JNI (Java Native Interface) Get a list of app icons

I'm working on a launcher but I need to get the icons from the Package Manager.
It doesn't yet work but it should already do something. Does anyone know how to get it working?
I based my code on this one: https://github.com/frankkienl/BaxyLauncherOUYA/blob/master/src/nl/frankkie/baxy/MakeImageCache.java

Code (CSharp):

1. AndroidJavaClassup = newAndroidJavaClass("com.unity3d.player.UnityPlayer");
2. AndroidJavaObjectca = up.GetStatic<AndroidJavaObject>("currentActivity");
3. AndroidJavaObjectpackageManager = ca.Call<AndroidJavaObject>("getPackageManager");
4.  
5. AndroidJavaObjectmainIntent = newAndroidJavaObject ("Intent", "Intent.ACTION_MAIN", null);
6. mainIntent.Call ("addCategory", "Intent.CATEGORY_LAUNCHER");
7. mainIntent.Call ("addCategory", "tv.ouya.intent.category.GAME");
8. List<AndroidJavaObject> resolvedInfos = packageManager.Call<List<AndroidJavaObject>>("queryIntentActivities",mainIntent, 0);
9.  
10. AndroidJavaObjectresources = newAndroidJavaObject ("Resources");
11.  
12. foreach (AndroidJavaObjectresolvedInfoinresolvedInfos) {
13. //TODO Fix this line
14. //resources = packageManager.Call<AndroidJavaObject>("getResourcesForApplication", resolvedInfo);
15.  
16. //TODO Get the real package name
17. //AndroidJavaObjectfileOutputStream = newAndroidJavaObject("FileOutputStream", "/sdcard/BAXY/thumbnails/" + packageName + ".png");
18. }