83.7 Performing the Activity Initialization

The next step is to modify the activity to perform a number of initialization tasks. Remaining within the MainActivity.kt file, modify the code as follows:

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import android.media.MediaRecorder

import android.os.Environment

import android.view.View

import android.media.MediaPlayer

 

import kotlinx.android.synthetic.main.activity_main.*

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class MainActivity : AppCompatActivity() {

 

    private var mediaRecorder: MediaRecorder? = null

    private var mediaPlayer: MediaPlayer? = null

 

    private var audioFilePath: String? = null

    private var isRecording = false

 

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)

        setContentView...