Android StreamingAssets File Access

Try it

 string filePath = "jar:file://" + Application.dataPath + "!/assets/" + fileName;
 var www = new WWW(filePath);
 yield return www;
 if (!string.IsNullOrEmpty(www.error))
 {
     Debug.LogError ("Can't read");
 }

 SomeMethod (www.text);

I may be a little late to the party, but it I managed to do it without WWW, @mpavlinsky.

Streaming Assets remain uncompressed in APK/OBB archive, so they can be read directly - if you know their offset and size. And once you do such approach is ~10 times faster (on my device at least), does not suffer memory duplication issue (WWW does) and can be used synchronously (not in a coroutine) and in any thread.

Long story short, I created Better Streaming Assets plugin that does exactly that, comes for free and is open source.

Asset Store: https://www.assetstore.unity3d.com/#!/content/103788

Github: https://github.com/gwiazdorrr/BetterStreamingAssets

Some lovely snippets:

 // contents as bytes
 byte[] data = BetterStreamingAssets.ReadAllBytes("Foo/bar.data");

 // as stream, last 10 bytes
 byte[] footer = new byte[10];
 using (var stream = BetterStreamingAssets.OpenRead("Foo/bar.data"))
 {
     footer.Seek(footer.Length, SeekOrigin.End);
     footer.Read(footer, 0, footer.Length);
 }

 // contents as text
 string contents = BetterStreamingAssets.ReadAllText("text.txt");

 // contents as lines
 string[] lines = BetterStreamingAssets.ReadAllLines("text.txt");

 // find all Xmls in Streaming Assets
 string[] paths1 = BetterStreamingAssets.GetFiles("/", "*.xml", 
     SearchOption.AllDirectories);

 // just Xmls in StreamingAssets/Config directory
 string[] paths2 = BetterStreamingAssets.GetFiles("Config", "*.xml"); 

 // check if stuff exists
 Debug.Assert(BetterStreamingAssets.FileExists("text.txt"));
 Debug.Assert(BetterStreamingAssets.DirectoryExists("Config"));

Hope this helps someone!

I solved the problem after I added my files in this directory inside the projec Assets/StreamingAssets/

then I read it inside the code

  #if UNITY_ANDROID
        string  path = "jar:file://" + Application.dataPath + "!/assets/alphabet.txt";
          WWW wwwfile = new WWW(path);
          while (!wwwfile.isDone) { }
          var filepath = string.Format("{0}/{1}", Application.persistentDataPath, "alphabet.t");
          File.WriteAllBytes(filepath, wwwfile.bytes);
  
          StreamReader wr = new StreamReader(filepath);
              string line;
              while ((line = wr.ReadLine()) != null)
              {
              //your code
              }
  #endif

@gwiazdorrr Hello and thank you for the code. Can you help me a little ? Lets say I have a StreamingAssets folder with a video "name.mp4" in it, and I build the application with binary split(with obb). How can I get the path to the video inside the obb file. Thanks.