From this link, we see that:
hdpi: High-density screens; approximately 240dpi.
xhdpi: Extra-high-density screens; approximately 320dpi. Added in API Level 8
large: Screens that are of similar size to a medium-density VGA
screen. The minimum layout size for a large screen is approximately
480x640 dp units. Examples are VGA and WVGA medium-density screens.
As far as smallestWidth or sw, it says the following:
Some values you might use here for common screen sizes:
320, for devices with screen configurations such as:
240x320 ldpi
(QVGA handset)
320x480 mdpi (handset)
480x800 hdpi (high-density
handset)
480, for screens such as 480x800 mdpi (tablet/handset).
600,
for screens such as 600x1024 mdpi (7" tablet).
720, for screens such
as 720x1280 mdpi (10" tablet).
Edit:
The order in which a drawable is labeled with suffixes is important. For example:
In this case, drawable-large-hdpi will pick the
large attribute first, meaning that its pixel density approximately 480*640 dp units. Then,
hdpi is approximately 240dpi. Android will use hdpi based on the device dots per inches of the device running.
I believe that 480*640 will translate to layout-sw600dp, screen with smallest width of 600dp. Usually for tablets with screen of 7 inches in diagonal measurement.
For safety measures, you can create a folder under layout-sw600dp-hdpi and layout-sw600dp-xhdpi and test it and see how it runs on hdpi and xhdpi tablets.
Note:
Keep in mind that developers who created the previous folders e.g: drawable-large-hdpi may have put whatever they wanted in wherever. So it does not mean that an image within drawable-large-hdpi is surely of 480*640 dimensions and is only for hdpi devices.
