kotlin-android-extensions not working. what will be the problem?

Question

I was following some guide(download android studio today) of kotlin and I have use the setText and it's not working. what will be the problem?

package com.example.basic

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.TextView
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main.*

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

        button.setOnClickListener {
            Toast.makeText(applicationContext, "button was pressed.", Toast.LENGTH_LONG).show()
        }

        button2.setOnClickListener {
            val input = editTextTextPersonName.text.toString()
            TextView.setText("entered value: ${input}")
        }
    }
}

(I had tried replace setText to text but it's still red and can't save it)

Unresolved reference: setText(error)

It seems you're using the TextView class itself but I assume you want to use your view. maybe it starts with a small case textView. Check the id of that TextView in XML. You may want to change the id, if it has the same name as the class. — Mayur Gajra
– Mayur Gajra, Commented Feb 4, 2022 at 10:42

Ivo · Accepted Answer · 2022-02-04 10:42:53Z

4

TextView is the name of the class. You need to apply setText on an instance of the class. just like you did

editTextTextPersonName.text.toString()

instead of

EditText.text.toString()

I don't know that your TextView is called but you then need to do

instanceOfYourTextView.setText("entered value: ${input}")

answered Feb 4, 2022 at 10:42

Ivo

23.7k2 gold badges32 silver badges41 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

kimhaju Over a year ago

Thank! But even after following what you said, setText didn't work.

kimhaju Over a year ago

Oh! I think I was missing the TextView's id. It was 'TextView2'. Thanks!

Pako1 · Accepted Answer · 2022-02-04 11:39:46Z

0

As Mayur Gajra did mention you are not using the view from the XML but instead you are using the TextView class and this is your problem, what you need to have instead is something like this:

<TextView
     android:id="@+id/text"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:text=""
     />

And then your MainActivity should look like the following:

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

        button.setOnClickListener {
            Toast.makeText(applicationContext, "button was pressed.", Toast.LENGTH_LONG).show()
        }

        button2.setOnClickListener {
            val input = editTextTextPersonName.text.toString()
            text.setText("entered value: ${input}")
        }
    }
}

answered Feb 4, 2022 at 11:39

Pako1

2472 silver badges12 bronze badges

2 Comments

kimhaju Over a year ago

Oh! I think I was missing the TextView's id. It was 'TextView2'. Thanks!

Pako1 Over a year ago

Sure no problem

Collectives™ on Stack Overflow

kotlin-android-extensions not working. what will be the problem?

2 Answers 2

2 Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related