加载原生广告时，Google 移动广告 SDK（Beta 版）会针对相应广告格式调用监听器。然后，就由您的应用负责展示广告了，尽管不一定要立即展示广告。为了更轻松地展示系统定义的广告格式，该 SDK 提供了一些实用资源，如下所述。
定义 NativeAdView 类
定义一个 NativeAdView 类。此类是 ViewGroup 类，也是 NativeAdView 类的顶级容器。每个原生广告视图都包含原生广告素材资源，例如 MediaView 视图元素或 Title 视图元素，这些素材资源必须是 NativeAdView 对象的子对象。
XML 布局
将一个 XML NativeAdView 添加到您的项目中：
<com.google.android.libraries.ads.mobile.sdk.nativead.NativeAdView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical">
<LinearLayout
android:orientation="horizontal">
<ImageView
android:id="@+id/ad_app_icon" />
<TextView
android:id="@+id/ad_headline" />
</LinearLayout>
<!--Add remaining assets such as the image and media view.-->
</LinearLayout>
</com.google.android.libraries.ads.mobile.sdk.nativead.NativeAdView>
Jetpack Compose
包含 JetpackComposeDemo/compose-util 模块，该模块提供用于编写 NativeAdView 及其素材资源的辅助程序。
使用 compose-util 模块编写一个 NativeAdView：
import com.google.android.gms.compose_util.NativeAdAttribution
import com.google.android.gms.compose_util.NativeAdView
@Composable
/** Display a native ad with a user defined template. */
fun DisplayNativeAdView(nativeAd: NativeAd) {
NativeAdView {
// Display the ad attribution.
NativeAdAttribution(text = context.getString("Ad"))
// Add remaining assets such as the image and media view.
}
}
处理已加载的原生广告
加载原生广告时，处理回调事件，膨胀原生广告视图，并将其添加到视图层次结构中：
Kotlin
// Build an ad request with native ad options to customize the ad.
val adTypes = listOf(NativeAd.NativeAdType.NATIVE)
val adRequest = NativeAdRequest
.Builder("ca-app-pub-3940256099942544/2247696110", adTypes)
.build()
val adCallback =
object : NativeAdLoaderCallback {
override fun onNativeAdLoaded(nativeAd: NativeAd) {
activity?.runOnUiThread {
val nativeAdBinding = NativeAdBinding.inflate(layoutInflater)
val adView = nativeAdBinding.root
val frameLayout = myActivityLayout.nativeAdPlaceholder
// Populate and register the native ad asset views.
displayNativeAd(nativeAd, nativeAdBinding)
// Remove all old ad views and add the new native ad
// view to the view hierarchy.
frameLayout.removeAllViews()
frameLayout.addView(adView)
}
}
}
// Load the native ad with our request and callback.
NativeAdLoader.load(adRequest, adCallback)
Java
// Build an ad request with native ad options to customize the ad.
List<NativeAd.NativeAdType> adTypes = Arrays.asList(NativeAd.NativeAdType.NATIVE);
NativeAdRequest adRequest = new NativeAdRequest
.Builder("ca-app-pub-3940256099942544/2247696110", adTypes)
.build();
NativeAdLoaderCallback adCallback = new NativeAdLoaderCallback() {
@Override
public void onNativeAdLoaded(NativeAd nativeAd) {
if (getActivity() != null) {
getActivity()
.runOnUiThread(() -> {
// Inflate the native ad view and add it to the view hierarchy.
NativeAdBinding nativeAdBinding = NativeAdBinding.inflate(getLayoutInflater());
NativeAdView adView = (NativeAdView) nativeAdBinding.getRoot();
FrameLayout frameLayout = myActivityLayout.nativeAdPlaceholder;
// Populate and register the native ad asset views.
displayNativeAd(nativeAd, nativeAdBinding);
// Remove all old ad views and add the new native ad
// view to the view hierarchy.
frameLayout.removeAllViews();
frameLayout.addView(adView);
});
}
}
};
// Load the native ad with our request and callback.
NativeAdLoader.load(adRequest, adCallback);
请注意，对于指定的原生广告，应在 NativeAdView 布局内呈现所有素材资源。当在原生广告视图布局外呈现原生广告素材资源时，Google 移动广告 SDK（Beta 版）就会尝试在日志中记录一条警告。
广告视图类还提供了注册每项素材资源所用的视图时会用到的方法，并提供了一个用于注册 NativeAd 对象本身的方法。如果以这种方式注册视图，该 SDK 就可以自动处理诸如以下任务：
- 记录点击次数
- 在第一个像素出现在屏幕上时记录展示次数
- 显示广告选项叠加层
展示原生广告
以下示例演示了如何展示原生广告：
Kotlin
private fun displayNativeAd(nativeAd: NativeAd, nativeAdBinding : NativeAdBinding) {
// Set the native ad view elements.
val nativeAdView = nativeAdBinding.root
nativeAdView.advertiserView = nativeAdBinding.adAdvertiser
nativeAdView.bodyView = nativeAdBinding.adBody
nativeAdView.callToActionView = nativeAdBinding.adCallToAction
nativeAdView.headlineView = nativeAdBinding.adHeadline
nativeAdView.iconView = nativeAdBinding.adAppIcon
nativeAdView.priceView = nativeAdBinding.adPrice
nativeAdView.starRatingView = nativeAdBinding.adStars
nativeAdView.storeView = nativeAdBinding.adStore
// Set the view element with the native ad assets.
nativeAdBinding.adAdvertiser.text = nativeAd.advertiser
nativeAdBinding.adBody.text = nativeAd.body
nativeAdBinding.adCallToAction.text = nativeAd.callToAction
nativeAdBinding.adHeadline.text = nativeAd.headline
nativeAdBinding.adAppIcon.setImageDrawable(nativeAd.icon?.drawable)
nativeAdBinding.adPrice.text = nativeAd.price
nativeAd.starRating?.toFloat().let { value ->
nativeAdBinding.adStars.rating = value
}
nativeAdBinding.adStore.text = nativeAd.store
// Hide views for assets that don't have data.
nativeAdBinding.adAdvertiser.visibility = getAssetViewVisibility(nativeAd.advertiser)
nativeAdBinding.adBody.visibility = getAssetViewVisibility(nativeAd.body)
nativeAdBinding.adCallToAction.visibility = getAssetViewVisibility(nativeAd.callToAction)
nativeAdBinding.adHeadline.visibility = getAssetViewVisibility(nativeAd.headline)
nativeAdBinding.adAppIcon.visibility = getAssetViewVisibility(nativeAd.icon)
nativeAdBinding.adPrice.visibility = getAssetViewVisibility(nativeAd.price)
nativeAdBinding.adStars.visibility = getAssetViewVisibility(nativeAd.starRating)
nativeAdBinding.adStore.visibility = getAssetViewVisibility(nativeAd.store)
// Inform Google Mobile Ads SDK (beta) that you have finished populating
// the native ad views with this native ad.
nativeAdView.registerNativeAd(nativeAd, nativeAdBinding.adMedia)
}
/**
* Determines the visibility of an asset view based on the presence of its asset.
*
* @param asset The native ad asset to check for nullability.
* @return [View.VISIBLE] if the asset is not null, [View.INVISIBLE] otherwise.
*/
private fun getAssetViewVisibility(asset: Any?): Int {
return if (asset == null) View.INVISIBLE else View.VISIBLE
}
Java
private void displayNativeAd(ad: NativeAd, nativeAdBinding : NativeAdBinding) {
// Set the native ad view elements.
NativeAdView nativeAdView = nativeAdBinding.getRoot();
nativeAdView.setAdvertiserView(nativeAdBinding.adAdvertiser);
nativeAdView.setBodyView(nativeAdBinding.adBody);
nativeAdView.setCallToActionView(nativeAdBinding.adCallToAction);
nativeAdView.setHeadlineView(nativeAdBinding.adHeadline);
nativeAdView.setIconView(nativeAdBinding.adAppIcon);
nativeAdView.setPriceView(nativeAdBinding.adPrice);
nativeAdView.setStarRatingView(nativeAdBinding.adStars);
nativeAdView.setStoreView(nativeAdBinding.adStore);
// Set the view element with the native ad assets.
nativeAdBinding.adAdvertiser.setText(nativeAd.getAdvertiser());
nativeAdBinding.adBody.setText(nativeAd.getBody());
nativeAdBinding.adCallToAction.setText(nativeAd.getCallToAction());
nativeAdBinding.adHeadline.setText(nativeAd.getHeadline());
if (nativeAd.getIcon() != null) {
nativeAdBinding.adAppIcon.setImageDrawable(nativeAd.getIcon().getDrawable());
}
nativeAdBinding.adPrice.setText(nativeAd.getPrice());
if (nativeAd.getStarRating() != null) {
nativeAdBinding.adStars.setRating(nativeAd.getStarRating().floatValue());
}
nativeAdBinding.adStore.setText(nativeAd.getStore());
// Hide views for assets that don't have data.
nativeAdBinding.adAdvertiser.setVisibility(getAssetViewVisibility(nativeAd.getAdvertiser()));
nativeAdBinding.adBody.setVisibility(getAssetViewVisibility(nativeAd.getBody()));
nativeAdBinding.adCallToAction.setVisibility(getAssetViewVisibility(nativeAd.getCallToAction()));
nativeAdBinding.adHeadline.setVisibility(getAssetViewVisibility(nativeAd.getHeadline()));
nativeAdBinding.adAppIcon.setVisibility(getAssetViewVisibility(nativeAd.getIcon()));
nativeAdBinding.adPrice.setVisibility(getAssetViewVisibility(nativeAd.getPrice()));
nativeAdBinding.adStars.setVisibility(getAssetViewVisibility(nativeAd.getStarRating()));
nativeAdBinding.adStore.setVisibility(getAssetViewVisibility(nativeAd.getStore()));
// Inform Google Mobile Ads SDK (beta) that you have finished populating
// the native ad views with this native ad.
nativeAdView.registerNativeAd(nativeAd, nativeAdBinding.adMedia);
}
/**
* Determines the visibility of an asset view based on the presence of its asset.
*
* @param asset The native ad asset to check for nullability.
* @return {@link View#VISIBLE} if the asset is not null, {@link View#INVISIBLE} otherwise.
*/
private int getAssetViewVisibility(Object asset) {
return (asset == null) ? View.INVISIBLE : View.VISIBLE;
}
“广告选项”叠加层
该 SDK 会向每个广告视图中添加一个“广告选项”叠加层。请在原生广告视图中任选您喜欢的一角留出空间，用于展示自动插入的“广告选项”徽标。此外，广告选项叠加层一定要显眼易见，因此请选择适当的背景颜色和图片。如需详细了解此叠加层的外观和功能，请参阅原生广告字段说明。
广告标示
您必须展示广告标示，以指明相应视图是广告。请参阅我们的政策指南了解详情。
处理点击
请勿在原生广告视图之上或内部的任何视图上实现任何自定义点击处理程序。只要您正确填充和注册素材资源视图，SDK 就会处理广告视图素材资源上的点击。
若要监听点击，请实现 Google 移动广告 SDK（Beta 版）点击回调函数：
Kotlin
private fun setEventCallback(nativeAd: NativeAd) {
nativeAd.adEventCallback =
object : NativeAdEventCallback {
override fun onAdClicked() {
Log.d(Constant.TAG, "Native ad recorded a click.")
}
}
}
Java
private void setEventCallback(NativeAd nativeAd) {
nativeAd.setAdEventCallback(new NativeAdEventCallback() {
@Override
public void onAdClicked() {
Log.d(Constant.TAG, "Native ad recorded a click.");
}
});
}
ImageScaleType
MediaView 类在显示图片时具有 ImageScaleType 属性。如果您想更改 MediaView 中图片的缩放方式，请使用 MediaView 的 setImageScaleType() 方法设置相应的 ImageView.ScaleType：
Kotlin
nativeAdViewBinding.mediaView.imageScaleType = ImageView.ScaleType.CENTER_CROP
Java
nativeAdViewBinding.mediaView.setImageScaleType(ImageView.ScaleType.CENTER_CROP);
MediaContent
MediaContent 类包含与原生广告的媒体内容相关的数据，媒体内容则通过 MediaView 类展示。使用 MediaContent 实例设置 MediaView mediaContent 属性时：
如果有视频素材资源可用，则系统会对其进行缓冲，并开始在
MediaView内播放。您可以通过检查hasVideoContent()来判断是否有视频素材资源。如果广告不包含视频素材资源，则会改为下载
mainImage素材资源，并将其放置在MediaView内。
销毁广告
展示完原生广告后，应将其销毁。以下示例销毁了一个原生广告：
Kotlin
nativeAd.destroy()
Java
nativeAd.destroy();
后续步骤
探索以下主题：
示例
下载并运行示例应用，该应用演示了如何使用 Google 移动广告 SDK（Beta 版）。