DcTracker和DefaultPhoneNotifier的联系

一、主要联系

当数据连接变化时数据图标的刷新过程，主要有这几步：

Step 1：DcTracker::notifyDataConnection  遍历各个apn类型，分别发送通知到phone;Step 2：Phonebase::notifyDataConnection  通知到notifier;Step 3：DefaultPhoneNotifier::notifyDataConnection  调用doNotifyDataConnection；Setp 4：DefaultPhoneNotifier::doNotifyDataConnection  调用notifyDataConnectionForSubscriber；Step 5：TelephonyRegistry::notifyDataConnectionForSubscriber  调用onDataConnectionStateChanged。

二、具体代码调用

2.1 DcTracker：

public class DcTracker extends DcTrackerBase；protected void notifyDataConnection(String reason) {    if (DBG) log("notifyDataConnection: reason=" + reason);    for (ApnContext apnContext : mApnContexts.values()) {        if ((mAttached.get() || !mOosIsDisconnect) && apnContext.isReady()) {            if (DBG) log("notifyDataConnection: type:" + apnContext.getApnType());            mPhone.notifyDataConnection(reason != null ? reason : apnContext.getReason(),                    apnContext.getApnType());        }    }    notifyOffApnsOfAvailability(reason);}

2.2 DcTrackerBase：

protected PhoneBase mPhone;

2.3 PhoneBase：

public abstract class PhoneBase extends Handler implements Phonepublic void notifyDataConnection(String reason, String apnType,        PhoneConstants.DataState state) {    mNotifier.notifyDataConnection(this, reason, apnType, state);}

protected PhoneNotifier mNotifier;

2.4 DefaultPhoneNotifier：

public class DefaultPhoneNotifier implements PhoneNotifier

public void notifyDataConnection(Phone sender, String reason, String apnType,        PhoneConstants.DataState state) {    doNotifyDataConnection(sender, reason, apnType, state);}

2.4.1 doNotifyDataConnection：

protected ITelephonyRegistry mRegistry;

mRegistry.notifyDataConnectionForSubscriber();

2.5 TelephonyRegistry：

class TelephonyRegistry extends ITelephonyRegistry.Stub

notifyDataConnectionForSubscriber：r.callback.onDataConnectionStateChanged()

至此，不往下分析了.