IMA SDK は、広告のリクエスト、視認性の測定、広告インプレッションのレポート作成に必要な依存関係を読み込みます。広告リクエストを行う前に IMA を初期化することで、広告再生前に IMA の依存関係を読み込む時間を最大限に確保できます。このページでは、アプリで IMA の読み込み時間を処理する方法について説明します。
[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["必要な情報がない","missingTheInformationINeed","thumb-down"],["複雑すぎる / 手順が多すぎる","tooComplicatedTooManySteps","thumb-down"],["最新ではない","outOfDate","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["サンプル / コードに問題がある","samplesCodeIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2025-09-05 UTC。"],[],[],null,["# Improve IMA load time\n\nThe IMA SDK loads dependencies to request ads, measure viewability and\nreport ad impressions. By initializing IMA before you make an ad request, you\nmaximize the time to load IMA dependencies before ad playback. This page covers\nhow to handling IMA load times in your app.\n\nCall `ImaSdkFactory.initialize()`\n---------------------------------\n\nThe\n[`ImaSdkFactory.initialize()`](/interactive-media-ads/docs/sdks/android/client-side/api/reference/com/google/ads/interactivemedia/v3/api/ImaSdkFactory#initialize(android.content.Context,com.google.ads.interactivemedia.v3.api.ImaSdkSettings))\nmethod starts to preload SDK resources in advance of the first ad request. To\nuse `initialize()`, you need IMA version 3.35.1 or higher.\n\nCall `ImaSdkFactory.initialize()` on application startup, or as early in the\napplication's lifecycle as your app structure allows. The `initialize()` call\ntakes the following parameters:\n\n- **`context`**: Uses the application context, which is always available during the lifecycle of the application.\n- **`settings`** : Pass the an [`ImaSdkSettings`](/interactive-media-ads/docs/sdks/android/client-side/api/reference/com/google/ads/interactivemedia/v3/api/ImaSdkSettings) object with its values set. The IMA settings used in the `initialize()` call must be the same as the settings values used in the `createAdsLoader()` call. The IMA SDK utilizes these settings, particularly the language setting, for cache key. We don't recommend using test or fake values for the settings used in the `initialize()` method call, as cache misses might occur and increase ad load time.\n\nReuse the `AdsLoader` instance\n------------------------------\n\nTo improve IMA load time, we recommend you reuse the same\n[`AdsLoader`](/interactive-media-ads/docs/sdks/android/client-side/api/reference/com/google/ads/interactivemedia/v3/api/AdsLoader)\ninstance. The `AdsLoader` interface can handle multiple ad or stream requests.\nAvoid creating a new `AdsLoader` instance for each request. Creating a new\n`AdsLoader` instance requires a load time, and uses additional device resources.\n\nRequest ads in advance of playback\n----------------------------------\n\nIf you have access to the `AdsLoader` instance prior to starting ad playback,\nyou can also call the\n[`AdsLoader.requestAds()`](/interactive-media-ads/docs/sdks/android/client-side/api/reference/com/google/ads/interactivemedia/v3/api/AdsLoader#requestAds(com.google.ads.interactivemedia.v3.api.AdsRequest))\nmethod early. Making this call starts loading pre-roll ads. When the user\nis ready to start content playback, call the\n[`AdsManager.init()`](/interactive-media-ads/docs/sdks/android/client-side/api/reference/com/google/ads/interactivemedia/v3/api/BaseManager#init())\nmethod and wait for the `LOADED` event to play ads."]]