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CF.Skills C#如何通过RLL获取基站信息
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。
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
