How to call a Java method with a parameter?

My Unity code:

Code (CSharp):

1. // to get the activity
2. AndroidJavaClass androidJC = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
3. AndroidJavaObject jo = androidJC.GetStatic<AndroidJavaObject>("currentActivity");
4. // Accessing the class to call a static method on it
5. AndroidJavaClass jc = new AndroidJavaClass("com.lf.clientsampleapp.MainActivity");
6. // Calling a Call method to which the current activity is passed
7. jc.CallStatic("Call", jo);

My plugins Java code:

Code (Java):

1. public class MainActivity extends UnityPlayerActivity
2. {
3.     public static void Call(Activity activity)
4.     {
5.         // Creating an intent with the current activity and the activity we wish to start
6.         Intent myIntent = new Intent(activity, MainActivity.class);
7.         activity.startActivity(myIntent);
8.     }
9.  
10.     public static void Call()
11.     {
12.         //Calling this method without a parameter works fine...
13.     }
14.  
15.  

This produces a NoSuchMethod exception. But if I call the same method without a parameter from Unity using

Code (CSharp):

1. jc.CallStatic("Call")

it works fine. So, there is some mapping issue with the parameter.

I tried other variants, like

Code (CSharp):

1. jc.CallStatic("Call", new object[] { jo });

But still no go... How do I do this?

 

Is this really impossible..?

 

Just a NoSuchMethod exception... I have tried to call other methods with string parameters, and then it works. But the activity object won't map..

 

I have a similar problem.
I'm making a Unity wrapper for an Android library and I need to take an instance of a class that is defined inside the library, save it, and later, send it back as a parameter for a library method. I have no choice but to save it as an AndroidJavaObject. Could this be a problem when I try to pass it as a parameter? How can I solve this?