Getting current active animation clip from the animation editor window?

So i want to get the active animation clip from the animation editor:


I found some help on another post but its not working, and I cannot figure out whats wrong. Unity returns:

MissingMethodException: UnityEditorInternal.AnimationWindowState.get_activeAnimationClip Due to: Attempted to access a missing member.

but when I try to print all the methods, the getter for ActiveAnimationClip is there! I even checked in UnityCsReference/blob/master/Editor/Mono/Animation/AnimationWindow/AnimationWindowState.cs



Here is the code that I used for this:

Code (CSharp):

1. using System;
2. using System.Reflection;
3. using UnityEditor;
4. using UnityEngine;
5. using Object = System.Object;
6.  
7. public class wAnimationWindowHelper
8. {
9.     [MenuItem("CustomStuff/PrintActiveClip")]
10.     public static void GetActiveClip()
11.     {
12.         GetAnimationWindowCurrentClip();
13.     }
14.  
15.  
16.     static System.Type animationWindowType = null;
17.  
18.     static System.Type GetAnimationWindowType()
19.     {
20.         if (animationWindowType == null)
21.         {
22.             animationWindowType = System.Type.GetType("UnityEditor.AnimationWindow,UnityEditor");
23.         }
24.  
25.         return animationWindowType;
26.     }
27.  
28.     static UnityEngine.Object GetOpenAnimationWindow()
29.     {
30.         UnityEngine.Object[] openAnimationWindows = Resources.FindObjectsOfTypeAll(GetAnimationWindowType());
31.         if (openAnimationWindows.Length > 0)
32.         {
33.             return openAnimationWindows[0];
34.         }
35.  
36.         return null;
37.     }
38.  
39.  
40.     static AnimationClip GetAnimationWindowCurrentClip()
41.     {
42.         UnityEngine.Object w = GetOpenAnimationWindow();
43.         if (w != null)
44.         {
45.             BindingFlags flags = BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance;
46.             FieldInfo animEditor = GetAnimationWindowType().GetField("m_AnimEditor", flags);
47.  
48.             Type animEditorType = animEditor.FieldType;
49.             System.Object animEditorObject = animEditor.GetValue(w);
50.             FieldInfo animWindowState = animEditorType.GetField("m_State", flags);
51.             Type windowStateType = animWindowState.FieldType;
52.  
53.             System.Object clip = windowStateType.InvokeMember("get_activeAnimationClip",
54.                 BindingFlags.InvokeMethod | BindingFlags.Public, null, animWindowState.GetValue(animEditorObject),
55.                 null);
56.  
57.             Debug.Log(clip);
58.            
59.  
60.             return (AnimationClip) clip;
61.         }
62.  
63.         return null;
64.     }
65. }

 

If you haven't found a solution yet, this worked for me:
I replaced

Code (CSharp):

1. System.Object clip = windowStateType.InvokeMember("get_activeAnimationClip", BindingFlags.InvokeMethod | BindingFlags.Public, null, animWindowState.GetValue(animEditorObject), null);

with

Code (CSharp):

1. PropertyInfo propInfo = windowStateType.GetProperty("activeAnimationClip");
2. System.Object clip = propInfo.GetValue(animWindowState.GetValue(animEditorObject));

 

Brilliant. This works. Thank you.