Apps Loading Videos into Tab View

[kivy]

Hi there ,

I am very new to Android and stuck with my application.
I am desperately looking for a way to access the phone's and SD's video gallery/directory and load the videos into my tab view, while arranging them as thumbs in some sort of grid view.

I started to look at this here:

 startActivityForResult(new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.INTERNAL_CONTENT_URI), PICK_VIDEO);

     @Override
        public void onActivityResult(int requestCode, int resultCode, Intent data) {
        	  super.onActivityResult(requestCode, resultCode, data);
        	  if (requestCode == PICK_VIDEO)
        	    if (resultCode == Activity.RESULT_OK) {
        	      Uri selectedVideo = data.getData();
        	      // TODO Do something with the select Video URI
        	    } 
        }

but it says that it cannot resolve PICK_VIDEO, i am really stuck here and would be glad for some help..Thanks