MainActivity.kt

class MainActivity : AppCompatActivity() {

    companion object {
        private val LOG_TAG = MainActivity::class.java.simpleName

        private const val APP_ID = ""
        private const val CHANNEL = ""
        private const val TOKEN = ""

        private const val PERMISSION_CODE = 22
    }

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

        if (permissionsGranted()) {
            initializeApplication()
        } else {
            requestPermissions()
        }
    }

    private fun permissionsGranted(): Boolean {
    }

    private fun requestPermissions() {
    }

    override fun onRequestPermissionsResult(
        requestCode: Int,
        permissions: Array<out String>,
        grantResults: IntArray
    ) {
    }

    private fun initializeApplication() {
    }

    override fun onDestroy() {
    }
}