Refreshable mediated ads

PrivacySandboxKotlin/build.gradle

@@ -20,7 +20,7 @@ buildscript {
     ext.privacy_sandbox_activity_version = "1.0.0-alpha01"
     ext.privacy_sandbox_sdk_runtime_version = "1.0.0-alpha14"
     ext.privacy_sandbox_tools_version = "1.0.0-alpha09"
-    ext.privacy_sandbox_ui_version = "1.0.0-alpha09"
+    ext.privacy_sandbox_ui_version = "1.0.0-alpha12"
     repositories {
         mavenCentral()
     }

PrivacySandboxKotlin/client-app/build.gradle

@@ -27,8 +27,7 @@ android {
     defaultConfig {
         applicationId "com.example.privacysandbox.client"
         minSdkVersion 21
-        compileSdk 34
-        compileSdkExtension 12
+        compileSdk 35
         targetSdkVersion 34
         versionCode 2
         versionName "1.01"

PrivacySandboxKotlin/client-app/src/main/java/com/example/client/MainActivity.kt

@@ -70,7 +70,8 @@ class MainActivity : AppCompatActivity() {
     enum class MediationOption {
         NONE,
         RUNTIME_MEDIATEE,
-        INAPP_MEDIATEE
+        INAPP_MEDIATEE,
+        REFRESH_MEDIATED_ADS
     }
 
     override fun onCreate(savedInstanceState: Bundle?) {

PrivacySandboxKotlin/client-app/src/main/res/values/mediation_options.xml

@@ -20,5 +20,6 @@
         <item>No Mediation</item>
         <item>Runtime-Runtime Mediation</item>
         <item>Runtime-InApp Mediation</item>
+        <item>Refresh Mediated Ad</item>
     </string-array>
 </resources>

PrivacySandboxKotlin/runtime-enabled-sdk-bundle/build.gradle

@@ -19,8 +19,7 @@ plugins {
 }
 
 android {
-    compileSdk 34
-    compileSdkExtension 12
+    compileSdk 35
     minSdk 21
 
     bundle {

PrivacySandboxKotlin/runtime-enabled-sdk/src/main/java/com/runtimeenabled/implementation/SdkSandboxedUiAdapterImpl.kt

@@ -27,6 +27,7 @@ import androidx.privacysandbox.sdkruntime.core.activity.ActivityHolder
 import androidx.privacysandbox.sdkruntime.core.activity.SdkSandboxActivityHandlerCompat
 import androidx.privacysandbox.sdkruntime.core.controller.SdkSandboxControllerCompat
 import androidx.privacysandbox.ui.client.view.SandboxedSdkView
+import androidx.privacysandbox.ui.core.DelegatingSandboxedUiAdapter
 import androidx.privacysandbox.ui.core.SandboxedUiAdapter
 import androidx.privacysandbox.ui.provider.AbstractSandboxedUiAdapter
 import com.runtimeenabled.R

PrivacySandboxKotlin/runtime-enabled-sdk/src/main/java/com/runtimeenabled/implementation/SdkServiceImpl.kt

@@ -17,10 +17,14 @@ package com.runtimeenabled.implementation
 
 import android.content.Context
 import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
 import android.os.RemoteException
 import android.util.Log
 import androidx.privacysandbox.sdkruntime.core.controller.SdkSandboxControllerCompat
 import androidx.privacysandbox.ui.client.SandboxedUiAdapterFactory
+import androidx.privacysandbox.ui.core.DelegatingSandboxedUiAdapter
+import androidx.privacysandbox.ui.core.ExperimentalFeatures
 import com.runtimeenabled.R
 import com.runtimeenabled.api.FullscreenAd
 import com.runtimeenabled.api.SdkBannerRequest
@@ -36,6 +40,9 @@ import androidx.privacysandbox.ui.core.SessionObserverContext
 import androidx.privacysandbox.ui.core.SessionObserverFactory
 import androidx.privacysandbox.ui.provider.toCoreLibInfo
 import com.runtimeenabled.api.MediateeAdapterInterface
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
 
 class SdkServiceImpl(private val context: Context) : SdkService {
 
@@ -76,10 +83,34 @@ class SdkServiceImpl(private val context: Context) : SdkService {
     // by the mediator to the app, without any wrapper, to avoid nested remote rendering. Since
     // this will need to be returned in a Bundle (one SDK cannot use a shim object defined by
     // another SDK), return type for getBanner will always be a Bundle.
+    @OptIn(ExperimentalFeatures.DelegatingAdapterApi::class)
     override suspend fun getBanner(
         request: SdkBannerRequest,
         mediationType: String
     ): Bundle? {
+        if (mediationType == context.getString(R.string.mediation_option_refresh_mediated_ads)) {
+            val runtimeMediateeBanner = SandboxedUiAdapterFactory.createFromCoreLibInfo(checkNotNull(
+                mediateeAdapter?.getBannerAd(
+                    request.appPackageName,
+                    request.activityLauncher,
+                    request.isWebViewBannerAd
+                )
+            ) { "No banner Ad received from mediatee!" })
+            // DelegatingSandboxedUiAdapter enables updating delegate from which different ads
+            // can be served without the client's involvement.
+            val delegatingAdapter = DelegatingSandboxedUiAdapter(
+                SdkSandboxedUiAdapterImpl(
+                    context,
+                    request,
+                    runtimeMediateeBanner
+                ).toCoreLibInfo(context)
+            )
+            // Launches a function to refresh the ad after a few seconds
+            CoroutineScope(Dispatchers.IO).launch {
+                updateDelegateAfterSomeDelay(request, delegatingAdapter);
+            }
+            return delegatingAdapter.toCoreLibInfo(context)
+        }
         if (mediationType == context.getString(R.string.mediation_option_none)) {
             val bannerAdAdapter = SdkSandboxedUiAdapterImpl(context, request, null)
             bannerAdAdapter.addObserverFactory(SessionObserverFactoryImpl())
@@ -108,6 +139,22 @@ class SdkServiceImpl(private val context: Context) : SdkService {
         ).toCoreLibInfo(context)
     }
 
+    private suspend fun updateDelegateAfterSomeDelay(
+        request: SdkBannerRequest,
+        delegatingAdapter: DelegatingSandboxedUiAdapter
+    ) {
+        delay(10000)
+        val inAppMediateeBanner = inAppMediateeAdapter?.getBannerAd(
+            request.appPackageName,
+            request.activityLauncher,
+            request.isWebViewBannerAd
+        )
+        // Refresh the ad to show ads from another mediatee
+        if (inAppMediateeBanner != null) {
+            delegatingAdapter.updateDelegate(inAppMediateeBanner)
+        }
+    }
+
     override suspend fun getFullscreenAd(mediationType: String): FullscreenAd {
         if (mediationType == context.getString(R.string.mediation_option_none)) {
             return FullscreenAdImpl(context, null, false)

PrivacySandboxKotlin/runtime-enabled-sdk/src/main/res/values/mediation_options.xml

@@ -18,5 +18,6 @@
 <resources>
     <string name="mediation_option_none">NONE</string>
     <string name="mediation_option_runtime_mediatee">RUNTIME_MEDIATEE</string>
+    <string name="mediation_option_refresh_mediated_ads">REFRESH_MEDIATED_ADS</string>
     <string name="mediation_option_inapp_mediatee">INAPP_MEDIATEE</string>
 </resources>