手机音量API使用方法

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文章信息

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代码示例

源文件: Media:CRKeysCntrlPhVol.zip Media:Ear Lound switch speakers.zip

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平台安全性

需要的签名: Self Signed

能力: WriteUserData

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文章

翻译:

翻译自: CR Keys To Control Phone Volume API

由 hoolee

最后由 hamishwillee 在 22 Dec 2011 编辑

Note: 此API不是公开SDK的一部分，可以在SDK API Plug-in这里找到

目的

CR keys To Control Phone Volume API提供按键可以在通话时控制手机音量。

使用案例

- KTelephonyIncallEarVolume和KTelephonyIncallLoudspeakerVolume CR keys可以用来增加或减少通话时手机音量。

示例代码

头文件:

#include <telephonyinternalcrkeys_partner.h> //CR Keys To Control Phone Volume 
#include <centralrepository.h> //CRepository

链接库:

centralrepository.lib  //CRepository

所需能力

CAPABILITY    WriteUserData  //required for Setting the Volume:

//Telephony Call Handling Persistent Info API. 
//This API provides information related to call handling.
const TUid KCRUidCallHandling = {0x101F8784};
 
//Used by phone application, which contains the integer value 
//of Incall in ear piece betweeen 1-10.
const TUint32 KTelephonyIncallEarVolume = 0x00000001;
 
//Used by phone application, which contains the integer value 
//of Incall in Loud speaker betweeen 1-10.
const TUint32 KTelephonyIncallLoudspeakerVolume = 0x00000002;

手机耳机和扬声器的来电音量可以通过CRepository.的Get()方法和Set()方法传递"KTelephonyIncallEarVolume"和"TelephonyIncallLoudspeakerVolume"两个参数来控制。

//To create a CRepository object for accessing Phone Volume repository:
iRepository = CRepository::NewL(KCRUidCallHandling);

下列代码可以获得通话时耳机音量:

TBuf<3> lBufVol;
TInt lVol;
User::LeaveIfError(iRepository->Get(KTelephonyIncallEarVolume,lVol));
lBufVol.AppendNum(lVol);
CEikonEnv::InfoWinL(_L("Phone Incall Ear Volume:"),lBufVol);

下列代码可以获得通话时扬声器音量:

TBuf<3> lBufVol;
TInt lVol;
User::LeaveIfError(iRepository->Get(KTelephonyIncallLoudspeakerVolume, lVol));
lBufVol.AppendNum(lVol);
CEikonEnv::InfoWinL(_L("Phone Incall Loud Speaker Volume:"),lBufVol);

下列代码可以设置耳机或扬声器的音量:

TInt lVol = 6;
TInt lErr = iRepository->Set(KTelephonyIncallEarVolume,lVol);
TBuf<10> lBufErr;
lBufErr.AppendNum(lErr);
if ( lErr == KErrNone )
  {
  CEikonEnv::InfoWinL(_L("Phone Ear Volume Set:"),_L("Successful"));
  }
else
  {
  CEikonEnv::InfoWinL(_L("Phone Ear Volume Set Err:"),lBufErr);
  }
 
lBufErr.Zero();
lErr = iRepository->Set(KTelephonyIncallLoudspeakerVolume,lVol);
lBufErr.AppendNum(lErr);
 
if ( lErr == KErrNone )
  {
  CEikonEnv::InfoWinL(_L("Phone Loud Speaker Volume Set:"),_L("Successful"));
  }
else
  {
  CEikonEnv::InfoWinL(_L("Phone Loud Speaker Vol Set Err:"),lBufErr);
  }

示例代码下载

File:CRKeysCntrlPhVol.zip

File:Ear Lound switch speakers.zip