Exception : No such proxy method: AndroidUtilitiesPlugin+a.onButtonTapped(System.Int32)

Unity Engine
1

Hi,
I’m facing this problem with my android plugin since a udpate to the last version of unity.

Java code

public class AndroidBox  {
   private static final AndroidBox ourInstance = new AndroidBox();
   public static Activity mainActivity;
   private static final String LOGTAG = "AndroidBox";

   public static AndroidBox getInstance()
  {
     return ourInstance;
  }
 
   public interface AlertViewCallback {
        public void onButtonTapped(int id);
        public void testCallback(String test);
   }
   public void testCallback(AlertViewCallback callback){
        callback.testCallback(("test callback"));
   }
   public void showAlertView(String[] strings,final  AlertViewCallback callback)
   {
        if (strings.length<3)
        {
            Log.i(LOGTAG,"Error - expected at least 3 strings, got " + strings.length);
            return;
        }
        DialogInterface.OnClickListener myClickListener = new DialogInterface.OnClickListener() {
        @Override
         public void onClick(DialogInterface dialogInterface, int id) {
                Log.i(LOGTAG, "Tapped: " + id);
                callback.onButtonTapped(id);
                dialogInterface.dismiss();
          }
        };

        AlertDialog alertDialog = new AlertDialog.Builder(mainActivity)
                .setTitle(strings[0])
                .setMessage(strings[1])
                .setCancelable(false)
                .create();
        alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL,strings[2],myClickListener);
        if (strings.length>3)
            alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE,strings[3],myClickListener);
        if (strings.length>4)
            alertDialog.setButton(AlertDialog.BUTTON_POSITIVE,strings[4],myClickListener);
        alertDialog.show();
  }
}

c# code

public class AndroidUtilitiesPlugin : MonoBehaviour
{
    private AndroidJavaClass _pluginAndroidBoxClass;
    private AndroidJavaObject _pluginAndroidBoxInstance;
    private void Start()
    {
        ShowAlertDialog(new string[] { "test","test","ok"});   
    }
    public AndroidJavaClass PluginAndroidBoxClass
    {
        get
        {
            if (_pluginAndroidBoxClass == null)
            {
                _pluginAndroidBoxClass = new AndroidJavaClass(pluginAndroidPath + ".AndroidBox");
                _pluginAndroidBoxClass.SetStatic<AndroidJavaObject>("mainActivity", activity);
            }
            return _pluginAndroidBoxClass;
        }
    public AndroidJavaObject PluginAndroidBoxInstance
    {
        get
        {
            if (_pluginAndroidBoxInstance == null)
            {
                _pluginAndroidBoxInstance = PluginAndroidBoxClass.CallStatic<AndroidJavaObject("getInstance");
            }
            return _pluginAndroidBoxInstance;
        }
    }
    public AndroidJavaClass PluginAndroidBoxClass
    {
        get
        {
            if (_pluginAndroidBoxClass == null)
            {
                _pluginAndroidBoxClass = new AndroidJavaClass(pluginAndroidPath + ".AndroidBox");
                _pluginAndroidBoxClass.SetStatic<AndroidJavaObject>("mainActivity", activity);
            }
            return _pluginAndroidBoxClass;
        }
    }
 class AlertViewCallback : AndroidJavaProxy
    {
        private System.Action<int> alertHandler;
        public AlertViewCallback(System.Action<int> alertHandlerIn) : base(pluginAndroidPath + ".AndroidBox$AlertViewCallback")
        {
            alertHandler = alertHandlerIn;
        }
        public void onButtonTapped(int index)
        {
            Debug.Log("Button tapped: " + index);
            if (alertHandler != null) alertHandler(index);
        }
        public void testCallback(string test)
        {
            Debug.Log(test);
        }
    }
    public void ShowAlertDialog(string[] strings, System.Action<int> handler = null)
    {
        if (strings.Length < 3)
        {
            Debug.LogError("AlertView requires at least 3 strings");
            return;
        }

        if (Application.platform == RuntimePlatform.Android)
            PluginAndroidBoxInstance.Call("showAlertView", new object[] { strings, new AlertViewCallback(handler) });
        else
            Debug.LogWarning("AlertView not supported on this platform");
    }
}

When calling the ShowAlertDialog the alert dialog is working fine but now when I click on one button a have the error :
Create Thread: Exception : No such proxy method: AndroidUtilitiesPlugin+a.onButtonTapped(System.Int32)

So it’s on the callback of onButtonTapped, but why? Before, I never had that error.

2

Are you using mono or il2cpp?
On il2cpp you may need to explicitly mark your class so that methods don’t get stripped.

3

Ok thank you for your fast response, I’m using il2cpp but do you have an example for me ?

And in the “a.onButtonTapped” what is the “a” ?

And the problem is only with the alerDialog in that part of the code:

  • public void onClick(DialogInterface dialogInterface, int id) {

  • Log.i(LOGTAG, "Tapped: " + id);

  • callback.onButtonTapped(id); <----------------

  • dialogInterface.dismiss();

  • }

4

Ok I find why… I use a plugin (Obfuscator) to obfuscate the code… :rage:
Thank you for your time !:smile: