No file in "Application.streamingAssetsPath"

Hi.
I'm trying load a data from xml file using this code:
File is stored in "StreamingAssets".

Code (CSharp):

1. string result = "";
2.         if (Application.platform == RuntimePlatform.Android)
3.         {
4.            
5.             string RootFolder = Application.streamingAssetsPath + "/levels_data.xml";
6.             if (!File.Exists(RootFolder)) { Debug.Log("No file"); }
7.             if (RootFolder.Contains("://"))
8.             {
9.                 WWW reader = new WWW(RootFolder);
10.                 while (!reader.isDone) { };
11.                 result = reader.text;
12.                 Debug.Log(result);
13.             }
14.             else
15.             {
16.                 result = File.ReadAllText(RootFolder);
17.                 Debug.Log("OK "+result);
18.             }
19.         }

I don't know is it a proper code but it works. Only one thing is interesting.
When I do a test "File.Exists" it says there is no file, but rest of code works.
So how it works if there is no file?
Or, if there is a file why it says "No file"?

Thank you.

 

The documentation describes how it works on Android:
https://docs.unity3d.com/ScriptReference/Application-streamingAssetsPath.html

 

OK. So how to check if there is "file" represented by URL?

 

As documented here https://docs.unity3d.com/ScriptReference/WWW-error.html if you encounter an error, then something went wrong (didn't find the file for example)

 

Code (CSharp):

1.  
2. WWW reader = new WWW(RootFolder);
3.                 while (!reader.isDone) { };
4.                 if (!string.IsNullOrEmpty(reader.error))
5.                 {
6.                     Debug.Log("No file "+reader.error);
7.                 }
8.                 result = reader.text;
9.                 Debug.Log(result);

I try to check "IsNullOrEmpty" and it works but before this unity throw a error anyway:
java.io.FileNotFoundException.

This error is throwing in "www" constructor so how to check file before constructor "www" starts?
Using try-catch is only solution?

Regards.

 

You should be yielding your www https://docs.unity3d.com/ScriptReference/WWW.html

Basically, do your www call, yield it, then after the yield do the error check. And of course, this code has to be in a coroutine. The yield tells the code to wait till it's done.

File.Exists should be enough to check if a file is there before you try to load it.

 

OK. I though I can do the same using just while loop.

Thank you.