If you are an app developer you will know the problem. You start an app but require many different icons, in different sizes (ldpi, mdpi, hdpi, xhdpi, xxhdpi, xxxhdpi), different colors, and different variants. If you get the icons as vector (.svg) or there are many changes over the time, you will always have to get the correct drawables again.

This consumes a lot of time!

Now there's an easy, fast, and small solution for this!
The Iconics library.

This library allows you to include vector icons everywhere in your project. No limits are given. Scale with no limit, use any Color at any time, provide a contour, and many additional customizations...

Use the icons in the variation you need them.

What do you get
- No customization limitations (size, color, contour, background, padding, positioning, ...)
- Shadow support
- One icon source (no more mdpi, hdpi, ...)
- Flexibility
- Size
- Colors
- Contour
- Shadow
- If it takes an Drawable, it will also work with the IconicsDrawable!
- Save in APK size

Already available fonts
- Material Icons
- FontAwesome
- Material Design Icons
- Meteocons
- Octicons
- Community Material Icons
- Weather Icons
- Typeicons
- Entypo
- Ionicons
- Foundation Icons

https://github.com/mikepenz/Android-Iconics

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.