Cordova Andriod Plugin - open an android native activity from Cordova Plugin

My requirement is to open an android native simple activity from Cordova Plugin.

I tried the solutions mentioned in this thread. But I am getting error (Sample App, Unfortunately stopped)

I am going crazy over past few days.

Here is my code base

Note: When I look at the log in my device in debug mode, it seems like it is not finding MainActivity.java Can anyone help me with this, any sample Cordova Plugin to open an native android activity would help me.

The link below can help to open a native android activity from ionic platform using plugin
Ionic Open Android Native Activity