unity3d与android或IOS 通信

Android：

C#：
AndroidJaveClass plugin = new AndroidJavaClass("com.tXXXXXXXXXEntity");
plugin.CallStatic("trackEvent", category, action, label, score);

JAVA:
public static void trackEvent(

final String category,
final String action,
final string label,
final int score)
{
XXXXXXX;
}

IOS:

C#:
[DllImprot("__Internal")]
private static extern void _GoogleAnalyicsTrackEvent(
string category,
string action,
string label,
int score);

Objective-c:
extern "C" void _GoogleAnalyicsTrackEvent(
const char * category,
const char * action,
const char * label,
int score)
{
NSError *error;
if(![]).........
}

直接调用Dll:
[DllImport("sqlite3.dll", entryPoint = "sqlite_open")]
internal static extern int sqlite3_open(string filename, out IntPtr db);