Article about how to reduce method count: http://jeroenmols.com/blog/2016/05/06/methodcount/

Count with

apply plugin: 'com.getkeepsafe.dexcount'

in app's build.gradle file (apply AFTER Android plugin)

Interactive chart is in build/outputs/dexcount/debugChart or build/outputs/dexcount/releaseChart

Reduce with:

• choosing right libs (useful tool for this: http://www.methodscount.com)
• ProGuard