Gallery OnFling event not working

I've come up with a problem using a G开发者_运维百科allery of Views, by Views I mean that is not a gallery of simple ImageViews, but instead a complex structure that could be resumed as follows:

• Gallery

  1. FrameLayout

     a. LinearLayout

     • ImageView (*)

  b. LinearLayout (-)

  • TextView

  • LinearLayout

    1. ScrollView

       a. LinearLayout

       - ImageView
       - TextView
       

The problem is that the onFling is not getting called whenever I fling over the ImageView (*). Don't know if the problem might come in the fact that I have a ScrollView over there, nevertheless the LinearLayout (-) has visibility GONE.

Do you know what might me causing the problem, and if you do, what could be a solution for it. Thanks.

Is imageView is 'clickable' or 'focusable'?