Check if EditText is empty kotlin android

Question

How do you check if an EditText is empty? input type number

package com.example.www.myappl         


        

Answer 1

class MainActivity : AppCompatActivity() {

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

        val btnSignUp : Button = findViewById(R.id.signUp)

        val et_username : EditText = findViewById(R.id.etUsername)
        val et_email : EditText = findViewById(R.id.etEmail)
        val et_password : EditText = findViewById(R.id.etPassword)

        btnSignUp.setOnClickListener{
            val user_msg_error: String = et_username.text.toString()

            //check if the EditText have values or not
            if(user_msg_error.trim().isEmpty()) {
                et_username.error = "Required"
                Toast.makeText(applicationContext, "User Name Required ", Toast.LENGTH_SHORT).show()
            }
            else if (et_email.text.toString().trim().isEmpty()) {
                et_email.error = "Required"
                Toast.makeText(applicationContext, "Email Required ", Toast.LENGTH_SHORT).show()
            }
            else if (et_password.text.toString().trim().isEmpty()) {
                et_password.error = "Required"
                Toast.makeText(applicationContext, "Password Required ", Toast.LENGTH_SHORT).show()
            }
            else{
                Toast.makeText(applicationContext, "Login Successful ", Toast.LENGTH_SHORT).show()

            // After successful login u will move on next page/ activity

                val i = Intent(this,SecondActivity::class.java)
                startActivity(i)
            }

        }


    }


}