How can I pass arguments to Java with AndroidJavaObject.Call?

Question

So i've integrated my project with eclipse and make calls to my Java classes through C# calls:

AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity");
jo.Call("Trigger");

Now providing I dont try to pass any arguments along with the Trigger method call, it calls the method perfectly. However, if i try to pass the variable through as follows:

jo.Call("Trigger", "my string");

The unity engine thinks the mystring arg is referring to the signature type of the method being called. How can i pass variables through along to my Java method?

On top of this, how do i return variables from java to C#? Would it be as simple as

String myString = jo.Call("Trigger");

Thanks for the help in advance!

filipst · Accepted Answer · 2014-10-22 13:43:54Z

3

Try doing it like this. It is working for me:

using(AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
{
     using(AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity"))
     {
          jo.Call("Trigger", "my string");
     }
}

And then in Eclipse you do:

void Trigger(String message)
{
     if(message=="my string")...
}

Sending variable from java to C#: In eclipse you do:

UnityPlayer.UnitySendMessage("Android", "ReceiveVar", "some string");

Where "Android" is Script containing "ReceiveVar(string str)" function, and "some string" is your variable (this is Unity part).

answered Oct 22, 2014 at 13:43

filipst

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