frameworks\base\telephony\java\com\android\internal\telephony\
DataConnectionTracker.java
->[enableApnType() -> setEnabled() -> handleMessage -> case EVENT_ENABLE_NEW_APN -> onEnableApn()]
{这里稍微解释下, CDMAPhone ,GSMPhone 都是继承 PhoneBase. 而DataConnectionTracker 是PhoneBase 的一个成员字段,该对象的初始化分别是在CDMAPhone ,GSMPhone 类里,对应CdmaDataConnectionTracker, GsmDataConnectionTracker ,因为此二类分别继承DataConnectionTracker,所以具体是调用那个类的函数,要根据前面传进的是CDMAPhone 或者GSMPhone ,这个流程以GSMPhone 示例。}
frameworks\base\telephony\java\com\android\internal\telephony\gsm\
GsmDataConnectionTracker .java extends DataConnectionTracker
->[onEnableNewApn() -> cleanUpConnection() -> conn.disconnect(obtainMessage(EVENT_DISCONNECT_DONE, reason))]
frameworks\base\telephony\java\com\android\internal\telephony\
DataConnectionTracker.java
->[handleMessage ->case EVENT_DISCONNECT_DONE -> onDisconnectDone()]
frameworks\base\telephony\java\com\android\internal\telephony\gsm\
GsmDataConnectionTracker.java
->[onDisconnectDone() -> trySetupData(reason) -> setupData(reason)]
frameworks\base\telephony\java\com\android\internal\telephony\
DataConnection.java
->[processMessage -> case EVENT_CONNECT -> onConnect(cp)]
frameworks\base\telephony\java\com\android\internal\telephony\gsm\
GsmDataConnection .java
->[phone.mCM.setupDataCall()]
{phone.mCM 类型为CommandsInterface,也是根据CMDAPhone 或者GSMPhone 决定的,那么两者都是RIL 的实例,RIL implements CommandsInterface , 其实是根据RIL的构造函数,根据参数int networkMode 来决定。 注意:如果是Sip 就另当别论了,那么phone.mCM 就是通过SipPhoneBase 构造函数传给父类PhoneBase的构造函数,参数CommandsInterface,其实现 SipCommandInterface ,因为SipPhoneBase implements Phone, SipCommandInterface implements CommandsInterface }
RIL
->[setupDataCall()]
到这里, java层的pppd请求就通过RIL发到C层了。
所调用的框架图: