activity_main.xml

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

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

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

        <!---Always use Test App Id while testing your application-->
        <meta-data
            android:name="com.google.android.gms.ads.APPLICATION_ID"
            android:value="ca-app-pub-3940256099942544~3347511713" />
    </application>

</manifest>

gradle.build (app)

dependencies {

    // Implement Google Admob dependency
    implementation project(':nativetemplates')
}

templates

1. Download Native Ad Templates from https://github.com/googleads/googleads-mobile-android-native-templates/archive/refs/heads/master.zip
2. Import the downloaded modules in the Android Studio
Note :- If you don't know how to download and import templates then you can watch our video tutorials
available on the Learnoset YouTube channel.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <!---Showing Native ads in small Template-->
    <com.google.android.ads.nativetemplates.TemplateView
        android:id="@+id/my_template"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:gnt_template_type="@layout/gnt_small_template_view" />

    <!---Showing Native ads in medium Template-->
    <com.google.android.ads.nativetemplates.TemplateView
        android:id="@+id/my_template2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        app:gnt_template_type="@layout/gnt_medium_template_view" />

</LinearLayout>

MainActivity.java

package com.learnoset.googlenativeads;

import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.google.android.ads.nativetemplates.NativeTemplateStyle;
import com.google.android.ads.nativetemplates.TemplateView;
import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdLoader;
import com.google.android.gms.ads.AdRequest;
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.nativead.NativeAd;
import com.google.android.gms.ads.nativead.NativeAdOptions;

import java.util.List;

public class MainActivity extends AppCompatActivity {

    private AdLoader adLoader;

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

        // Add below code in your launcher activity like SplashScreen etc.
        MobileAds.initialize(this, new OnInitializationCompleteListener() {
            @Override
            public void onInitializationComplete(InitializationStatus initializationStatus) {
            }
        });

        // load native ads
        adLoader = new AdLoader.Builder(MainActivity.this, "ca-app-pub-3940256099942544/2247696110")
                .forNativeAd(new NativeAd.OnNativeAdLoadedListener() {
                    @Override
                    public void onNativeAdLoaded(NativeAd NativeAd) {

                        // check if ad has loaded. If you are loading multiple native ads then you must check wheather all the ads loaded
                        if (!adLoader.isLoading()) {
                            Toast.makeText(MainActivity.this, "Native ads loaded successfully", Toast.LENGTH_SHORT).show();
                        }

                        // check if activity is destroyed. If activity is destroyed then also destroy the Native Ad.
                        // Otherwise it may cause null pointer exception or Memory leaks
                        if (isDestroyed()) {
                            NativeAd.destroy();
                        }

                        // we are using Native Ad built - in templates you can also create your own layout to show native ads.
                        NativeTemplateStyle styles = new
                                NativeTemplateStyle.Builder().withMainBackgroundColor(new ColorDrawable(Color.WHITE)).build(); // setting native ad background color

                        // small template
                        TemplateView template = findViewById(R.id.my_template);

                        // medium template
                        TemplateView template2 = findViewById(R.id.my_template2);

                        template.setStyles(styles);
                        template.setNativeAd(NativeAd);

                        template2.setStyles(styles);
                        template2.setNativeAd(NativeAd);

                        // OR you can also show native ad in your own Custom Layout
                        final String getHeadline = NativeAd.getHeadline(); // getting headline from Native Ad
                        final com.google.android.gms.ads.nativead.NativeAd.Image getIcon = NativeAd.getIcon();
                        final String getDetails = NativeAd.getBody();
                        final String getAdvertierName = NativeAd.getAdvertiser();
                        final String getPrice = NativeAd.getPrice();
                        final double getRating = NativeAd.getStarRating();
                        final List<com.google.android.gms.ads.nativead.NativeAd.Image> images = NativeAd.getImages();
                    }
                })
                .withAdListener(new AdListener() {
                    @Override
                    public void onAdFailedToLoad(LoadAdError adError) {
                        Toast.makeText(MainActivity.this, "Failed to load native ads", Toast.LENGTH_SHORT).show();
                    }
                })
                .withNativeAdOptions(new NativeAdOptions.Builder()
                        // Methods in the NativeAdOptions.Builder class can be
                        // used here to specify individual options settings.
                        .build())
                .build();

        // making ad request to google's servers
        adLoader.loadAd(new AdRequest.Builder().build()); //  single ad
        // OR
        //adLoader.loadAds(new AdRequest.Builder().build(), 3); // multiple ad maximum 5
    }
}