[Solved]Unity Call Java non static method error,Search for google infomation but does not solve

Unity Engine
1

Hello,everyone.The problem is this, I can call the static function but can not call non-static function.
My Java code：

public class Main extends UnityPlayerActivity {

    public static Context mContext;
   @override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mContext=this;
   
        Log.d("Unity", "OnCreate...........");
    }
    public int nonIntFunc(int a,int b)
    {
        Log.d("Unity", "Call non IntFunc...........");
        return a+b;
    }
   }

My Unity Code：

void Start () {

        Debug.Log("1->start.....");
 
        jc = new AndroidJavaClass("com.panda.easyvr.Main");

        jo = jc.GetStatic<AndroidJavaObject>("mContext");

        int m = jo.Call<int>("nonIntFunc", new object[] { 3, 2 });
   
        Debug.Log("Call end! ->"+m);
   
    }

debug log message is always show m value is 0.
I have spent several hours, but the problem is still not resolved. Any available information very grateful!

2217539--147589--001.png
2217539--147589--001.png933×337 4.6 KB

2

Use code tags or no one’s going to bother even trying to read that.

3

Thank you!:wink:

4

int m=jo.Call(“nonIntFunc”,2,3);

5

Thank you JFo, I will try!

6

Hello,JFo. when jo = jc.GetStatic(“mContext”); find logcat error message"
Exception: JNI: Init’d AndroidJavaObject with null ptr! ", can you tell me how to modify ? Thank you .

7

It looks like you’re trying to call nonIntFunc on jo, which is the mContext field, which is a Context object. So that function doesn’t exist. You should be calling it on jc, which is the Main class.

8

Thanks makeshiftwings. change code to:

public class Test : MonoBehaviour {

    AndroidJavaClass jc;
    AndroidJavaObject jo;

    void Start () {

        Debug.Log("1->start.....");
    
        jc = new AndroidJavaClass("com.panda.easyvr.Main");

        //jo = jc.GetStatic<AndroidJavaObject>("mContext");

        int m = jc.Call<int>("nonIntFunc", 2, 3);
       
        Debug.Log("Call end! ->"+m);
      
    }
}

always return m is 0,the logcat message show “I/Unity (32166): Call end! ->0”; :frowning:

9

Oh, I think you also want to use AndroidJavaObject rather than AndroidJavaClass for “Main” as well:

AndroidJavaObject jc;
//.........stuff.....
jc = new AndroidJavaObject("com.panda.easyvr.Main");
//...more stuff...
10

th

thanks，but logcat show error message“I/Unity ( 1436): AndroidJavaException: java.lang.RuntimeException: Can’t create handler inside thread that has not called Looper.prepare()”