Android Tel 拨打电话及来电流程分析

打电话流程

接下来分析一下打电话的流程。输入电话号码的流程这里忽略。输入电话号码之后会点击拨打图标。之后就会走拨打电话的流程了。这部分是在packages/apps/Dialer/src/com/android/dialer/DialtactsActivity.java中实现的。
下面分析源码分析

    public void onClick(View view) {switch (view.getId()) {case R.id.floating_action_button:if (mListsFragment.getCurrentTabIndex()== ListsFragment.TAB_INDEX_ALL_CONTACTS && !mInRegularSearch) {DialerUtils.startActivityWithErrorToast(this,IntentUtil.getNewContactIntent(),R.string.add_contact_not_available);} else if (!mIsDialpadShown) {mInCallDialpadUp = false;showDialpadFragment(true);mFloatingActionButton.setImageResource(R.drawable.fab_ic_call);mFloatingActionButton.setVisibility(view.VISIBLE);setConferenceDialButtonImage(false);setConferenceDialButtonVisibility(true);} else {//用户点击拨打键mDialpadFragment.dialButtonPressed();}break;}}

上面就是click之后将会调用packages/apps/Dialer/src/com/android/dialer/dialpad/DialpadFragment.java

public void dialButtonPressed() {getView().performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY);//按键反馈
handleDialButtonPressed();
}private void handleDialButtonPressed() {final Intent intent = CallUtil.getCallIntent(number);
if (!isDigitsShown && !PhoneNumberUtils.isEmergencyNumber(number)) {// must be dial conference add extraintent.putExtra(EXTRA_DIAL_CONFERENCE_URI, true);
}intent.putExtra(ADD_PARTICIPANT_KEY, mAddParticipant && isPhoneInUse());DialerUtils.startActivityWithErrorToast(getActivity(), intent);hideAndClearDialpad(false);}

之后就开始启动拨号的Activity
启动Activity代码如下：

packages/apps/Dialer/src/com/android/dialer/util/DialerUtils.javapublic static void startActivityWithErrorToast(Context context, Intent intent, int msgId) {try {if ((IntentUtil.CALL_ACTION.equals(intent.getAction())&& context instanceof Activity)) {final TelecomManager tm =(TelecomManager) context.getSystemService(Context.TELECOM_SERVICE);tm.placeCall(intent.getData(), intent.getExtras());} else {context.startActivity(intent);}} catch (ActivityNotFoundException e) {Toast.makeText(context, msgId, Toast.LENGTH_SHORT).show();}}

这里面有两种拨号的方式：1.直接调用TelecomManager进行呼叫；2，启动一个Activity显示拨号界面。
这里面有一个转换过程：public static final String CALL_ACTION = Intent.ACTION_CALL;
之后拨打电话的流程如下图：

UserCallActivityUserCallIntPrimaryCallReceiverCallIntentProcessorNewOutgoingCallICallsManagerCallCreateConnecConnectionSeConnectionServiceTelephonyConnPhoneCallTrackerRILonCreateprocessIntentsendBroadcastToReceiver with KEY_IS_PRIVILEGED_DIALERonReceiveprocessOutgoingCallIntentprocessIntentprocessIntentplaceOutgoingCallstartCreateConnectionnewprocessattemptNextPhoneAccountcreateConnectionsendmessage(MSG_CREATE_CONNECTION)onCreateOutgoingConnectiononCreateOutgoingConnectionplaceOutgoingConnectiondialdialdialUserCallActivityUserCallIntPrimaryCallReceiverCallIntentProcessorNewOutgoingCallICallsManagerCallCreateConnecConnectionSeConnectionServiceTelephonyConnPhoneCallTrackerRIL

接收来电的处理过程

SubscriptionManager本身就是一个service
registerService(Context.TELEPHONY_SUBSCRIPTION_SERVICE, SubscriptionManager.class,）

PhoneAppTelephonyGlobalsTelecomAccoSubscriptionManagerTelephonyRegistryTelephonyManagernewonCreatesetupOnBootaddOnSubscriptionsChangedListeneraddOnSubscriptionsChangedListenerlistenlistenForSubscriberPhoneAppTelephonyGlobalsTelecomAccoSubscriptionManagerTelephonyRegistryTelephonyManager

之后就开始监听消息。

TelephonyRegistryTelecomAccountRegTelecomAccoAccountEntryPstnIncomingPhonePstnPhoneCapabonSubscriptionsChangedsetupAccountsnewTelephonyConnectionServicenewregistEVENT_NEW_RINGING_CONNECTION EVENT_CDMA_CALL_WAITINGEVENT_UNKNOWN_CONNECTIONnewTelephonyRegistryTelecomAccountRegTelecomAccoAccountEntryPstnIncomingPhonePstnPhoneCapab

当有新的call之后处理

GsmCallTrackerPhoneBasePstnIncomingTelecomManagerTelecomServiceImplCallIntentProcessorCallsManagerCallCreateConnecConnectionSerConnectionSeBinder2ServiceBindTelephonyConnConnectionServicenotifyNewRingingConnectionPhandleNewRingingConnectionaddNewIncomingCalladdNewIncomingCallnew Intent(TelecomManager.ACTION_INCOMING_CALL)processIncomingCallIntentprocessIncomingCallIntentnew CallstartCreateConnectionprocessattemptNextPhoneAccountgetServicenew ConnectionServiceWrappercreateConnectionbindnewbindServiceonServiceConnectedsetServiceInterfaceaddConnectionServiceAdapterMSG_ADD_CONNECTION_SERVICE_ADAPTERGsmCallTrackerPhoneBasePstnIncomingTelecomManagerTelecomServiceImplCallIntentProcessorCallsManagerCallCreateConnecConnectionSerConnectionSeBinder2ServiceBindTelephonyConnConnectionService

这里面需要注意，bind的Service为：TelephonyConnectionService

TelephonyConnConnectionServiceConnectionSeCallMSG_CREATE_CONNECTIONcreateConnectiononCreateUnknownConnectionhandleCreateConnectionCompletehandleCreateConnectionSuccessTelephonyConnConnectionServiceConnectionSeCall

之后就是调用UI注册进来的listener用来更新UI了。