Kotlin: How to get and set a text to TextView in Android using Kotlin?

user_7013334 0
Viewed 171978

I'm newbie.

I want to change text of TextView While click on it.

My code: 

val text: TextView = findViewById(R.id.android_text) as TextView
    text.setOnClickListener {
        text.setText(getString(R.string.name))
    }

Output: I got the output but showing use property access syntax.

Can anyone tell me how to do it?

Thanks in advance.

kotlin textview android
13 Answers

just add below line and access direct xml object

import kotlinx.android.synthetic.main.activity_main.*

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

        txt_HelloWorld.text = "abc"
    }

replace activity_main according to your XML name

user_43880360

to set text in kotlin

textview.text = "write here"
user_79743160

Yes its late - but may help someone on reference

xml with EditText, Button and TextView

onClick on Button will update the value from EditText to TextView

        <EditText
            android:id="@+id/et_id"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

        <Button
            android:id="@+id/btn_submit_id"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

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

Look at the code do the action in your class

Don't need to initialize the id's of components like in Java. You can do it by their xml Id's

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

        btn_submit_id.setOnClickListener {
            txt_id.setText(et_id.text);
        }
    }

also you can set value in TextView like,

textview.text = "your value"
user_50492440 
import kotlinx.android.synthetic.main.MainActivity.*

class Mainactivity : AppCompatActivity() {


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

        txt.setText("hello Kotlin")

    }

}
user_94123050
  • go to build.gradle(:app) file

add dependencies{

 apply plugin: 'kotlin-android'
    apply plugin: 'kotlin-android-extensions'
  • after that go to your Activity file and write this line

import kotlinx.android.synthetic.main.activity_main.*

Done!!

now you may direct find your widget using their id.

Thanks

user_168072170

findViewById(R.id.android_text) does not need typecasting.

user_10909730

Kotlin synthetics have deprecated therefore you can use bindingView method. after implementing basefragment or baseActivity you can use binding as in below:

binding.textView.text ="type your text here"

user_31941160

The top post has 'as TextView' appended on the end. You might get other compiler errors if you leave this on. The following should be fine. 

val text: TextView = findViewById(R.id.android_text) as TextView

Where 'android_text' is the ID of your textView

user_92170400

This procedure works for me:

Go to build.gradle(Module: -> after dependencies { add these lines:

apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

You can watch the video in this link.

user_167048160
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