PluginWrapper.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PluginWrapper : MonoBehaviour
{
    AndroidJavaClass unityClass;
    AndroidJavaObject unityActivity;
    AndroidJavaClass customClass;
    AndroidJavaObject receiver; // Receiver reference

    void Start()
    {
        sendActivityReference("com.your.example.StatusCheckStarter");
        customClass.CallStatic("createInstance");
        startService();
        customClass.CallStatic("makeToast");

        RegisterReceiver(); // Register the receiver
    }

    public void decreaseCount()
    {
        stopService();
        UnregisterReceiver(); // Unregister when stopping the service
    }

    void RegisterReceiver()
    {
        receiver = new AndroidJavaObject("com.your.example.ServiceMessageReceiver"); // Create an instance of your receiver
        AndroidJavaObject intentFilter = new AndroidJavaObject("android.content.IntentFilter");
        intentFilter.Call("addAction", "com.your.example.MESSAGE"); // Action to listen for

        // Register the receiver with the activity context
        unityActivity.Call("registerReceiver", receiver, intentFilter);
    }

    void UnregisterReceiver()
    {
        if (receiver != null)
        {
            unityActivity.Call("unregisterReceiver", receiver); // Unregister the receiver
            receiver = null; // Clear the reference
        }
    }

    void sendActivityReference(string packageName)
    {
        unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        unityActivity = unityClass.GetStatic<AndroidJavaObject>("currentActivity");
        customClass = new AndroidJavaClass(packageName);
        customClass.CallStatic("receiveActivityInstance", unityActivity);
    }

    void startService()
    {
        customClass.CallStatic("StartCheckerService");
    }

    void stopService()
    {
        customClass.CallStatic("StopCheckerService");
    }

    // This method will be called from the BroadcastReceiver
    public void OnServiceMessageReceived(int number)
    {
        Debug.Log("Received number from service: " + number);
        // Add your logic here to handle the received number
    }

    private void OnDestroy()
    {
        UnregisterReceiver(); // Ensure the receiver is unregistered when the object is destroyed
    }
}