How to dynamically count the number of resources in a folder? And make it cross platform

Questions & Answers
1

Hi,

I need a way of counting the number of resources within the resource folder making it cross platform, specifically with android and ios.

All my levels are stored as json files within a sub directory of the resource folder. I have the following property to return a count of the levels.

public static int TotalMapCount
        {
            get
            {   
                return Directory.GetFiles(Application.dataPath + "/resources/" + LevelDirectory, "*.json", SearchOption.AllDirectories).Length;

        }
    }

This works great when developing in Unity but as soon as I push it to android I get the following errors.

Directory ‘/data/app/mygame/base.apk/resources/data/levels’ not found.

Any ideas how I can solve this?

Thanks

2

There is no Resources directory in a built player, only resources.assets file. If you still need a resource count, you can create a custom build script, which will create a file with a list (or a count) of resources. And then at runtime, just read this resource:

public static class BuildUtils { //it mus be in Editor folder

    [MenuItem("Build/With Resource Count")]
    public static void CustomBuild() {
        var count = Directory.GetFiles(
            Application.dataPath + "/resources/" + LevelDirectory,
            "*.json", SearchOption.AllDirectories);

        File.WriteAllText(Application.dataPath + "/resources/count.txt", "count=" + count);
        AssetDatabase.Refresh();

        BuildPipeline.BuildPlayer(
            new[] { "Assets/Scenes/MyScene.unity" },
            "path/to/built/player",
            BuildTarget.Android,
            BuildOptions.None);
    }
}

public class SomeBehavior : MonoBehaviour {

    void Start() {
        var textAsset = Resources.Load<TextAsset>("count.txt");
        Debug.Log(textAsset.text);
    }
}
3

You can use Resources.LoadAll(string path) which returns an Object[] and then use the array length as your count. Just be sure to unload those resources once your done, otherwise they will stay in memory. Something like this:

private static int totalMapCount = -1;
public static int TotalMapCount
{
   get
   {
      if (totalMapCount == -1)
      {
          Object[] maps = Resources.LoadAll("LevelDirectory");
          totalMapCount = maps.Length;
          Resources.UnloadUnusedAssets();
      }
      return totalMapCount;
   }
}
4

you can always add a textAssets with the data needed for the folder managing likes the number of files, list of files and etc…