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此页面由 Cloud Translation API 翻译。

设置 IMA SDK

借助 IMA SDK，您可以轻松地将多媒体广告集成到网站和应用中。IMA SDK 可以从任何符合 VAST 标准的广告服务器请求广告，并在您的应用中管理广告播放。借助 IMA 客户端 SDK，您可以继续控制内容视频播放，而 SDK 则负责处理广告播放。广告在位于应用内容视频播放器顶部的单独视频播放器中播放。

本指南演示了如何使用 Android VideoView 将 IMA SDK 集成到空白 Android Studio 项目中，以显示内容和广告。如需跟随完成的集成示例进行操作，请从 GitHub 下载 BasicExample。

IMA 客户端概览

实现 IMA 客户端涉及四个主要 SDK 组件，本指南将对此进行演示：

AdDisplayContainer：一种容器对象，用于指定 IMA 呈现广告界面元素和衡量可见率（包括 Active View 和 Open Measurement）的位置。
AdsLoader：一个用于请求广告并处理广告请求响应中的事件的对象。您只需实例化一个广告加载程序，该加载程序可在整个应用生命周期内重复使用。
AdsRequest：用于定义广告请求的对象。广告请求会指定 VAST 广告代码的网址以及其他参数（例如广告尺寸）。
AdsManager：一个包含广告请求响应、控制广告播放并监听 SDK 触发的广告事件的对象。

前提条件

Android Studio。

1. 创建新的 Android Studio 项目

如需创建 Android Studio 项目，请完成以下步骤：

启动 Android Studio。
选择 Start a new Android Studio project。
在 Choose your project 页面中，选择 Empty Activity 模板。
点击下一步。
在配置项目页面中，为项目命名，然后选择 Java 作为语言。
注意：IMA SDK 与 Kotlin 兼容。不过，本指南中介绍的示例使用的是 Java。
点击完成。

2. 将 IMA SDK 添加到您的项目

首先，在应用级 build.gradle 文件中，向 dependencies 部分添加 IMA SDK 的导入。由于 IMA SDK 的大小，请在此处实现并启用多 dex 文件。对于将 minSdkVersion 设置为 20 或更低值的应用，此属性是必需的。此外，还添加了新的 compileOptions 来指定 Java 版本兼容性信息并启用库 desugaring。

IMA SDK 需要启用库 desugaring，您必须通过在 build.gradle 文件中设置 coreLibraryDesugaringEnabled true 并添加 coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.1.5' 作为依赖项来启用该功能。如需了解详情，请参阅通过脱糖提供的满足 Nio 规格要求的 Java 11 及更高版本 API。

app/build.gradle

android {
    namespace 'com.google.ads.interactivemedia.v3.samples.videoplayerapp'
    compileSdkVersion 34

    compileOptions {
        coreLibraryDesugaringEnabled true
        sourceCompatibility JavaVersion.VERSION_17
        targetCompatibility JavaVersion.VERSION_17
    }

    defaultConfig {
        applicationId "com.google.ads.interactivemedia.v3.samples.videoplayerapp"
        minSdkVersion 21
        targetSdkVersion 34
        multiDexEnabled true
        versionCode 1
        versionName "1.0"
    }

    ...
}

dependencies {
    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.1.5'
    implementation 'androidx.appcompat:appcompat:1.6.1'
    implementation 'androidx.browser:browser:1.6.0'
    implementation 'androidx.media:media:1.6.0'
    implementation 'com.google.ads.interactivemedia.v3:interactivemedia:3.36.0'

    ...
}

3. 添加 IMA SDK 所需的权限

添加 IMA SDK 请求广告所需的用户权限。

app/src/main/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.project name">

    <!-- Required permissions for the IMA SDK -->
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    ...

</manifest>

4. 更新应用布局

更新应用的布局，使其包含一个 VideoView，用于播放内容和广告。

app/src/main/res/layout/activity_my.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MyActivity"
    tools:ignore="MergeRootFrame">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="0.4"
        android:orientation="vertical"
        android:id="@+id/videoPlayerContainer" >

        <VideoView
            android:id="@+id/videoView"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

        <ImageButton
            android:id="@+id/playButton"
            android:contentDescription="@string/play_description"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:src="@drawable/ic_action_play_over_video"
            android:background="@null" />

    </RelativeLayout>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="0.6"
        android:id="@+id/videoDescription" >

        <TextView
            android:id="@+id/playerDescription"
            android:text="@string/app_name"
            android:textAlignment="center"
            android:gravity="center_horizontal"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:textSize="@dimen/font_size" />

    </FrameLayout>

</LinearLayout>

5. 将 IMA 导入到主 activity 中

添加 IMA SDK 的 import 语句。然后，更新 MyActivity 类以扩展 AppCompatActivity。AppCompatActivity 类可在旧版 Android 设备上支持新的平台功能。然后，添加一组将在应用中使用的私有变量。

app/src/main/java/com/example/project name/MyActivity.java


import android.content.Context;
import android.media.AudioManager;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.MediaController;
import android.widget.VideoView;
import com.google.ads.interactivemedia.v3.api.AdDisplayContainer;
import com.google.ads.interactivemedia.v3.api.AdErrorEvent;
import com.google.ads.interactivemedia.v3.api.AdEvent;
import com.google.ads.interactivemedia.v3.api.AdsLoader;
import com.google.ads.interactivemedia.v3.api.AdsManager;
import com.google.ads.interactivemedia.v3.api.AdsManagerLoadedEvent;
import com.google.ads.interactivemedia.v3.api.AdsRenderingSettings;
import com.google.ads.interactivemedia.v3.api.AdsRequest;
import com.google.ads.interactivemedia.v3.api.ImaSdkFactory;
import com.google.ads.interactivemedia.v3.api.ImaSdkSettings;
import com.google.ads.interactivemedia.v3.api.player.VideoProgressUpdate;
import java.util.Arrays;

...

public class MyActivity extends AppCompatActivity {

  private static final String LOGTAG = "IMABasicSample";
  private static final String SAMPLE_VIDEO_URL =
      "https://storage.googleapis.com/gvabox/media/samples/stock.mp4";

  /**
   * IMA sample tag for a single skippable inline video ad. See more IMA sample tags at
   * https://developers.google.com/interactive-media-ads/docs/sdks/html5/client-side/tags
   */
  private static final String SAMPLE_VAST_TAG_URL =
      "https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/"
          + "single_preroll_skippable&sz=640x480&ciu_szs=300x250%2C728x90&gdfp_req=1&output=vast"
          + "&unviewed_position_start=1&env=vp&correlator=";

  // Factory class for creating SDK objects.
  private ImaSdkFactory sdkFactory;

  // The AdsLoader instance exposes the requestAds method.
  private AdsLoader adsLoader;

  // AdsManager exposes methods to control ad playback and listen to ad events.
  private AdsManager adsManager;

  // The saved content position, used to resumed content following an ad break.
  private int savedPosition = 0;

  // This sample uses a VideoView for content and ad playback. For production
  // apps, Android's Exoplayer offers a more fully featured player compared to
  // the VideoView.
  private VideoView videoPlayer;
  private MediaController mediaController;
  private View playButton;
  private VideoAdPlayerAdapter videoAdPlayerAdapter;

}

6. 创建 VideoAdPlayerAdapter 类

创建一个包含 VideoView 的 VideoAdPlayerAdapter 类，并将其适配到 IMA 的 VideoAdPlayer 接口。此类将处理内容和广告播放，并包含 IMA SDK 使用的视频播放器必须实现的一组方法。

app/src/main/java/com/example/project name/VideoAdPlayerAdapter.java

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.util.Log;
import android.widget.VideoView;
import com.google.ads.interactivemedia.v3.api.AdPodInfo;
import com.google.ads.interactivemedia.v3.api.player.AdMediaInfo;
import com.google.ads.interactivemedia.v3.api.player.VideoAdPlayer;
import com.google.ads.interactivemedia.v3.api.player.VideoProgressUpdate;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

/** Example implementation of IMA's VideoAdPlayer interface. */
public class VideoAdPlayerAdapter implements VideoAdPlayer {

  private static final String LOGTAG = "IMABasicSample";
  private static final long POLLING_TIME_MS = 250;
  private static final long INITIAL_DELAY_MS = 250;
  private final VideoView videoPlayer;
  private final AudioManager audioManager;
  private final List<VideoAdPlayerCallback> videoAdPlayerCallbacks = new ArrayList<>();
  private Timer timer;
  private int adDuration;

  // The saved ad position, used to resumed ad playback following an ad click-through.
  private int savedAdPosition;
  private AdMediaInfo loadedAdMediaInfo;

  public VideoAdPlayerAdapter(VideoView videoPlayer, AudioManager audioManager) {
    this.videoPlayer = videoPlayer;
    this.videoPlayer.setOnCompletionListener(
        (MediaPlayer mediaPlayer) -> notifyImaOnContentCompleted());
    this.audioManager = audioManager;
  }
}

7. 替换 VideoAdPlayer 方法

替换以下 VideoAdPlayer 方法：

playAd() 方法用于设置内容或广告网址，并设置一个监听器，以便在媒体加载完毕后开始播放。

app/src/main/java/com/example/project name/VideoAdPlayerAdapter.java

/** Example implementation of IMA's VideoAdPlayer interface. */
public class VideoAdPlayerAdapter implements VideoAdPlayer {

  ...

  @Override
  public void addCallback(VideoAdPlayerCallback videoAdPlayerCallback) {
    videoAdPlayerCallbacks.add(videoAdPlayerCallback);
  }

  @Override
  public void loadAd(AdMediaInfo adMediaInfo, AdPodInfo adPodInfo) {
    // This simple ad loading logic works because preloading is disabled. To support
    // preloading ads your app must maintain state for the currently playing ad
    // while handling upcoming ad downloading and buffering at the same time.
    // See the IMA Android preloading guide for more info:
    // https://developers.google.com/interactive-media-ads/docs/sdks/android/client-side/preload
    loadedAdMediaInfo = adMediaInfo;
  }

  @Override
  public void pauseAd(AdMediaInfo adMediaInfo) {
    Log.i(LOGTAG, "pauseAd");
    savedAdPosition = videoPlayer.getCurrentPosition();
    stopAdTracking();
  }

  @Override
  public void playAd(AdMediaInfo adMediaInfo) {
    videoPlayer.setVideoURI(Uri.parse(adMediaInfo.getUrl()));

    videoPlayer.setOnPreparedListener(
        mediaPlayer -> {
          adDuration = mediaPlayer.getDuration();
          if (savedAdPosition > 0) {
            mediaPlayer.seekTo(savedAdPosition);
          }
          mediaPlayer.start();
          startAdTracking();
        });
    videoPlayer.setOnErrorListener(
        (mediaPlayer, errorType, extra) -> notifyImaSdkAboutAdError(errorType));
    videoPlayer.setOnCompletionListener(
        mediaPlayer -> {
          savedAdPosition = 0;
          notifyImaSdkAboutAdEnded();
        });
  }

  @Override
  public void release() {
    // any clean up that needs to be done.
  }

  @Override
  public void removeCallback(VideoAdPlayerCallback videoAdPlayerCallback) {
    videoAdPlayerCallbacks.remove(videoAdPlayerCallback);
  }

  @Override
  public void stopAd(AdMediaInfo adMediaInfo) {
    Log.i(LOGTAG, "stopAd");
    stopAdTracking();
  }

  /** Returns current volume as a percent of max volume. */
  @Override
  public int getVolume() {
    return audioManager.getStreamVolume(AudioManager.STREAM_MUSIC)
        / audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
  }

8. 设置广告跟踪

为了注册广告事件，必须在内容和广告播放过程中调用 VideoAdPlayerCallback.onAdProgress。为了支持这一点，请设置一个计时器，以按设定的时间间隔调用 onAdProgress()。

app/src/main/java/com/example/project name/VideoAdPlayerAdapter.java

/** Example implementation of IMA's VideoAdPlayer interface. */
public class VideoAdPlayerAdapter implements VideoAdPlayer {

  ...

  private void startAdTracking() {
    Log.i(LOGTAG, "startAdTracking");
    if (timer != null) {
      return;
    }
    timer = new Timer();
    TimerTask updateTimerTask =
        new TimerTask() {
          @Override
          public void run() {
            VideoProgressUpdate progressUpdate = getAdProgress();
            notifyImaSdkAboutAdProgress(progressUpdate);
          }
        };
    timer.schedule(updateTimerTask, POLLING_TIME_MS, INITIAL_DELAY_MS);
  }

  private void notifyImaSdkAboutAdEnded() {
    Log.i(LOGTAG, "notifyImaSdkAboutAdEnded");
    savedAdPosition = 0;
    for (VideoAdPlayer.VideoAdPlayerCallback callback : videoAdPlayerCallbacks) {
      callback.onEnded(loadedAdMediaInfo);
    }
  }

  private void notifyImaSdkAboutAdProgress(VideoProgressUpdate adProgress) {
    for (VideoAdPlayer.VideoAdPlayerCallback callback : videoAdPlayerCallbacks) {
      callback.onAdProgress(loadedAdMediaInfo, adProgress);
    }
  }

  /**
   * @param errorType Media player's error type as defined at
   *     https://cs.android.com/android/platform/superproject/+/master:frameworks/base/media/java/android/media/MediaPlayer.java;l=4335
   * @return True to stop the current ad playback.
   */
  private boolean notifyImaSdkAboutAdError(int errorType) {
    Log.i(LOGTAG, "notifyImaSdkAboutAdError");

    switch (errorType) {
      case MediaPlayer.MEDIA_ERROR_UNSUPPORTED:
        Log.e(LOGTAG, "notifyImaSdkAboutAdError: MEDIA_ERROR_UNSUPPORTED");
        break;
      case MediaPlayer.MEDIA_ERROR_TIMED_OUT:
        Log.e(LOGTAG, "notifyImaSdkAboutAdError: MEDIA_ERROR_TIMED_OUT");
        break;
      default:
        break;
    }
    for (VideoAdPlayer.VideoAdPlayerCallback callback : videoAdPlayerCallbacks) {
      callback.onError(loadedAdMediaInfo);
    }
    return true;
  }

  public void notifyImaOnContentCompleted() {
    Log.i(LOGTAG, "notifyImaOnContentCompleted");
    for (VideoAdPlayer.VideoAdPlayerCallback callback : videoAdPlayerCallbacks) {
      callback.onContentComplete();
    }
  }

  private void stopAdTracking() {
    Log.i(LOGTAG, "stopAdTracking");
    if (timer != null) {
      timer.cancel();
      timer = null;
    }
  }

  @Override
  public VideoProgressUpdate getAdProgress() {
    long adPosition = videoPlayer.getCurrentPosition();
    return new VideoProgressUpdate(adPosition, adDuration);
  }
}

9. 在 `onCreate` 方法中启动 IMA

覆盖 onCreate 方法并添加所需的变量赋值，以启动 IMA。在此步骤中，请创建以下内容：

ImaSdkSettings
AdsLoader

重要提示：为了缩短 IMA 加载时间，请在应用生命周期中尽早调用 ImaSdkFactory.initialize() 方法。尽早调用该方法可最大限度地延长 IMA 在发出首个广告请求之前加载必要资源的时间。ImaSdkFactory.initialize() 方法调用接受 ImaSdkSettings 实例。请务必在此处和创建 AdsLoader 实例时使用相同的设置值。此示例使用 getImaSdkSettings() 辅助方法来确保设置值相同。如需了解详情，请参阅优化 IMA 加载时间指南。

此步骤还会创建一个 VideoAdPlayerAdapter，这是您在本指南稍后创建的类。

最后，设置播放按钮以请求广告，然后在点击时隐藏。

app/src/main/java/com/example/project name/MyActivity.java

...

public class MyActivity extends AppCompatActivity {

  ...

  private VideoView videoPlayer;
  private MediaController mediaController;
  private View playButton;
  private VideoAdPlayerAdapter videoAdPlayerAdapter;
  private ImaSdkSettings imaSdkSettings;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_my);

    // Initialize the IMA SDK as early as possible when the app starts. If your app already
    // overrides Application.onCreate(), call this method inside the onCreate() method.
    // https://developer.android.com/topic/performance/vitals/launch-time#app-creation
    sdkFactory = ImaSdkFactory.getInstance();
    sdkFactory.initialize(this, getImaSdkSettings());

    // Create the UI for controlling the video view.
    mediaController = new MediaController(this);
    videoPlayer = findViewById(R.id.videoView);
    mediaController.setAnchorView(videoPlayer);
    videoPlayer.setMediaController(mediaController);

    // Create an ad display container that uses a ViewGroup to listen to taps.
    ViewGroup videoPlayerContainer = findViewById(R.id.videoPlayerContainer);
    AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
    videoAdPlayerAdapter = new VideoAdPlayerAdapter(videoPlayer, audioManager);

    AdDisplayContainer adDisplayContainer =
        ImaSdkFactory.createAdDisplayContainer(videoPlayerContainer, videoAdPlayerAdapter);

    // Create an AdsLoader.
    ImaSdkSettings settings = sdkFactory.createImaSdkSettings();
    adsLoader = sdkFactory.createAdsLoader(this, getImaSdkSettings(), adDisplayContainer);

    // When the play button is clicked, request ads and hide the button.
    playButton = findViewById(R.id.playButton);
    playButton.setOnClickListener(
        view -> {
          videoPlayer.setVideoPath(SAMPLE_VIDEO_URL);
          requestAds(SAMPLE_VAST_TAG_URL);
          view.setVisibility(View.GONE);
        });
  }

  private ImaSdkSettings getImaSdkSettings() {
    if (imaSdkSettings == null) {
      imaSdkSettings = ImaSdkFactory.getInstance().createImaSdkSettings();
      // Set any IMA SDK settings here.
    }
    return imaSdkSettings;
  }

}

10. 添加 AdsLoader 监听器

为 addAdErrorListener 和 addAdsLoadedListener 添加了监听器。在 AdsLoadedListener 中，创建 AdsManager，并设置 AdsManager 错误监听器。

app/src/main/java/com/example/project name/MyActivity.java

  @Override
  protected void onCreate(Bundle savedInstanceState) {

  ...

    // Create an AdsLoader.
    ImaSdkSettings settings = sdkFactory.createImaSdkSettings();
    adsLoader = sdkFactory.createAdsLoader(this, getImaSdkSettings(), adDisplayContainer);

    // Add listeners for when ads are loaded and for errors.
    adsLoader.addAdErrorListener(
        new AdErrorEvent.AdErrorListener() {
          /** An event raised when there is an error loading or playing ads. */
          @Override
          public void onAdError(AdErrorEvent adErrorEvent) {
            Log.i(LOGTAG, "Ad Error: " + adErrorEvent.getError().getMessage());
            resumeContent();
          }
        });
    adsLoader.addAdsLoadedListener(
        new AdsLoader.AdsLoadedListener() {
          @Override
          public void onAdsManagerLoaded(AdsManagerLoadedEvent adsManagerLoadedEvent) {
            // Ads were successfully loaded, so get the AdsManager instance. AdsManager has
            // events for ad playback and errors.
            adsManager = adsManagerLoadedEvent.getAdsManager();

            // Attach event and error event listeners.
            adsManager.addAdErrorListener(
                new AdErrorEvent.AdErrorListener() {
                  /** An event raised when there is an error loading or playing ads. */
                  @Override
                  public void onAdError(AdErrorEvent adErrorEvent) {
                    Log.e(LOGTAG, "Ad Error: " + adErrorEvent.getError().getMessage());
                    String universalAdIds =
                        Arrays.toString(adsManager.getCurrentAd().getUniversalAdIds());
                    Log.i(
                        LOGTAG,
                        "Discarding the current ad break with universal "
                            + "ad Ids: "
                            + universalAdIds);
                    adsManager.discardAdBreak();
                  }
                });
          }
        });

11. 处理 IMA 广告事件

使用 AdsManager.addAdEventListener 监听 IMA 广告事件。使用 switch 语句为以下 IMA 事件设置操作：

该代码段包含注释，其中提供了有关如何使用这些事件的更多信息。设置完事件后，您可以调用 AdsManager.init()。

app/src/main/java/com/example/project name/MyActivity.java

        adsLoader.addAdsLoadedListener(
        new AdsLoader.AdsLoadedListener() {
          @Override
          public void onAdsManagerLoaded(AdsManagerLoadedEvent adsManagerLoadedEvent) {

            ...

            adsManager.addAdEventListener(
                new AdEvent.AdEventListener() {
                  /** Responds to AdEvents. */
                  @Override
                  public void onAdEvent(AdEvent adEvent) {
                    if (adEvent.getType() != AdEvent.AdEventType.AD_PROGRESS) {
                      Log.i(LOGTAG, "Event: " + adEvent.getType());
                    }
                    // These are the suggested event types to handle. For full list of
                    // all ad event types, see AdEvent.AdEventType documentation.
                    switch (adEvent.getType()) {
                      case LOADED:
                        // AdEventType.LOADED is fired when ads are ready to play.

                        // This sample app uses the sample tag
                        // single_preroll_skippable_ad_tag_url that requires calling
                        // AdsManager.start() to start ad playback.
                        // If you use a different ad tag URL that returns a VMAP or
                        // an ad rules playlist, the adsManager.init() function will
                        // trigger ad playback automatically and the IMA SDK will
                        // ignore the adsManager.start().
                        // It is safe to always call adsManager.start() in the
                        // LOADED event.
                        adsManager.start();
                        break;
                      case CONTENT_PAUSE_REQUESTED:
                        // AdEventType.CONTENT_PAUSE_REQUESTED is fired when you
                        // should pause your content and start playing an ad.
                        pauseContentForAds();
                        break;
                      case CONTENT_RESUME_REQUESTED:
                        // AdEventType.CONTENT_RESUME_REQUESTED is fired when the ad
                        // you should play your content.
                        resumeContent();
                        break;
                      case ALL_ADS_COMPLETED:
                        // Calling adsManager.destroy() triggers the function
                        // VideoAdPlayer.release().
                        adsManager.destroy();
                        adsManager = null;
                        break;
                      case CLICKED:
                        // When the user clicks on the Learn More button, the IMA SDK fires
                        // this event, pauses the ad, and opens the ad's click-through URL.
                        // When the user returns to the app, the IMA SDK calls the
                        // VideoAdPlayer.playAd() function automatically.
                        break;
                      default:
                        break;
                    }
                  }
                });
            AdsRenderingSettings adsRenderingSettings =
                ImaSdkFactory.getInstance().createAdsRenderingSettings();
            adsManager.init(adsRenderingSettings);
          }

12. 处理广告与内容之间的切换

在本部分中，创建上一步中引用的 pauseContentForAds 和 resumeContent 方法。这些方法将重用播放器来播放内容和广告。您需要跟踪内容位置，以便在广告插播结束后恢复播放。

app/src/main/java/com/example/project name/MyActivity.java

/** Main activity. */
public class MyActivity extends AppCompatActivity {

  ...

  private void pauseContentForAds() {
    Log.i(LOGTAG, "pauseContentForAds");
    savedPosition = videoPlayer.getCurrentPosition();
    videoPlayer.stopPlayback();
    // Hide the buttons and seek bar controlling the video view.
    videoPlayer.setMediaController(null);
  }

  private void resumeContent() {
    Log.i(LOGTAG, "resumeContent");

    // Show the buttons and seek bar controlling the video view.
    videoPlayer.setVideoPath(SAMPLE_VIDEO_URL);
    videoPlayer.setMediaController(mediaController);
    videoPlayer.setOnPreparedListener(
        mediaPlayer -> {
          if (savedPosition > 0) {
            mediaPlayer.seekTo(savedPosition);
          }
          mediaPlayer.start();
        });
    videoPlayer.setOnCompletionListener(
        mediaPlayer -> videoAdPlayerAdapter.notifyImaOnContentCompleted());
  }
}

13. 提出广告请求

现在，添加 requestAds 方法以构建 AdsRequest 并使用它来调用 AdsLoader.requestAds()。

app/src/main/java/com/example/project name/MyActivity.java

/** Main activity. */
public class MyActivity extends AppCompatActivity {

  ...

  private void requestAds(String adTagUrl) {
    // Create the ads request.
    AdsRequest request = sdkFactory.createAdsRequest();
    request.setAdTagUrl(adTagUrl);
    request.setContentProgressProvider(
        () -> {
          if (videoPlayer.getDuration() <= 0) {
            return VideoProgressUpdate.VIDEO_TIME_NOT_READY;
          }
          return new VideoProgressUpdate(
              videoPlayer.getCurrentPosition(), videoPlayer.getDuration());
        });

    // Request the ad. After the ad is loaded, onAdsManagerLoaded() will be called.
    adsLoader.requestAds(request);
  }
}

大功告成！您现在可以使用 IMA SDK 请求和展示广告了。如需了解其他 SDK 功能，请参阅其他指南或 GitHub 上的示例。

设置 IMA SDK 使用集合让一切井井有条 根据您的偏好保存内容并对其进行分类。

IMA 客户端概览

前提条件

1. 创建新的 Android Studio 项目

2. 将 IMA SDK 添加到您的项目

3. 添加 IMA SDK 所需的权限

4. 更新应用布局

5. 将 IMA 导入到主 activity 中

6. 创建 VideoAdPlayerAdapter 类

7. 替换 VideoAdPlayer 方法

8. 设置广告跟踪

9. 在 onCreate 方法中启动 IMA

10. 添加 AdsLoader 监听器

11. 处理 IMA 广告事件

12. 处理广告与内容之间的切换

13. 提出广告请求

设置 IMA SDK

9. 在 `onCreate` 方法中启动 IMA