安卓接入谷歌原生广告（Google AdMob）

一、导入谷歌广告SDK流程（官方文档）

1.项目级build.gradle中加入google()，如下：

allprojects {
    repositories {
        google()
    }
}

2.应用级build.gradle，在dependencies中引入implementation 'com.google.android.gms:play-services-ads:19.6.0'，如下：

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'com.google.android.gms:play-services-ads:19.6.0'
}

3.修改AndroidManifest.xml文件
将在AdMob中注册的应用ID（可在 AdMob 界面中找到）以<meta-data>方式添加到AndroidManifest.xml中，如下：

<manifest>
    <application>
        <!-- Sample AdMob app ID: ca-app-pub-3940256099942544~3347511713 -->
        <meta-data
            android:name="com.google.android.gms.ads.APPLICATION_ID"
            android:value="ca-app-pub-xxxxxxxxxxxxxxxx~yyyyyyyyyy"/>
    </application>
</manifest>

!!!注：在实际应用中，需要将上述value对应的值替换为实际AdMob应用ID，若只是demo中，可以使用上述sample的应用ID。

4.初始化SDK
在application中调用如下方法初始化SDK

MobileAds.initialize(context, new OnInitializationCompleteListener() {
      @Override
      public void onInitializationComplete(InitializationStatus initializationStatus) {
        Log.e(TAG, "AdMob init rst:" + JSON.toJson(initializationStatus.getAdapterStatusMap()));
      }
});

二、谷歌广告实现

先上效果图，如下：

效果图

1.在xml布局中广告显示位置添加占位view，如下

<FrameLayout
    android:id="@+id/fl_adplaceholder"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="@dimen/dp_15" />

2.自定义广告显示样式，使用UnifiedNativeAdView类对应一个原生广告，用于展示该广告素材资源的视图（例如，展示屏幕截图素材资源的 ImageView），均应是UnifiedNativeAdView对象的子对象。ad_unified_img_body.xml布局如下：

<com.google.android.gms.ads.formats.UnifiedNativeAdView
      android:id="@+id/native_ad_view"
      android:layout_width="match_parent"
      android:layout_height="wrap_content">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:minHeight="@dimen/dp_73">

      <RelativeLayout
          android:layout_width="@dimen/dp_130"
          android:layout_height="@dimen/dp_73">
        <com.google.android.gms.ads.formats.MediaView
            android:id="@+id/ad_media"
            android:layout_width="@dimen/dp_130"
            android:layout_height="@dimen/dp_73"
            android:layout_gravity="center_horizontal" />

        <TextView
            android:id="@+id/ad_choices"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="@dimen/dp_12"
            android:textColor="#707070"
            android:background="@drawable/ad_mob_icon_bg"
            android:layout_marginTop="@dimen/dp_5"
            android:layout_marginEnd="@dimen/dp_5"
            android:layout_alignParentEnd="true"
            android:paddingStart="@dimen/dp_4"
            android:paddingEnd="@dimen/dp_4"
            android:text="@string/ad_google"/>
      </RelativeLayout>

      <LinearLayout
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:layout_marginStart="@dimen/dp_16"
          android:gravity="center_vertical"
          android:orientation="vertical">
        <TextView
            android:id="@+id/ad_headline"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textColor="#262D44"
            android:layout_marginTop="@dimen/dp_3"
            android:ellipsize="end"
            android:singleLine="true"
            android:text=""
            android:textSize="@dimen/dp_15"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/ad_body"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:maxLines="2"
            android:textColor="#818799"
            android:ellipsize="end"
            android:textSize="@dimen/dp_13" />
      </LinearLayout>
    </LinearLayout>
  </com.google.android.gms.ads.formats.UnifiedNativeAdView>

3.开始加载广告内容

/**
   * 加载广告
   * @param context cont
   * @param id 广告id
   * @param listener 监听
   */
public static void loadAd(Context context, String id, OnAdLoadListener listener) {
    if (!checkThread()) {
      return;
    }
    Log.e(TAG, "AdMob load ad " + id);
    AdLoader.Builder builder = new AdLoader.Builder(context, id);
    builder.forUnifiedNativeAd(new UnifiedNativeAd.OnUnifiedNativeAdLoadedListener() {
      @Override
      public void onUnifiedNativeAdLoaded(UnifiedNativeAd unifiedNativeAd) {
        //广告数据加载成功
        if (listener != null) {
          listener.onAdLoaded(unifiedNativeAd);
        }
      }
    });
    builder.withAdListener(new AdListener() {
      @Override
      public void onAdFailedToLoad(LoadAdError loadAdError) {
        String error =
            String.format("domain: %s, code: %d, message: %s, cause: %s", loadAdError.getDomain(),
                loadAdError.getCode(), loadAdError.getMessage(), loadAdError.getCause());
        Log.e(AdMob.TAG, error);
        if (listener != null) {
          listener.onAdFailedToLoad(loadAdError);
        }
      }
    });
    //设置广告的属性
    VideoOptions videoOptions = new VideoOptions.Builder().setStartMuted(true).build();
    NativeAdOptions adOptions = new NativeAdOptions.Builder().setVideoOptions(videoOptions)
        //.setAdChoicesPlacement(ADCHOICES_BOTTOM_RIGHT)//设置广告中自带的广告标识view的位置，不设置默认显示在右上角
        .build();
    builder.withNativeAdOptions(adOptions);

    AdLoader adLoader = builder.build();
    adLoader.loadAd(new AdRequest.Builder().build());
  }

4.广告数据加载成功后，使用UnifiedNativeAd对象填充自定义的广告视图view

AdMob.loadAd(getActivity(), "ca-app-pub-3940256099942544/2247696110",
            new AdMob.OnAdLoadListener() {
              @Override
              public void onAdLoaded(UnifiedNativeAd unifiedNativeAd) {
                if (getActivity() == null
                    || getActivity().isFinishing()
                    || getActivity().isDestroyed()) {
                  unifiedNativeAd.destroy();
                  return;
                }

                FrameLayout frameLayout = (FrameLayout) getActivity().getLayoutInflater()
                    .inflate(R.layout.ad_unified_img_body, null);
                View view = frameLayout.findViewById(R.id.view_bg);
                UnifiedNativeAdView adView =
                    (UnifiedNativeAdView) frameLayout.findViewById(R.id.native_ad_view);
                AdMob.populateUnifiedNativeAdViewForImgAndBody(unifiedNativeAd, adView);

                float aspectRatio = unifiedNativeAd.getMediaContent().getAspectRatio();
                FrameLayout.LayoutParams layoutParams =
                    (FrameLayout.LayoutParams) adView.getLayoutParams();
                if (layoutParams == null) {
                  layoutParams = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                      ViewGroup.LayoutParams.WRAP_CONTENT);
                }
                layoutParams.height = ad.getResources().getDimensionPixelSize(R.dimen.dp_73);
                view.setVisibility(View.VISIBLE);
                ad.removeAllViews();
                ad.addView(frameLayout, layoutParams);
              }

              @Override
              public void onAdFailedToLoad(LoadAdError loadAdError) {

              }
            });

上述填充数据populateUnifiedNativeAdViewForImgAndBody()方法如下：

public static void populateUnifiedNativeAdViewForImgAndBody(UnifiedNativeAd nativeAd,
      UnifiedNativeAdView adView) {
    // Set the media view.
    adView.setHeadlineView(adView.findViewById(R.id.ad_headline));
    adView.setMediaView(adView.findViewById(R.id.ad_media));
    adView.setBodyView(adView.findViewById(R.id.ad_body));

    // The mediaContent are guaranteed to be in every UnifiedNativeAd.
    adView.getMediaView().setMediaContent(nativeAd.getMediaContent());
    adView.getMediaView().setImageScaleType(ImageView.ScaleType.CENTER_INSIDE);
    ((TextView) adView.getHeadlineView()).setText(nativeAd.getHeadline());

    // These assets aren't guaranteed to be in every UnifiedNativeAd, so it's important to
    // check before trying to display them.
    if (nativeAd.getBody() == null) {
      adView.getBodyView().setVisibility(View.INVISIBLE);
    } else {
      adView.getBodyView().setVisibility(View.VISIBLE);
      ((TextView) adView.getBodyView()).setText(nativeAd.getBody());
    }

    // This method tells the Google Mobile Ads SDK that you have finished populating your
    // native ad view with this native ad.
    adView.setNativeAd(nativeAd);

    // Get the video controller for the ad. One will always be provided, even if the ad doesn't
    // have a video asset.
    VideoController vc = nativeAd.getVideoController();

    // Updates the UI to say whether or not this ad has a video asset.
    if (vc.hasVideoContent()) {
      Log.e(TAG,
          String.format(Locale.getDefault(), "Video status: Ad contains a %.2f:1 video asset.",
              vc.getAspectRatio()));

      // Create a new VideoLifecycleCallbacks object and pass it to the VideoController. The
      // VideoController will call methods on this object when events occur in the video
      // lifecycle.
      vc.setVideoLifecycleCallbacks(new VideoController.VideoLifecycleCallbacks() {
        @Override
        public void onVideoEnd() {
          // Publishers should allow native ads to complete video playback before
          // refreshing or replacing them with another ad in the same UI location.
          Log.e(TAG, "Video status: Video playback has ended.");
          super.onVideoEnd();
        }
      });
    } else {
      Log.e(TAG, "Video status: Ad does not contain a video asset.");
    }
  }