[英]RecyclerView - How do I pass the position of onBindViewHolder to my ViewHolder class?
I am trying to setup onClickListeners inside my ViewHolder class, but I need the position of each. 我正在尝试在ViewHolder类中设置onClickListeners,但是我需要每个位置。 How can I pass the position from onBindViewHolder to my ViewHolder class? 如何将位置从onBindViewHolder传递给ViewHolder类?
@NonNull
@Override
public AdapterAllComments.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.model_rv_allcomments_container, viewGroup, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull AdapterAllComments.ViewHolder viewHolder, int position) {
}
@Override
public int getItemCount() {
return mCommentId.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
LinearLayout viewHolderLayout;
public ViewHolder(@NonNull View itemView) {
super(itemView);
viewHolderLayout = itemView.findViewById(R.id.item_child_layout);
}
}
this adapter from my other project : 这个适配器来自我的其他项目:
public class ChildrenRvAdapter extends RecyclerView.Adapter<ChildrenRvAdapter.ViewHolder> {
private List<String> mData;
private LayoutInflater mInflater;
private ItemClickListener mClickListener;
private Context context;
public ChildrenRvAdapter(Context context, List<String> data) {
this.mInflater = LayoutInflater.from(context);
this.mData = data;
this.context = context;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.children_rv_row, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
String name = mData.get(position);
holder.tv_name.setText(name);
setAnimation(holder.itemView, position);
}
@Override
public int getItemCount() {
return mData.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView tv_name;
Button btn_remove;
ViewHolder(View itemView) {
super(itemView);
tv_name = itemView.findViewById(R.id.tv_name);
btn_remove = itemView.findViewById(R.id.btn_remove);
btn_remove.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
}
}
String getItem(int id) {
return mData.get(id);
}
public void setClickListener(ItemClickListener itemClickListener) {
this.mClickListener = itemClickListener;
}
public interface ItemClickListener {
void onItemClick(View view, int position);
}
}
}
so you create interface
in your adapter and also declare it in local mClickListener
and implement it in ViewHolder class and setonclick
where you create the viewholder
: 因此,您可以在适配器中创建interface
,还可以在本地mClickListener
声明interface
,并在ViewHolder类和setonclick
在创建setonclick
位置进行viewholder
:
ViewHolder(View itemView) {
super(itemView);
tv_name = itemView.findViewById(R.id.tv_name);
btn_remove = itemView.findViewById(R.id.btn_remove);
btn_remove.setOnClickListener(this);
}
just note that i set it on a button
but you can set it on itemView
also on any view
that have the setOnClickListener
so you can use : 只是请注意,我把它放在一个button
但你可以把它放在itemView
还上的任何view
认为有setOnClickListener
所以你可以使用:
itemView.setOnClickListener(this);
then from your activity or fragment and wherever using the adapter, just implemet the onlick
interface
and after initializing the adapter use the method that we created public void setClickListener
in our adapter, to local interface in the adapter 然后从您的活动或片段以及无论使用适配器的任何地方,只需实现onlick
interface
并在初始化适配器后,使用我们在适配器中创建public void setClickListener
onlick
的方法,即可到适配器的本地接口
public void setClickListener(ItemClickListener itemClickListener) {
this.mClickListener = itemClickListener;
}
activity: 活动:
public class ChildrenEditDialog extends Dialog implements IChildren.IView, ChildrenRvAdapter.ItemClickListener
and in activity onCreate
or somewhere else: 在活动onCreate
或其他地方:
childrenRvAdapter = new ChildrenRvAdapter(c, dataSource);
childrenRvAdapter.setClickListener(this);
and you have onlcick in your activity/fragment/dialog/etc... 并且您的活动/片段/对话/等中有onlcick ...
使用ViewHolders getAdapterPosition()
获取ViewHolder的当前位置。
To get the current position of the onBindViewHolder to ViewHolder class getAdapterPosition()
can be used. 要将onBindViewHolder的当前位置获取到ViewHolder类,可以使用getAdapterPosition()
。
As an example, 举个例子,
public class ViewHolder extends RecyclerView.ViewHolder{
LinearLayout viewHolderLayout;
viewHolderLayout = itemView.findViewById(R.id.item_child_layout);
public ViewHolder(@NonNull View itemView) {
super(itemView);
viewHolderLayout.setOnClickListener(v -> {
lastClickedPosition = getAdapterPosition();
});
}
}
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