Review Of Android Wallpaper Size Fix Ideas. As you guys might have noticed, whenever you set a wallpaper using the default android gallery, it kinda compresses it and results in a low quality version of the pic as your wallpaper. Run the gallery application, navigate to show the picture you want on the whole screen, then select “set as…” and “set picture as…wallpaper” android now pops up your picture with an orange box to let you crop the wallpaper.
But you can install a versatile editor like google snapseed and then (after some editorial improvements and cropping to 16:9 ratio) you can export. Remember to get the highest resolution wallpaper. Tap on the button in the lower part of the screen to confirm the action.