DetailActivity.kt

package com.wiryatech.gitdroid

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_detail.*

class DetailActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_detail)

        val sectionsPagerAdapter = SectionsPagerAdapter(this, supportFragmentManager)
        vp_detail.adapter = sectionsPagerAdapter
        tab_detail.setupWithViewPager(vp_detail)

        supportActionBar?.elevation = 0f
    }
}