我正在尝试使用基于列表类别的自定义分段标题来实现 RecyclerView。我已经有一个根据类别排序的列表,所以当且仅当一行的类别与前一行的类别不同时,我想膨胀标题。我一直在弄清楚如何去做,但这里有些事情困扰着我。它有效,但不显示正确的行。我认为这是因为标题导致项目数量增加。谁能帮帮我?
这是我的适配器:
List<Notes> notes;
OnItemClickListener mItemClickListener;
private static final int TYPE_CATEGOORY = 0;
private static final int TYPE_ITEM = 1;
String changing = "";
public OneNoteAdapter(List<Notes> logs) {
this.notes = logs;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if(viewType == TYPE_CATEGOORY){
View itemView = LayoutInflater.
from(parent.getContext()).
inflate(R.layout.category_header, parent, false);
return new HeaderViewHolder(itemView);
}else{
View itemView = LayoutInflater.
from(parent.getContext()).
inflate(R.layout.learn_card, parent, false);
return new ItemViewHolder(itemView);
}
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if(holder instanceof HeaderViewHolder){
Notes note = notes.get(position);
((HeaderViewHolder) holder).vCategoryText.setText(note.category);
}else {
ItemViewHolder item = (ItemViewHolder) holder;
Notes note = notes.get(position);
item.vNotesNote.setText(note.notes);
item.vNotesCat.setText(note.category);
}
}
@Override
public int getItemViewType(int position) {
if((!(notes.get(position).category).equals(changing))){
changing = notes.get(position).category;
return TYPE_CATEGOORY;
}else{
return TYPE_ITEM;
}
}
@Override
public int getItemCount() {
return notes.size();
}
public class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
protected TextView vNotesNote, vNotesCat;
private final Context context;
public ItemViewHolder(View itemView) {
super(itemView);
vNotesNote = (TextView) itemView.findViewById(R.id.notes_notes);
vNotesCat = (TextView) itemView.findViewById(R.id.notes_category);
context = itemView.getContext();
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if(mItemClickListener != null){
mItemClickListener.onItemClick(v, getPosition());
}
}
}
public class HeaderViewHolder extends RecyclerView.ViewHolder {
protected TextView vCategoryText;
public HeaderViewHolder(View itemView) {
super(itemView);
vCategoryText = (TextView) itemView.findViewById(R.id.category_header_text);
}
}
public interface OnItemClickListener{
public void onItemClick(View v, int poition);
}
public void setOnItemClickListener (final OnItemClickListener mItemClickListener){
this.mItemClickListener = mItemClickListener;
}
谢谢
最佳答案
尝试用以下方法替换您的 onBindViewHolder
和 getItemViewType
方法:
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (holder instanceof HeaderViewHolder) {
((HeaderViewHolder) holder).vCategoryText.setText(notes.get(position + 1).category);
} else {
ItemViewHolder item = (ItemViewHolder) holder;
Notes note = notes.get(position);
item.vNotesNote.setText(note.notes);
item.vNotesCat.setText(note.category);
if (position + 1 < notes.size() &&
!notes.get(position + 1).category.equals(note.category)) {
notes.add(position + 1, null);
}
}
}
@Override
public int getItemViewType(int position) {
if (notes.get(position) == null) {
return TYPE_CATEGOORY;
} else {
return TYPE_ITEM;
}
}
并且您可以删除 String changing = "";
。
关于android - 使用基于类别的分段标题实现 RecyclerView,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35682292/