Executing function on main thread from Android Plugin

Hi,

I'm actually developping a mobile app, which uses vocal recognition. To do this, i made an Android Library and imported it. Unfortunately, i can't use my vocal recognition functions because i have an error saying to me that:

 I/Unity: AndroidJavaException: java.lang.RuntimeException: SpeechRecognizer should be used only from the application's main thread

I've tried a lot of things and here is what i did:

The script from where i launch my java object:

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.Video; using UnityEngine.UI; using Newtonsoft.Json.Linq; using Vuforia;

public class TargetScript : MonoBehaviour, ITrackableEventHandler {

 //Attributs du script
 public AndroidJavaObject jo;
 public AndroidJavaObject jo2;
 public AndroidJavaObject voiceReco;
 public AndroidJavaClass androidJC;


 void Start()
 {
     init();

 }

 public void init()
 {
     this.androidJC = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
     this.jo = androidJC.GetStatic<AndroidJavaObject>("currentActivity");
     this.voiceReco = new AndroidJavaObject("com.example.r_boug.myunitylib.VoiceRecognition", this.jo);
     
 }


 void Update()
 {
    
 }

  

Here is my Android Plugin Java class used: (VoiceRecognition):

   package com.example.r_boug.myunitylib;
     
     import android.content.Context;
     import android.os.Handler;
     import android.speech.SpeechRecognizer;
     import android.util.Log;
     
     import com.vuzix.speech.Constants;
     import com.vuzix.speech.VoiceControl;
     
     /**
      * Created by r_boug on 02/05/2017.
      */
     
     public class VoiceRecognition  {
     
     
         private VoiceControl vc;
         public VoiceRecognition(Context context) {
          // super(context);
     //        super(context);
             Log.d("AFFICHAGE DU RESULTAT","FONCTION 1");
             // Get a handler that can be used to post to the main thread
     
             SpeechRecognizerThread speechRecognizer=new SpeechRecognizerThread(context);
             speechRecognizer.run();
     
             }
     
         }
 
 
 And finally here is the definition of the thread in the Android Plugin :
 
 package com.example.r_boug.myunitylib;
 
 import android.content.Context;
 import android.util.Log;
 
 import com.vuzix.speech.Constants;
 import com.vuzix.speech.VoiceControl;
 
 /**
  * Created by r_boug on 02/05/2017.
  */
 
 public class SpeechRecognizerThread implements Runnable {
 
     public Context c;
     public VoiceControl vc;
 
     public SpeechRecognizerThread(Context parameter) {
         // store parameter for later user
         c=parameter;
     }
 
     public void run() {
         vc=new VoiceControl(c) {
             @Override
             protected void onRecognition(String s) {
                 Log.d("RECONNAISSAINCE",s);
             }
         };        vc.addGrammar(Constants.GRAMMAR_NAVIGATION);
         Log.d("AFFICHAGE DU RESULTAT","FONCTION 2");
         vc.addGrammar(Constants.GRAMMAR_NAVIGATION);
         Log.d("AFFICHAGE DU RESULTAT","FONCTION 3");
         vc.on();
         Log.d("AFFICHAGE DU RESULTAT","FONCTION 4");
 
 
     }
 }

As you can see, i've tried to call all the plugin functions in the context i passed from Unity. (Maybe isn't it the main application thread?). I know that you'll have ideas to help me !

Thanks,