Default How to make a multi-dpi apk ?

Hello !!! I found in the comunity a nice contacts and phone apk's, but the problem whit them is that they form and spesific dpi (i guess) Can some one tell me how to make a multi-dpi apk ?

ROM: N900XXUDND1_N900ODDDNA3_INU
Device: SM-900

Here are the apk's:
Attached Files
File Type: apk SecPhone.apk - [Click for QR Code] (16.27 MB, 10 views)
File Type: apk SecContacts_OSup.apk - [Click for QR Code] (18.30 MB, 12 views)