Unity3D编辑器之打开unity不可识别的文件

有些特殊后缀名的文件在unity里是不可识别的。如下图所示，这里我把文本的后缀改成了*.xx 这样unity就不认识了。那么双击就没反应了，我想做的就是在双击此类文件的时候指定一个应用程序打开它。

代码中我指定了用sublime来打开后缀是.xx的文件。

using UnityEngine;
using UnityEditor;
using UnityEditor.Callbacks;
 
public class MyAssetHandler
{
 
    [OnOpenAssetAttribute(1)]
    public static bool step1(int instanceID, int line)
    {
       //string name = EditorUtility.InstanceIDToObject(instanceID).name;
       // Debug.Log("Open Asset step: 1 (" + name + ")");
        return false; // we did not handle the open
    }
 
    // step2 has an attribute with index 2, so will be called after step1
    [OnOpenAssetAttribute(2)]
    public static bool step2(int instanceID, int line)
    {
 
        string path = AssetDatabase.GetAssetPath(EditorUtility.InstanceIDToObject(instanceID));
        string name = Application.dataPath + "/" + path.Replace("Assets/", "");
 
 
        if (name.EndsWith(".xx"))
        {
            System.Diagnostics.Process process = new System.Diagnostics.Process();
            System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
            startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
            startInfo.FileName = "D:/Program Files/Sublime Text 3/sublime_text.exe";
            startInfo.Arguments = name;
            process.StartInfo = startInfo;
            process.Start();
            return true;
        }
       // Debug.Log("Open Asset step: 2 (" + name + ")");
        return false; // we did not handle the open
    }
}

这样就OK啦。在双击的时候sublime就打开啦。