1.在啟動系統一些服務的時候會執行一個startOtherServices的方法

frameworks/base/services/java/com/android/server/SystemServer.java

{

    try {

            Trace.traceBegin(Trace.TRACE_TAG_SYSTEM_SERVER,"StartServices");

            startBootstrapServices();

            startCoreServices();

            startOtherServices();

        }catch (Throwable ex) {

            Slog.e("System","******************************************");

            Slog.e("System","************ Failure starting system services", ex);

throw ex;

        }finally {

            Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);

        }

}

2.在startOtherServices方法內會啟動TelecomLoaderService

mSystemServiceManager.startService(TelecomLoaderService.class);

-------------------------------------------------------------------------------------------------------------------->

frameworks/base/services/core/java/com/android/server/telecom/TelecomLoaderService.java

/**

 * Starts thetelecom component by binding to its ITelecomService implementation. Telecom is setup

 * to run in the system-server process so once it is loaded into memory it will stay running.

 *@hide

 */

publicclass TelecomLoaderServiceextends SystemService {

@Override

publicvoid onBootPhase(int phase) {

if (phase == PHASE_ACTIVITY_MANAGER_READY) {

            registerDefaultAppNotifier();

            registerCarrierConfigChangedReceiver();

            connectToTelecom();

        }

    }

}

3.主要看connectToTelecom

privatevoid connectToTelecom() {

synchronized (mLock) {

if (mServiceConnection !=null) {

//TODO: Is unbinding worth doing or wait for system to rebind?

mContext.unbindService(mServiceConnection);

mServiceConnection =null;

            }

   TelecomServiceConnection serviceConnection =new TelecomServiceConnection();

            Intent intent =new Intent(SERVICE_ACTION);

            intent.setComponent(SERVICE_COMPONENT);

int flags = Context.BIND_IMPORTANT | Context.BIND_FOREGROUND_SERVICE

                    | Context.BIND_AUTO_CREATE;

// Bind to Telecom and register the service

if (mContext.bindServiceAsUser(intent, serviceConnection, flags, UserHandle.SYSTEM)) {

mServiceConnection = serviceConnection;

            }

        }

    }

4.而SERVICE_COMPONENT為

privatestaticfinal ComponentNameSERVICE_COMPONENT =new ComponentName(

"com.android.server.telecom",

"com.android.server.telecom.components.TelecomService");

這樣就綁定了TelecomService服務

5.

------------------------------------------------------------------->

packages/services/Telecomm/src/com/android/server/telecom/components/TelecomService.java

    @Override

public IBinder onBind(Intent intent) {

        Log.d(this,"onBind");

        initializeTelecomSystem(this);

synchronized (getTelecomSystem().getLock()) {

return getTelecomSystem().getTelecomServiceImpl().getBinder();

        }

    }

在 initializeTelecomSystem裡主要生成一個單例TelecomSystem

if (TelecomSystem.getInstance() == null) {

            TelecomSystem.setInstance(

new TelecomSystem(。。。)...

------------------------------------------------------------------->

在TelecomSystem的構造方法內會生成TeleCom的很多例項類並儲存到 TelecomServiceImpl類中

{

mPhoneAccountRegistrar =new PhoneAccountRegistrar(mContext);

 BluetoothManager bluetoothManager =new BluetoothManager(mContext,

new BluetoothAdapterProxy());

  WiredHeadsetManager wiredHeadsetManager =new  WiredHeadsetManager(mContext);

mMissedCallNotifier = missedCallNotifierImplFactory

                .makeMissedCallNotifierImpl(mContext,mPhoneAccountRegistrar);

        DefaultDialerManagerAdapter defaultDialerAdapter =

new TelecomServiceImpl.DefaultDialerManagerAdapterImpl();

mCallsManager =new CallsManager(

….........

mTelecomServiceImpl =new TelecomServiceImpl(...

}

而在mTelecomServiceImpl類中有ITelecomService的例項

privatefinal ITelecomService.StubmBinderImpl =new ItelecomService.Stub()

所以在 TelecomLoaderService繫結完TelecomService後 返回的是mBinderImpl

返回後會通過如下方法新增到系統服務類

ServiceManager.addService(Context.TELECOM_SERVICE, service);

所以上層可以通過mContext.getSystemService(Context.TELECOM_SERVICE)呼叫TelecomServiceImpl類呼叫相關介面

------------------------------------------------------------------->

packages/services/Telecomm/src/com/android/server/telecom/CallsManager.java

在生成TelecomServiceImpl中的時候 有一個很重要的類建立new CallsManager

在CallsManager的構造方法內會儲存很多監聽器用來控制撥打電話和來電和CallLog等電話邏輯操作的監聽器

{

mListeners.add(mInCallWakeLockController);

mListeners.add(statusBarNotifier);

mListeners.add(mCallLogManager);

mListeners.add(mPhoneStateBroadcaster);

mListeners.add(mInCallController);

mListeners.add(mCallAudioManager);

mListeners.add(missedCallNotifier);

mListeners.add(mHeadsetMediaButton);

mListeners.add(mProximitySensorManager);

}

{

privatefinal Set<CallsManagerListener>mListeners = Collections.newSetFromMap(

new ConcurrentHashMap<CallsManagerListener, Boolean>(16, 0.9f, 1));

}

------------------------------------------------------------------->

packages/services/Telephony/src/com/android/phone/PhoneApp.java

前面講完了如何啟動TelecomService的流程 現在講一下Telephony流程 在系統載入Telecom.apk的時候 會執行PhoneApp

/**

 * Top-level Application class for the Phone app.

 */

publicclass PhoneAppextends Application {

    PhoneGlobalsmPhoneGlobals;

    TelephonyGlobalsmTelephonyGlobals;

@Override

publicvoid onCreate() {

if (UserHandle.myUserId() == 0) {

// We are running as the primary user, so should bring up the

// global phone state.

mPhoneGlobals =new PhoneGlobals(this);

mPhoneGlobals.onCreate();

mTelephonyGlobals =new TelephonyGlobals(this);

mTelephonyGlobals.onCreate();//和PhoneAccountHandle賬戶管理有關

        }

    }

------------------------------------------------------------------->

這裡主要講下mPhoneGlobals.onCreate方法

frameworks/opt/telephony/src/java/com/android/internal/telephony/PhoneFactory.java

makeDefaultPhone

{

     for (int i = 0; i < numPhones; i++) {

// reads the system properties and makes commandsinterface

// Get preferred network type.

         //先獲取配置的手機支援網路型別

         networkModes[i] = RILConstants.PREFERRED_NETWORK_MODE;

 //intPREFERRED_NETWORK_MODE      =         //SystemProperties.getInt("ro.telephony.default_network",

//            NETWORK_MODE_WCDMA_PREF);

                    Rlog.i(LOG_TAG,"Network Mode set to " + Integer.toString(networkModes[i]));

sCommandsInterfaces[i] = new RIL(context, networkModes[i],

                            cdmaSubscription, i);

                }

//初始化SubscriptionController

SubscriptionController.init(context,sCommandsInterfaces);

// Instantiate UiccController so that all other classes can just

// call getInstance()

//初始化SIM卡框架

sUiccController = UiccController.make(context, sCommandsInterfaces);

//生成Phone物件

for (int i = 0; i < numPhones; i++) {

          Phone phone =null;

int phoneType = TelephonyManager.getPhoneType(networkModes[i]);

if (phoneType == PhoneConstants.PHONE_TYPE_GSM) {

                        phone =new GsmCdmaPhone(context,

sCommandsInterfaces[i],sPhoneNotifier, i,

                                PhoneConstants.PHONE_TYPE_GSM,

                                TelephonyComponentFactory.getInstance());

                    }elseif (phoneType == PhoneConstants.PHONE_TYPE_CDMA) {

                        phone =new GsmCdmaPhone(context,

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