title: Set Layout as per every screen size of device in Android
body: <p>My app has an image in background and I want to adjust buttons size and position as per the image size. Image size change as per the device screen size.</p>
  
  <p>I want to do it in XML layout file or using coding.
  Please help me......</p>
  
  <p>Thanks ion advance....</p>
  
  <p>I am using android 4.1.</p>