[CF.Skills]C#中如何通过RIL获得基站信息

在Windows Mobile的手机上面, RIL提供了访问Radio模块的接口, 下面以一个简单的示例说明如何在C#中通过RIL获得基站信息.

第一步. 定义必要的数据结构和回调函数

1. 包含基站信息的RILCELLTOWERINFO类

public class RILCELLTOWERINFO

{

public uint cbSize;

public uint dwParams;

public uint dwMobileCountryCode;//中国的MCC为460

public uint dwMobileNetworkCode;

public uint dwLocationAreaCode;

public uint dwCellID;

public uint dwBaseStationID;

public uint dwBroadcastControlChannel;

public uint dwRxLevel;

public uint dwRxLevelFull;

public uint dwRxLevelSub;

public uint dwRxQuality;

public uint dwRxQualityFull;

public uint dwRxQualitySub;

public uint dwIdleTimeSlot;

public uint dwTimingAdvance;

public uint dwGPRSCellID;

public uint dwGPRSBaseStationID;

public uint dwNumBCCH;

}

2.用于异步返回RIL调用结果的回调函数RILRESULTCALLBACK

public delegate void RILRESULTCALLBACK(uint dwCode,

IntPtr hrCmdID,

IntPtr lpData,

uint cbData,

uint dwParam);

3.在RIL主动发出notify的时候回调的提醒函数RILNOTIFYCALLBACK

public delegate void RILNOTIFYCALLBACK(uint dwCode,

IntPtr lpData,

uint cbData,

uint dwParam);

注意：这个提醒函数后面不会用到，但它是作为必要的Native函数的参数，在pinvoke的时候是不可缺少的

第二步. 通过pinvoke引用必要的RIL Native函数

RIL_Initialize ， RIL_GetCellTowerInfo，RIL_Deinitialize

[DllImport("ril.dll")]

private static extern IntPtr RIL_Initialize(uint dwIndex,

RILRESULTCALLBACK pfnResult,

RILNOTIFYCALLBACK pfnNotify,

uint dwNotificationClasses,

uint dwParam,

out IntPtr lphRil);

[DllImport("ril.dll")]

private static extern IntPtr RIL_GetCellTowerInfo(IntPtr hRil);

[DllImport("ril.dll")]

private static extern IntPtr RIL_Deinitialize(IntPtr hRil);

第三步. 通过RIL_GetCellTowerInfo获取基站信息

1.初始化一个RIL的实例并返回它的Handle

hRes = RIL_Initialize(1, // RIL port 1

new RILRESULTCALLBACK(rilResultCallback), // 返回调用结果的回调函数

null, 0, 0,

out hRil); //返回RIL实例的handle

2.定义回调函数

        private static AutoResetEvent waithandle = new AutoResetEvent(false);

        public static void rilResultCallback(uint dwCode,
                                             IntPtr hrCmdID,
                                             IntPtr lpData,
                                             uint cbData,
                                             uint dwParam)
        {
            //构造一个RILCELLTOWERINFO类用于存放数据
             rilCellTowerInfo = new RILCELLTOWERINFO();
            Marshal.PtrToStructure(lpData, rilCellTowerInfo);

            //回调通知
            waithandle.Set();}

3.调用RIL_GetCellTowerInfo并释放当前RIL实例的handle

RIL_GetCellTowerInfo(hRil);

//等待回调函数返回

waithandle.WaitOne();

//释放RIL handle

RIL_Deinitialize(hRil);

结果与分析：

以下是在samsungi718+上的测试结果：

-rilCellTowerInfo ：
  cbSize 2164262660 uint
  dwBaseStationID 706412084 uint
  dwBroadcastControlChannel 0 uint
  dwCellID 0 uint //其实这里的cellid在我机器上获取不到，确实非常遗憾
  dwGPRSBaseStationID 706412084 uint
  dwGPRSCellID 158440 uint
  dwIdleTimeSlot 33993204 uint
  dwLocationAreaCode 706412076 uint
  dwMobileCountryCode 0 uint //这个MCC中国应该是460，我这里也没有获取到
  dwMobileNetworkCode 33993204 uint
  dwNumBCCH 706411928 uint
  dwParams 0 uint
  dwRxLevel 4 uint
  dwRxLevelFull 0 uint
  dwRxLevelSub 706412004 uint
  dwRxQuality 706411908 uint
  dwRxQualityFull 158172 uint
  dwRxQualitySub 67853664 uint
  dwTimingAdvance 0 uint

需要注意的是这里的CellTowerInfo在各个机型上面的实现程度不一样，文中提到的RIL相关函数严格来说在Windows Mobile 上面都不是必须被实现的，使用时需考虑到这一点。