MainActivity.kt

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


    private fun observeData(){

        viewModel.fetchVersionCode.observe(this, Observer { result ->
            when(result){
                is Resource.Loading -> {
                    showProgress()
                }

                is Resource.Success -> {
                    val actualVersion = result.data
                    Toast.makeText(this,"Version: ${result.data}",Toast.LENGTH_SHORT).show()
                    if(appIsOutDated(actualVersion)){
                        showUpdateProgress()
                    }

                    hideProgress()
                }

                is Resource.Failure -> {
                    Toast.makeText(this,"Error ${result.exception.message}",Toast.LENGTH_SHORT).show()
                    hideProgress()
                }
            }
        })

    }