我，已经在Android中实现了recyclerview。现在，我正在尝试在android中实现高级原生广告。为此，我一直在关注Google Codelabs教程。 Link of the tutorial。但是我没有成功。下面是我的recyclerview代码。然后是我尝试在recyclerview中实施高级原生广告的代码。
Recyclerview适配器：
public class CouponDealsAdapter extends RecyclerView.Adapter<CouponDealsAdapter.ViewHolder> {
public List<CouponDeal> couponDeals;
public Context context;
public CouponDealsAdapter(Context context, List<CouponDeal> couponDeals) {
this.couponDeals = couponDeals;
this.context = context;
}
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView store_name;
View mView;
public ViewHolder(View itemView) {
super(itemView);
mView = itemView;
store_name = (TextView) mView.findViewById(R.id.couponDeals_storeName);
}
}
@Override
public int getItemCount() {
return couponDeals.size();
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.coupons_deal, parent, false);
final ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
if (TextUtils.isEmpty(couponDeals.get(position).getStore_name())) {
holder.store_name.setText("Not Available");
} else {
holder.store_name.setText(couponDeals.get(position).getStore_name());
}
}
}
UnifiedNativeAdViewHolder：
公共类UnifiedNativeAdViewHolder扩展了RecyclerView.ViewHolder {
private UnifiedNativeAdView adView;
public UnifiedNativeAdView getAdView() {
return adView;
}
UnifiedNativeAdViewHolder(View view) {
super(view);
adView = (UnifiedNativeAdView) view.findViewById(R.id.ad_view);
// The MediaView will display a video asset if one is present in the ad, and the
// first image asset otherwise.
adView.setMediaView((MediaView) adView.findViewById(R.id.ad_media));
// Register the view used for each individual asset.
adView.setHeadlineView(adView.findViewById(R.id.ad_headline));
adView.setBodyView(adView.findViewById(R.id.ad_body));
adView.setCallToActionView(adView.findViewById(R.id.ad_call_to_action));
adView.setIconView(adView.findViewById(R.id.ad_icon));
adView.setPriceView(adView.findViewById(R.id.ad_price));
adView.setStarRatingView(adView.findViewById(R.id.ad_stars));
adView.setStoreView(adView.findViewById(R.id.ad_store));
adView.setAdvertiserView(adView.findViewById(R.id.ad_advertiser));
}
Recyclerview Adapter和Add Implementation遵循codelab的教程。
public class CouponDealsAdapter extends RecyclerView.Adapter<CouponDealsAdapter.ViewHolder> {
private static final int MENU_ITEM_VIEW_TYPE = 0;
private static final int UNIFIED_NATIVE_AD_VIEW_TYPE = 1;
public List<CouponDeal> couponDeals;
public Context context;
public CouponDealsAdapter(Context context, List<CouponDeal> couponDeals) {
this.couponDeals = couponDeals;
this.context = context;
}
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView store_name;
View mView;
public ViewHolder(View itemView) {
super(itemView);
mView = itemView;
store_name = (TextView) mView.findViewById(R.id.couponDeals_storeName);
}
}
@Override
public int getItemCount() {
return couponDeals.size();
}
@Override
public int getItemViewType(int position) {
Object recyclerViewItem = couponDeals.get(position);
if (recyclerViewItem instanceof UnifiedNativeAd) {
return UNIFIED_NATIVE_AD_VIEW_TYPE;
}
return MENU_ITEM_VIEW_TYPE;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case UNIFIED_NATIVE_AD_VIEW_TYPE:
View unifiedNativeLayoutView = LayoutInflater.from(
parent.getContext()).inflate(R.layout.ad_unified,
parent, false);
return new UnifiedNativeAdViewHolder(unifiedNativeLayoutView);
case MENU_ITEM_VIEW_TYPE:
default:
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.coupons_deal, parent, false);
return new ViewHolder(view);
}
}
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
int viewType = getItemViewType(position);
switch (viewType) {
case UNIFIED_NATIVE_AD_VIEW_TYPE:
UnifiedNativeAd nativeAd = (UnifiedNativeAd) couponDeals.get(position);
populateNativeAdView(nativeAd, ((UnifiedNativeAdViewHolder) holder).getAdView());
break;
case MENU_ITEM_VIEW_TYPE:
// fall through
default:
if (TextUtils.isEmpty(couponDeals.get(position).getStore_name())) {
holder.store_name.setText("Not Available");
} else {
holder.store_name.setText(couponDeals.get(position).getStore_name());
}
}
}
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);
}
}
我不知道这是否是实现它的正确方法。我只是遵循codelabs教程。我也遇到一些错误。下面提到。
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case UNIFIED_NATIVE_AD_VIEW_TYPE:
View unifiedNativeLayoutView = LayoutInflater.from(
parent.getContext()).inflate(R.layout.ad_unified,
parent, false);
return new UnifiedNativeAdViewHolder(unifiedNativeLayoutView);
case MENU_ITEM_VIEW_TYPE:
在这段代码中，我在这一行中遇到错误。 返回新的UnifiedNativeAdViewHolder（unifiedNativeLayoutView）;
错误是：不兼容的类型：
必需：com.release.adapter.RecyclerViewAdapter.ViewHolder
找到：com.release.adapter.UnifiedNativeAdViewHolder
另一个错误：
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
int viewType = getItemViewType(position);
switch (viewType) {
case UNIFIED_NATIVE_AD_VIEW_TYPE:
UnifiedNativeAd nativeAd = (UnifiedNativeAd) couponDeals.get(position);
populateNativeAdView(nativeAd, ((UnifiedNativeAdViewHolder) holder).getAdView());
break;
此行出现错误。 UnifiedNativeAd nativeAd =（UnifiedNativeAd）couponDeals.get（position）;
错误：不兼容的类型：RecyclerViewAdapter.ViewHolder无法转换为UnifiedNativeAdViewHolder
请帮助我解决这些错误。这是正确的实施方式。或者，请告诉编写代码以实施高级原生广告。