MPAndroidChart Explained in Kotlin

I am new to Kotlin and Android programming, and somehow I have a hard time to find a really basic MPAndroidChart plugin explanation. Finally, I found the tutorial from the plugin writer himself. You can read it here.

But I want to rewrite the tutorial from a different point of view, and hope that it can help you (especially all the Android dev beginners) to understand about the concept in a better flow.