Designing for Android for the first time is…challenging. And trying to understand Density Independent Pixels (DP) vs. Dots Per Inch (DPI) vs. LDPI, MDPI, HDPI, & XHDPI vs. Pixel ratios is an exercise in madness.
If anyone has any pity, please take a look at this (see attachment) and let me know if I'm on the right track with screen sizes and (semi) accurate wireframe layouts.