Having repaired lots of Hudl2 with cracked screens, one of the things I’ve noticed is that a lot of people like to customize their Hudl2 with their own unique wallpaper. The trouble is that very few people seem to know how to do it properly!
This is probably because the most common assumption is that the wallpaper needs to match the resolution the Hudl2 screen to display perfectly. In truth it needs to be significantly bigger than this. The resolution of the Hudl2 screen is 1920 x 1200, which is of course one of the great things about the Hudl2. You still can’t buy a budget tablet in the Hudl2’s price point to this very day with a screen that good. However, the wallpaper needs to be higher resolution than this, for the simple reason that the Hudl2 can be used in portrait or landscape mode. As the wallpaper rotates when you rotate the Hudl2 if you use a 1920 x 1200 wallpaper it will not display correctly as the wallpaper in Lollipop will scale the image and crop it to 2400 x 1920.
Here’s an example that shows the issue. This uses one of the default Tesco Wallpapers as an example. You can’t browse to these by default on the Hudl2 running Lollipop as they are in the system folder that requires root to access. However, you can use an app called Wallpaper Saver on the Play store.
As you can see in the example above, the middle square represents the total pixel resolution of the Hudl2 screen. The image itself has a bleed area around the edge. This is what allows the wallpaper to shift slightly as you scroll between different home screens, and results in the wallpaper displaying correctly, irrespective if you are holding you Hudl2 in portrait or landscape orientations.
So what does this mean if you are trying to make your own wall paper for the Hudl2? Putting it simply, you need to insure that you use a 1920 x 2400 image and that the bit of the image that you want to focus on is in the middle of the image. This is the primary reason that the default Tesco wallpapers work so well. I.E. they all, without exception feature people in the center of the frame of the photo.