(Newbie) Optimize this android LED-toggle?

Hello, hate to waste peoples time but I don't know how to move forward. About a week ago I started making my first project, which will be an app. Everything was going suprisingly well, until I got to this part. I managed after a few hours to come up with this code. A script that is assigned to one button as a toggle.

 using UnityEngine;
 using System.Collections;
 
 public class FlashToggle : MonoBehaviour {
 
     private bool Active;
     private AndroidJavaObject camera1;
     
     public void FL_Toggle()
     {
         if (Active == true) 
         {
         camera1.Call("stopPreview");
         camera1.Call("release");
         Active = false;
         } 
         else 
         {
                 AndroidJavaClass cameraClass = new AndroidJavaClass ("android.hardware.Camera");  
                 WebCamDevice[] devices = WebCamTexture.devices;
 
                 camera1 = cameraClass.CallStatic<AndroidJavaObject> ("open", 0);
         
                 if (camera1 != null) {
                         AndroidJavaObject cameraParameters = camera1.Call<AndroidJavaObject> ("getParameters");
                         cameraParameters.Call ("setFlashMode", "torch");
                         camera1.Call ("setParameters", cameraParameters);
                         camera1.Call ("startPreview");
                         Active = true;
             }
         }
     }
 }

The code works, problem is it lags my phone for about 1.5 seconds until the LED(Front flashlight) turns off/on. Does anyone know how to make this smoother? Thanks in advance. Oh, and as I said I'm really new, 90% of times I figure things out... After some time, I'd appreciate if you could keep it idiot-friendly - IF possible :)