Phone的继承关系与PhoneFactory(GsmCdmaPhone、ImsPhone、SipPhone)
Phone进程的启动
Phone对象的初始化(DefaultPhoneNotifier和RIL对象,将作为创建GsmCdmaPhone参数)
为Phone实例注册监听事件(CM,注册与注销)
Phone有什么作用(监听、上报消息、modem交互)
Android中有三种PhoneFactory: PhoneFactory.java ——–>用于创建GsmCdmaPhone对象; ImsPhoneFactory.java ——–>用于创建ImsPhone对象; SipPhoneFactory.java ——–>用于创建SipPhone对象。 其中,GsmCdmaPhone对象是在Phone进程启动之后创建的(步骤1~6);之后,等到ImsService启动之后,就会创建ImsPhone(步骤7~11)。
在Android中进程名一般对应的是该APP的包名,所以我们可以在源码中找package=”com.android.phone”。 接着你就会在/packages/services/Telephony/AndroidManifest.xml文件中看到:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
package="com.android.phone"
coreApp="true"
android:sharedUserId="android.uid.phone"
android:sharedUserLabel="@string/phoneAppLabel" >
<application android:name="PhoneApp"
//在系统启动之时,ActivityManagerService的systemReady() 会加载所有persistent为true的应用
android:persistent="true"
android:label="@string/phoneAppLabel"
android:icon="@mipmap/ic_launcher_phone"
android:allowBackup="false"
android:supportsRtl="true"
android:usesCleartextTraffic="true">
在PhoneFactory.java的makeDefaultPhone方法中(时序图中的步骤3)
public static void makeDefaultPhone(Context context) { ...... //创建DefaultPhoneNotifier对象。 sPhoneNotifier = new DefaultPhoneNotifier(); //根据待机模式计算出要创建Phone对象的数量 int numPhones = TelephonyManager.getDefault().getPhoneCount(); //创建networkMode、PhoneProxy、RIL的数组,用于存储对应的对象 int[] networkModes = new int[numPhones]; //Android 6.0 //sProxyPhones = new PhoneProxy[numPhones]; //Android N中没有了PhoneProxy,所以通过getDefaultPhone()得到的就是Phone实例 sPhones = new Phone[numPhones]; sCommandsInterfaces = new RIL[numPhones]; for (int i = 0; i < numPhones; i++) { // reads the system properties and makes commandsinterface // Get preferred network type. networkModes[i] = RILConstants.PREFERRED_NETWORK_MODE; Rlog.i(LOG_TAG, "Network Mode set to " + Integer.toString(networkModes[i])); //创建RIL,此时的i对应的是PhoneID。 sCommandsInterfaces[i] = new RIL(context, networkModes[i], cdmaSubscription, i); } ...... for (int i = 0; i < numPhones; i++) { Phone phone = null; //根据不用的类型,创建不同的Phone对象 int phoneType = TelephonyManager.getPhoneType(networkModes[i]); if (phoneType == PhoneConstants.PHONE_TYPE_GSM) { phone = new GsmCdmaPhone(context, sCommandsInterfaces[i], sPhoneNotifier, i, PhoneConstants.PHONE_TYPE_GSM, //Android N中新增TelephonyComponentFactory类,主要用来 //初始化CallTracker、ServiceStateTracker、DcTracker等对象 TelephonyComponentFactory.getInstance()); } else if (phoneType == PhoneConstants.PHONE_TYPE_CDMA) { phone = new GsmCdmaPhone(context, sCommandsInterfaces[i], sPhoneNotifier, i, PhoneConstants.PHONE_TYPE_CDMA_LTE, TelephonyComponentFactory.getInstance()); } Rlog.i(LOG_TAG, "Creating Phone with type = " + phoneType + " sub = " + i); sPhones[i] = phone; } ..... // Start monitoring after defaults have been made. // Default phone must be ready before ImsPhone is created // because ImsService might need it when it is being opened. for (int i = 0; i < numPhones; i++) { //开始监听ImsService,如果ImsService已启动,进而执行创建ImsPhone对象 sPhones[i].startMonitoringImsService(); } }
PhoneGlobals.java的onCreate()方法中
public void onCreate() { if (mCM == null) { // Initialize the telephony framework //先创建Phone实例 PhoneFactory.makeDefaultPhones(this); mCM = CallManager.getInstance(); for (Phone phone : PhoneFactory.getPhones()) { //把新创建的Phone实例传递进来 mCM.registerPhone(phone); } } }
由CallManager来管理这些Phone实例并且为它们注册监听事件。
// list of registered phones, which are PhoneBase objs private final ArrayList<Phone> mPhones; public boolean registerPhone(Phone phone) { Phone basePhone = getPhoneBase(phone); if (basePhone != null && !mPhones.contains(basePhone)) { if (DBG) { Rlog.d(LOG_TAG, "registerPhone(" + phone.getPhoneName() + " " + phone + ")"); } if (mPhones.isEmpty()) { mDefaultPhone = basePhone; } //管理Phone实例 mPhones.add(basePhone); mRingingCalls.add(basePhone.getRingingCall()); mBackgroundCalls.add(basePhone.getBackgroundCall()); mForegroundCalls.add(basePhone.getForegroundCall()); //为Phone实例注册监听事件 registerForPhoneStates(basePhone); return true; } return false; } private void registerForPhoneStates(Phone phone) { ...... phone.registerForDisconnect(handler, EVENT_DISCONNECT,mRegistrantidentifier); phone.registerForIncomingRing(handler, EVENT_INCOMING_RING,mRegistrantidentifier); ...... }
回忆第2小节创建GsmCdmaPhone对象时
sPhoneNotifier = new DefaultPhoneNotifier(); sCommandsInterfaces[i] = new RIL(context, networkModes[i], cdmaSubscription, i); phone = new GsmCdmaPhone(context, sCommandsInterfaces[i], sPhoneNotifier, i, PhoneConstants.PHONE_TYPE_GSM, TelephonyComponentFactory.getInstance());
先初始化了DefaultPhoneNotifier和RIL对象,将它们作为参数,再创建GsmCdmaPhone。 所以在GsmCdmaPhone中可以直接操纵这两个对象的方法。 DefaultPhoneNotifier实现了PhoneNotifier接口,PhoneNotifier接口中定义了很多notifyXXX的接口,所以DefaultPhoneNotifier主要的作用就是上报消息
public interface PhoneNotifier { public void notifyPhoneState(Phone sender); public void notifyServiceState(Phone sender); ... }
而RIL对象主要作用是跟modem交互。 因此,Phone实例就间接地拥有了跟modem交互的能力和上报消息的能力,再加上Phone实例自身就有监听事件的能力,所以Phone的作用就是: 1.注册监听事件,及时上报消息(Call状态变化、Service状态变化、新来电等等) 2.间接地为其他类提供跟modem交互的服务。
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