RecyclerView android 中的 Admob 原生广告

Question

我在投放 admob 广告时，在回收站视图中遇到了这个问题

问题：实际上是替换了列表中的项目并放置了广告

应用堆栈溢出成员之一推荐的解决方案后，问题发生了

如何在android回收站视图中放置Admob本机高级广告？

这是我正在使用的代码：

@Override
public int getItemViewType(int position) {
    if (position>1 && (position+1) % 4 == 0) {

        return AD_TYPE;
    } else {

        return CONTENT_TYPE;
    }

}

@Override
public int getItemCount() {
    return articleList.size();
}

这是完整代码

public class ArticleAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{
private Context mContext;
private List<ArticleJson> articleList;
String titleoflist;
private static final int AD_TYPE = 2;
private static final int CONTENT_TYPE = 1;

public class MyViewHolder extends RecyclerView.ViewHolder {
    TextView txtTitle;
    LinearLayout linearLayout;
    private ArticleJson m_articleJson;

    public MyViewHolder(View view) {
        super(view);
        txtTitle = view.findViewById(R.id.texViewArticleTitle);
      
    }

    public void bindView(final ArticleJson articleJson){
        m_articleJson = articleJson;

    }
}

class adViewHolder extends RecyclerView.ViewHolder {
    TemplateView Adtemplate;
    UnifiedNativeAdView unifiedNativeAdView;

    public adViewHolder(@NonNull View itemView) {
        super(itemView);
        Adtemplate = itemView.findViewById(R.id.mednative_placeholder1);
        unifiedNativeAdView = itemView.findViewById(R.id.native_ad_view);
    }
}

public ArticleAdapter(Context mContext, List<ArticleJson> articleList,String titleoflist) {
    this.mContext = mContext;
    this.articleList = articleList;
    this.titleoflist = titleoflist;
}


@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    if (viewType == AD_TYPE) {
        adViewHolder madViewHolder = new adViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_ads, null, false));
        return madViewHolder;
    } else{
        MyViewHolder mYourViewHolder = new MyViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_article, null, false));
        return mYourViewHolder;
    }
}

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
    if (getItemViewType(position) == CONTENT_TYPE) {
        final ArticleJson articleJson = articleList.get(position);
        ((MyViewHolder)holder).bindView(articleJson);
        ((MyViewHolder)holder).linearLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
             
            }
        });

}else if (getItemViewType(position) == AD_TYPE){

        MobileAds.initialize(mContext, new OnInitializationCompleteListener() {
            @Override
            public void onInitializationComplete(InitializationStatus initializationStatus) {}
        });

        AdLoader adLoader2 = new AdLoader.Builder(mContext, "ca-app-pub-8376062614303044/3237856178")
                .forUnifiedNativeAd(new UnifiedNativeAd.OnUnifiedNativeAdLoadedListener() {
                    @Override
                    public void onUnifiedNativeAdLoaded(UnifiedNativeAd unifiedNativeAd) {
                        UnifiedNativeAdView unifiedNativeAdView = ((adViewHolder) holder).unifiedNativeAdView;
                        unifiedNativeAdView.setVisibility(View.VISIBLE);
                        NativeTemplateStyle styles = new
                                NativeTemplateStyle.Builder().build();

                        TemplateView template = ((adViewHolder) holder).Adtemplate;
                        template.setStyles(styles);
                        template.setNativeAd(unifiedNativeAd);


                    }
                })
                .build();

        adLoader2.loadAd(new AdRequest.Builder().build());



    }
}

@Override
public int getItemCount() {
    return articleList.size();
}

@Override
public int getItemViewType(int position) {
    if (position>1 && (position+1) % 4 == 0) {

        return AD_TYPE;
    } else {

        return CONTENT_TYPE;
    }

}

}

public class ArticleJson {
private String mid;
private String mTitle;
boolean isAd = false;

public ArticleJson() {

}
public ArticleJson(String mid, String mTitle) {
    this.mTitle = mTitle;
    this.mid = mid;
}

public String getMid() {
    return mid;
}

public String getmTitle() {
    return mTitle;
}}

Answer 1

出现此问题的原因是您仅使用适配器中的原始数据列表，而没有将广告对象添加到列表中。因此，根据上面的示例，您将只有 10 个项目（原始数据），而不是 13 个（带有广告对象）。

要在不影响原始数据的情况下获得您想要的结果，您可以执行如下操作：

1。将 ArticleAdapter 构造函数更改为如下所示。在这里，我创建了一个新的 ArticleJson 列表（articlesWithAdsList），其中包含广告和项目，并且我使用 adPos（广告频率编号）变量将每个广告放置在每第三行中，您可以根据需要更改它。为了区分广告和项目，我在 ArticleJson 对象中添加了一个布尔标志 isAd，最后你的articleList 指向新创建的articlesWithAdsList。

public ArticleAdapter(Context mContext, List<ArticleJson> articleList, String titleoflist) {
        this.mContext = mContext;
        //prepare a new List<ArticleJson> having both ads and data
        List<ArticleJson> articlesWithAdsList = new ArrayList<>();
        if(articleList!=null && articleList.size()>0)
        {
            int adPos = 0;
            //iterate through the actual data list and prepare the new articlesWithAdsList
            for (int i = 0; i < articleList.size(); i++)
            {
                //initialize and add the ad in every 3rd row
                if(adPos == 3) {
                    ArticleJson advertise = new ArticleJson();
                    advertise.isAd = true;
                    articlesWithAdsList.add(advertise);
                    adPos = 0;
                }
                //and add the actual Item ArticleJson object
                ArticleJson articleJson = articleList.get(i);
                articleJson.isAd = false;
                articlesWithAdsList.add(articleJson);
                adPos++;
            }
        }
        //articleList now have both ads and data items
        this.articleList = articlesWithAdsList;
        this.titleoflist = titleoflist;
    }

2.更改 getItemViewType(intposition) 以使用 isAd 标志来区分 AD_TYPE 和 Item CONTENT_TYPE，如下所示：

@Override
public int getItemViewType(int position) {
    ArticleJson articleJson = articleList.get(position);
    if (articleJson.isAd) {
        return AD_TYPE;
    } else {
        return CONTENT_TYPE;
    }
}

3。最后将 isAd 标志添加到您的 ArticleJson 对象中：

public class ArticleJson {
    boolean isAd = false;
    public ArticleJson() {
   
    }
}

Answer 2

您可以在每隔两个位置插入空项目 if(position %2 ==0)，然后将修改后的列表传递给适配器，并在适配器中在空项目上显示广告。