Java Recycerview更改错误的项目
这是我的recyclerview适配器类Java Recycerview更改错误的项目,java,android,Java,Android,这是我的recyclerview适配器类 public class WebsiteAdapter extends RecyclerView.Adapter<WebsiteAdapter.WebsiteHolder> { private List<Website> websites = new ArrayList<>(); private WebsiteViewModel websiteViewModel; WebsiteAda
public class WebsiteAdapter extends RecyclerView.Adapter<WebsiteAdapter.WebsiteHolder> {
private List<Website> websites = new ArrayList<>();
private WebsiteViewModel websiteViewModel;
WebsiteAdapter(WebsiteViewModel viewModel){
this.websiteViewModel = viewModel;
}
@NonNull
@Override
public WebsiteHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.website_item, parent, false);
return new WebsiteHolder(itemView);
}
@Override
public void onBindViewHolder(@NonNull final WebsiteHolder holder, final int position) {
final Website currentWebsite = websites.get(position);
final Boolean bookmarkStatus = currentWebsite.getFavourite();
final List<WebPage> webPages = websiteViewModel.getRepository().getAllWebPagesForWebsite(currentWebsite.getWebsite_id());
holder.textViewTitle.setText(currentWebsite.getWebsiteName());
if(currentWebsite.getDescription() != null){
holder.textViewDescription.setText(currentWebsite.getDescription());
holder.textViewDescription.setVisibility(View.VISIBLE);
}
if(webPages!=null && !webPages.isEmpty()) {
holder.secondaryAdapter.setWebPages(webPages);
holder.expandCollapse.setVisibility(View.VISIBLE);
}
if(bookmarkStatus){
holder.isBookmarked = true;
holder.bookmarkButton.setBackgroundResource(R.drawable.ic_bookmark_24px);
} else {
holder.isBookmarked = false;
holder.bookmarkButton.setBackgroundResource(R.drawable.ic_bookmark_border_24px);
}
holder.cardViewWebsite.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String websiteUrl = currentWebsite.getWebsite_url();
System.out.println("Description = " + currentWebsite.getDescription() + ", boomarked : " + currentWebsite.getFavourite());
List<WebPage> webPages = websiteViewModel.getRepository().getAllWebPagesForWebsite(currentWebsite.getWebsite_id());
for(WebPage webPage : webPages){
System.out.println("Web pages: ");
System.out.println(webPage.toString() + ", ");
}
launchWebsite(v.getContext(), websiteUrl);
}
});
holder.bookmarkButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
System.out.println("Website bookmarked before click : " + bookmarkStatus + ", Description is : " + currentWebsite.getDescription());
currentWebsite.setFavourite(!bookmarkStatus);
System.out.println("Website bookmark clicked, status has been set to : " + currentWebsite.getFavourite());
websiteViewModel.getRepository().websiteDao.updateWebsite(currentWebsite);
notifyItemChanged(position);
}
});
}
private void launchWebsite(Context context, String URL) {
CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
builder.setStartAnimations(context, R.anim.push_off_screen_left, R.anim.push_onto_screen_from_right);
builder.setExitAnimations(context, R.anim.push_onto_screen_from_left, R.anim.push_off_screen_right);
CustomTabsIntent customTabsIntent = builder.build();
customTabsIntent.launchUrl(context,Uri.parse(URL));
}
@Override
public int getItemCount() {
return websites.size();
}
public void setWebsites(List<Website> websites) {
this.websites = websites;
notifyDataSetChanged();
}
class WebsiteHolder extends RecyclerView.ViewHolder {
private TextView textViewTitle;
private TextView textViewDescription;
private CardView cardViewWebsite;
private boolean isBookmarked; // ALSO FAVOURITED
private boolean isExpanded = false;
private Button expandCollapse;
private Button bookmarkButton;
private SecondaryAdapter secondaryAdapter;
private RecyclerView childRecyclerView;
public WebsiteHolder(View itemView) {
super(itemView);
textViewTitle = itemView.findViewById(R.id.text_view_title);
textViewDescription = itemView.findViewById(R.id.text_view_description);
cardViewWebsite = itemView.findViewById(R.id.cardViewWebsite);
bookmarkButton = itemView.findViewById(R.id.bookmarkButton);
childRecyclerView = itemView.findViewById(R.id.childRecyclerview);
expandCollapse = itemView.findViewById(R.id.expandCollapse);
expandCollapse.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isExpanded) {
collapseView();
} else {
expandView();
}
}
});
childRecyclerView.setLayoutManager(new LinearLayoutManager(itemView.getContext(), LinearLayoutManager.HORIZONTAL, false));
LayoutAnimationController animation = AnimationUtils.loadLayoutAnimation(itemView.getContext(), R.anim.layout_animation_slide_in);
childRecyclerView.setLayoutAnimation(animation);
childRecyclerView.setHasFixedSize(true);
secondaryAdapter = new SecondaryAdapter();
childRecyclerView.setAdapter(secondaryAdapter);
}
private void collapseView() {
isExpanded = false;
childRecyclerView.setVisibility(View.GONE);
}
private void expandView() {
isExpanded = true;
childRecyclerView.setVisibility(View.VISIBLE);
}
}
}
我遇到的问题是,当我按下项目A上的书签按钮时:另一个项目上的展开按钮将在不应该的时候出现。B:第二个RecyclerView设置为其他网站。我如何调试这个?有没有什么东西被认为是罪魁祸首?我觉得我把东西放错地方了。非常感谢
多亏了这篇文章,我在bindView方法中添加了一条语句,第二条:添加了ELSE语句来否定if语句。问题已解决:目前:尝试在OnBinderViewWholder下打印websites.getposition,以确认您得到的结果正确。还有,当它错误地添加书签时,它仅仅是一个书签,还是看起来是随机的?它看起来是随机的,但它是没有其他语句来否定ifs的结果