此页面由 Cloud Translation API 翻译。

开始使用

IMA SDK 可让您轻松地将多媒体广告集成到您的网站和应用中。IMA SDK 可以向任意 <ph type="x-smartling-placeholder"></ph> 符合 VAST 标准的广告服务器，并管理应用中的广告播放。借助 IMA 客户端 SDK 您控制内容视频播放，而 SDK 处理广告播放。广告播放独立的视频播放器，位于应用的内容视频播放器之上。

本指南将演示如何使用 Android VideoView 显示内容和广告。跟随已完成的样书学习集成，请下载 GitHub 中的 BasicExample。

<ph type="x-smartling-placeholder">。

IMA 客户端概览

实施 IMA 客户端涉及四个主要的 SDK 组件，本示例演示了这些组件指南：

AdDisplayContainer: 用于呈现广告的容器对象。
AdsLoader: 用于请求广告并处理广告请求响应中事件的对象。您只能实例化一个广告加载器，该加载器可在应用的整个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: 一个对象，包含对广告请求的响应、控制广告播放以及监听广告所有事件。

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 Configure your project 页面中，为项目命名并选择 Java 作为语言。
注意：IMA SDK 与 Kotlin 兼容。不过，上述示例都使用 Java。
点击完成。

2. 将 IMA SDK 添加到您的项目中

首先，在应用级 build.gradle 文件中，将 IMA SDK 的导入项添加到依赖项部分。由于 IMA SDK 较大，请在此处实施并启用 MultiDex。这个对于 minSdkVersion 设为 20 或更低的应用而言，是必需的。此外，请添加新的 compileOptions：用于指定 Java 版本兼容性信息。

app/build.gradle

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

    compileOptions {
        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 {
    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:3.35.1'

    ...
}

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

更新应用的布局以添加 VideoView，以便同时播放内容和广告。

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 导入主活动

为 IMA SDK 添加 import 语句。然后，更新 MyActivity 类扩展 AppCompatActivity。通过 AppCompatActivity 类允许在旧版系统上支持较新的平台功能 Android 设备。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&impl=s&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

使用 VideoView 创建一个 VideoAdPlayerAdapter 类，并根据 IMA 的 <ph type="x-smartling-placeholder"></ph> VideoAdPlayer 界面。此类将处理内容和广告播放，并包含方法。

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，并设置要开始播放的监听器在媒体加载后播放。

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 VideoAdPlayerCallback.onAdProgress 必须作为内容和广告进度进行调用。为了支持此功能，请设置一个计时器，以便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，创建以下内容：

ImaSdkSettings
AdsLoader

。 <ph type="x-smartling-placeholder">

</ph> 重要提示：为了减少 IMA 导致的延迟时间，请务必创建 AdsLoader。这样可以最大限度地延长 IMA 的加载时间投放第一个广告请求之前需要的资源您还应该重复使用 AdsLoader 实例，以免因重新创建该实例而导致额外的延迟。

此步骤还会创建一个 VideoAdPlayerAdapter，即您稍后创建的类。

最后，将播放按钮设置为请求广告，然后在点击该按钮后隐藏。

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;

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

    // 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);

    sdkFactory = ImaSdkFactory.getInstance();

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

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

}

10. 添加 AdsLoader 监听器

为 addAdErrorListener 和 addAdsLoadedListener。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, settings, 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

使用以下代码监听 IMA 广告事件： AdsManager.addAdEventListener。使用 switch 语句，为以下 IMA 事件设置操作：

代码段包含注释，其中提供了有关如何使用事件的详细信息。部署事件后，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. 处理广告和内容之间的切换

在本部分中，创建 pauseContentForAds 和 resumeContent。方法。这些方法会重复使用播放器内容和广告您需要跟踪内容位置在广告插播时间点之后继续播放。

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！现在，您将通过 IMA SDK 请求并展示广告。如需详细了解其他 SDK 功能，请参阅其他指南或 GitHub 上的示例。

开始使用

IMA 客户端概览

前提条件

1. 创建新的 Android Studio 项目

2. 将 IMA SDK 添加到您的项目中

3. 添加 IMA SDK 所需的权限

4. 更新应用布局

5. 将 IMA 导入主活动

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. 处理广告和内容之间的切换

13. 提出广告请求

9. 在 `onCreate` 方法中启动 IMA