橫幅廣告

橫幅廣告 會顯示在應用程式版面的一部分矩形區塊。錨定式自動調整橫幅廣告的長寬比固定,使用者與應用程式互動時,這類廣告會持續顯示於畫面頂端或底部。

本指南說明如何在 Android 應用程式中載入錨定式自動調整橫幅廣告。

必要條件

一律使用測試廣告進行測試

建構及測試應用程式時,請務必使用測試廣告,而非實際的正式廣告。否則帳戶可能會遭到停權。

如要載入測試廣告,最簡單的方法是使用 Android 橫幅專用的測試廣告單元 ID:

ca-app-pub-3940256099942544/9214589741

這類 ID 經特別設定,可針對每個請求傳回測試廣告。您可在編寫程式碼、測試及偵錯時,將其用於自己的應用程式。發布應用程式前,請務必將測試用 ID 替換為自己的廣告單元 ID。

如要進一步瞭解 Google Mobile Ads SDK (Beta 版) 測試廣告的運作方式,請參閱「啟用測試廣告」。

定義廣告檢視區塊

XML 版面配置

在版面配置 XML 檔案中新增檢視區塊,做為錨定式自動調整橫幅廣告的容器:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

  <FrameLayout
      android:id="@+id/banner_view_container"
      android:layout_width="0dp"
      android:layout_height="wrap_content"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toEndOf="parent"
      app:layout_constraintStart_toStartOf="parent">

  </FrameLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

Jetpack Compose

在 Compose UI 中加入 AndroidView 元素,並定義 mutableStateOf<BannerAd?> 變數來保留橫幅廣告:

// Initialize required variables.
val context = LocalContext.current
var bannerAdState by remember { mutableStateOf<BannerAd?>(null) }

// The AdView is placed at the bottom of the screen.
Column(modifier = modifier.fillMaxSize(), verticalArrangement = Arrangement.Bottom) {
  bannerAdState?.let { bannerAd ->
    Box(modifier = Modifier.fillMaxWidth()) {
      // Display the ad within an AndroidView.
      AndroidView(
        modifier = modifier.wrapContentSize(),
        factory = { bannerAd.getView(requireActivity()) },
      )
    }
  }
}

載入廣告

  1. 使用廣告單元 ID 和錨定自動調整廣告大小,建立 BannerAdRequest 物件。
  2. 呼叫 BannerAd.load()
  3. BannerAd.getView() 新增至檢視區塊階層。

Kotlin

import com.google.android.libraries.ads.mobile.sdk.banner.AdSize
import com.google.android.libraries.ads.mobile.sdk.banner.BannerAd
import com.google.android.libraries.ads.mobile.sdk.banner.BannerAdEventCallback
import com.google.android.libraries.ads.mobile.sdk.banner.BannerAdRefreshCallback
import com.google.android.libraries.ads.mobile.sdk.banner.BannerAdRequest
import com.google.android.libraries.ads.mobile.sdk.common.AdLoadCallback
import com.google.android.libraries.ads.mobile.sdk.common.LoadAdError

class MainActivity : Activity() {

  private var bannerAd: BannerAd? = null
  private lateinit var binding: ActivityMainBinding
  private lateinit var adSize: AdSize
  private lateinit var bannerViewContainer: FrameLayout

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    binding = ActivityMainBinding.inflate(layoutInflater)
    setContentView(binding.root)

    // 320 is a placeholder value. Replace 320 with your banner container width.
    adSize = AdSize.getCurrentOrientationAnchoredAdaptiveBannerAdSize(this, 320)

    // Give the banner container a placeholder height to avoid a sudden layout
    // shifts when the ad loads.
    bannerViewContainer = binding.bannerViewContainer
    val bannerLayoutParams = bannerViewContainer.layoutParams
    bannerLayoutParams.height = adSize.getHeightInPixels(requireContext())
    bannerViewContainer.layoutParams = bannerLayoutParams

    // Step 1 - Create a BannerAdRequest object with ad unit ID and size.
    val adRequest = BannerAdRequest.Builder("ca-app-pub-3940256099942544/9214589741", adSize).build()

    // Step 2 - Load the ad.
    BannerAd.load(
      adRequest,
      object : AdLoadCallback<BannerAd> {
        override fun onAdLoaded(ad: BannerAd) {
          // Assign the loaded ad to the BannerAd object.
          bannerAd = ad
          // Step 3 - Call BannerAd.getView() to get the View and add it
          // to view hierarchy on the UI thread.
          activity?.runOnUiThread {
            binding.bannerViewContainer.addView(ad.getView(requireActivity()))
          }
        }

        override fun onAdFailedToLoad(loadAdError: LoadAdError) {
          bannerAd = null
        }
      },
    )
  }
}

Java

import com.google.android.libraries.ads.mobile.sdk.banner.AdSize;
import com.google.android.libraries.ads.mobile.sdk.banner.BannerAd;
import com.google.android.libraries.ads.mobile.sdk.banner.BannerAdEventCallback;
import com.google.android.libraries.ads.mobile.sdk.banner.BannerAdRefreshCallback;
import com.google.android.libraries.ads.mobile.sdk.banner.BannerAdRequest;
import com.google.android.libraries.ads.mobile.sdk.common.AdLoadCallback;
import com.google.android.libraries.ads.mobile.sdk.common.LoadAdError;

public class MainActivity extends AppCompatActivity {

  private BannerAd bannerAd;
  private ActivityMainBinding binding;
  private AdSize adSize;
  private FrameLayout bannerViewContainer;

  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    binding = ActivityMainBinding.inflate(getLayoutInflater());
    setContentView(binding.getRoot());

    // 320 is a placeholder value. Replace 320 with your banner container width.
    adSize = AdSize.getCurrentOrientationAnchoredAdaptiveBannerAdSize(this, 320);

    // Give the banner container a placeholder height to avoid a sudden layout
    // shifts when the ad loads.
    bannerViewContainer = binding.bannerViewContainer;
    LayoutParams bannerLayoutParams = bannerViewContainer.getLayoutParams();
    bannerLayoutParams.height = adSize.getHeightInPixels(this);
    bannerViewContainer.setLayoutParams(bannerLayoutParams);

    // Step 1 - Create a BannerAdRequest object with ad unit ID and size.
    BannerAdRequest adRequest = new BannerAdRequest.Builder("ca-app-pub-3940256099942544/9214589741",
        adSize).build();

    // Step 2 - Load the ad.
    BannerAd.load(
        adRequest,
        new AdLoadCallback<BannerAd>() {
          @Override
          public void onAdLoaded(@NonNull BannerAd ad) {
            // Assign the loaded ad to the BannerAd object.
            bannerAd = ad;
            // Step 3 - Call BannerAd.getView() to get the View and add it
            // to view hierarchy on the UI thread.
            runOnUiThread(
                () -> binding.bannerViewContainer.addView(ad.getView(MainActivity.this)));
          }

          @Override
          public void onAdFailedToLoad(@NonNull LoadAdError adError) {
            bannerAd = null;
          }
        });
  }
}

Jetpack Compose

// Request an anchored adaptive banner with a width of 360.
val adSize = AdSize.getCurrentOrientationAnchoredAdaptiveBannerAdSize(requireContext(), 360)

// Load the ad when the screen is active.
val coroutineScope = rememberCoroutineScope()
val isPreviewMode = LocalInspectionMode.current
LaunchedEffect(context) {
  bannerAdState?.destroy()
  if (!isPreviewMode) {
    coroutineScope.launch {
      when (val result = BannerAd.load(BannerAdRequest.Builder(AD_UNIT_ID, adSize).build())) {
        is AdLoadResult.Success -> {
          bannerAdState = result.ad
        }
        is AdLoadResult.Failure -> {
          showToast("Banner failed to load.")
          Log.w(Constant.TAG, "Banner ad failed to load: $result.error")
        }
      }
    }
  }
}

重新整理廣告

如已設定廣告單元重新整理功能,廣告載入失敗時,就不需要請求其他廣告。Google Mobile Ads SDK (Beta 版) 會套用您在 AdMob UI 指定的重新整理頻率。如果您未啟用重新整理功能,請發出新請求。如要進一步瞭解廣告單元的重新整理功能,例如怎麼設定重新整理頻率,請參閱「使用橫幅廣告的自動重新整理功能」。

釋出廣告資源

放送完橫幅廣告後,您可以釋出橫幅廣告的資源。

如要釋出廣告資源,請從檢視區塊階層移除廣告,並捨棄所有參照項目:

Kotlin

// Remove banner from view hierarchy.
val parentView = adView?.parent
if (parentView is ViewGroup) {
  parentView.removeView(adView)
}

// Destroy the banner ad resources.
adView?.destroy()

// Drop reference to the banner ad.
adView = null

Java

// Remove banner from view hierarchy.
if (adView.getParent() instanceof ViewGroup) {
  ((ViewGroup) adView.getParent()).removeView(adView);
}
// Destroy the banner ad resources.
adView.destroy();
// Drop reference to the banner ad.
adView = null;

Jetpack Compose


// Destroy the ad when the screen is disposed.
DisposableEffect(Unit) { onDispose { bannerAdState?.destroy() } }

廣告事件

您可以監聽廣告生命週期中的多種事件,包括廣告曝光和點擊,以及廣告開啟和關閉。建議您先設定回呼,再顯示橫幅廣告。

Kotlin

BannerAd.load(
  BannerAdRequest.Builder("ca-app-pub-3940256099942544/9214589741", adSize).build(),
  object : AdLoadCallback<BannerAd> {
    override fun onAdLoaded(ad: BannerAd) {
      ad.adEventCallback =
        object : BannerAdEventCallback {
          override fun onAdImpression() {
            // Banner ad recorded an impression.
          }

          override fun onAdClicked() {
            // Banner ad recorded a click.
          }

          override fun onAdShowedFullScreenContent() {
            // Banner ad showed.
          }

          override fun onAdDismissedFullScreenContent() {
            // Banner ad dismissed.
          }

          override fun onAdFailedToShowFullScreenContent(
            fullScreenContentError: FullScreenContentError
          ) {
            // Banner ad failed to show.
          }
        }
    }
    // ...
  }
)

Java

BannerAd.load(
    new BannerAdRequest.Builder("ca-app-pub-3940256099942544/9214589741", adSize).build(),
    new AdLoadCallback<BannerAd>() {
      @Override
      public void onAdLoaded(@NonNull BannerAd ad) {
        ad.setAdEventCallback(new BannerAdEventCallback() {
          @Override
          public void onAdImpression() {
            // Banner ad recorded an impression.
          }

          @Override
          public void onAdClicked() {
            // Banner ad recorded a click.
          }

          @Override
          public void onAdShowedFullScreenContent() {
            // Banner ad showed.
          }

          @Override
          public void onAdDismissedFullScreenContent() {
            // Banner ad dismissed.
          }

          @Override
          public void onAdFailedToShowFullScreenContent(
              @NonNull FullScreenContentError fullScreenContentError) {
            // Banner ad failed to show.
          }
        });

        // ...
      }
    });

廣告重新整理回呼

如果您使用橫幅廣告的自動重新整理功能,BannerAdRefreshCallback 會處理廣告重新整理事件。請務必先設定回呼,再將廣告檢視區塊加入檢視區塊階層。如要進一步瞭解廣告重新整理功能,請參閱「重新整理廣告」。

Kotlin

BannerAd.load(
  BannerAdRequest.Builder("ca-app-pub-3940256099942544/9214589741", adSize).build(),
  object : AdLoadCallback<BannerAd> {
    override fun onAdLoaded(ad: BannerAd) {
      ad.bannerAdRefreshCallback =
        object : BannerAdRefreshCallback {
          // Set the ad refresh callbacks.
          override fun onAdRefreshed() {
            // Called when the ad refreshes.
          }

          override fun onAdFailedToRefresh(loadAdError: LoadAdError) {
            // Called when the ad fails to refresh.
          }
        }

      // ...
    }
  }
)

Java

BannerAd.load(
    new BannerAdRequest.Builder("ca-app-pub-3940256099942544/9214589741", adSize).build(),
    new AdLoadCallback<BannerAd>() {
      @Override
      public void onAdLoaded(@NonNull BannerAd ad) {
        ad.setBannerAdRefreshCallback(
            // Set the ad refresh callbacks.
            new BannerAdRefreshCallback() {
              @Override
              public void onAdRefreshed() {
                // Called when the ad refreshes.
              }

              @Override
              public void onAdFailedToRefresh(@NonNull LoadAdError adError) {
                // Called when the ad fails to refresh.
              }
            });
        // ...
      }
    });

影片廣告的硬體加速功能

為確保橫幅廣告檢視區塊的影片廣告順利顯示,請務必啟用硬體加速

硬體加速功能預設為啟用,但部分應用程式可能會選擇停用。如果您的應用程式停用硬體加速,對於會使用廣告的 Activity 類別,建議您啟用這項功能。

啟用硬體加速功能

如果啟用全域硬體加速,會使應用程式無法正常運作,可針對個別活動啟用這項功能。如要啟用或停用硬體加速,請在 AndroidManifest.xml 中,針對 <application><activity> 元素使用 android:hardwareAccelerated 屬性。請參考以下範例,為整個應用程式啟用硬體加速,但對特定活動停用該功能:

<application android:hardwareAccelerated="true">
    <!-- For activities that use ads, hardwareAcceleration should be true. -->
    <activity android:hardwareAccelerated="true" />
    <!-- For activities that don't use ads, hardwareAcceleration can be false. -->
    <activity android:hardwareAccelerated="false" />
</application>

請參閱硬體加速指南,進一步瞭解硬體加速的控管選項。請注意,如果活動沒有啟用硬體加速功能,就無法為個別廣告檢視區塊啟用,因此活動必須啟用硬體加速。

請下載並執行範例應用程式,瞭解如何使用 Google Mobile Ads SDK (Beta 版)。