Design from iOS to Android and Back Again

Typography

Type plays an immensely important role in Android and material design. Roboto is the default font family for Android, and includes a number of weights as well as a condensed variant. However, just like with iOS, you should incorporate your brand’s typographic palette into your app. Make sure to test your fonts on a couple of Android devices, since Android’s font layout engine and rasterizer are different from the one in OSX and iOS. Sometimes the same typeface will look better in one font format than another, so be sure to sample each OTF and TTF for the typeface. Finally, typography uses a slightly finer baseline grid of 4dp, so line heights should be 20dp, 24dp, 32dp, 36dp, etc.

So what’s different about Android?

Now that you know a little bit about material design, let’s talk about how Android is different from iOS and other platforms.
Use density-independent pixels (dp) and design in vector at 1x
On Android, the key unit of measure is the density-independent pixel, often abbreviated DIP or DP. If you’re coming from an iOS or web design background, DPs are essentially equivalent to points on iOS or CSS pixels. Measuring and sizing things in DPs ensures your designs have a consistent physical size across devices of varying density.