Добавил кэширование поскейленных картинок, чтобы расходовать меньше батарейки и сетевого трафика

Assets/Scripts/PhotoFrame.cs

@@ -20,6 +20,7 @@ public class PhotoFrame : MonoBehaviour
     InputField url;
 
 	private int currentImage;
+	private Cache cache;
 
 	private Image CurrentImage
 	{
@@ -33,6 +34,7 @@ public class PhotoFrame : MonoBehaviour
 
 	public void Start()
 	{
+		cache = new Cache(Application.persistentDataPath);
 		Screen.sleepTimeout = SleepTimeout.NeverSleep;
 		currentImage = 0;
 		ActivateUI(true);
@@ -89,29 +91,40 @@ public class PhotoFrame : MonoBehaviour
 			int imageIndex = Random.Range(0, loader.images.Count);
 			string imageUrl = loader.images[imageIndex];
 
-			var request = UnityWebRequest.Get(imageUrl);
-			request.downloadHandler = new DownloadHandlerTexture(true);
-			yield return request.SendWebRequest();
-
-			if (request.isNetworkError || request.isHttpError)
+			var bytes = cache.Get(imageUrl);
+			if (bytes != null)
 			{
-				yield return new WaitForSeconds(1f);
-				continue;
+				var tex = new Texture2D(2, 2);
+				tex.LoadImage(bytes);
+				SetImageTexture(NextImage, tex);
 			}
-
-			var downloadTime = Time.realtimeSinceStartup - startTime;
-			if (PHOTO_INTERVAL > downloadTime)
+			else
 			{
-				yield return new WaitForSeconds(PHOTO_INTERVAL - downloadTime);
+				var request = UnityWebRequest.Get(imageUrl);
+				request.downloadHandler = new DownloadHandlerTexture(true);
+				yield return request.SendWebRequest();
+
+				if (request.isNetworkError || request.isHttpError)
+				{
+					yield return new WaitForSeconds(1f);
+					continue;
+				}
+
+				var downloadTime = Time.realtimeSinceStartup - startTime;
+				if (PHOTO_INTERVAL > downloadTime)
+				{
+					yield return new WaitForSeconds(PHOTO_INTERVAL - downloadTime);
+				}
+
+				var dh = request.downloadHandler as DownloadHandlerTexture;
+				var tex = dh.texture;
+
+				SetImageTexture(NextImage, tex);
+				dh.Dispose();
+				request.Dispose();
+				cache.Add(imageUrl, tex.EncodeToJPG());
 			}
 
-			var dh = request.downloadHandler as DownloadHandlerTexture;
-			var tex = dh.texture;
-
-			SetImageTexture(NextImage, tex);
-			dh.Dispose();
-			request.Dispose();
-
 			float currentStart = CurrentImage.color.a;
 			float currentFinish = transparent.a;
 			float nextStart = NextImage.color.a;