我已经实现了具有多种视图类型的 recyclerview，并且我想添加 DiffUtil。我设法为一种类型做到了，但是当我尝试支持多种视图类型时，我不能
所以我的问题是：DiffUtil 是否支持多种视图类型，是否有一个很好的 java 实现教程
我的适配器
public class PostsAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final int VIEW_TYPE_ITEM = 0;
private final int VIEW_TYPE_AD = 1;
private final int VIEW_TYPE_CATEGORIES = 2;
private final int VIEW_TYPE_NULL = 99;
private Context context;
private List<Object> postList;
public PostsAdapter() {
}
/*public PostsAdapter() {
super(Post.DIFF_CALLBACK);
}*/
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
context = parent.getContext();
switch (viewType){
case VIEW_TYPE_ITEM:
View viewItem = LayoutInflater.from(context).inflate(R.layout.item_post,
parent, false);
return new ItemViewHolder(viewItem);
case VIEW_TYPE_AD:
View unifiedNativeLayoutView = LayoutInflater.from(context).inflate(R.layout.item_ads,
parent, false);
return new AdsViewHolder(unifiedNativeLayoutView);
case VIEW_TYPE_CATEGORIES:
View viewCategories = LayoutInflater.from(context).inflate(R.layout.item_categories,
parent, false);
return new HorizontalItemViewHolder(viewCategories);
default:
View viewLoading = LayoutInflater.from(context).inflate(R.layout.item_loading,
parent, false);
return new LoadingViewHolder(viewLoading);
}
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
int viewType = getItemViewType(position);
switch (viewType){
case VIEW_TYPE_ITEM:
populateItemRows((ItemViewHolder) holder, position);
break;
case VIEW_TYPE_AD:
populateNativeAdModule((AdsViewHolder) holder, position);
break;
case VIEW_TYPE_CATEGORIES:
populateHorizontalItems((HorizontalItemViewHolder) holder, position);
default:
showLoadingView();
}
}
@Override
public int getItemViewType(int position) {
Object recyclerViewItem = postList.get(position);
if(recyclerViewItem instanceof UnifiedNativeAd){
return VIEW_TYPE_AD;
}else if(postList.get(position) == null){
return VIEW_TYPE_NULL;
// Empty Ad view
}else{
return VIEW_TYPE_ITEM;
}
}
@Override
public int getItemCount() {
return 0;
}
private static class ItemViewHolder extends RecyclerView.ViewHolder {
private CardView cardView1;
ItemViewHolder(@NonNull View itemView) {
super(itemView);
cardView1 = itemView.findViewById(R.id.cv_post);
}
void setName(String text1) {
TextView name = itemView.findViewById(R.id.name);
name.setText(text1);
}
}
private static class HorizontalItemViewHolder extends RecyclerView.ViewHolder {
private RecyclerView RV;
HorizontalItemViewHolder(@NonNull View itemView) {
super(itemView);
// Samedi
RV = itemView.findViewById(R.id.rv_categories);
}
}
private static class AdsViewHolder extends RecyclerView.ViewHolder {
TemplateView template ;
AdsViewHolder(@NonNull View itemView) {
super(itemView);
template = itemView.findViewById(R.id.adview_feed);
}
}
private static class LoadingViewHolder extends RecyclerView.ViewHolder {
LoadingViewHolder(@NonNull View itemView) {
super(itemView);
//progressBar = itemView.findViewById(R.id.progressBar);
}
}
private void showLoadingView() {
//ProgressBar would be displayed
}
private void populateItemRows(final ItemViewHolder holder, final int position) {
// ***** Codes ///
}
private void populateHorizontalItems(final HorizontalItemViewHolder holder, final int position){
// ***** Codes ///
}
private void populateNativeAdModule(AdsViewHolder nativeAdHolder,
final int position ){
// ***** ADS Codes ///
}
}
}