Q:

How to specify the width and height of an image in android for sw600dp-port-tvdpi drawable? 

I am a newbie to Android Designing.  I am developing an app which should be suitable for Android devices including the 7 inch and 9 inch tabs. 
I am at present designing for a resfolder of the type layout-sw600dp-port-tvdpi.  
I am using a drawable folder of the type drawable-sw600dp-port-tvdpi.  
I have used an image 19px by 19px for drawable-mdpi.  Can anyone guide me how to calculate the pixels required for the tvdpi drawable?  
I have gone through the developer's site and found out how the pixels varies with mdpi,hdpi and xhdpi.  
And lastly, how should I specify the size of the required images in android? 

A:

For tvdpi :
Resources for screens somewhere between mdpi and hdpi; approximately 213dpi.  This is not considered a "primary" density group.  It is mostly intended for televisions and most apps shouldn't need it—providing mdpi and hdpi resources is sufficient for most apps and the system will scale them as appropriate.  If you find it necessary to provide tvdpi resources, you should size them at a factor of 1.33*mdpi.  For example, a 100px x 100px image for mdpi screens should be 133px x 133px for tvdpi. 
More Details  : http://developer.android.com/guide/practices/screens_support.html

