Custom Client Bidding Ad

public class CustomSDKInterstitialAdapter extends CustomInterstitialAdapter { 
    ...
}

// Custom ad platform's ad placement ID
String placementId;

@Override
public boolean startBiddingRequest(final Context context, Map serverExtra, Map localExtra, final ATBiddingListener biddingListener) {

    // Get the custom platform's ad placement ID configured in the dashboard from serverExtra.
    placementId = (String) serverExtra.get("unit_id");

    CustomSDKInitManager.getInstance().initSDK(context, serverExtra, new MediationInitCallback() {
        @Override
        public void onSuccess() {

            // Initiate bidding request after the ad platform Initialization succeeds.
            startBid(context, biddingListener);

        }

        @Override
        public void onFail(String errorMsg) {

            // Callback bidding failure through ATBiddingListener.
            if (biddingListener != null) {
            	biddingListener.onC2SBiddingResultWithCache(ATBiddingResult.fail(errorMsg), null);
            }
        }
    });

    // Must return true.
    return true;
} 

...

CustomInterstitialAd customInterstitialAd;

private void startBid(Context context, final ATBiddingListener biddingListener) {
	
	customInterstitialAd = new CustomInterstitialAd(placementId);

	customInterstitialAd.load(placementId, new CustomAdLoadListener() {
    	
    	@Override
    	public void onLoadSuccess() {
    		// Get price
    		double bidPrice = customInterstitialAd.getBidPrice();
    		
    		// Get currency unit
    		ATAdConst.CURRENCY currency = ATAdConst.CURRENCY.USD;
    		if (customInterstitialAd.getCurrency() == "RMB") {
    			currency = ATAdConst.CURRENCY.RMB;
    		}
    		
    		// A unique ID used to identify this bidding. UUID or timestamp can be used.
    		String token = UUID.randomUUID().toString();
    		
    		// Ad bidding related event management class. Can be passed as null.
    		ATBiddingNotice biddingNotice = new CustomSDKBiddingNotice(customInterstitialAd);
    		
    		// Native Ads need to return BaseAd. Other ad formats can pass null.
    		BaseAd basead = null;
    		
    		// Notify Taku SDK of the bidding result.
    		if (biddingListener != null) {
            	biddingListener.onC2SBiddingResultWithCache(
                    ATBiddingResult.success(bidPrice, token, biddingNotice, currency), basead
                );
            }
	
    	}
    		
    	@Override
    	public void onLoadFailed(String errorMsg) {
    		// Notify Taku SDK of the bidding result.
            if (biddingListener != null) {
            	biddingListener.onC2SBiddingResultWithCache(ATBiddingResult.fail(errorMsg), null);
            }
    	}
    	
   });
    
}

...
CustomInterstitialAd customInterstitialAd;

@Override
public boolean isAdReady() {
    if (customInterstitialAd != null) {
        return customInterstitialAd.isReady();
    }
    return false;
}

...
CustomInterstitialAd customInterstitialAd;

@Override
public void show(Activity activity) {
    if (customInterstitialAd != null) {
        
        customInterstitialAd.setEventListener(new CustomAdEventListener() {
            @Override
            public void onAdImpression() {
                // Notify Taku SDK that the ad impression was successful.
                if (mImpressListener != null) {
                    mImpressListener.onInterstitialAdShow();
                }
            }
            
            @Override
            public void onADClicked() {
                // Notify Taku SDK that the ad was clicked.
                if (mImpressListener != null) {
                    mImpressListener.onInterstitialAdClicked();
                }
            }
            
            @Override
            public void onADClicked() {
                // Notify Taku SDK that the ad was closed.
                if (mImpressListener != null) {
                    mImpressListener.onInterstitialAdClose();
                }
            }
            
        });
        
        // Trigger ad display.
        customInterstitialAd.show(activity);
    }
}

public class CustomSDKBiddingNotice implements ATBiddingNotice {

	// Custom ad platform's ad object
	CustomInterstitialAd customInterstitialAd;

    protected GDTATBiddingNotice(CustomInterstitialAd customInterstitialAd) {
        this.customInterstitialAd = customInterstitialAd;
    }

}

@Override
public void notifyBidWin(double costPrice, double secondPrice, Map extra) {
    
    Map map = new HashMap<>();

    map.put(CustomSDK.COST_PRICE, costPrice);
    map.put(CustomSDK.HIGHEST_LOSS_PRICE, secondPrice);

    // Notify bid win.
    customInterstitialAd.sendWinNotification(map);

    customInterstitialAd = null;
}

@Override
public void notifyBidLoss(String lossCode, double winPrice, Map extra) {
        
    // Determine the bid loss reason.
    int lossReason = CustomSDKLossReason.OTHER;
    switch (lossCode) {
        case ATAdConst.BIDDING_TYPE.BIDDING_LOSS_WITH_BIDDING_TIMEOUT:
            lossReason = CustomSDKLossReason.NO_AD;
            break;
        case ATAdConst.BIDDING_TYPE.BIDDING_LOSS_WITH_LOW_PRICE_IN_HB:
        case ATAdConst.BIDDING_TYPE.BIDDING_LOSS_WITH_LOW_PRICE_IN_NORMAL:
            lossReason = CustomSDKLossReason.LOW_PRICE;
            break;
    }


    // Determine the winning channel.
    int adnId = ATInitMediation.getIntFromMap(extra, ATBiddingNotice.ADN_ID, -1);
    switch (adnId) {
        case ATAdConst.BIDDING_ADN_ID.LOSE_TO_NORMAL_IN_SAME_ADN:
            adnId = CustomSDKADNID.NORMAL;
            break;
        case ATAdConst.BIDDING_ADN_ID.LOSE_TO_HB_IN_SAME_ADN:
            adnId = CustomSDKADNID.HB;
            break;
        case ATAdConst.BIDDING_ADN_ID.LOSE_TO_OWN_ADN:
            adnId = CustomSDKADNID.OWN_AD;
            break;
        case ATAdConst.BIDDING_ADN_ID.LOSE_TO_OTHER_ADN:
            adnId = CustomSDKADNID.OTHER;
            break;
    }


    Map map = new HashMap<>();

    map.put(CustomSDK.WIN_PRICE, winPrice);
    map.put(CustomSDK.LOSS_REASON, lossReason);
    map.put(CustomSDK.ADN_ID, adnId);

    // Notify bid loss.
    customInterstitialAd.sendLossNotification(map);

    customInterstitialAd = null;
}