Skip to content
Related Articles

Related Articles

Dynamic TextView in Kotlin
  • Last Updated : 18 Feb, 2021

Android TextView is an user interface that is used to display some text to the user.

In this article we will be discussing how to programmatically create a TextView in Kotlin .

Let’s start by first creating a project in Android Studio. To do so, follow these instructions:

  • Click on File, then New and then New Project and give name whatever you like
  • Then, select Kotlin language Support and click next button.
  • Select minimum SDK, whatever you need.
  • Select Empty activity and then click finish.

Modify activity_main.xml file

Second step is to design our layout page. Here, we will use the RelativeLayout to get the TextView from the Kotlin file.




<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/root"
        tools:context=".MainActivity">
  
  
</RelativeLayout>

Create TextView in MainActivity.kt file

Open app/src/main/java/yourPackageName/MainActivity.kt. In this file, we declare a variable TextView to create the TextView widget like this:

     val textView = TextView(this)
     //setting height and width
    textView.layoutParams = LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)

then add the widget in layout using this:

 
        // Add TextView to LinearLayout
        layout?.addView(textView)




package com.geeksforgeeks.myfirstKotlinapp
  
import android.graphics.Color
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.TypedValue
import android.view.ViewGroup
import android.widget.RelativeLayout
import android.widget.TextView
import android.widget.Toast
  
class MainActivity : AppCompatActivity() {
  
    override fun onCreate(savedInstanceState: Bundle?)
    {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
  
        val layout = findViewById<RelativeLayout>(R.id.root)
  
        // Create TextView programmatically.
        val textView = TextView(this)
  
        // setting height and width
        textView.layoutParams= RelativeLayout.LayoutParams(
            ViewGroup.LayoutParams.WRAP_CONTENT, 
            ViewGroup.LayoutParams.WRAP_CONTENT)
        // setting text
        textView.setText("GEEKSFORGEEKS")
        textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 40f)
        textView.setTextColor(Color.MAGENTA)
        // onClick the text a message will be displayed "HELLO GEEK"
        textView.setOnClickListener()
        {
            Toast.makeText(this@MainActivity, "HELLO GEEK"
                Toast.LENGTH_LONG).show()
        }
  
        // Add TextView to LinearLayout
        layout ?.addView(textView)
    }
}

AndroidManifest.xml file




<?xml version="1.0" encoding="utf-8"?>
          package="i.apps.textview">
  
    <application
            android:allowBackup="true"
            android:icon="@mipmap/ic_launcher"
            android:label="@string/app_name"
            android:roundIcon="@mipmap/ic_launcher_round"
            android:supportsRtl="true"
            android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
  
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
  
</manifest>

Run as Emulator:

Want a more fast-paced & competitive environment to learn the fundamentals of Android?
Click here to head to a guide uniquely curated by our experts with the aim to make you industry ready in no time!



My Personal Notes arrow_drop_up
Recommended Articles
Page :