How Can I make animation on 1st checkbox.?

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  when change state of checkbox (on->off or off->on), it makes animation. But 1st item just jumpping. Because called : jumpDrawablesToCurrentState();

  
  

  Member said "It is google code, So we cannot chaanged and it just happend multipannel case. so fixing your issue, you should override jumpDrawablesTocCurrentState() with empty api."

  
  

  But I cannot understand, Why it is happened. They didn't answer to me about it. How can I understand ?

  
  

  And in Document, jumpToCurrentState() API is using for skip any active animation when draw the state changed animation. Could I get more information about it ?

  
  

I wand fix this issue more perfectly without any bug. For it, I need to get more information and find way for fixing. If it has problem in Google code follow the Member's opinion before, please explain why it happened!

Please share to me why using jump code for animation more detail. And How Can I make animation on 1st checkbox.