Kotlin Android – WebView
Android AlertDialog class is used to display a web page embedded in the Android Activity. The web page could be displayed in the same Android Application, without opening a browser window.
WebView could be used in your Android Application like any other View (say TextView, Button, etc.).
To display WebView in your Android Activity
Step 1: Add permission for INTERNET in AndroidManifest.xml. Applications that make use of WebView require INTERNET permission. To let Android know that our application require INTERNET, include the following line in AndroidManifest.xml.
<uses-permission android:name="android.permission.INTERNET" />
Step 2: Include Android WebView In layout fileYou can include following WebView snippet in Layout file to display WebView in Activity.
<WebView android:id="@+id/webView" android:layout_width="match_parent" android:layout_height="match_parent" />
Step 3: Load URL in WebView programmatically in Activity file.
webView.loadUrl("https://www.google.com/")
Example – Android AlertDialog
In this Example Kotlin Android Application, we shall display a WebView and load “www.google.com url”.
Create a Kotlin Android Application with Empty Activity and modify the following files.
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.tutorialkart.webviewexample"> <uses-permission android:name="android.permission.INTERNET" /> <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>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#EEE" tools:context=".MainActivity"> <TextView android:text="Web View Example" android:gravity="center" android:padding="20sp" android:layout_width="match_parent" android:layout_height="wrap_content" /> <WebView android:id="@+id/webView" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout>
MainActivity.kt
package com.tutorialkart.webviewexample import android.support.v7.app.AppCompatActivity import android.os.Bundle import kotlinx.android.synthetic.main.activity_main.* class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) webView.loadUrl("https://www.google.com/") } }
Run this Android Application, and you will get a WebView embedded in the Application as shown in the following screenshot.

Conclusion
In this Kotlin Android Tutorial – AlertDialog Example, we have learnt to display an Alert Dialog box in Activity. We also learnt to set title, message and Positive, Negative buttons of AlertDialog.