Android Wallpaper/background Dimensions

Which are the default dimension of the Home wallpaper/background for the various Android screen configurations (small, normal and large screens with low, medium and high density)?

Solution 1:

A wallpaper is twice as wide as the device held in portrait mode. So 960x800 on a Nexus One, 960x854 on a Droid, 640x480 on a G1/Magic/Hero, etc.

Solution 2:

This article on the Android Developers' site shows the range of screen resolutions for each density.

I believe the wallpapers have to match the screen resolution and are not stretched. You can see this if, for example, you create a new emulator with a high screen density like 480x854. The default home screen background is centred, with large black bands at the top and bottom.

The WallpaperManager API indicates that you must use a PNG- or JPEG-format image, even if you use the setResource() method — the resource must be a Bitmap and so not a nine-patch or other type of Drawable.

Solution 3:

Don't guess, ask the WallpaperManager:

manager = WallpaperManager.getInstance(this);width = manager.getDesiredMinimumWidth();height = manager.getDesiredMinimumHeight();