Learn Spring for Android Application Development

Modifying the activity

Here is the code for RegistrationActivity:

class RegistrationActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {        super.onCreate(savedInstanceState)        setContentView(R.layout.activity_registration)    }}

Now add some logic to validate the username, password, and email id. Here is the code:

private fun validateName(): Boolean {    if (username_input_reg.text.toString().trim().isEmpty()) {        username_title_reg.error = getString(R.string.err_msg_name)        requestFocus(username_input_reg)        return false    } else {        username_title_reg.isErrorEnabled = false    }    return true}private fun validateEmail(): Boolean {    if (email_input_reg.text.toString().trim().isEmpty() || !isValidEmail(email_input_reg.text.toString(). ...