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.

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<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.

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<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.

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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

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<?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

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<?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

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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.

Android WebView Example

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.