Android : Android - D-Pad Navigation and Button Effects

I am developing an application to be used in an Android TV environment. I am having a problem about how to implement this using the D-Pad navigation.

I want to achieve this effect.

But I am having problems like:

• how could I resize the ImageView at run-time?


• how to have a hovered-state ImageView?


• 
  

  how to move the hovered button according to your d-pad input?

  
  

  Currently this is my what I have done.

  
  

I implemented this using horizontal linear layout and ImageViews. Thank you