Android How to Integrate Google AdMob in your App

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="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="com.codeplayon.MainActivity">

<Button
android:id="@+id/btn_fullscreen_ad"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="@string/btn_fullscreen_ad" />

<Button
android:id="@+id/btn_show_rewarded_video"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/btn_fullscreen_ad"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:text="@string/btn_rewarded_video" />

<com.google.android.gms.ads.AdView
android:id="@+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
ads:adSize="BANNER"
ads:adUnitId="@string/banner_home_footer">
</com.google.android.gms.ads.AdView>
</RelativeLayout>

package com.codeplayon.admob;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdSize;
import com.google.android.gms.ads.AdView;

public class MainActivity extends AppCompatActivity {
private AdView mAdView;
private Button btnFullscreenAd, btnShowRewardedVideoAd;

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

btnFullscreenAd = (Button) findViewById(R.id.btn_fullscreen_ad);
btnShowRewardedVideoAd = (Button) findViewById(R.id.btn_show_rewarded_video);
btnFullscreenAd.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
startActivity(new Intent(MainActivity.this, InterstitialAdActivity.class));
}
});

btnShowRewardedVideoAd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(MainActivity.this, RewardedVideoAdActivity.class));
}
});
// TODO - remove this if condition
// it's for demo purpose
if (TextUtils.isEmpty(getString(R.string.banner_home_footer))) {
Toast.makeText(getApplicationContext(), "Please mention your Banner Ad ID in strings.xml", Toast.LENGTH_LONG).show();
return;
}
mAdView = (AdView) findViewById(R.id.adView);
mAdView.setAdSize(AdSize.BANNER);
mAdView.setAdUnitId(getString(R.string.banner_home_footer));
MobileAds.initialize(this, "ca-app-pub-XXXXXXXXXXXXXXXXXXXX");
AdRequest adRequest = new AdRequest.Builder()
.addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
// Check the LogCat to get your test device ID
.addTestDevice("XXXXXXXXXXXXXXXXXXXXXXXXX")
.build();
mAdView.setAdListener(new AdListener() {
@Override
public void onAdLoaded() {
}

@Override
public void onAdClosed() {
Toast.makeText(getApplicationContext(), "Ad is closed!", Toast.LENGTH_SHORT).show();
}

@Override
public void onAdFailedToLoad(int errorCode) {
Toast.makeText(getApplicationContext(), "Ad failed to load! error code: " + errorCode, Toast.LENGTH_SHORT).show();
}

@Override
public void onAdLeftApplication() {
Toast.makeText(getApplicationContext(), "Ad left application!", Toast.LENGTH_SHORT).show();
}

@Override
public void onAdOpened() {
super.onAdOpened();
}
});
mAdView.loadAd(adRequest);
}

@Override
public void onPause() {
if (mAdView != null) {
mAdView.pause();
}
super.onPause();
}

@Override
public void onResume() {
super.onResume();
if (mAdView != null) {
mAdView.resume();
}
}

@Override
public void onDestroy() {
if (mAdView != null) {
mAdView.destroy();
}
super.onDestroy();
}}

package com.codeplayon.admob;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;
import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.InterstitialAd;

public class SecondActivity extends AppCompatActivity {
private String TAG = SecondActivity.class.getSimpleName();

InterstitialAd mInterstitialAd;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
mInterstitialAd = new InterstitialAd(this);
// set the ad unit ID
mInterstitialAd.setAdUnitId(getString(R.string.interstitial_full_screen));
AdRequest adRequest = new AdRequest.Builder()
.build();
// Load ads into Interstitial Ads
mInterstitialAd.loadAd(adRequest);
mInterstitialAd.setAdListener(new AdListener() {

public void onAdLoaded() {
showInterstitial();
}
});
}

private void showInterstitial() {
if (mInterstitialAd.isLoaded()) {
mInterstitialAd.show();
}
}
}

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.MobileAds;
import com.google.android.gms.ads.reward.RewardItem;
import com.google.android.gms.ads.reward.RewardedVideoAd;
import com.google.android.gms.ads.reward.RewardedVideoAdListener;


public class RewardedVideoAdActivity extends AppCompatActivity {
private RewardedVideoAd mRewardedVideoAd;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_rewarded_video_ad);
mRewardedVideoAd = MobileAds.getRewardedVideoAdInstance(this);
mRewardedVideoAd.setRewardedVideoAdListener(new RewardedVideoAdListener() {

@Override
public void onRewarded(RewardItem rewardItem) {
Toast.makeText(RewardedVideoAdActivity.this, "onRewarded! currency: " + rewardItem.getType() + "  amount: " +
rewardItem.getAmount(), Toast.LENGTH_SHORT).show();
}

@Override
public void onRewardedVideoAdLeftApplication() {
Toast.makeText(RewardedVideoAdActivity.this, "onRewardedVideoAdLeftApplication",
Toast.LENGTH_SHORT).show();
}

@Override
public void onRewardedVideoAdClosed() {
Toast.makeText(RewardedVideoAdActivity.this, "onRewardedVideoAdClosed", Toast.LENGTH_SHORT).show();
}

@Override
public void onRewardedVideoAdFailedToLoad(int errorCode) {
Toast.makeText(RewardedVideoAdActivity.this, "onRewardedVideoAdFailedToLoad", Toast.LENGTH_SHORT).show();
}

@Override
public void onRewardedVideoAdLoaded() {
Toast.makeText(RewardedVideoAdActivity.this, "onRewardedVideoAdLoaded", Toast.LENGTH_SHORT).show();
}

@Override
public void onRewardedVideoAdOpened() {
Toast.makeText(RewardedVideoAdActivity.this, "onRewardedVideoAdOpened", Toast.LENGTH_SHORT).show();
}

@Override
public void onRewardedVideoStarted() {
Toast.makeText(RewardedVideoAdActivity.this, "onRewardedVideoStarted", Toast.LENGTH_SHORT).show();
}
});
loadRewardedVideoAd();
}

private void loadRewardedVideoAd() {
mRewardedVideoAd.loadAd(getString(R.string.rewarded_video),
new AdRequest.Builder().build());
// showing the ad to user
showRewardedVideo();
}

private void showRewardedVideo() {
// make sure the ad is loaded completely before showing it
if (mRewardedVideoAd.isLoaded()) {
mRewardedVideoAd.show();}
}

@Override
public void onResume() {
mRewardedVideoAd.resume(this);
super.onResume();
}

@Override
public void onPause() {
mRewardedVideoAd.pause(this);
super.onPause();
}

@Override
public void onDestroy() {
mRewardedVideoAd.destroy(this);
super.onDestroy();
}}