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This post has main code snippet and not complete file, This would give a overview of how to use multiple ads together. [b]Integrating MoPub + Amazon Ads + Admob[/b] public class MainActivity extends Activity implements MoPubView.BannerAdListener,com.amazon.device.ads.AdListener,com.google.ads.AdListener{ private static String MY_LOG_TAG = "amzmopub"; private MoPubView moPubView; private static final String APP_ID = "sample-app-v1_pub-2"; // Sample App Key. Replace this variable with your App Key private ViewGroup adViewContainer; // View group to which the ad view will be added private AdLayout amzAdView; // A placeholder for the next ad so we can keep the current ad visible while the next ad loads Context context; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); /** * Mopub */ moPubView = (MoPubView) findViewById(R.id.moadview); moPubView.setAdUnitId("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"); // Enter your Ad Unit ID from www.mopub.com moPubView.loadAd(); moPubView.setBannerAdListener(this); /** * Amazon */ adViewContainer = (ViewGroup)findViewById(R.id.root_layout); AdRegistration.enableLogging(true); AdRegistration.enableTesting(true); try { AdRegistration.setAppKey(APP_ID); } catch (Exception e) { Log.e(LOG_TAG, "Exception thrown: " + e.toString()); return; } LoadAd(); /** * Google */ AdRequest request = new AdRequest(); request.addTestDevice(AdRequest.TEST_EMULATOR); AdView adView = (AdView)this.findViewById(R.id.adView); adView.loadAd(request); } private void LoadAd() { if (amzAdView == null) { // Create and configure a new ad if the next ad doesn't currently exist amzAdView = new AdLayout(this, AdSize.SIZE_320x50); float scale = this.getApplicationContext().getResources().getDisplayMetrics().density; FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams((int) (320 * scale), (int) (50 * scale), Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL); amzAdView.setLayoutParams(layoutParams); // Register our ad handler that will receive call-backs for state changes during the ad life cycle amzAdView.setListener(this); } // Load the ad with the appropriate ad options. AdTargetingOptions adOptions = new AdTargetingOptions(); amzAdView.loadAd(adOptions); } ... @Override public void onAdLoaded(AdLayout adLayout, AdProperties adProperties) { Log.d(LOG_TAG, adProperties.getAdType().toString() + " Ad loaded successfully."); adViewContainer.addView(amzAdView); } ----------------------------------------activity_main.xml------------------------------------------ -------------------------------------Loading Ads from Multiple SDKs----------------------------------------- https://developer.amazon.com/sdk/mobileads/with-other-sdks.html

I ended up implementing a custom fallback class similar to the one at https://developer.amazon.com/public/apis/earn/mobile-ads/docs/with-other-sdks. I created one for MoPub, and a similar one for Admob. It doesn't support one of my original concerns - starting all traffic in MoPub (for tracking purposes and to be able to update traffic without re-releasing app), but it gets the job done and isn't too complex.

Would you mind uploading the files to github?