问题描述
在放置 admob 广告时，我的 Recycler 视图遇到了这个问题
问题：实际上是替换了列表中的item并放置了广告
应用堆栈溢出成员之一推荐的此解决方案后，出现问题
How to place Admob Native Advanced Ads in recycler view android?
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();
}
这是完整的代码
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,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;
}}
解决方法
出现问题是因为您只使用了适配器中的原始数据列表，而没有将广告对象放入列表中。因此，根据您上面的示例，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，您可以执行以下操作：
1.将您的 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，我使用 adPos（广告频率数）变量将每个广告放置在每第三行中，您可以根据满足您的需求。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，最后您的 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(int position) 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() {
}
}