android - 在recyclereview中添加admob原生广告

Question

我正在尝试在 recyclerview fragment 中转换 admob 原生广告，该 fragment 显示在 viewpager 内。

我的 fragment 看起来像:

public class SunFragment extends Fragment {
  public static final int NUMBER_OF_ADS = 1;
  private AdLoader adLoader;
  private List<Object> mRecyclerViewItems = new ArrayList<>();
  private List<UnifiedNativeAd> mNativeAds = new ArrayList<>();

  ArrayList<Object> sunsList;
  Typeface sunfont;
  Double Dlat;
  Double Dlang;

  //to be called by the MainActivity
  public SunFragment() {
    // Required empty public constructor
  }


  private static final String KEY_LOCATION_NAME = "location_name";
  public String TAG = "SunFragment";
  public String location;//="No location name found";

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (savedInstanceState != null) {
      location = savedInstanceState.getCharSequence(KEY_LOCATION_NAME).toString();
      }
    setRetainInstance(true);
    loadNativeAds();
    //MainActivity activity = (MainActivity) getActivity();
    mRecyclerViewItems = this.getRecyclerViewItems();
  }
//  public List<Object> getRecyclerViewItems() {
//    return mRecyclerViewItems;
//  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
                           Bundle savedInstanceState) {
    sunsList = new ArrayList<>();
    sunsList.add(
        new SunSession(...//Populate sunsList one by one//...)
   View rootView = inflater.inflate(R.layout.fragment_sun, container, false);
    RecyclerView rv = rootView.findViewById(R.id.rv_recycler_view);
    rv.setNestedScrollingEnabled(false);
    rv.setHasFixedSize(true);
    RecyclerView.LayoutManager llm = new LinearLayoutManager(getActivity());
    rv.setLayoutManager(llm);
//    System.out.println("location  " + location);
    setRetainInstance(true);
    RecyclerView.Adapter adapter = new SunAdapter(getContext(), sunsList);
    rv.setAdapter(adapter);
    return rootView;
  }


  @Override
  public void onSaveInstanceState(Bundle locState) {
    super.onSaveInstanceState(locState);
    if (location != null) {
      locState.putCharSequence(KEY_LOCATION_NAME, location);
    }
  }

  public List<Object> getRecyclerViewItems() {
    return mRecyclerViewItems;
  }

  private void insertAdsInMenuItems() {
    if (mNativeAds.size() <= 0) {
      return;
    }

    int offset = (mRecyclerViewItems.size() / mNativeAds.size()) + 1;
    int index = 0;
    for (UnifiedNativeAd ad : mNativeAds) {
      mRecyclerViewItems.add(index, ad);
      index = index + offset;
    }
    //loadMenu();
  }

  private void loadNativeAds() {

    Toast.makeText(getContext(), "Here I am", Toast.LENGTH_LONG).show();
    AdLoader.Builder builder = new AdLoader.Builder(getContext(), getString(R.string.ad_unit_id));
    adLoader = builder.forUnifiedNativeAd(
        new UnifiedNativeAd.OnUnifiedNativeAdLoadedListener() {
          @Override
          public void onUnifiedNativeAdLoaded(UnifiedNativeAd unifiedNativeAd) {
            // A native ad loaded successfully, check if the ad loader has finished loading
            // and if so, insert the ads into the list.
            mNativeAds.add(unifiedNativeAd);
            if (!adLoader.isLoading()) {
              insertAdsInMenuItems();
            }
          }
        }).withAdListener(
        new AdListener() {
          @Override
          public void onAdFailedToLoad(int errorCode) {
            // A native ad failed to load, check if the ad loader has finished loading
            // and if so, insert the ads into the list.
            Log.e("MainActivity", "The previous native ad failed to load. Attempting to"
                + " load another.");
            if (!adLoader.isLoading()) {
              insertAdsInMenuItems();
            }
          }
        }).build();

    // Load the Native ads.
    adLoader.loadAds(new AdRequest.Builder().build(), NUMBER_OF_ADS);
  }
}

我的适配器是:

public class SunAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

  private final Context mContext;
  private final ArrayList<Object> mSunsList;
  private static final int MENU_ITEM_VIEW_TYPE = 0;
  private static final int UNIFIED_NATIVE_AD_VIEW_TYPE = 1;


  public SunAdapter(Context context, ArrayList<Object> sunsList) {
    this.mContext = context;
    this.mSunsList = sunsList;
  }

  public class MyViewHolder extends RecyclerView.ViewHolder {

    private TextView textViewId;
    private TextView textViewSicon;
    private TextView textViewStime;
    private TextView textViewEicon;
    private TextView textViewEtime;
    private TextView ntextViewSicon;
    private TextView ntextViewStime;
    private TextView ntextViewEicon;
    private TextView ntextViewEtime;

    MyViewHolder(View itemView) {
      super(itemView);
      textViewId = itemView.findViewById(R.id.tv_city);
      textViewSicon = itemView.findViewById(R.id.tv_MSicon);
      textViewStime = itemView.findViewById(R.id.tv_MStime);
      textViewEicon = itemView.findViewById(R.id.tv_MEicon);
      textViewEtime = itemView.findViewById(R.id.tv_MEtime);
      ntextViewSicon = itemView.findViewById(R.id.tv_NSicon);
      ntextViewStime = itemView.findViewById(R.id.tv_NStime);
      ntextViewEicon = itemView.findViewById(R.id.tv_NEicon);
      ntextViewEtime = itemView.findViewById(R.id.tv_NEtime);
//    mSportsImage = itemView.findViewById(R.id.sportsImage);
    }
  }


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

  @Override
  public int getItemViewType(int position) {
    Object sunList = mSunsList.get(position);
    if (sunList instanceof UnifiedNativeAd) {
      return UNIFIED_NATIVE_AD_VIEW_TYPE;
    }
    return MENU_ITEM_VIEW_TYPE;
  }

  @Override
  public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
    switch (viewType) {
      case UNIFIED_NATIVE_AD_VIEW_TYPE:
        View unifiedNativeLayoutView = LayoutInflater.from(
            viewGroup.getContext()).inflate(R.layout.ad_unified,
            viewGroup, false);
        return new UnifiedNativeAdViewHolder(unifiedNativeLayoutView);
      case MENU_ITEM_VIEW_TYPE:
        // Fall through.
      default:
        View menuItemLayoutView = LayoutInflater.from(viewGroup.getContext()).inflate(
            R.layout.card_item, viewGroup, false);
        return new MyViewHolder(menuItemLayoutView);
    }
  }

  // @RequiresApi(api = Build.VERSION_CODES.N)
  @Override
  public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    int viewType = getItemViewType(position);
    switch (viewType) {
      case UNIFIED_NATIVE_AD_VIEW_TYPE:
        UnifiedNativeAd nativeAd = (UnifiedNativeAd) mSunsList.get(position);
        populateNativeAdView(nativeAd, ((UnifiedNativeAdViewHolder) holder).getAdView());
        break;
      case MENU_ITEM_VIEW_TYPE:
        // fall through
      default:
        MyViewHolder myViewHolder = (MyViewHolder) holder;
        SunSession sunSession = (SunSession) mSunsList.get(position);
        myViewHolder.textViewId.setText(sunSession.getId());
        myViewHolder.textViewSicon.setText(HtmlCompat.fromHtml(sunSession.getSicon(), HtmlCompat.FROM_HTML_MODE_LEGACY));
        myViewHolder.textViewStime.setText(sunSession.getStime());
        myViewHolder.textViewEicon.setText(HtmlCompat.fromHtml(sunSession.getEicon(), HtmlCompat.FROM_HTML_MODE_LEGACY));
        myViewHolder.textViewEtime.setText(sunSession.getEtime());
        myViewHolder.ntextViewSicon.setText(HtmlCompat.fromHtml(sunSession.getNSicon(), HtmlCompat.FROM_HTML_MODE_LEGACY));
        myViewHolder.ntextViewStime.setText(sunSession.getNStime());
        myViewHolder.ntextViewEicon.setText(HtmlCompat.fromHtml(sunSession.getNEicon(), HtmlCompat.FROM_HTML_MODE_LEGACY));
        myViewHolder.ntextViewEtime.setText(sunSession.getNEtime());
    }
  }



  private void populateNativeAdView(UnifiedNativeAd nativeAd,
                                    UnifiedNativeAdView adView) {
    // Some assets are guaranteed to be in every UnifiedNativeAd.
    ((TextView) adView.getHeadlineView()).setText(nativeAd.getHeadline());
    ((TextView) adView.getBodyView()).setText(nativeAd.getBody());
    ((Button) adView.getCallToActionView()).setText(nativeAd.getCallToAction());

    // These assets aren't guaranteed to be in every UnifiedNativeAd, so it's important to
    // check before trying to display them.
    NativeAd.Image icon = nativeAd.getIcon();

    if (icon == null) {
      adView.getIconView().setVisibility(View.INVISIBLE);
    } else {
      ((ImageView) adView.getIconView()).setImageDrawable(icon.getDrawable());
      adView.getIconView().setVisibility(View.VISIBLE);
    }

    if (nativeAd.getPrice() == null) {
      adView.getPriceView().setVisibility(View.INVISIBLE);
    } else {
      adView.getPriceView().setVisibility(View.VISIBLE);
      ((TextView) adView.getPriceView()).setText(nativeAd.getPrice());
    }

    if (nativeAd.getStore() == null) {
      adView.getStoreView().setVisibility(View.INVISIBLE);
    } else {
      adView.getStoreView().setVisibility(View.VISIBLE);
      ((TextView) adView.getStoreView()).setText(nativeAd.getStore());
    }

    if (nativeAd.getStarRating() == null) {
      adView.getStarRatingView().setVisibility(View.INVISIBLE);
    } else {
      ((RatingBar) adView.getStarRatingView())
          .setRating(nativeAd.getStarRating().floatValue());
      adView.getStarRatingView().setVisibility(View.VISIBLE);
    }

    if (nativeAd.getAdvertiser() == null) {
      adView.getAdvertiserView().setVisibility(View.INVISIBLE);
    } else {
      ((TextView) adView.getAdvertiserView()).setText(nativeAd.getAdvertiser());
      adView.getAdvertiserView().setVisibility(View.VISIBLE);
    }

    // Assign native ad object to the native view.
    adView.setNativeAd(nativeAd);
  }
}

广告已在 MainActivity 中初始化为:

MobileAds.initialize(this, getString(R.string.admob_app_id));

代码没有显示错误，并且 SunList 数组(即 MENU_ITEM_VIEW_TYPE)正确显示。但广告 View (即 UNIFIED_NATIVE_AD_VIEW_TYPE)没有显示任何迹象，甚至作为占位符也没有显示。

该 fragment 由 MainActivity 作为 viewpager(由默认选项卡式 Activity 生成)调用，如下所示:

    SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(this,
            getSupportFragmentManager(), Lat, Long);

我在这里做错了什么？

注意:我正在使用 firebase

更新我怀疑，

 @Override
  public int getItemViewType(int position) {
    Object sunList = mSunsList.get(position);
    if (sunList instanceof UnifiedNativeAd) {
      System.out.println("==================Hello==============");
      return UNIFIED_NATIVE_AD_VIEW_TYPE;
    }
    return MENU_ITEM_VIEW_TYPE;
  } 

从来都不是真的。该字符串从未打印过

更新可能我已经发现了问题，但不知道如何解决:

如果我将 getItemViewType 更改为:

  public int getItemViewType(int position) {
    Object sunList = mSunsList.get(position);
//    if (sunList instanceof UnifiedNativeAd) {
    if (position%3==0){
      System.out.println("=================="+position+"==============");
      return UNIFIED_NATIVE_AD_VIEW_TYPE;
    }
    return MENU_ITEM_VIEW_TYPE;
  }

然后我收到错误:

java.lang.ClassCastException: com.example.phocast.ui.main.SunSession cannot be cast to com.google.android.gms.ads.formats.UnifiedNativeAd

在onBindViewHolder中的这一行:

UnifiedNativeAd nativeAd = (UnifiedNativeAd) mSunsList.get(position);

请帮忙

Answer 1

在recyclerview中添加显示时可以加载添加。不在 Activity 中