Updated AppOpen kotlin sample to use ad preloading.

PiperOrigin-RevId: 797940528

Author: Nicholas Ventimiglia

kotlin/NextGenExample/app/src/main/java/com/example/nextgenexample/MyApplication.kt

@@ -16,71 +16,13 @@
 
 package com.example.nextgenexample
 
-import android.app.Activity
 import android.app.Application
-import android.os.Bundle
-import androidx.fragment.app.FragmentActivity
-import androidx.lifecycle.DefaultLifecycleObserver
-import androidx.lifecycle.LifecycleOwner
-import androidx.lifecycle.ProcessLifecycleOwner
-import androidx.navigation.fragment.NavHostFragment
-import androidx.preference.PreferenceManager
 import com.example.nextgenexample.appopen.AppOpenAdManager
-import com.example.nextgenexample.appopen.AppOpenFragment
 
-/** Application class that initializes, loads and show ads when activities change states. */
-class MyApplication :
-  Application(), Application.ActivityLifecycleCallbacks, DefaultLifecycleObserver {
-
-  private var currentActivity: Activity? = null
+class MyApplication : Application() {
 
   override fun onCreate() {
     super<Application>.onCreate()
-    registerActivityLifecycleCallbacks(this)
-
-    ProcessLifecycleOwner.get().lifecycle.addObserver(this)
-  }
-
-  /**
-   * DefaultLifecycleObserver method that shows the app open ad when the app moves to foreground.
-   */
-  override fun onStart(owner: LifecycleOwner) {
-    currentActivity?.let { activity ->
-      // Show app open ad if the switch to enable app open ads on all starts is on, or if returning
-      // to the AppOpenFragment.
-
-      val isAppOpenFragment =
-        ((activity as? FragmentActivity)
-            ?.supportFragmentManager
-            ?.findFragmentById(R.id.nav_host_fragment_content_main) as? NavHostFragment)
-          ?.childFragmentManager
-          ?.primaryNavigationFragment is AppOpenFragment
-
-      if (
-        PreferenceManager.getDefaultSharedPreferences(activity)
-          .getBoolean(AppOpenFragment.KEY_SHOW_APP_OPEN_AD_ON_ALL_STARTS, false) ||
-          isAppOpenFragment
-      ) {
-        AppOpenAdManager.showAdIfAvailable(activity, null)
-        return
-      }
-    }
-  }
-
-  /** ActivityLifecycleCallback methods. */
-  override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {}
-
-  override fun onActivityStarted(activity: Activity) {
-    currentActivity = activity
+    AppOpenAdManager.initialize(this)
   }
-
-  override fun onActivityResumed(activity: Activity) {}
-
-  override fun onActivityPaused(activity: Activity) {}
-
-  override fun onActivityStopped(activity: Activity) {}
-
-  override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle) {}
-
-  override fun onActivityDestroyed(activity: Activity) {}
 }

kotlin/NextGenExample/app/src/main/java/com/example/nextgenexample/SplashActivity.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024 Google LLC
+ * Copyright 2026 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,9 +22,7 @@ import android.os.CountDownTimer
 import android.util.Log
 import android.widget.TextView
 import androidx.appcompat.app.AppCompatActivity
-import androidx.preference.PreferenceManager
 import com.example.nextgenexample.appopen.AppOpenAdManager
-import com.example.nextgenexample.appopen.AppOpenFragment
 import com.example.nextgenexample.databinding.ActivitySplashBinding
 import com.google.android.libraries.ads.mobile.sdk.MobileAds
 import com.google.android.libraries.ads.mobile.sdk.common.RequestConfiguration
@@ -79,12 +77,9 @@ class SplashActivity : AppCompatActivity() {
 
   /** Create the countdown timer, which counts down to zero and shows the app open ad. */
   private fun createTimer() {
-    val sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this@SplashActivity)
-    // Do not show the app open ad by default.
-    val shouldShowAppOpenAd =
-      sharedPrefs.getBoolean(AppOpenFragment.KEY_SHOW_APP_OPEN_AD_ON_ALL_STARTS, false)
-    // For better usability of this sample, shorten the splash screen timer if an app open ad will
-    // be shown.
+
+    val shouldShowAppOpenAd = AppOpenAdManager.isAppOpenAdOnColdStartEnabled(this)
+
     val timerDurationInSeconds = if (shouldShowAppOpenAd) 5L else 2L
 
     counterTextView = binding.timer
@@ -149,8 +144,8 @@ class SplashActivity : AppCompatActivity() {
       )
 
       if (googleMobileAdsConsentManager.canRequestAds) {
-        // Load an app open ad when Mobile Ads SDK initialization is complete.
-        AppOpenAdManager.loadAd(this@SplashActivity)
+        // Start preloading an app open ad when Mobile Ads SDK initialization is complete.
+        AppOpenAdManager.startPreloading()
       }
     }
   }