This is a collection of SVG templates for creating Android material design launcher icons. They are clean enough to be used directly with a text-editor, but contain all necessary metadata to edit in Inkscape.
To render bitmaps for APKs and store listings, you should check out avianey/androidsvgdrawable-plugin.
This page and SVG images are available on GitHub at aeirola/android-svg-icon-template.
The square example product icon from Android Icon Design guidelines using values specified in the “Product icon metrics” section.
Long shadows aren’t part of the official guidelines, but are widely used in both Google and trhird party icons.