手机拨打电话

手机拨打电话在symbian8版之后比较简单。但是CSDN和SDK上说明都不太清晰。SDK关于拨打电话有例程（S60 3rd fp1）：Symbian os v9.2->system OS guide->Telephony->Using the Telephony ISV API->How to dial a call。本文章也是此依据。

#include <e32base.h>#include <Etel3rdParty.h>_LIT(KTheNumber, "123456789");class CClientApp : public CActive { private: CTelephony* iTelephony; CTelephony::TCallId iCallId;public: CClientApp(CTelephony* aTelephony); void SomeFunction();private: /* These are the pure virtual methods from CActive that MUST be implemented by all active objects */ void RunL(); void DoCancel(); };CClientApp::CClientApp(CTelephony* aTelephony) : CActive(EPriorityStandard), iTelephony(aTelephony) { //default constructor }void CClientApp::SomeFunction() { CTelephony::TTelNumber telNumber(KTheNumber); CTelephony::TCallParamsV1 callParams; callParams.iIdRestrict = CTelephony::ESendMyId; CTelephony::TCallParamsV1Pckg callParamsPckg(callParams); iTelephony->DialNewCall(iStatus, callParamsPckg, telNumber, iCallId); SetActive(); }void CClientApp::RunL() { if(iStatus==KErrNone) {} // The call has been dialled successfully; // iCallId contains the call's ID, needed when controlling the call. }void CClientApp::DoCancel() { iTelephony->CancelAsync(CTelephony::EDialNewCallCancel); } 

需要的库为Etel3rdParty.lib。

但是本例程有个问题，就是关于iTelephony的初始化的。本例程的初始化是通过构造函数传入的。没有说明其初始化。其实可以更改如下：

#include <e32base.h>#include <Etel3rdParty.h>_LIT(KTheNumber, "123456789");class CClientApp : public CActive { private: CTelephony* iTelephony; CTelephony::TCallId iCallId;public: CClientApp(); void SomeFunction();private: /* These are the pure virtual methods from CActive that MUST be implemented by all active objects */ void RunL(); void DoCancel(); };CClientApp::CClientApp() : CActive(EPriorityStandard) { //default constructor }void CClientApp::SomeFunction() { if(iTelephony == NULL ) { iTelephony = CTelephony::NewL(); } CTelephony::TTelNumber telNumber(KTheNumber); CTelephony::TCallParamsV1 callParams; callParams.iIdRestrict = CTelephony::ESendMyId; CTelephony::TCallParamsV1Pckg callParamsPckg(callParams); iTelephony->DialNewCall(iStatus, callParamsPckg, telNumber, iCallId); SetActive(); }void CClientApp::RunL() { if(iStatus==KErrNone) { delete iTelephony; iTelephony = NULL; } // The call has been dialled successfully; // iCallId contains the call's ID, needed when controlling the call. }void CClientApp::DoCancel() { iTelephony->CancelAsync(CTelephony::EDialNewCallCancel); } 

这样，就添加了iTelephony的初始化。