WebView App Android Studio Source Code

AndroidManifest.xml Replace With This code

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

    <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/Theme.AppCompat.DayNight.NoActionBar">
        <meta-data
            android:name="com.google.firebase.messaging.default_notification_icon"
            android:resource="@drawable/{icon file name}" />
        <meta-data android:name="com.google.firebase.messaging.default_notification_color"
            android:resource="@color/black" />

        <meta-data
            android:name="com.google.android.gms.ads.APPLICATION_ID"
            android:value="App Id"/>


        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>





</manifest>

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MainActivity.java Replace code

package com.example.app;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Window;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;


import static android.content.ContentValues.TAG;


import com.google.android.gms.ads.AdError;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.FullScreenContentCallback;
import com.google.android.gms.ads.LoadAdError;
import com.google.android.gms.ads.MobileAds;
import com.google.android.gms.ads.initialization.InitializationStatus;
import com.google.android.gms.ads.initialization.OnInitializationCompleteListener;
import com.google.android.gms.ads.interstitial.InterstitialAd;
import com.google.android.gms.ads.interstitial.InterstitialAdLoadCallback;




public class MainActivity extends AppCompatActivity {


    WebView web;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        MobileAds.initialize(this, new OnInitializationCompleteListener() {
            @Override
            public void onInitializationComplete(InitializationStatus initializationStatus) {
            }
        });

        AdRequest adRequest = new AdRequest.Builder().build();

        InterstitialAd.load(this,"ca-app-pub-4959260796037303/1173886848", adRequest,
                new InterstitialAdLoadCallback() {
                    @Override
                    public void onAdLoaded(@NonNull InterstitialAd interstitialAd) {




                        interstitialAd.show(MainActivity.this);



                        interstitialAd.setFullScreenContentCallback(new FullScreenContentCallback() {
                            @Override
                            public void onAdFailedToShowFullScreenContent(@NonNull AdError adError) {
                                super.onAdFailedToShowFullScreenContent(adError);



                            }

                            @Override
                            public void onAdShowedFullScreenContent() {
                                super.onAdShowedFullScreenContent();

                            }

                            @Override
                            public void onAdDismissedFullScreenContent() {
                                super.onAdDismissedFullScreenContent();


                            }

                            @Override
                            public void onAdImpression() {
                                super.onAdImpression();



                            }

                            @Override
                            public void onAdClicked() {
                                super.onAdClicked();

                            }
                        });


                    }

                    @Override
                    public void onAdFailedToLoad(@NonNull LoadAdError loadAdError) {


                    }
                });


        web = findViewById(R.id.webView);
        WebSettings webSettings = web.getSettings();
        webSettings.setJavaScriptEnabled(true);
        web.setWebViewClient(new Callback());
        web.loadUrl("https://en.blog.hskstudy.org");
    }

    @Override
    public void onBackPressed() {
        {
            if (web.canGoBack()) {
                web.goBack();
            } else {
                super.onBackPressed();


            }
        }

    }


    private class Callback extends WebViewClient {
        @Override
        public boolean shouldOverrideKeyEvent(WebView view, KeyEvent event) {
            return false;
        }


    }
}

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Activity_main.xml Replace with this code

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


    <WebView
        android:id="@+id/webView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>

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Project: Build.gradle Replace with this code

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:7.0.4"
        classpath 'com.google.gms:google-services:4.3.10'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

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Module: Build.gradle Replace with this code

plugins {
    id 'com.android.application'
    id 'com.google.gms.google-services'
}

android {
    compileSdk 32

    defaultConfig {
        applicationId "com.example.app"
        minSdk 19
        targetSdk 32
        versionCode 1
        versionName "1.0"
        dependencies {

            implementation 'com.google.android.gms:play-services-ads-lite:20.5.0'
            implementation 'androidx.appcompat:appcompat:1.4.1'
            implementation 'com.google.android.material:material:1.5.0'
            implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
            implementation 'com.google.firebase:firebase-messaging-ktx:23.0.0'
            testImplementation 'junit:junit:'
            androidTestImplementation 'androidx.test.ext:junit:1.1.3'
            androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
        }

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {
    implementation 'com.google.firebase:firebase-analytics:20.0.2'
    implementation 'com.google.firebase:firebase-messaging:23.0.0'
    implementation 'com.google.firebase:firebase-messaging-ktx:23.0.0'
}