Google Ads in android

 How to used Banner Ads 

//loading Google Adds on our app
private AdView adView;
private AdRequest adRequest;
private void BannerLoadAds(){
    MobileAds.initialize(this, new OnInitializationCompleteListener() {
        @Override
        public void onInitializationComplete(InitializationStatus initializationStatus) {
        }
    });

    adView = findViewById(R.id.adView);
    adView.loadAd(adRequest);

    adView.setAdListener(new AdListener() {
        @Override
        public void onAdClicked() {
            // Code to be executed when the user clicks on an ad.
        }

        @Override
        public void onAdClosed() {
            // Code to be executed when the user is about to return
            // to the app after tapping on an ad.
        }

        @Override
        public void onAdFailedToLoad(LoadAdError adError) {
            // Code to be executed when an ad request fails.
            adView.loadAd(adRequest);
            Toast.makeText(MainActivity.this, adError.getMessage(), Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onAdImpression() {
            // Code to be executed when an impression is recorded
            // for an ad.
        }

        @Override
        public void onAdLoaded() {
            // Code to be executed when an ad finishes loading.
            super.onAdLoaded();
            Toast.makeText(MainActivity.this, "Loading ads", Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onAdOpened() {
            // Code to be executed when an ad opens an overlay that
            // covers the screen.
        }
    });

}

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

How to used Interstitial Ads

//    load InterstitialAd
    private AdView adView;
    private AdRequest adRequest;
    private InterstitialAd minterstitialAd;
    private void InterstitialAdsLoad(){

        InterstitialAd.load(this, "ca-app-pub-3940256099942544/1033173712", adRequest, new InterstitialAdLoadCallback() {
            @Override
            public void onAdFailedToLoad(@NonNull LoadAdError loadAdError) {
                super.onAdFailedToLoad(loadAdError);
                Log.d("Error", "failed to load error");
            }

            @Override
            public void onAdLoaded(@NonNull InterstitialAd interstitialAd) {
                super.onAdLoaded(interstitialAd);
                minterstitialAd = interstitialAd;
                minterstitialAd.setFullScreenContentCallback(new FullScreenContentCallback() {
                    @Override
                    public void onAdClicked() {
                        super.onAdClicked();
                    }

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

                    @Override
                    public void onAdFailedToShowFullScreenContent(@NonNull AdError adError) {
                        super.onAdFailedToShowFullScreenContent(adError);
                    }

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

                    @Override
                    public void onAdShowedFullScreenContent() {
                        super.onAdShowedFullScreenContent();
                        minterstitialAd = null;
                    }
                });
            }
        });

        final Handler handler = new Handler();
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                if (minterstitialAd != null) {
                    minterstitialAd.show(MainActivity.this);
                } else {
                    Toast.makeText(MainActivity.this, "Load", Toast.LENGTH_SHORT).show();
                }
                handler.postDelayed(this,1000);
            }
        };

        handler.post(runnable);

    }

How to used Rewarded insterstitial

  btns.setOnClickListener(v->{
            if(rewardedInterstitialAd != null){
            rewardedInterstitialAd.show(/* Activity */ ActivityLoadAds.this,/*
    OnUserEarnedRewardListener */ ActivityLoadAds.this);
            }else{
                Toast.makeText(this, "adds not Loaded", Toast.LENGTH_SHORT).show();
            }
        });
    }
    
//    after click button then show video the user watch video and can give a coin
    private void RewardedAdshow(){
            // Use the test ad unit ID to load an ad.
            RewardedInterstitialAd.load(ActivityLoadAds.this, "ca-app-pub-3940256099942544/5354046379",
                    new AdRequest.Builder().build(),  new RewardedInterstitialAdLoadCallback() {
                        @Override
                        public void onAdLoaded(RewardedInterstitialAd ad) {
                            Log.d(TAG, "Ad was loaded.");
                            rewardedInterstitialAd = ad;
                            rewardedInterstitialAd.setFullScreenContentCallback(new FullScreenContentCallback() {
                                @Override
                                public void onAdClicked() {
                                    // Called when a click is recorded for an ad.
                                    Log.d(TAG, "Ad was clicked.");
                                }

                                @Override
                                public void onAdDismissedFullScreenContent() {
                                    // Called when ad is dismissed.
                                    // Set the ad reference to null so you don't show the ad a second time.
                                    Log.d(TAG, "Ad dismissed fullscreen content.");
                                    rewardedInterstitialAd = null;
                                    RewardedAdshow();
                                }

                                @Override
                                public void onAdFailedToShowFullScreenContent(AdError adError) {
                                    // Called when ad fails to show.
                                    Log.e(TAG, "Ad failed to show fullscreen content.");
                                    rewardedInterstitialAd = null;
                                }

                                @Override
                                public void onAdImpression() {
                                    // Called when an impression is recorded for an ad.
                                    Log.d(TAG, "Ad recorded an impression.");
                                }

                                @Override
                                public void onAdShowedFullScreenContent() {
                                    // Called when ad is shown.
                                    Log.d(TAG, "Ad showed fullscreen content.");
                                }
                            });
                        }
                        @Override
                        public void onAdFailedToLoad(LoadAdError loadAdError) {
                            Log.d(TAG, loadAdError.toString());
                            rewardedInterstitialAd = null;
                        }
                    });

        }

    @Override
    public void onUserEarnedReward(@NonNull RewardItem rewardItem) {
        Toast.makeText(this, "User earned reward.", Toast.LENGTH_SHORT).show();
        int i = Integer.parseInt(offertext.getText().toString());
        offertext.setText(String.valueOf(i+1));
        offerimage.setImageResource(R.drawable.ic_launcher_foreground);
    }