To get the most out of your Android phone’s background image, you need to ensure the resolution is at least two times the screen’s resolution. While most Android devices have a wide range of screens and pixel sizes, you can find the perfect wallpaper by following a few basic rules. First, be sure to check the phone’s screen resolution. If it’s not at least 320×480, you should look for a 640×480 wallpaper.
As the resolution of an Android background image varies, you need to take the same factors into account. First, you need to determine the size of your phone’s screen. Most devices have different screen sizes and pixel density. For example, a 200×200 image on a high-end phone should be generated as a 150×150 image for a hdpi device, and a 75×75 on a low-end device.