Materia Flat icon set is using Material style guide for icons in 24x24 grid and colored in soft flat colors. These icons are a perfect choice to use in Android.
Materia contains icons divided into following categories: appliances, arrows & symbols, auto technic, baby, basic, biology, buildings, communication, computers, database, design, finance, food, fruits & vegetables, halloween, hardware, holiday, human, interface, interior, kitchen, lightning, maps & travel, military, multimedia, music, nature, office, phone, presentations, science, security, social_free, space, sport, tools, transport, video & games, weather.
AI (Adobe Illustrator file CS5 version). 24x24 px icons. Each icon category is on it's own layer.
EPS (Adobe Illustrator v10) layered file with all categories.
SVG files for individual icons.
Transparent PNG. Sizes:
MDPI 24x24 px.
HDPI 36x36 px.
XHDPI 48x48 px.
XXHDPI 72x72 px.
XXXHDPI 96x96 px.