AssetDeliveryExtension

AssetDeliveryExtension.cs

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Object = UnityEngine.Object;
using Google.Play.AssetDelivery;

public class AssetDeliveryExtension
{
    private const string assetBundleName = "instantbundle";

    public static Action<float, AssetDeliveryStatus> OnDownloadStatus;
    public static Action<AssetDeliveryErrorCode> OnAssetLoadFail;

    private static AssetBundle instantBundle = null;
    private static bool assetDownloadRoutineRunning = false;

    public static void AssetDownloader(MonoBehaviour monoBehaviour)
    {
        monoBehaviour.StartCoroutine(AssetDownloadRoutine());
    }

    public static IEnumerator AssetDownloadRoutine()
    {      
        PlayAssetBundleRequest bundleRequest = PlayAssetDelivery.RetrieveAssetBundleAsync(assetBundleName);
        var startTime = Time.realtimeSinceStartup;
        while (!bundleRequest.IsDone) {
            OnDownloadStatus?.Invoke(bundleRequest.DownloadProgress, bundleRequest.Status);
            yield return null;
        }

        if (bundleRequest.Error == AssetDeliveryErrorCode.NoError)
        {
            instantBundle = bundleRequest.AssetBundle;
        }
        else
        {
            Debug.Log("error downloading asset: " + bundleRequest.Error);
            OnAssetLoadFail?.Invoke(bundleRequest.Error);
        }
    }
}