How To Setup Admob Interstitial Ad in Application Implement Interstitial Ad Android Studio

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Build.Gradle

plugins {
    id 'com.android.application'
}

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.3"

    defaultConfig {
        applicationId "com.usmsof.myapplication"
        minSdkVersion 18
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"
        multiDexEnabled true

        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 'androidx.appcompat:appcompat:1.3.0'
    implementation 'com.google.android.material:material:1.4.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'


    implementation 'com.google.android.gms:play-services-ads:20.2.0'


}

AndroidManifests.xml

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


    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>



    <application
        android:allowBackup="true"
        android:icon="@drawable/usmtip"
        android:label="@string/app_name"
        android:roundIcon="@drawable/usmtip"
        android:supportsRtl="true"
        android:theme="@style/Theme.MyApplication">
        <activity android:name=".ActivityOne" />
        <activity android:name=".HomeActivity" />
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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



        <meta-data
            android:name="com.google.android.gms.ads.APPLICATION_ID"
            android:value="ca-app-pub-3940256099942544~3347511713"/>


    </application>

</manifest>

Activity.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".HomeActivity">


      <Button
        android:id="@+id/interstitialAd"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="show interstitial ad"
        android:layout_centerInParent="true"/>






</RelativeLayout>

Activity.java

package com.usmsof.myapplication;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;
import android.view.View;
import android.widget.Button;

import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
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 HomeActivity extends AppCompatActivity {


    private InterstitialAd mInterstitialAd;

    private Button button;



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



        button = (Button) findViewById(R.id.interstitialAd);




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


         //Interstitial Ad 
        AdRequest adRequest = new AdRequest.Builder().build();
        InterstitialAd.load(this,"ca-app-pub-3940256099942544/1033173712", adRequest,
                new InterstitialAdLoadCallback() {
                    @Override
                    public void onAdLoaded(@NonNull InterstitialAd interstitialAd) {
                        mInterstitialAd = interstitialAd;

                    }

                    @Override
                    public void onAdFailedToLoad(@NonNull LoadAdError loadAdError) {
                        mInterstitialAd = null;
                    }
                });








        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if (mInterstitialAd != null) {
                    mInterstitialAd.show(HomeActivity.this);
                } else {
                    Log.d("TAG", "The interstitial ad wasn't ready yet.");
                }

                prepareAd();

            }
        });






    }



    private void prepareAd() {


        AdRequest adRequest = new AdRequest.Builder().build();
        //Interstitial Ad
        InterstitialAd.load(this,"ca-app-pub-3940256099942544/1033173712", adRequest,
                new InterstitialAdLoadCallback() {
                    @Override
                    public void onAdLoaded(@NonNull InterstitialAd interstitialAd) {
                        mInterstitialAd = interstitialAd;

                    }

                    @Override
                    public void onAdFailedToLoad(@NonNull LoadAdError loadAdError) {
                        mInterstitialAd = null;
                    }
                });




    }

}