Hello Readers! In this post, we are going to learn about how to use android imageButton programmatically in kotlin in the application. We will also learn how to add imageButton to linearLayout programmatically in android application.

Output

Tutorialwing Kotlin Dynamic ImageButton Output

Getting Started

At first, we will create android project. Then, we will create and use imageButton programmatically in kotlin file.

1. Creating New Project in Kotlin

Follow the steps below to create new project. Please ignore the steps if you have already created a new project.

Now, we will modify xml and kotlin file to use imageButton dynamically.

2. Modify Values Folder

Open res/values/strings.xml file. Then, add below code into it.

<resources>
	<string name="app_name">DynamicImageButton</string>
	<string name="img_btn_clicked">You clicked ImageButton</string>
</resources>

3. Modify Layout Folder

Open res/layout/activity_main.xml file. Then, add below code into it.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
	android:id="@+id/rootContainer"
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="match_parent"
	android:layout_height="match_parent"
	android:gravity="center"
	android:orientation="vertical">

</LinearLayout>

In activity_main.xml file, we have defined a linearLayout, with id rootContainer, that will act s container for the imageButton created programmatically in the application.

4. Create Android ImageButton Programmatically / Dynamically in Kotlin

Open app/src/main/java/com.tutorialwing.dynamicimagebutton/MainActivity.kt file. Then, add below code into it.

package com.tutorialwing.dynamicimagebutton

import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.view.ViewGroup
import android.widget.ImageButton
import android.widget.LinearLayout
import android.widget.Toast

class MainActivity : AppCompatActivity() {

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

        val imageButton = ImageButton(this)
        imageButton.layoutParams = LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)
        imageButton.setImageResource(R.mipmap.ic_launcher)

        imageButton.setOnClickListener { Toast.makeText(this@MainActivity, R.string.img_btn_clicked, Toast.LENGTH_SHORT).show() }

        val linearLayout = findViewById<LinearLayout>(R.id.rootContainer)
        // Add ImageButton to LinearLayout
        linearLayout.addView(imageButton)
    }
}

In MainActivity.kt file, we have defined an imageButton programmatically in kotlin application. Then, we have set layoutParams and image in it. After that, we have set clickListener that will display a toast message whenever it is clicked. At last, we have added this imageButton widget in linearLayout.

Since AndroidManifest.xml file is very important in any android application, we are also going to see the content inside this file.

AndroidManifest.xml file

Code inside src/main/AndroidManifest.xml file is –

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

	<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>

When we run the program, we will get output as shown above.

That’s end of our tutorial on Creating Android ImageButton Programmatically in Kotlin.