How can I set an ImageView's width and height programmatically in Android using Kotlin?

This example demonstrates how to set an ImageView's width and height programmatically in Android using Kotlin.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:id="@+id/relativeLayout"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="4dp"
   tools:context=".MainActivity">
</RelativeLayout>

Step 3 − Add the following code to src/MainActivity.kt

import android.os.Bundle
import android.widget.ImageView
import android.widget.RelativeLayout
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      val relativeLayout: RelativeLayout = findViewById(R.id.relativeLayout)
      val imageView = ImageView(this)
      imageView.setImageResource(R.drawable.image)
      val params = RelativeLayout.LayoutParams(
         RelativeLayout.LayoutParams.MATCH_PARENT,
         RelativeLayout.LayoutParams.MATCH_PARENT
      )
      imageView.layoutParams = params
      relativeLayout.addView(imageView)
   }
}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.example.q11">
   <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>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen

Azhar

Published on 18-Aug-2020 12:12:24

• Related Questions & Answers
• How can I set an ImageView's width and height programmatically in Android?
• How do I get the height and width of the Android Navigation Bar programmatically using Kotlin?
• How to set the margin of ImageView programmatically in Android using Kotlin ?
• How can I set a Border for an ImageView in Android?
• How can I get android device screen height, width?
• How do I get the height and width of the Android Navigation Bar programmatically?
• How do I load an ImageView by URL on Android using kotlin?
• How to clear an ImageView in Android using Kotlin?
• How to set margins in an Android LinearLayout programmatically using Kotlin?
• How to overlay two images in Android to set an imageview using Kotlin?
• How to get the device's IMEI/ESN programmatically in android using Kotlin?
• How can I get the current Android SDK version programmatically using Kotlin?
• How I can set the width and height of a JavaScript alert box?
• How to set width and height of an element using jQuery?
• Android imageView Zoom-in and Zoom-Out using Kotlin?