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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.
Step | Description |
---|---|
1. | Open Android Studio. |
2. | Go to File => New => New Project. Write application name as DynamicImageButton. Then, check Include Kotlin Support and click next button. |
3. | Select minimum SDK you need. However, we have selected 17 as minimum SDK. Then, click next button |
4. | Then, select Empty Activity => click next => click finish. |
5. | At this point, You will get a newly created android project successfully. |
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.