• Tapsell Mediation
  • Getting Started
    • Before You Begin
    • Configure Your App
    • Add Google identifier permissions
    • Set Initialization Listener
    • GooglePlay User Privacy
    • GooglePlay Family Policy
    • Add Mediation Adapters
      • Additional Configuration
  • Implementing Ad Formats
    • Banner
      • Add Tapsell Banner Ad Container To Your Layout
      • Load A Banner Ad
      • Show The Loaded Banner Ad
      • Destroy Banner Ad
    • Interstitial
      • Load An Interstitial Ad
      • Show The Loaded Interstitial Ad
    • Rewarded
      • Load A Rewarded Ad
      • Show The Loaded Rewarded Ad
    • AppOpen
    • Native
      • Add Tapsell Native Views To Your Layout
      • Load A Native Ad
      • Show The Loaded Native Ad
      • Destroy Native Ad
    • PreRoll
  • Changelog
  • Test keys

Tapsell Mediation

Tapsell Mediation, is a Mediated solution helping businesses increase their mobile apps’ revenue with the inclusion of other supported Programmatic & Mediated Ad Solutions.

Getting Started

Integrating the Tapsell SDK into your app is the first step toward displaying ads and earning revenue. Once you’ve integrated the SDK, you can choose an ad format (such as native or rewarded video) and follow the steps to implement it.

Before You Begin

To prepare your app, complete the following steps:

• Make sure that your module’s app-level build.gradle file uses a compileSdkVersion of 31 or higher
• Make sure you have set up your app as an Tapsell Mediation app and have your unique Tapsell App ID that is needed later in this guide.

Configure Your App

1. Add the dependencies for the Tapsell Mediation SDK to your module’s app-level build.gradle:

  dependencies {
      def tapsellVersion = "1.0.2-beta02"
      implementation "ir.tapsell.mediation:tapsell:$tapsellVersion" // Mediation
      implementation "ir.tapsell.mediation.adapter:legacy:$tapsellVersion" // Tapsell Adapter
  }

1. Add a manifest placeholder inside your module’s app-level build.gradle providing your Tapsell App ID collected from your dashboard:

  android {
      defaultConfig {
          manifestPlaceholders = [
                  TapsellMediationAppKey: "YOUR_APP_ID",
          ]
      }
  }

Add Google identifier permissions

1. Apps updating their target API level to 33 (Android 13) will need to declare a Google Play services permission in the manifest file as follows:

    <uses-permission android:name="com.google.android.gms.permission.AD_ID"/>
   

Read more about Google Advertising ID changes here.

1. Add the Google Play Services dependencies into the dependencies block of your build.gradle file, to allow GAID (Google Advertising ID) and App Set ID information to be retrieved.

    dependencies { 
        implementation 'com.google.android.gms:play-services-appset:16.0.2' 
        implementation 'com.google.android.gms:play-services-ads-identifier:18.0.1' 
    }
   

No additional configuration or code is needed to initialize the SDK.

Set Initialization Listener

You can set a listener to be notified of the SDK’s initialization. The onInitializationComplete will be called once all the mediation adapters are initialized.

import ir.tapsell.mediation.Tapsell;

public class MainActivity extends AppCompatActivity {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Tapsell.setInitializationListener(() -> {
            // initialization Completed
        });
    }
}

GooglePlay User Privacy

The Tapsell SDK respects the GDPR user privacy policy. Considering this policy is required for the apps published in markets like GooglePlay. All ad networks support the user consent policies as well as Tapsell SDK. The Tapsell mediation SDK manages the user consent for all implemented ad networks automatically. The correct approach to manage the GDPR consent is showing a consent dialog in your application to choose an option by user. After user selection, you need to pass the user consent result to the Tapsell SDK. You can pass the result after initialization is completed by adding the following code:

   Tapsell.setInitializationListener(() -> {
       // initialization Completed
       Tapsell.setUserConsent(activity, true);
   });

To avoid showing consent dialog to the user each time, you can store user preferences to your app. But you need to pass the latest stored user consent to the Tapsell SDK by invoking the above function.

GooglePlay Family Policy

According to the GooglePlay Family Policy, if any of the target audiences for your app is children (especially if you’re developing a game), your app’s content must be appropriate for these type of users. Also, you are not allowed to collect some personal information like Google Advertising ID. However, the third party advertising SDKs need this advertising id to provide and serve personalized ads for users. As a result, in Tapsell SDK all users are treated as 13 or older. So as an application developer if you’re going to publish your app in GooglePlay, you need to express that your app targets audiences with age of 13 or older. Otherwise, your app might be removed from GooglePlay according to this policy.

Add Mediation Adapters

The Tapsell Mediation SDK currently supports the following 3rd-party programmatic & mediated partner SDKs:

• AdMob
• Applovin
• Chartboost
• Fyber (Digital Turbine Exchange)
• Mintegral
• UnityAds
• IronSource
• Liftoff (Vungle)
• Wortise
• Yandex

To integrate, add the adapter dependency you need to your module’s app-level build.gradle:

implementation "ir.tapsell.mediation.adapter:admob:$tapsellVersion"
implementation "ir.tapsell.mediation.adapter:applovin:$tapsellVersion"
implementation "ir.tapsell.mediation.adapter:chartboost:$tapsellVersion"
implementation "ir.tapsell.mediation.adapter:fyber:$tapsellVersion"
implementation "ir.tapsell.mediation.adapter:mintegral:$tapsellVersion"
implementation "ir.tapsell.mediation.adapter:unityads:$tapsellVersion"
implementation "ir.tapsell.mediation.adapter:ironsource:$tapsellVersion"
implementation "ir.tapsell.mediation.adapter:liftoff:$tapsellVersion"
implementation "ir.tapsell.mediation.adapter:wortise:$tapsellVersion"
implementation "ir.tapsell.mediation.adapter:yandex:$tapsellVersion"

Additional Configuration

• Admob

Add a manifest placeholder inside your module’s app-level build.gradle providing your Admob app signature. (Contact Tapsell support for more information):

android {
    defaultConfig {
        manifestPlaceholders = [
                TapsellMediationAdmobAdapterSignature: "YOUR_APP_SIGNATURE",
        ]
    }
}

• Applovin

No additional configuration needed.

• Chartboost

In your project-level build.gradle file, include Chartboost Maven repository:

allprojects {
    repositories {
        maven { url "https://cboost.jfrog.io/artifactory/chartboost-ads" }
        maven { url "https://cboost.jfrog.io/artifactory/chartboost-mediation" }
    }
}

• Fyber

No additional configuration needed.

• Mintegral

In your project-level build.gradle file, include Mintegral Maven repository:

allprojects {
    repositories {
      maven { url 'https://cboost.jfrog.io/artifactory/chartboost-ads' }
      maven { url 'https://dl-maven-android.mintegral.com/repository/mbridge_android_sdk_oversea' }
    }
}

• UnityAds

No additional configuration needed.

• IronSource

allprojects {
    repositories {
        maven { url "https://android-sdk.is.com" }
    }
}

• Liftoff

No additional configuration needed.

• Wortise

In your project-level build.gradle file, include Wortise Maven repository:

allprojects {
    repositories {
      maven { url 'https://maven.wortise.com/artifactory/public' }
      maven { url 'https://artifact.bytedance.com/repository/pangle' }
    }
}

• Yandex

No additional configuration needed.

Implementing Ad Formats

The Tapsell SDK is now imported and you’re ready to implement an ad. Tapsell offers a number of different ad formats, so you can choose the one that best fits your app’s user experience.

Make sure you have created the ad placements (zones) in your app’s dashboard and have the unique id for each zone needed later in this guide.

Banner

Rectangular ads that appear on the device screen usually at the top or bottom. Banner ads stay on screen while users are interacting with the app, and can refresh automatically after a certain period of time. If you’re new to mobile advertising, they’re a great place to start.

This guide shows you how to integrate banner ads from Tapsell into your Android app.

Add Tapsell Banner Ad Container To Your Layout

The first step toward displaying a banner is to place a BannerContainer in the layout of the Activity or Fragment in which you’d like to display it. The easiest way to do this is to add one to the corresponding XML layout file. Here’s an example that shows an activity’s BannerContainer:

<!-- main_activity.xml-->
<!--...-->
<ir.tapsell.mediation.ad.views.banner.BannerContainer
  android:id="@+id/bannerContainerView"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_centerHorizontal="true"
  android:layout_alignParentBottom="true">
</ir.tapsell.mediation.ad.views.banner.BannerContainer>
  <!--...-->

You can alternatively create a BannerContainer programmatically:

import ir.tapsell.mediation.Tapsell;
import ir.tapsell.mediation.ad.views.banner.BannerContainer;

public class MainActivity extends AppCompatActivity {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        BannerContainer container = new BannerContainer(this);
        // TODO: Add adView to your view hierarchy.
    }
}

Load A Banner Ad

Once the BannerContainer is in place, the next step is to load an ad. That’s done with the requestBannerAd() static method in Tapsell class.

public static void requestBannerAd(String zoneId, BannerSize bannerSize, RequestResultListener listener)

BannerSize is an optional enum parameter determining the size of the shown ad, with the following values:

enum BannerSize {
    BANNER_320_50, // Default value if the parameter is not provided
    BANNER_320_90,
    BANNER_320_100,
    BANNER_250_250,
    BANNER_300_250,
    BANNER_468_60,
    BANNER_728_90,
    BANNER_160_600,
    BANNER_ADAPTIVE
}

You need to provide a class implementing the RequestResultListener interface to get the ad load result overriding the success and failure methods:

interface RequestResultListener {
    // Called when the ad is successfully loaded; providing the ad id needed to show the ad 
    void onSuccess(String adId);
    // Called when there is no ad available
    void onFailure();
}

NOTE:
If you intent to load banner ads from UnityAds ad-network, you also need to pass an activity instance using the method below:

public static void requestBannerAd(String zoneId, BannerSize bannerSize, Activity activity, RequestResultListener listener)

Here’s an example that shows how to load an ad in the onCreate() method of an Activity:

import ir.tapsell.mediation.ad.request.BannerSize;
import ir.tapsell.mediation.ad.request.RequestResultListener;
import ir.tapsell.mediation.ad.views.banner.BannerContainer;
import ir.tapsell.mediation.Tapsell;

public class MainActivity extends AppCompatActivity {
    private BannerContainer mBannerContainer;
    private static final String BANNER_AD_ZONE_ID = "SampleZoneId";
    
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mBannerContainer = findViewById(R.id.bannerContainer);
        Tapsell.requestBannerAd(BANNER_AD_ZONE_ID, BannerSize.BANNER_320_50, new RequestResultListener() {
            @Override
            public void onSuccess(@NonNull String adId) {
                // Ad loaded
                // TODO: Show the ad
            }

            @Override
            public void onFailure() {
                // Ad not available
            }
        });
    }
}

Show The Loaded Banner Ad

Once the banner ad is successfully loaded, the next step is to show the ad. That’s done with the showBannerAd() static method in Tapsell class passing the adId received in onSuccess method of the RequestResultListener and the BannerContainer view added to your layout in which you intend to show the ad.

public static void showBannerAd(String adId, BannerContainer container, Activity activity, AdStateListener.Banner listener)

The AdStateListener.Banner optional parameter can be passed to monitor and handle events related to displaying your banner ad. The interface has the following implementation:

AdStateListener.Banner listener = new AdStateListener.Banner() {
    @Override
    public void onAdImpression() {
        // Code to be executed when an impression is recorded for the ad.
    }
    
    @Override
    public void onAdClicked() {
        // Code to be executed when the user clicks on the ad.
    }

    @Override
    public void onAdFailed(String message) {
        // Code to be executed when the ad show fails.
    }
);

Destroy Banner Ad

When you are done showing your banner ad, you should destroy it so that the ad is properly garbage collected. The example below shows the destroy call in the onDestroy() method of an activity:

import ir.tapsell.mediation.Tapsell;

public class MainActivity extends AppCompatActivity {
    @Override
    public void onDestroy() {
        Tapsell.destroyBannerAd(adId);
        super.onDestroy();
    }
}

Interstitial

Interstitial ads are full-screen ads that cover the interface of their host app. They’re typically displayed at natural transition points in the flow of an app, such as between activities or during the pause between levels in a game. When an app shows an interstitial ad, the user has the choice to either tap on the ad and continue to its destination or close it and return to the app.

This guide shows you how to integrate interstitial ads from Tapsell into your Android app.

Load An Interstitial Ad

To load an interstitial ad, call the requestInterstitialAd static method of Tapsell class passing in the zone identifier and a RequestResultListener to receive the loaded ad id or possible failure notice.

public static void requestInterstitialAd(String zoneId, RequestResultListener listener)

The RequestResultListener interface has the following implementation:

interface RequestResultListener {
    // Called when the ad is successfully loaded; providing the ad id needed to show the ad 
    void onSuccess(String adId);
    // Called when there is no ad available
    void onFailure();
}

NOTE:
If you intent to load interstitial ads from Applovin ad-network, you also need to pass an activity instance using the method below:

public static void requestInterstitialAd(String zoneId, Activity activity, RequestResultListener listener)

Here’s an example that shows how to load an ad in the onCreate() method of an Activity:

import ir.tapsell.mediation.ad.request.RequestResultListener;
import ir.tapsell.mediation.Tapsell;

public class MainActivity extends AppCompatActivity {
    private static final String INTERSTITIAL_AD_ZONE_ID = "SampleZoneId";
    
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Tapsell.requestInterstitialAd(INTERSTITIAL_AD_ZONE_ID, new RequestResultListener() {
            @Override
            public void onSuccess(@NonNull String adId) {
                // Ad loaded
                // TODO: Save the loaded ad id to be shown when the time is right
            }

            @Override
            public void onFailure() {
                // Ad not available
            }
        });
    }
}

Show The Loaded Interstitial Ad

Once the interstitial ad is successfully loaded, the next step is to show the ad. Interstitial ads should be displayed during natural pauses in the flow of an app. Between levels of a game is a good example, or after the user completes a task. To do so simply call the showInterstitialAd() static method in Tapsell class passing the adId received in onSuccess method of the RequestResultListener.

public static void showInterstitialAd(String adId, Activity activity, AdStateListener.Interstitial listener)

The AdStateListener.Interstitial optional parameter can be passed to monitor and handle events related to displaying your interstitial ad. The interface has the following implementation:

AdStateListener.Interstitial listener = new AdStateListener.Interstitial() {
    @Override
    public void onAdImpression() {
        // Code to be executed when an impression is recorded for the ad.
    }

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

    @Override
    public void onAdClosed(AdShowCompletionState completionState) {
        // Code to be executed when the full-screen ad is clicked by the user.
    }
    
    @Override
    public void onAdFailed(String message) {
        // Code to be executed when the ad show fails.
    }
);

The AdShowCompletionState passed in onAdClosed callback, indicates whether the ad has been shown completely or skipped by the user before completion.

enum AdShowCompletionState {
    COMPLETED,
    SKIPPED,
    UNKNOWN
}

Rewarded

Rewarded ads are full-screen ads that reward users for watching short videos and interacting with playable ads and surveys. They are used for monetizing free-to-play apps.

This guide shows you how to integrate rewarded ads from Tapsell into your Android app.

Load A Rewarded Ad

Rewarded ads are loaded by calling the requestRewardedAd static method of the Tapsell class; passing in the zone identifier and a RequestResultListener to receive the loaded ad id or possible failure notice. This is usually done in the onCreate() method of an Activity.

public static void requestRewardedAd(String zoneId, RequestResultListener listener)

The RequestResultListener interface has the following implementation:

interface RequestResultListener {
    // Called when the ad is successfully loaded; providing the ad id needed to show the ad 
    void onSuccess(String adId);
    // Called when there is no ad available
    void onFailure();
}

NOTE:
If you intent to load rewarded ads from Applovin ad-network, you also need to pass an activity instance using the method below:

public static void requestRewardedAd(String zoneId, Activity activity, RequestResultListener listener)

Here’s an example that shows how to load an ad in the onCreate() method of an Activity:

import ir.tapsell.mediation.ad.request.RequestResultListener;
import ir.tapsell.mediation.Tapsell;

public class MainActivity extends AppCompatActivity {
    private static final String REWARDED_AD_ZONE_ID = "SampleZoneId";
    
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Tapsell.requestRewardedAd(REWARDED_AD_ZONE_ID, new RequestResultListener() {
            @Override
            public void onSuccess(@NonNull String adId) {
                // Ad loaded
                // TODO: Save the loaded ad id to be shown when the time is right
            }

            @Override
            public void onFailure() {
                // Ad not available
            }
        });
    }
}

Show The Loaded Rewarded Ad

Once the rewarded ad is successfully loaded, the next step is to show the ad. To do so simply call the showRewardedAd() static method in Tapsell class passing the adId received in onSuccess method of the RequestResultListener.

public static void showRewardedAd(String adId, Activity activity, AdStateListener.Rewarded listener)

The AdStateListener.Rewarded optional parameter can be passed to monitor and handle events related to displaying your rewarded ad; specially when the user should be rewarded. The interface has the following implementation:

AdStateListener.Rewarded listener = new AdStateListener.Rewarded() {
    @Override
    public void onAdImpression() {
        // Code to be executed when an impression is recorded for the ad.
    }
        
    @Override
    public void onAdClicked() {
        // Code to be executed when the user clicks on the ad.
    }

    @Override
    public void onAdClosed(AdShowCompletionState completionState) {
        // Code to be executed when the full-screen ad is clicked by the user.
    }
    
    @Override
    public void onRewarded() {
        // Code to be executed when the user has earned the reward.
    }
    
    @Override
    public void onAdFailed(String message) {
        // Code to be executed when the ad show fails.
    }
);

The AdShowCompletionState passed in onAdClosed callback, indicates whether the ad has been shown completely or skipped by the user before completion.

enum AdShowCompletionState {
    COMPLETED,
    SKIPPED,
    UNKNOWN
}

AppOpen

You can find the AppOpen ad implementation details here

Native

Native ads are ad assets that are presented to users through UI components that are native to the platform. They are shown using the same types of views with which you are already building your layouts, and can be formatted to match your app’s visual design.

This guide shows you how to integrate native ads from Tapsell into your Android app.

Add Tapsell Native Views To Your Layout

The first step toward displaying a native ad is to create your ad layout using the same views you use in your application. Note that the design and format of the ad layout is completely in your own hands to match your app’s design. The only thing you need to consider in your layout design is that you must put all your ad layout views inside a NativeAdViewContainer, provided by Tapsell SDK:

• ir.tapsell.mediation.ad.views.ntv.NativeAdViewContainer

  A custom Android FrameLayout that must be used as the parent view of the native ad item views. All your ad views providing the content of the ad, like title view, logo view and so on, must be placed inside a NativeAdViewContainer view.

Here’s an example that shows an ad layout inside the activity layout:

<!----------------------- activity_main.xml -------------------------->

  ...

  <!-- container -->
<ir.tapsell.mediation.ad.views.ntv.NativeAdViewContainer
  android:id="@+id/tapsell_native_ad_container"
  ... >

  <!-- ad layout (a layout of your choice) -->
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">

<!-- logo view -->
<ImageView
  android:id="@+id/tapsell_native_ad_logo"
... />

<!-- title view -->
<TextView
  android:id="@+id/tapsell_native_ad_title"
... />

<!-- description view -->
<TextView
  android:id="@+id/tapsell_native_ad_description"
... />

<!-- sponsored text view -->
<TextView
  android:id="@+id/tapsell_native_ad_sponsored"
... />

<!-- CTA button view -->
<Button
  android:id="@+id/tapsell_native_ad_cta"
... />

<!-- media view -->
<FrameLayout
  android:id="@+id/tapsell_native_ad_media"
... />

</RelativeLayout>

  </ir.tapsell.mediation.ad.views.ntv.NativeAdViewContainer>

As an alternative to adding the ad layout directly to the activity layout, you can only place the NativeAdViewContainer and have your ad layout in a separate layout file, attaching it programmatically. See the sample below:

<!----------------------- activity_main.xml -------------------------->

  ...

  <!-- container -->
<ir.tapsell.mediation.ad.views.ntv.NativeAdViewContainer
  android:id="@+id/tapsell_native_ad_container"
  ... />

  <!----------------------- native_ad.xml -------------------------->

  <!-- ad layout (a layout of your choice) -->
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<!--  ad content views  -->

</RelativeLayout>

import ir.tapsell.mediation.Tapsell;
import ir.tapsell.mediation.ad.views.ntv.NativeAdViewContainer;

public class MainActivity extends AppCompatActivity {
    private NativeAdViewContainer mNativeAdViewContainer;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mNativeAdViewContainer = findViewById(R.id.tapsell_native_ad_container);
        getLayoutInflater().inflate(R.layout.native_ad, mNativeAdViewContainer, true);
    }
}

Load A Native Ad

Once the layout is ready, the next step is to load an ad. That’s done with the requestNativeAd() static method in Tapsell class.

public static void requestNativeAd(String zoneId, RequestResultListener listener)

You need to provide a class implementing the RequestResultListener interface to get the ad load result overriding the success and failure methods:

interface RequestResultListener {
    // Called when the ad is successfully loaded; providing the ad id needed to show the ad 
    void onSuccess(String adId);
    // Called when there is no ad available
    void onFailure();
}

Here’s an example that shows how to load an ad in the onCreate() method of an Activity:

import ir.tapsell.mediation.ad.request.RequestResultListener;
import ir.tapsell.mediation.Tapsell;

public class MainActivity extends AppCompatActivity {
    private BannerContainer mBannerContainer;
    private static final String NATIVE_AD_ZONE_ID = "SampleZoneId";
    
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Tapsell.requestNativeAd(NATIVE_AD_ZONE_ID, new RequestResultListener() {
            @Override
            public void onSuccess(@NonNull String adId) {
                // Ad loaded
                // TODO: Show the ad
            }

            @Override
            public void onFailure() {
                // Ad not available
            }
        });
    }
}

Show The Loaded Native Ad

Once the native ad is successfully loaded, the next step is to show the ad. That’s done with the showNativeAd() static method in Tapsell class passing the adId received in onSuccess method of the RequestResultListener and an instance of NativeAdView populated with the ad views you used in your layout.

public static void showNativeAd(String adId, NativeAdView view, Activity activity, AdStateListener.Native listener)

The NativeAdView is a class you need to instantiate and populate with your ad views using the Builder pattern. Review the sample below for more details:

NativeAdView.Builder(YOUR_CONTAINER_VIEW) // NativeAdViewContainer
    .withLogo(YOUR_LOGO_VIEW) // ImageView
    .withTitle(YOUR_TITLE_VIEW) // TextView
    .withSponsored(YOUR_SPONSORED_TEXT_VIEW) // TextView
    .withDescription(YOUR_DESCRIPTION_VIEW) // TextView
    .withCtaButton(YOUR_CTA_VIEW) // Button
    .withMedia(YOUR_MEDIA_VIEW) // FrameLayout
    .build()

Note that depending on your ad design you can only include and provide a subset of the possible ad items.

The AdStateListener.Native optional parameter can be passed to monitor and handle events related to displaying your native ad. The interface has the following implementation:

AdStateListener.Native listener = new AdStateListener.Native() {
    @Override
    public void onAdImpression() {
        // Code to be executed when an impression is recorded for the ad.
    }
    
    @Override
    public void onAdClicked() {
        // Code to be executed when the user clicks on the ad.
    }

    @Override
    public void onAdFailed(String message) {
        // Code to be executed when the ad show fails.
    }
);

Destroy Native Ad

When you are done showing your native ad, you should destroy it so that the ad is properly garbage collected. The example below shows the destroy call in the onDestroy() method of an activity:

import ir.tapsell.mediation.Tapsell;

public class MainActivity extends AppCompatActivity {
    @Override
    public void onDestroy() {
        Tapsell.destroyNativeAd(adId);
        super.onDestroy();
    }
}

PreRoll

You can find the PreRoll implementation details here

Changelog

You can find the SDK Changelog here

Test keys

To use test app keys and zones, you can refer to this link