title: Two questions about custom app ui's and AlphaAnimation
body: <p>So I'm really picking up a lot of knowledge about customizations and animations. Right now I'm skinning my app with custom UI elements, but I'm not sure if I'm doing this correctly.</p>
  
  <p>Pretty much I'm creating a an xml file in my drawable folder with different button states and so forth. Then in my styles xml, I create a custom (for example) check box  style referencing the check box xml. Then in my layout xml I create a normal checkbox and call the check box style I made. Works great, but I'm not sure if this is an efficient approach?</p>
  
  <p>2nd, I'm learning animations and I feel that programming the animations in Java is easier then XML, which brings me to AlphaAnimation(). Alpha animation requires two long variables. When I do AlphaAnimation(1,0), it fades out fine, but I wanted to have it fade out 50% and from what I've learned in the XML version, I can do 0.5 as 50%. So I would type AlphaAnimation(1,05), but obviously that doesn't work. HOw do I go about doing that?</p>
  
  <p>Thanks!</p>