Android UI DPI Issue - is xxxhdpi resources needed?

Question

I am designing an android app for a client. Following the guidelines of Android UI design I have sliced all the icons and images in the following dpi's - xxhdpi, xhdpi, hdpi, mdpi, ldpi.

While the android design guide says they have released xxxhdpi also. Is it necessary to include files with 640 dpi(xxxhdpi) with my app?

Does the app loading time depends on this?

Answer 1

As per Developer site

Some devices scale-up the launcher icon by as much as 25%. For example, if your highest density launcher icon image is already extra-extra-high density, the scaling process will make it appear less crisp. So you should provide a higher density launcher icon in the drawable-xxxhdpi directory, which the system uses instead of scaling up a smaller version of the icon.

Note: the drawable-xxxhdpi qualifier is necessary only to provide a launcher icon that can appear larger than usual on an xxhdpi device. You do not need to provide xxxhdpi assets for all your app's images.

Check this link for more details http://developer.android.com/design/style/iconography.html