我有一个RecyclerView,当我点击第一个视图时,会像图片中一样添加另一个视图,我的目标是将ID为“1”的“添加”视图固定在recycler的最后一个位置,而不是第一个位置。
![enter image description here](https://istack.dev59.com/Lf3uJ.webp)
我的适配器:
public class AddEventsAdapter extends RecyclerView.Adapter<AddEventsAdapter.ViewHolder> {
private List<String> items = new ArrayList<>();
public void addItem(String name) {
items.add(name);
notifyItemInserted(items.size() - 1);
}
public void removeItem(int position) {
items.remove(position);
notifyItemRemoved(position);
notifyItemRangeChanged(position, items.size());
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View view = inflater.inflate(R.layout.add_event_item, parent, false);
return new ViewHolder(view);
}
@Override
public int getItemCount() {
return items.size();
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.setEventNameName(i + "");
if(position == 0)
{
holder.theLayout.setBackgroundColor(Color.parseColor("#7F9099"));
holder.eventName.setText("Add");
}
}
static int i;
class ViewHolder extends RecyclerView.ViewHolder{
public TextView eventName;
public RelativeLayout theLayout;
public ViewHolder(final View itemView) {
super(itemView);
eventName = (TextView)itemView.findViewById(R.id.eventName);
theLayout = (RelativeLayout)itemView.findViewById(R.id.backgroundevent);
theLayout.setId(++i);
theLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (getAdapterPosition()>0){
removeItem(getAdapterPosition());
}else {
addItem("");
}
}
});
}
public void setEventNameName(String TheEventName){
eventName.setText(TheEventName);
}
}
}
在这个活动中:
final AddEventsAdapter AddContainer = new AddEventsAdapter();
AddEventsRecycler.setLayoutManager(new LinearLayoutManager(this));
AddEventsRecycler.setAdapter(AddContainer);
AddEventsRecycler.setItemViewCacheSize(666);
RecyclerView.ItemAnimator itemAnimator = new DefaultItemAnimator();
itemAnimator.setAddDuration(1000);
itemAnimator.setRemoveDuration(1000);
AddEventsRecycler.setItemAnimator(itemAnimator);
AddContainer.addItem("");