Events not fired in Android Plugin

Android function not fired

Hi all,

I'm working on an Android Project on Unity and I am trying to use a Java SDK to manage Estimote beacons. I created an Android Lib on Android Studio and imported it in Unity. Unfortunately, my "onBeaconsDiscovered" is never fired..

Here is the code of my Android Library:

public class Helper {

  BeaconManager _m=null;
  public static void DoSthInAndroid()
  {
      Log.i("Unity", "Hi from Android");
  }
  public void setRangingMethodToManager(UnityPlayerNativeActivity c) throws InterruptedException {
      Log.d("Unity","TOUT AVANT");
      _m=new BeaconManager(c);
      Log.d("Unity","UN PEU APRES");
      _m.setRangingListener(new BeaconManager.RangingListener() {
          @Override
          public void onBeaconsDiscovered(Region region, List<Beacon> list) {
              Log.d("nouvelle balise !","new beacon discovered");
          }
      });
     
      Log.d("nouvelle balise !","APRES");
  }

}

I've compiled this code in Android Studio, and pasted the "classes.jar" created in Android/Plugin. Here is the way i used it on Unity :

using System.Collections; using System.Collections.Generic; using UnityEngine; public class NewBehaviourScript : MonoBehaviour {

  public AndroidJavaObject jo;
  public AndroidJavaObject jo2;
  public static AndroidJavaClass myClass2;
  public static AndroidJavaClass myClass3;
  public  AndroidJavaClass androidJC;
  void Start()
  {
      init();
  }
  public void init()
  {
       this.androidJC= new AndroidJavaClass("com.unity3d.player.UnityPlayer");
      this.jo = androidJC.GetStatic<AndroidJavaObject>("currentActivity");
      this.jo2 = new AndroidJavaObject("com.example.r_boug.myunitylib.Helper");
      // Calling a Call method to which the current activity is passed
      this.jo2.CallStatic("DoSthInAndroid");
      this.jo2.Call("setRangingMethodToManager", this.jo);
      this.jo2.CallStatic("DoSthInAndroid");
     
      //  Debug.Log("apres");
  }
  void OnGUI()
  {
     // init();
      if (GUI.Button(new Rect(10, 200, 150, 120), "SHOW INTENT"))
      {
          myClass2.CallStatic("DoSthInAndroid");
          this.jo.CallStatic("logOK");
      }
  }

}

My code is working and the "setRangingMethodToManager" function is fired, but I do not receive any display of "new beacon discovered". The code before and after this is executed(i can read the logs), but it seems as if events are not fired.. did I do something wrong ?

Thanks for your help !