How can i make a ScreenShot and Share button in unity for AR(ARCORE)

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 using System.IO;
  
 public class ShareScreenshot : MonoBehaviour {
   
  private bool isProcessing = false;
  public float startX;
  public float startY;
  public int valueX;
  public int valueY;
  
  
  
  public void shareScreenshot(){
  
   if(!isProcessing && GameObject.Find("Ask Friend").GetComponent<Image>().enabled)
    StartCoroutine( captureScreenshot() );
  }
  
  public IEnumerator captureScreenshot(){
   isProcessing = true;
   yield return new WaitForEndOfFrame();
   
   Texture2D screenTexture = new Texture2D(Screen.width*valueX/10000, Screen.height*valueY/10000,TextureFormat.RGB24,true);
  
   // put buffer into texture
   //screenTexture.ReadPixels(new Rect(0f, 0f, Screen.width, Screen.height),0,0);
   //create a Rect object as per your needs.
   screenTexture.ReadPixels(new Rect
                            (Screen.width*startX, (Screen.height*startY), Screen.width*valueX/10000, Screen.height*valueY/10000),0,0);
  
   // apply
   screenTexture.Apply();
  
   //----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PHOTO
  
   //byte[] dataToSave = Resources.Load<TextAsset>("everton").bytes;
   byte[] dataToSave = screenTexture.EncodeToPNG();
    
   string destination = Path.Combine(Application.persistentDataPath,System.DateTime.Now.ToString("yyyy-MM-dd-HHmmss") + ".png");
    
   File.WriteAllBytes(destination, dataToSave);
  
  
   if(!Application.isEditor)
   {
    // block to open the file and share it ------------START
    AndroidJavaClass intentClass = new AndroidJavaClass("android.content.Intent");
    AndroidJavaObject intentObject = new AndroidJavaObject("android.content.Intent");
    intentObject.Call<AndroidJavaObject>("setAction", intentClass.GetStatic<string>("ACTION_SEND"));
    AndroidJavaClass uriClass = new AndroidJavaClass("android.net.Uri");
    AndroidJavaObject uriObject = uriClass.CallStatic<AndroidJavaObject>("parse","file://" + destination);
    intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_STREAM"), uriObject);
    intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_TEXT"), "Which Football Club does this Rebus represent?\n" +
                                         "Download the game on play store at "+"\nhttps://play.google.com/store/apps/details?id=com.TGC.RebusFC&pcampaignid=GPC_shareGame");
    intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_SUBJECT"), "Which club is this?");
    intentObject.Call<AndroidJavaObject>("setType", "image/jpeg");
    AndroidJavaClass unity = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
    AndroidJavaObject currentActivity = unity.GetStatic<AndroidJavaObject>("currentActivity");
     
    // option one WITHOUT chooser:
    currentActivity.Call("startActivity", intentObject);
     
    // block to open the file and share it ------------END
     
   }
   isProcessing = false;
  
  }
 }

1. Create a C# script named ShareScreenshot and paste the below code to it:

   1. Attach the script to Main Camera or any object that is present on the scene.

   2. Call the shareScreenshot() method on click of a button.