固定尺寸的横幅广告
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Google 移动广告 SDK 支持固定尺寸广告，适用于自适应横幅广告无法满足需求的场景。
下表列出了标准横幅广告尺寸。
展示广告的容器尺寸必须至少与横幅一样大。设置任何内边距都会实际减小容器的可用尺寸。如果容器无法容纳横幅广告，该广告不会展示，同时系统会记录以下警告：
W/Ads: Not enough space to show ad. Needs 320x50 dp, but only has 288x495 dp.
将 AdView 添加到布局中
除了以编程方式创建 AdView 之外，还可以将 AdView 添加到您希望用来展示广告的 Activity 或 Fragment 的 XML 布局中。下面举个例子加以说明：
<com.google.android.gms.ads.AdView
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:id="@+id/banner_ad_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
ads:adSize="BANNER"
ads:adUnitId="ca-app-pub-3940256099942544/6300978111" />
请注意设置以下必需属性：
固定尺寸的横幅广告示例
Java
Kotlin
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最后更新时间 (UTC)：2025-08-25。
[null,null,["最后更新时间 (UTC)：2025-08-25。"],[[["\u003cp\u003eThe Google Mobile Ads SDK offers fixed ad sizes as an alternative to adaptive banners, providing specific dimensions for different ad formats.\u003c/p\u003e\n"],["\u003cp\u003eDevelopers need to ensure the container size is sufficient to display the chosen ad size to avoid warnings or ad display issues.\u003c/p\u003e\n"],["\u003cp\u003eAdViews can be integrated directly into XML layouts by specifying the desired ad size and the ad unit ID.\u003c/p\u003e\n"],["\u003cp\u003eStandard banner sizes like Banner (320x50), Large Banner (320x100), and IAB Medium Rectangle (300x250) are available for both phones and tablets, while IAB Full-size Banner (468x60) and IAB Leaderboard (728x90) are primarily for tablets.\u003c/p\u003e\n"]]],[],null,["# Fixed size banner ads\n\nSelect platform: [Android](/admob/android/banner/fixed-size \"View this page for the Android platform docs.\") [iOS](/admob/ios/banner/fixed-size \"View this page for the iOS platform docs.\") [Flutter](/admob/flutter/banner/fixed-size \"View this page for the Flutter platform docs.\")\n\n\u003cbr /\u003e\n\nThe\n\nGoogle Mobile Ads SDK\n\nsupports fixed ad sizes for situations where adaptive\nbanners ads don't meet your needs.\n\nThe following table lists the standard banner sizes.\n\n| Size in dp (WxH) | Description | Availability | AdSize constant |\n|------------------|----------------------|--------------------|-------------------------------------------------------------------------------------------------|\n| 320x50 | Banner | Phones and tablets | [BANNER](/admob/android/reference/com/google/android/gms/ads/AdSize#BANNER) |\n| 320x100 | Large banner | Phones and tablets | [LARGE_BANNER](/admob/android/reference/com/google/android/gms/ads/AdSize#LARGE_BANNER) |\n| 300x250 | IAB medium rectangle | Phones and tablets | [MEDIUM_RECTANGLE](/admob/android/reference/com/google/android/gms/ads/AdSize#MEDIUM_RECTANGLE) |\n| 468x60 | IAB full-size banner | Tablets | [FULL_BANNER](/admob/android/reference/com/google/android/gms/ads/AdSize#FULL_BANNER) |\n| 728x90 | IAB leaderboard | Tablets | [LEADERBOARD](/admob/android/reference/com/google/android/gms/ads/AdSize#LEADERBOARD) |\n\nThe size of the container in which you place your ad must be at least as big as\nthe banner. Any padding effectively decreases the size of your container. If the\ncontainer cannot fit the banner ad, the ad isn't shown and the following\nwarning is logged: \n\n W/Ads: Not enough space to show ad. Needs 320x50 dp, but only has 288x495 dp.\n\nAdd AdView to the layout\n------------------------\n\nAlternative to creating the `AdView`\nprogrammatically, add the `AdView` to the XML layout\nfor the `Activity` or `Fragment` in which you'd like to display\nit. Here's an example: \n\n \u003ccom.google.android.gms.ads.AdView\n xmlns:ads=\"http://schemas.android.com/apk/res-auto\"\n android:id=\"@+id/banner_ad_view\"\n android:layout_width=\"wrap_content\"\n android:layout_height=\"wrap_content\"\n android:layout_centerHorizontal=\"true\"\n android:layout_alignParentBottom=\"true\"\n ads:adSize=\"BANNER\"\n ads:adUnitId=\"ca-app-pub-3940256099942544/6300978111\" /\u003e\n\nNote the following required attributes:\n\n- `ads:adSize`: Set this to the ad size you'd like to use. If you don't want to\n use the standard size defined by the constant, you can set a custom size\n instead. Example: `ads:adSize=\"320x50\"`.\n\n- `ads:adUnitId`: Set this to the ad unit in your app where ads are to be\n displayed. If you show banner ads in different activities, each would require\n an ad unit.\n\n\u003cbr /\u003e\n\nFixed size banner ads example\n-----------------------------\n\n[Java](//github.com/googleads/googleads-mobile-android-examples/blob/main/java/advanced/APIDemo/app/src/main/java/com/google/android/gms/example/apidemo/AdMobBannerSizesFragment.java)\n[Kotlin](//github.com/googleads/googleads-mobile-android-examples/blob/main/kotlin/advanced/APIDemo/app/src/main/java/com/google/android/gms/example/apidemo/AdMobBannerSizesFragment.kt)"]]