Demo files created using Android studio template engine.

activity_demo.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">

    <data>

        <variable
            name="viewModel"
            type="com.ktvipin.templatedemo.demo.DemoViewModel" />
    </data>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context="com.ktvipin.templatedemo.demo.DemoActivity">

    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>

DemoActivity.kt

package com.ktvipin.templatedemo.demo

import android.content.Context
import android.content.Intent
import android.os.Bundle
import com.ktvipin.templatedemo.R
import com.ktvipin.templatedemo.core.BaseActivity
import com.ktvipin.templatedemo.databinding.ActivityDemoBinding

class DemoActivity : BaseActivity<ActivityDemoBinding, DemoViewModel>() {

    override val layoutId: Int
        get() = R.layout.activity_demo

    override val viewModelClass: Class<DemoViewModel>
        get() = DemoViewModel::class.java

    override fun onCreated(savedInstanceState: Bundle?, extras: Bundle?) {
        super.onCreated(savedInstanceState, extras)
    }

    companion object {
        fun start(context: Context) {
            context.startActivity((Intent(context, DemoActivity::class.java)))
        }
    }
}

DemoViewModel.kt

package com.ktvipin.templatedemo.demo

import android.os.Bundle
import com.ktvipin.templatedemo.core.BaseViewModel

class DemoViewModel : BaseViewModel() {

    override fun onActivityCreated(extras: Bundle?) {
        super.onActivityCreated(extras)
    }
}