Refer
https://google.github.io/dagger/android.html https://github.com/damianpetla/kotlin-dagger-example https://code.tutsplus.com/tutorials/dependency-injection-with-dagger-2-on-android--cms-23345 https://qiita.com/FlameArche/items/d87b2105bbd95243f3f6 http://www.vogella.com/tutorials/Dagger/article.html