优化自定义标签页

适用于广告的 WebView API 可让 CustomTabSession 中的代码使用应用信号，从而帮助提供内容的网站发布商提升创收效果，并保护广告客户免受垃圾内容的侵扰。

运作方式

与新一代移动广告 SDK 的通信仅在响应由以下任一因素触发的广告事件时发生：

新一代移动广告 SDK 通过打开与 Android 框架提供的 CustomTabsSession 的 postMessage 渠道来促进通信。

前提条件

将应用 ID 传递给 SDK

如果您已有 Ad Manager 应用 ID，请使用现有应用 ID 初始化新一代移动广告 SDK 。

如果您没有 Ad Manager 应用 ID，请在初始化新一代移动广告 SDK 时传入 InitializationConfig.WEBVIEW_APIS_FOR_ADS_APPLICATION_ID 作为应用 ID：

Kotlin

MobileAds.initialize(
    this@MainActivity,
    // Use this application ID to initialize the 
  
    Next Gen Mobile Ads SDK
  
 if
    // you don't have an Ad Manager application ID.
    InitializationConfig.Builder(InitializationConfig.WEBVIEW_APIS_FOR_ADS_APPLICATION_ID)
        .build(),
  ) {
    // Adapter initialization complete.
  }

Java

MobileAds.initialize(
    this,
    // Use this application ID to initialize the 
  
    Next Gen Mobile Ads SDK
  
 if
    // you don't have an Ad Manager application ID.
    new InitializationConfig.Builder(InitializationConfig.WEBVIEW_APIS_FOR_ADS_APPLICATION_ID)
        .build(),
        initializationStatus -> {
          // Adapter initialization is complete.
          });

实现

在 Chrome 自定义标签页实现中，修改 onCustomTabsServiceConnected() 回调中的代码。将 newSession() 替换为 MobileAds.registerCustomTabsSession()。这会建立与 postMessage 渠道的连接，以使用 SDK 信号丰富广告代码。需要使用 Digital Asset Link 来连接 postMessage 渠道。您可以选择设置 CustomTabsCallback 参数，以监听 Chrome 自定义标签页事件。

您应该仍然能够发送来自新一代移动广告 SDK 的 CustomTabsSession 接收消息，但当 SDK 请求覆盖现有通道的新通道时，端口可能会发生变化。

以下代码段展示了如何使用新一代移动广告 SDK 注册 CustomTabsSession：

Kotlin

import com.google.android.libraries.ads.mobile.sdk.MobileAds

class MainActivity : ComponentActivity() {
  private var customTabsClient: CustomTabsClient? = null
  private var customTabsSession: CustomTabsSession? = null

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    // Get the default browser package name, this will be null if
    // the default browser does not provide a CustomTabsService.
    val packageName = CustomTabsClient.getPackageName(applicationContext, null);
    if (packageName == null) {
      // Do nothing as service connection is not supported.
      return
    }

    CustomTabsClient.bindCustomTabsService(
      applicationContext,
      packageName,
      object : CustomTabsServiceConnection() {
        override fun onCustomTabsServiceConnected(
          name: ComponentName, client: CustomTabsClient,
          ) {
            customTabsClient = client

            // Warm up the browser process.
            customTabsClient?.warmup(0L)
            // Create a new browser session using the 
  
    Next Gen Mobile Ads SDK
  
.
            customTabsSession = MobileAds.INSTANCE.registerCustomTabsSession(
              client,
              // Checks the "Digital Asset Link" to connect the postMessage channel.
              ORIGIN,
              // Optional parameter to receive the delegated callbacks.
              customTabsCallback
            )

            // Create a new browser session if the 
  
    Next Gen Mobile Ads SDK
  
 is
            // unable to create one.
            if (customTabsSession == null) {
              customTabsSession = client.newSession(customTabsCallback)
            }

            // Pass the custom tabs session into the intent.
            val customTabsIntent = CustomTabsIntent.Builder(customTabsSession).build()
            customTabsIntent.launchUrl(this@MainActivity,
                                      Uri.parse("YOUR_URL"))
          }

          override fun onServiceDisconnected(componentName: ComponentName) {
            // Remove the custom tabs client and custom tabs session.
            customTabsClient = null
            customTabsSession = null
          }
      })
  }

  // Listen for events from the CustomTabsSession delegated by the 
  
    Next Gen Mobile Ads SDK
  
.
  private val customTabsCallback: CustomTabsCallback = object : CustomTabsCallback() {
    @Synchronized
    override fun onNavigationEvent(navigationEvent: Int, extras: Bundle?) {
      // Called when a navigation event happens.
    }

    @Synchronized
    override fun onMessageChannelReady(extras: Bundle?) {
      // Called when the channel is ready for sending and receiving messages on both
      // ends.
      // This frequently happens, such as each time the SDK requests a
      // new channel.
    }

    @Synchronized
    override fun onPostMessage(message: String, extras: Bundle?) {
      // Called when a tab controlled by this CustomTabsSession has sent a postMessage.
    }

    override fun onRelationshipValidationResult(
      relation: Int, requestedOrigin: Uri, result: Boolean, extras: Bundle?
    ) {
      // Called when a relationship validation result is available.
    }

    override fun onActivityResized(height: Int, width: Int, extras: Bundle) {
      // Called when the tab is resized.
    }

    override fun extraCallback(callbackName: String, args: Bundle?) {

    }

    override fun extraCallbackWithResult(callbackName: String, args: Bundle?): Bundle? {
      return null
    }
  }

  companion object {
    // Replace this URL with an associated website.
    const val ORIGIN = "https://www.google.com"
  }
}

Java

import com.google.android.libraries.ads.mobile.sdk.MobileAds;

class MainActivity extends ComponentActivity {
  // Replace this URL with an associated website.
  private static final String ORIGIN = "https://www.google.com";
  private CustomTabsClient customTabsClient;
  private CustomTabsSession customTabsSession;

  @Override
  protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Get the default browser package name, this will be null if
    // the default browser does not provide a CustomTabsService.
    String packageName = CustomTabsClient.getPackageName(getApplicationContext(), null);
    if (packageName == null) {
      // Do nothing as service connection is not supported.
      return;
    }

    CustomTabsClient.bindCustomTabsService(
        getApplicationContext(),
        packageName,
        new CustomTabsServiceConnection() {
          @Override
          public void onCustomTabsServiceConnected(@NonNull ComponentName name,
              @NonNull CustomTabsClient client) {
            customTabsClient = client;

            // Warm up the browser process.
            customTabsClient.warmup(0);
            // Create a new browser session using the 
  
    Next Gen Mobile Ads SDK
  
.
            customTabsSession = MobileAds.INSTANCE.registerCustomTabsSession(
                client,
                // Checks the "Digital Asset Link" to connect the postMessage channel.
                ORIGIN,
                // Optional parameter to receive the delegated callbacks.
                customTabsCallback);

            // Create a new browser session if the 
  
    Next Gen Mobile Ads SDK
  
 is
            // unable to create one.
            if (customTabsSession == null) {
              customTabsSession = client.newSession(customTabsCallback);
            }

            // Pass the custom tabs session into the intent.
            CustomTabsIntent intent = new CustomTabsIntent.Builder(customTabsSession).build();
            intent.launchUrl(MainActivity.this, Uri.parse("YOUR_URL"));
          }

          @Override
          public void onServiceDisconnected(ComponentName componentName) {
            // Remove the custom tabs client and custom tabs session.
            customTabsClient = null;
            customTabsSession = null;
          }
        }

    );
  }

  // Listen for events from the CustomTabsSession delegated by the 
  
    Next Gen Mobile Ads SDK
  
.
  private final CustomTabsCallback customTabsCallback = new CustomTabsCallback() {
    @Override
    public void onNavigationEvent(int navigationEvent, @Nullable Bundle extras) {
      // Called when a navigation event happens.
      super.onNavigationEvent(navigationEvent, extras);
    }

    @Override
    public void onMessageChannelReady(@Nullable Bundle extras) {
      // Called when the channel is ready for sending and receiving messages on both
      // ends.
      // This frequently happens, such as each time the SDK requests a
      // new channel.
      super.onMessageChannelReady(extras);
    }

    @Override
    public void onPostMessage(@NonNull String message, @Nullable Bundle extras) {
      // Called when a tab controlled by this CustomTabsSession has sent a postMessage.
      super.onPostMessage(message, extras);
    }

    @Override
    public void onRelationshipValidationResult(int relation, @NonNull Uri requestedOrigin,
        boolean result, @Nullable Bundle extras) {
      // Called when a relationship validation result is available.
      super.onRelationshipValidationResult(relation, requestedOrigin, result, extras);
    }

    @Override
    public void onActivityResized(int height, int width, @NonNull Bundle extras) {
      // Called when the tab is resized.
      super.onActivityResized(height, width, extras);
    }

    @Override
    public void extraCallback(@NonNull String callbackName, @Nullable Bundle args) {
      super.extraCallback(callbackName, args);
    }

    @Nullable
    @Override
    public Bundle extraCallbackWithResult(@NonNull String callbackName, @Nullable Bundle args) {
      return super.extraCallbackWithResult(callbackName, args);
    }
  };
}