoingCallIntent

这个方法里面主要还是重新拿出intent里面的数据，并判断当前是否是主要的dialer，是否sip_phone，是否有phone账户，是否是video状态，用哪一张卡打，是否是IMS通话请求，是否是会议通话请求，根据这些判断再重新构造intent的Extras，然后通过前面得到的状态创建一个call，如果是conference的话直接创建链接，如果不是则继续往下执行

if (intent.hasExtra(TelecomUtils.EXTRA_SLOT)) {int slotId = intent.getIntExtra(TelecomUtils.EXTRA_SLOT, -1);phoneAccountHandle = TelecomUtils.getPhoneAccountHandleWithSlotId(context, slotId, phoneAccountHandle);//如果有多张卡的话会拿到重那张卡拨打号码}12345

// Send to CallsManager to ensure the InCallUI gets kicked off before the broadcast returnsCall call = callsManager.startOutgoingCall(handle, phoneAccountHandle, clientExtras, initiatingUser);//通过这里来启动incallUI123

NewOutgoingCallIntentBroadcaster

processIntent

先判断是否是VoicemailNumber，然后再得到格式化号码包括大小写转换成数字，分隔符的分离，判断是否是潜在的紧急号码，再将action为ACTION_CALL_PRIVILEGED类型的通话变成ACTION_CALL_EMERGENCY或者ACTION_CALL，

* - CALL (intent launched by all third party dialers)

* - CALL_PRIVILEGED (intent launched by system apps e.g. system Dialer, voice Dialer)

* - CALL_EMERGENCY (intent launched by lock screen emergency dialer) 如果是拨打紧急号码的话会直接调用placeOutgoingCall，否则会执行后面的流程发送广播。

boolean isUriNumber = mPhoneNumberUtilsAdapter.isUriNumber(number);//判断通话类型，是否是sip_phoneif (!isUriNumber) {number = mPhoneNumberUtilsAdapter.convertKeypadLettersToDigits(number);//将号码字符串的字母转换成数字number = mPhoneNumberUtilsAdapter.stripSeparators(number);//将号码中的分割符分离}final boolean isPotentialEmergencyNumber = isPotentialEmergencyNumber(number);//判断是否是潜在的紧急号码Log.v(this, "isPotentialEmergencyNumber = %s", isPotentialEmergencyNumber);rewriteCallIntentAction(intent, isPotentialEmergencyNumber);//将ACTION_CALL_PRIVILEGED变成ACTION_CALL_EMERGENCY或者ACTION_CALL12345678910

CallsManager

placeOutgoingCall

这里主要是对CDMA模式的call的广播，然后就是根据一些状态判断speaker的开关，是否是紧急号码的判断，然后就是开始创建链接

CreateConnectionProcessor

attemptNextPhoneAccount

if (mCallResponse != null && attempt != null) {Log.i(this, "Trying attempt %s", attempt);PhoneAccountHandle phoneAccount = attempt.connectionManagerPhoneAccount;mService = mRepository.getService(phoneAccount.getComponentName(),phoneAccount.getUserHandle());//得到创建链接的serviceif (mService == null) {Log.i(this, "Found no connection service for attempt %s", attempt);attemptNextPhoneAccount();} else {mCall.setConnectionManagerPhoneAccount(attempt.connectionManagerPhoneAccount);//设置phoneaccount的ConnectionManagermCall.setTargetPhoneAccount(attempt.targetPhoneAccount);mCall.setConnectionService(mService);//设置servicesetTimeoutIfNeeded(mService, attempt);mService.createConnection(mCall, this);//创建链接}}1234567891011121314151617

ConnectionServiceWrapper

createConnection

通过binder创建链接，如果创建成功，先会判断callid是否为null以应对某些特定情况下链接创建成功前呼叫就已经断开了，这种情况下会打印错误log和DisconnectCause.ERROR的response返回，然后继续往下执行创建链接。

try {/// M: For VoLTE @{boolean isConferenceDial = call.isConferenceDial();if (isConferenceDial) {logOutgoing("createConference(%s) via %s.", call, getComponentName());mServiceInterface.createConference(//会议链接call.getConnectionManagerPhoneAccount(),callId,new ConnectionRequest(call.getTargetPhoneAccount(),call.getHandle(),extras,call.getVideoState(),callId),call.getConferenceParticipants(),call.isIncoming());} else {mServiceInterface.createConnection(//普通链接call.getConnectionManagerPhoneAccount(),callId,new ConnectionRequest(call.getTargetPhoneAccount(),call.getHandle(),extras,call.getVideoState(),callId),call.shouldAttachToExistingConnection(),call.isUnknown());}/// @}} catch (RemoteException e) {Log.e(this, e, "Failure to createConnection -- %s", getComponentName());mPendingResponses.remove(callId).handleCreateConnectionFailure(new DisconnectCause(DisconnectCause.ERROR, e.toString()));}123456789101112131415161718192223242526272829303132333435

packages-services-Telephony目录

TelephonyConnectionService

onCreateOutgoingConnection

这里会做一系列的判断：

拨打号码是否为null，拨打电话的账户是否存在判断是否是ECC重连（紧急号码相关），如果是将voiceemail的通话类型转换成tel，否则判断当前号码是否和*228正则表达式匹配，如果匹配就拒绝此次链接，因为这些特殊的数字用于OTASP,如果不禁用可能将LTE锁定到3G网络下。判断phone是否为null，如果为null并且config_checkSimStateBeforeOutgoingCall值为true就会去检查当前SIM卡的状态，并确定是否弹出PIN码的输入框判断飞行模式是否打开判断如果是拨打紧急号码且当前处于4G only数据链接状态，者取消这次链接判断当前网络是否注册成功判断当前是否是紧急号码并处于isInEcm模式，如果拨打的不是紧急号码，但是当前处于ECM模式，则KEY_ALLOW_NON_EMERGENCY_CALLS_IN_ECM_BOOL这个bool值觉得是否结束当前链接（ECM模式是指紧急呼叫回拨模式，一般GSM网络不支持，CDMA网络支持）对service状态的判断，处理不部分异常信息如果是videocall则判断TTY是否开启，如果开启则断开链接(TTY聋哑人专用模式)链接的初始化，number，video状态这些的配置

// If configured, reject attempts to dial numbers matching this pattern.private static final Pattern CDMA_ACTIVATION_CODE_REGEX_PATTERN =pile("\\*228[0-9]{0,2}");/// M: For ECC change feature @{if (isEmergencyNumber) {if (mSwitchPhoneHelper == null) {mSwitchPhoneHelper = new SwitchPhoneHelper(this, number);}if (mSwitchPhoneHelper.needToPrepareForDial()) {mSwitchPhoneHelper.prepareForDial(new SwitchPhoneHelper.Callback() {@Overridepublic void onComplete(boolean success) {if (connection.getState() == Connection.STATE_DISCONNECTED) {Log.d(this, "prepareForDial, connection disconnect");} else if (success) {Log.d(this, "startTurnOnRadio");startTurnOnRadio(connection, request, number);} else {/// M: CC: ECC Retry @{// Assume only one ECC exists// Not trigger retry since Modem fails to// power on should be a bugif (TelephonyConnectionServiceUtil.getInstance().isEccRetryOn()) {Log.d(this, "ECC Retry : clear ECC param");TelephonyConnectionServiceUtil.getInstance().clearEccRetryParams();}/// @}Log.d(this, "prepareForDial, failed to turn on radio");connection.setDisconnected(DisconnectCauseUtil.toTelecomDisconnectCause(android.telephony.DisconnectCause.POWER_OFF,"Failed to turn on radio."));connection.destroy();}}});/// @}} else {/// M: CC: ECC Retry @{if (!TelephonyConnectionServiceUtil.getInstance().isEccRetryOn()) {Log.d(this, "ECC Retry : set param with Intial ECC.");TelephonyConnectionServiceUtil.getInstance().setEccRetryParams(request,phone.getPhoneId());}/// @}if (useEmergencyCallHelper) {if (mEmergencyCallHelper == null) {mEmergencyCallHelper = new EmergencyCallHelper(this);}final Phone eccPhone = phone;mEmergencyCallHelper.startTurnOnRadioSequence(eccPhone,new EmergencyCallHelper.Callback() {@Overridepublic void onComplete(boolean isRadioReady) {if (connection.getState() == Connection.STATE_DISCONNECTED) {Log.d(this, "onCreateOutgoingConnection,"+ " connection disconnected");// If the connection has already been disconnected,// do nothing.} else if (isRadioReady) {///M: 4G data only @{if (TelephonyConnectionServiceUtil.getInstance().isDataOnlyMode(eccPhone)) {Log.d(this, "startTurnOnRadioSequence, 4G data only");/// M: CC: ECC Retry @{// Assume only one ECC existsif (TelephonyConnectionServiceUtil.getInstance().isEccRetryOn()) {Log.d(this, "ECC Retry : clear ECC param");TelephonyConnectionServiceUtil.getInstance().clearEccRetryParams();}/// @}connection.setDisconnected(DisconnectCauseUtil.toTelecomDisconnectCause(android.telephony.DisconnectCause.OUTGOING_CANCELED, null));connection.destroy();return;}/// @}connection.setInitialized();placeOutgoingConnection(connection, eccPhone, request);} else {/// M: CC: ECC Retry @{// Assume only one ECC exists// Not trigger retry since Modem fails to// power on should be a bugif (TelephonyConnectionServiceUtil.getInstance().isEccRetryOn()) {Log.d(this, "ECC Retry : clear ECC param");TelephonyConnectionServiceUtil.getInstance().clearEccRetryParams();}/// @}Log.d(this, "onCreateOutgoingConnection,"+ " failed to turn on radio");connection.setDisconnected(DisconnectCauseUtil.toTelecomDisconnectCause(android.telephony.DisconnectCause.POWER_OFF,"Failed to turn on radio."));connection.destroy();}}});} else {placeOutgoingConnection(connection, phone, request);}}} else {placeOutgoingConnection(connection, phone, request);}12345678910111213141516171819222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117

frameworks-opt-telephony目录

dial

这里会判断是否是IMScall，GSMcall，WiFicall，紧急通话，然后通过不同的phone继续下发dial指令

public Connection dial(String dialString, UUSInfo uusInfo, int videoState, Bundle intentExtras)throws CallStateException {if (!isPhoneTypeGsm() && uusInfo != null) {throw new CallStateException("Sending UUS information NOT supported in CDMA!");}boolean isEmergency = PhoneNumberUtils.isEmergencyNumber(dialString);Phone imsPhone = mImsPhone;CarrierConfigManager configManager =(CarrierConfigManager) mContext.getSystemService(Context.CARRIER_CONFIG_SERVICE);boolean alwaysTryImsForEmergencyCarrierConfig = configManager.getConfigForSubId(getSubId()).getBoolean(CarrierConfigManager.KEY_CARRIER_USE_IMS_FIRST_FOR_EMERGENCY_BOOL);boolean imsUseEnabled = isImsUseEnabled()&& imsPhone != null&& (imsPhone.isVolteEnabled() || imsPhone.isWifiCallingEnabled() ||(imsPhone.isVideoEnabled() && VideoProfile.isVideo(videoState)))&& (imsPhone.getServiceState().getState() == ServiceState.STATE_IN_SERVICE);boolean useImsForEmergency = imsPhone != null&& isEmergency&& alwaysTryImsForEmergencyCarrierConfig&& ImsManager.isNonTtyOrTtyOnVolteEnabled(mContext)&& (imsPhone.getServiceState().getState() != ServiceState.STATE_POWER_OFF);/// M: @{if (!isPhoneTypeGsm()) {useImsForEmergency = false;//TODO: remove this workaround for ECC fail}/// @}String dialPart = PhoneNumberUtils.extractNetworkPortionAlt(PhoneNumberUtils.stripSeparators(dialString));boolean isUt = (dialPart.startsWith("*") || dialPart.startsWith("#"))&& dialPart.endsWith("#");boolean useImsForUt = imsPhone != null && imsPhone.isUtEnabled();if (DBG) {logd("imsUseEnabled=" + imsUseEnabled+ ", useImsForEmergency=" + useImsForEmergency+ ", useImsForUt=" + useImsForUt+ ", isUt=" + isUt+ ", imsPhone=" + imsPhone+ ", imsPhone.isVolteEnabled()="+ ((imsPhone != null) ? imsPhone.isVolteEnabled() : "N/A")+ ", imsPhone.isVowifiEnabled()="+ ((imsPhone != null) ? imsPhone.isWifiCallingEnabled() : "N/A")+ ", imsPhone.isVideoEnabled()="+ ((imsPhone != null) ? imsPhone.isVideoEnabled() : "N/A")+ ", imsPhone.getServiceState().getState()="+ ((imsPhone != null) ? imsPhone.getServiceState().getState() : "N/A"));}Phone.checkWfcWifiOnlyModeBeforeDial(mImsPhone, mContext);/// M: should be removed later, just for debug @{Rlog.w(LOG_TAG, "IMS: imsphone = " + imsPhone + "isEmergencyNumber = "+ PhoneNumberUtils.isEmergencyNumber(dialString));if (imsPhone != null) {Rlog.w(LOG_TAG, "service state = " + imsPhone.getServiceState().getState());}/// @}if ((imsUseEnabled && (!isUt || useImsForUt)) || useImsForEmergency) {/// M: CC: Check GSM call state to avoid InCallMMI dispatching to IMS @{// [ALPS02516173],[ALPS02615800]if (isInCSCall()) {if (DBG) Rlog.d(LOG_TAG, "has CS Call. Don't try IMS PS Call!");} else {/// @}try {/// M: ALPS02137073 3G VT Refactoryif (videoState == VideoProfile.STATE_AUDIO_ONLY) {if (DBG) Rlog.d(LOG_TAG, "Trying IMS PS call");return imsPhone.dial(dialString, uusInfo, videoState, intentExtras);} else {if (SystemProperties.get("persist.mtk_vilte_support").equals("1")) {if (DBG) {Rlog.d(LOG_TAG, "Trying IMS PS video call");}return imsPhone.dial(dialString, uusInfo, videoState, intentExtras);} else {/// M: CC: For 3G VT only @{if (DBG) {Rlog.d(LOG_TAG, "Trying (non-IMS) CS video call");}return dialInternal(dialString, uusInfo, videoState, intentExtras);/// @}}}} catch (CallStateException e) {if (DBG) logd("IMS PS call exception " + e +"imsUseEnabled =" + imsUseEnabled + ", imsPhone =" + imsPhone);if (!Phone.CS_FALLBACK.equals(e.getMessage())) {CallStateException ce = new CallStateException(e.getMessage());ce.setStackTrace(e.getStackTrace());throw ce;}}/// M: CC: Check GSM call state to avoid InCallMMI dispatching to IMS @{}/// @}}/// M: CC: FTA requires call should be dialed out even out of service @{if (SystemProperties.getInt("gsm.gcf.testmode", 0) != 2) {if (mSST != null && mSST.mSS.getState() == ServiceState.STATE_OUT_OF_SERVICE&& mSST.mSS.getDataRegState() != ServiceState.STATE_IN_SERVICE&& !isEmergency) {throw new CallStateException("cannot dial in current state");}}/// @}if (DBG) logd("Trying (non-IMS) CS call");if (isPhoneTypeGsm()) {/// M: CC: For 3G VT only @{//return dialInternal(dialString, null, VideoProfile.STATE_AUDIO_ONLY, intentExtras);return dialInternal(dialString, null, videoState, intentExtras);/// @}} else {return dialInternal(dialString, null, videoState, intentExtras);}}1234567891011121314151617181922232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811911122123124125126127

dialInternal

这里主要是判断是否是MMI code如果是的话就只执行MMIcode的指令，否则继续往下下发拨号动作。

@Overrideprotected Connection dialInternal(String dialString, UUSInfo uusInfo, int videoState,Bundle intentExtras)throws CallStateException {// Need to make sure dialString gets parsed properly/// M: Ignore stripping for VoLTE SIP uri. @{// String newDialString = PhoneNumberUtils.stripSeparators(dialString);String newDialString = dialString;if (!PhoneNumberUtils.isUriNumber(dialString)) {// Need to make sure dialString gets parsed properlynewDialString = PhoneNumberUtils.stripSeparators(dialString);}/// @}if (isPhoneTypeGsm()) {// handle in-call MMI first if applicableif (handleInCallMmiCommands(newDialString)) {return null;}// Only look at the Network portion for mmiString networkPortion = PhoneNumberUtils.extractNetworkPortionAlt(newDialString);GsmMmiCode mmi =GsmMmiCode.newFromDialString(networkPortion, this, mUiccApplication.get());if (DBG) logd("dialing w/ mmi '" + mmi + "'...");if (mmi == null) {/// M: CC: For 3G VT only @{//return mCT.dial(newDialString, uusInfo, intentExtras);if (videoState == VideoProfile.STATE_AUDIO_ONLY) {return mCT.dial(newDialString, uusInfo, intentExtras);} else {if (!is3GVTEnabled()) {throw new CallStateException("cannot vtDial for non-3GVT-capable device");}return mCT.vtDial(newDialString, uusInfo, intentExtras);}/// @}} else if (mmi.isTemporaryModeCLIR()) {/// M: CC: For 3G VT only @{//return mCT.dial(mmi.mDialingNumber, mmi.getCLIRMode(), uusInfo, intentExtras);if (videoState == VideoProfile.STATE_AUDIO_ONLY) {return mCT.dial(mmi.mDialingNumber, mmi.getCLIRMode(), uusInfo, intentExtras);} else {if (!is3GVTEnabled()) {throw new CallStateException("cannot vtDial for non-3GVT-capable device");}return mCT.vtDial(mmi.mDialingNumber, mmi.getCLIRMode(), uusInfo, intentExtras);}/// @}} else {mPendingMMIs.add(mmi);/// M: @{Rlog.d(LOG_TAG, "dialInternal: " + dialString + ", mmi=" + mmi);dumpPendingMmi();/// @}mMmiRegistrants.notifyRegistrants(new AsyncResult(null, mmi, null));try {mmi.processCode();} catch (CallStateException e) {//do nothing}// FIXME should this return null or something else?return null;}} else {return mCT.dial(newDialString);}}12345678910111213141516171819222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172

GsmCdmaCallTracker

dial

清楚所有已断开的链接，并通知call的状态改变如果当前有一个call处于前台，我们需要将它hold住，并通过一个500毫秒的延时来执行hold这个操作，直到我们收到EVENT_SWITCH_RESULT执行结束的标记，如果不延时在多方会议通话的时候可能出现问题设置为mute

public synchronized Connection dial(String dialString, int clirMode, UUSInfo uusInfo,Bundle intentExtras)throws CallStateException {// note that this triggers call state changed notifclearDisconnected();if (!canDial()) {throw new CallStateException("cannot dial in current state");}String origNumber = dialString;dialString = convertNumberIfNecessary(mPhone, dialString);// The new call must be assigned to the foreground call.// That call must be idle, so place anything that's// there on holdif (mForegroundCall.getState() == GsmCdmaCall.State.ACTIVE) {// this will probably be done by the radio anyway// but the dial might fail before this happens// and we need to make sure the foreground call is clear// for the newly dialed connection/// M: CC: Proprietary CRSS handling @{mWaitingForHoldRequest.set();/// @}switchWaitingOrHoldingAndActive();// This is a hack to delay DIAL so that it is sent out to RIL only after// EVENT_SWITCH_RESULT is received. We've seen failures when adding a new call to// multi-way conference calls due to DIAL being sent out before SWITCH is processedtry {Thread.sleep(500);} catch (InterruptedException e) {// do nothing}// Fake local state so that// a) foregroundCall is empty for the newly dialed connection// b) hasNonHangupStateChanged remains false in the// next poll, so that we don't clear a failed dialing callfakeHoldForegroundBeforeDial();}if (mForegroundCall.getState() != GsmCdmaCall.State.IDLE) {//we should have failed in !canDial() above before we get herethrow new CallStateException("cannot dial in current state");}mPendingMO = new GsmCdmaConnection(mPhone, checkForTestEmergencyNumber(dialString),this, mForegroundCall);mHangupPendingMO = false;if ( mPendingMO.getAddress() == null || mPendingMO.getAddress().length() == 0|| mPendingMO.getAddress().indexOf(PhoneNumberUtils.WILD) >= 0) {// Phone number is invalidmPendingMO.mCause = DisconnectCause.INVALID_NUMBER;/// M: CC: Proprietary CRSS handling @{mWaitingForHoldRequest.reset();/// @}// handlePollCalls() will notice this call not present// and will mark it as dropped.pollCallsWhenSafe();} else {// Always unmute when initiating a new callsetMute(false);/// M: CC: Proprietary CRSS handling @{//mCi.dial(mPendingMO.getAddress(), clirMode, uusInfo, obtainCompleteMessage());if (!mWaitingForHoldRequest.isWaiting()) {/// M: CC: Proprietary ECC handling@{/// M: CC: ECC Retry @{if (PhoneNumberUtils.isEmergencyNumber(mPhone.getSubId(), dialString)/// @}&& !PhoneNumberUtils.isSpecialEmergencyNumber(dialString)) {int serviceCategory = PhoneNumberUtils.getServiceCategoryFromEcc(dialString);mCi.setEccServiceCategory(serviceCategory);mCi.emergencyDial(mPendingMO.getAddress(), clirMode, uusInfo,obtainCompleteMessage(EVENT_DIAL_CALL_RESULT));/// @}} else {mCi.dial(mPendingMO.getAddress(), clirMode, uusInfo,obtainCompleteMessage(EVENT_DIAL_CALL_RESULT));}} else {mWaitingForHoldRequest.set(mPendingMO.getAddress(), clirMode, uusInfo);}/// @}}if (mNumberConverted) {mPendingMO.setConverted(origNumber);mNumberConverted = false;}updatePhoneState();mPhone.notifyPreciseCallStateChanged();return mPendingMO;}12345678910111213141516171819222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101

Log信息

Line 10357: 12-19 09:17:32.193 I/Telecom ( 988): CallIntentProcessor: onReceive - isUnknownCall: false: PCR.oR@AOY Line 10473: 12-19 09:17:32.288 V/Telecom ( 988): CallsManager: startOutgoingCall found accounts = [PhoneAccountHandle{TelephonyConnectionService, 89860115881029413909, UserHandle{0}}]: PCR.oR@AOY Line 10553: 12-19 09:17:32.351 V/Telecom ( 988): NewOutgoingCallIntentBroadcaster: Processing call intent in OutgoingCallIntentBroadcaster.: PCR.oR@AOY Line 10872: 12-19 09:17:32.406 V/Telecom ( 988): NewOutgoingCallIntentBroadcaster: isPotentialEmergencyNumber = false: PCR.oR@AOY Line 10877: 12-19 09:17:32.407 I/Telecom ( 988): NewOutgoingCallIntentBroadcaster: Sending NewOutgoingCallBroadcast for [TC@2, CONNECTING, null, tel:10010, A, childs(0), has_parent(false), [Capabilities:], [Properties:]] to UserHandle{0}: PCR.oR@AOY Line 10878: 12-19 09:17:32.408 V/Telecom ( 988): NewOutgoingCallIntentBroadcaster: Broadcasting intent: Intent { act=android.intent.action.NEW_OUTGOING_CALL flg=0x10000000 (has extras) }.: PCR.oR@AOY Line 11902: 12-19 09:17:33.374 V/Telecom ( 988): NewOutgoingCallBroadcastIntentReceiver: onReceive: Intent { act=android.intent.action.NEW_OUTGOING_CALL flg=0x10000010 (has extras) }: NOCBIR.oR@AOw Line 11903: 12-19 09:17:33.374 I/Telecom ( 988): NewOutgoingCallBroadcastIntentReceiver: Received new-outgoing-call-broadcast for [TC@2, CONNECTING, null, tel:10010, A, childs(0), has_parent(false), [Capabilities:], [Properties:]] with data 10010: NOCBIR.oR@AOw Line 11950: 12-19 09:17:33.426 V/Telecom ( 988): NewOutgoingCallBroadcastIntentReceiver: Call number unmodified after new outgoing call intent broadcast.: NOCBIR.oR@AOw Line 11951: 12-19 09:17:33.426 D/Telecom ( 988): CallsManager: broadcastCallPlacedIntent Entry: NOCBIR.oR@AOw Line 11954: 12-19 09:17:33.427 D/Telecom ( 988): CallsManager: Creating a new outgoing call with handle: tel:10010: NOCBIR.oR@AOw Line 12034: 12-19 09:17:33.495 D/Telecom ( 988): CallsManager: [TC@2, CONNECTING, null, tel:10010, A, childs(0), has_parent(false), [Capabilities:], [Properties:]] Starting with speakerphone because car is docked.: NOCBIR.oR@AOw Line 12038: 12-19 09:17:33.498 V/Telecom ( 988): CreateConnectionProcessor: process: NOCBIR.oR@AOw Line 12044: 12-19 09:17:33.513 I/Telecom ( 988): PhoneAccountRegistrar: SimCallManager queried, returning: null: NOCBIR.oR@AOwLine 12045: 12-19 09:17:33.513 V/Telecom ( 988): CreateConnectionProcessor: setConnectionManager, not changing: NOCBIR.oR@AOwLine 12046: 12-19 09:17:33.514 V/Telecom ( 988): CreateConnectionProcessor: attemptNextPhoneAccount: NOCBIR.oR@AOw Line 12047: 12-19 09:17:33.515 I/Telecom ( 988): CreateConnectionProcessor: Trying attempt CallAttemptRecord(PhoneAccountHandle{TelephonyConnectionService, 89860115881029413909, UserHandle{0}},PhoneAccountHandle{TelephonyConnectionService, 89860115881029413909, UserHandle{0}}): NOCBIR.oR@AOw Line 12050: 12-19 09:17:33.517 D/Telecom ( 988): ConnectionServiceWrapper: createConnection([TC@2, CONNECTING, com.android.phone/com.android.services.telephony.TelephonyConnectionService, tel:10010, A, childs(0), has_parent(false), [Capabilities:], [Properties:]]) via ComponentInfo{com.android.phone/com.android.services.telephony.TelephonyConnectionService}.: NOCBIR.oR@AOw Line 12051: 12-19 09:17:33.517 D/Telecom ( 988): ConnectionServiceWrapper: bind(): NOCBIR.oR@AOw Line 12073: 12-19 09:17:33.553 D/Telecom ( 988): ConnectionServiceWrapper: Telecom -> ConnectionService: addConnectionServiceAdapter com.android.server.telecom.ConnectionServiceWrapper$Adapter@edb67c1: SBC.oSC@AO0 Line 12077: 12-19 09:17:33.558 D/TelecomFramework( 1489): : Enqueueing pre-init request TC@2 Line 12090: 12-19 09:17:33.585 D/TelecomFramework( 1489): TelephonyConnectionService: createConnection, callManagerAccount: PhoneAccountHandle{TelephonyConnectionService, 89860115881029413909, UserHandle{0}}, callId: TC@2, request: ConnectionRequest tel:10010 Bundle[mParcelledData.dataSize=392], isIncoming: false, isUnknown: false Line 12092: 12-19 09:17:33.587 I/Telephony( 1489): TelephonyConnectionService: onCreateOutgoingConnection, request: ConnectionRequest tel:10010 Bundle[mParcelledData.dataSize=392] Line 12093: 12-19 09:17:33.589 D/Telephony( 1489): TelephonyConnectionService: onCreateOutgoingConnection, ConnectionRequest.PhoneAccountHandle{TelephonyConnectionService, 89860115881029413909, UserHandle{0}} 12-19 09:17:33.645 D/Telephony( 1489): TelephonyConnectionService: Service state:0, isAirplaneModeOn:falseLine 12196: 12-19 09:17:33.764 D/GsmCdmaPhone( 1489): [GsmCdmaPhone] imsUseEnabled=false, useImsForEmergency=false, useImsForUt=false, isUt=false, imsPhone=Handler (com.android.internal.telephony.imsphone.ImsPhone) {cea3f01}, imsPhone.isVolteEnabled()=false, imsPhone.isVowifiEnabled()=false, imsPhone.isVideoEnabled()=false, imsPhone.getServiceState().getState()=1 Line 12200: 12-19 09:17:33.765 W/GsmCdmaPhone( 1489): IMS: imsphone = Handler (com.android.internal.telephony.imsphone.ImsPhone) {cea3f01}isEmergencyNumber = false Line 12201: 12-19 09:17:33.765 W/GsmCdmaPhone( 1489): service state = 1 Line 12202: 12-19 09:17:33.765 D/GsmCdmaPhone( 1489): [GsmCdmaPhone] Trying (non-IMS) CS call Line 12240: 12-19 09:17:33.796 D/GsmCdmaPhone( 1489): [GsmCdmaPhone] dialing w/ mmi 'null'... Line 12258: 12-19 09:17:33.808 D/RILJ ( 1489): [3939]> SET_MUTE false [SUB0] Line 12270: 12-19 09:17:33.815 I/AT( 1015): AT> AT+CMUT=0 (RIL_CMD_READER_2, tid:515433460816) Line 12273: 12-19 09:17:33.817 D/RILJ ( 1489): [3940]> DIAL [SUB0] Line 12426: 12-19 09:17:33.874 D/TelecomFramework( 1489): TelephonyConnectionService: createConnection, connection: [TelephonyConnection objId:156910251 telecomCallID:TC@2 type:gsm state:DIALING capabilities:[Capabilities: CAPABILITY_SUPPORT_HOLD CAPABILITY_MUTE CAPABILITY_CANNOT_DOWNGRADE_VIDEO_TO_AUDIO CAPABILITY_SEPARATE_FROM_CONFERENCE CAPABILITY_DISCONNECT_FROM_CONFERENCE] properties:[Properties:] address:tel:10010 originalConnection: callId: TC@2 incoming: false state: DIALING post dial state: NOT_STARTED partOfConf:N] Line 12440: 12-19 09:17:33.881 V/TelecomFramework( 1489): TelephonyConnectionService: createConnection, number: 10010, state: DIALING, capabilities: [Capabilities: CAPABILITY_SUPPORT_HOLD CAPABILITY_MUTE CAPABILITY_CANNOT_DOWNGRADE_VIDEO_TO_AUDIO CAPABILITY_SEPARATE_FROM_CONFERENCE CAPABILITY_DISCONNECT_FROM_CONFERENCE], properties: [Properties:]12-19 09:17:33.881 D/TelecomFramework( 1489): TelephonyConnectionService: createConnection, calling handleCreateConnectionSuccessful TC@212345678910111213141516171819222324252627282930313233343536

总结

通过上面流程的分析，和部分逻辑代码的跟踪，我们可以大致了解整个拨号流程所涉及到的目录和类，大致明白了整个过程中的一些状态判断和逻辑处理，后续还会对incallUI界面的构成和流程中某些细分领域的详细研究。

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