Easily OnBackPressed

ExitActivity.kt

class ExitActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        finish()
    }

    companion object {

        fun exit(context: Context) {
            val intent = Intent(context, ExitActivity::class.java)
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK)
            context.startActivity(intent)
        }
    }

}