APPController

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

public class AppController : MonoBehaviour
{
    private List<TrackedPlane> m_NewPlanes = new List<TrackedPlane>();
    private List<TrackedPlane> m_AllPlanes = new List<TrackedPlane>();
    private bool m_IsQuitting = false;

    // Use this for initialization
    void Start()
    {
        QuitOnConnectionErrors();
    }

    // Update is called once per frame
    void Update()
    {

        if (Session.Status != SessionStatus.Tracking)
        {
            const int lostTrackingSleepTimeout = 15;
            Screen.sleepTimeout = lostTrackingSleepTimeout;

            return;
        }
        Screen.sleepTimeout = SleepTimeout.NeverSleep;

    }


    private void QuitOnConnectionErrors()
    {
        if (m_IsQuitting)
        {
            return;
        }

        // Quit if ARCore was unable to connect and give Unity some time for the toast to appear.
        if (Session.Status == SessionStatus.ErrorPermissionNotGranted)
        {
            ShowAndroidToastMessage("Camera permission is needed to run this application.");
            m_IsQuitting = true;
            Invoke("_DoQuit", 0.5f);
        }
        else if (Session.Status.IsError())
        {
            ShowAndroidToastMessage("ARCore encountered a problem connecting.  Please start the app again.");
            m_IsQuitting = true;
            Invoke("_DoQuit", 0.5f);
        }

    }

    private static void ShowAndroidToastMessage(string message)
    {
        AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject unityActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");

        if (unityActivity != null)
        {
            AndroidJavaClass toastClass = new AndroidJavaClass("android.widget.Toast");
            unityActivity.Call("runOnUiThread", new AndroidJavaRunnable(() =>
            {
                AndroidJavaObject toastObject = toastClass.CallStatic<AndroidJavaObject>("makeText", unityActivity,
                    message, 0);
                toastObject.Call("show");
            }));
        }
    }

}