java - 静态类的列表数组始终返回相同的值

我正在尝试填写数组的静态列表。RTTWifiPositionsToJavaUnity（C＃）使用此函数传递每个WifiPosition的参数。但是列表中的每个项目都m_RTTWifiPositions具有与上次增加的值相同的值。
有人可以帮忙吗，谢谢:)

static class RTTWifiPos
{  
    static String strMacAddress;
    static double posX, posY, posZ;
    static double distance; 
    static double distanceDev;
}

static List<RTTWifiPos> m_RTTWifiPositions;

public static boolean RTTWifiPositionsToJava(int nIndex, String strMacAddress, double PosX, double PosY, double PosZ, double distance, double distanceStdDev)
{  
    if(nIndex == 0)
    {
       if(m_RTTWifiPositions != null)  
            m_RTTWifiPositions.clear();
       else
            m_RTTWifiPositions = new ArrayList<RTTWifiPos>();
    }
    RTTWifiPos rttpos = new RTTWifiPos();

    rttpos.strMacAddress = strMacAddress;
    rttpos.posX = PosX;
    rttpos.posY = PosY;
    rttpos.posZ = PosZ;
    rttpos.distance = distance;
    rttpos.distanceDev = distanceStdDev;

    m_RTTWifiPositions.add(rttpos);

    return true;
}

该函数RTTWifiPositionsToJava是从Unity3D调用的，如下所示：

for (nIndex = 0; nIndex < WifiRTTSignals.Count; nIndex++)
{
    result = m_pluginWifiRTTClass.CallStatic<bool>("RTTWifiPositionsToJava", nIndex, WifiRTTSignals[nIndex].macAddress, (double) WifiRTTSignals[nIndex].pos.x, (double) WifiRTTSignals[nIndex].pos.y, (double) WifiRTTSignals[nIndex].pos.z, (double) WifiRTTSignals[nIndex].distance, (double) 0f);
}