MainActivity.kt

public class MainActivity : Activity() {
    private lateinit var userAvatarImageView: ImageView
    private lateinit var firstNameTextView: TextView
    private lateinit var lastNameTextView: TextView
    private var apiInterface: APIInterface? = null
    override fun onCreate(savedInstanceState: Bundle) {
        super.onCreate(savedInstanceState)
        sInstance = this
        setContentView(R.layout.activity_main)
        initViews()
        apiInterface = APIClient.getClient().create(APIInterface::class.java)
        loadUserProfile()
    }

    private fun initViews() {
        firstNameTextView = findViewById(R.id.user_name)
        lastNameTextView = findViewById(R.id.user_name)
        userAvatarImageView = findViewById(R.id.user_avatar)
    }

    private fun loadUserProfile() {
        val userAuthToken = DnCustomerPreferences.getInstance(this).userAuthToken
        val call = apiInterface.doGetUserProfile(userAuthToken)
        call.enqueue(object : Callback<UserResponse> {
            override fun onResponse(call: Call<UserResponse>, response: Response<UserResponse>) {
                firstNameTextView.text = parseUserName(response.body()?.name)[0]
                lastNameTextView.text = parseUserName(response.body()?.name)[1]
            }

            override fun onFailure(call: Call<UserResponse>, t: Throwable) {
            }
        })
        userAvatarImageView.setImageBitmap(BitmapFactory.decodeStream(assets.open("user_avatar.png")))
    }

    private fun parseUserName(fullName: String): List<String> {
        if (fullName.contains(".")) {
            return fullName.split(".")
        } else {
            if (fullName.contains(",")) {
                return fullName.split(",")
            } else {
                if (fullName.contains(" ")) {
                    return fullName.split(" ")
                } else {
                    return mutableListOf(fullName)
                }
            }
        }
    }

    public fun showToast(message: String) = Toast.makeText(this, message, Toast.LENGTH_SHORT)

    companion object {
        var sInstance: MainActivity? = null
    }
}

data class UserResponse(val name: String?)