Android wallpaper got stretched

My screen size is 600px开发者_如何转开发 * 800px.

I created some wallpapers whose sizes are 600px * 800px or width:height=3:4, when they were set as wallpaper, they got stretched, so the lower and right part couldn't be seen.

Does anybody how to solve this problem to make my wallpapers fit to the screen?

Android crops a part of your wallpaper so that when you swipe left and right, the background scrolls with it. For more information see this link or this link