获取RecyclerView上ViewHolder的参考资料单击
获取RecyclerView上ViewHolder的参考资料单击
提问于 2014-11-12 22:28:22
这是我第一次尝试实现RecyclerView。我在Adapter和Click类之间实现了一个Callback接口来处理UI元素(按钮)上的ViewHolder事件。我在获取发生单击的ViewHolder的引用时遇到问题。我可以单击列表中第一个项目的Button，但是，我定义的操作是在回收器视图中的最后一个viewholder上执行的。我终于想出了通过我的界面来传递这个职位，但我正在努力理解如何从它中获得对那个vieholder`的引用。
public class RoomAdapter extends RecyclerView.Adapter<RoomAdapter.RoomViewHolder>
{
List<Room> mRooms;
public RoomAdapter(List<Room> rooms) {
mRooms = rooms;
}
@Override
public RoomViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
final View viewItem = LayoutInflater
.from(viewGroup.getContext())
.inflate(R.layout.room_rv_item,viewGroup,false);
return vh = new RoomViewHolder(viewItem,new IRoomViewClick() {
@Override
public void editname(int pos) {
}
});
}
@Override
public void onBindViewHolder(RoomViewHolder roomViewHolder, int i) {
Room r = getItem(i);
roomViewHolder.label.setText(r.name);
}
public Room getItem(int position)
{
return mRooms.get(position);
}
@Override
public long getItemId(int position) {
return mRooms.get(position).getId();
}
@Override
public int getItemCount() {
return mRooms.size();
}
public static class RoomViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
{
TextView label;
Button editBtn;
LinearLayout labelView;
Button saveBtn;
Button deleteBtn;
EditText editNameET;
IRoomViewClick mListener;
public RoomViewHolder(View itemView, IRoomViewClick listener) {
super(itemView);
labelView = (LinearLayout) itemView.findViewById(R.id.labelview);
mListener = listener;
editBtn =(Button) itemView.findViewById(R.id.editbtn);
editBtn.setOnClickListener(this);
label = (TextView) itemView.findViewById(R.id.room_listitem_label);
}
@Override
public void onClick(View view) {
int pos = getPosition();
mListener.editname(pos);
}
}
public static interface IRoomViewClick
{
public void editname(int pos);
}
}
回答 4
Stack Overflow用户
回答已采纳
发布于 2014-11-15 11:54:11
您可以在onBindViewHolder中为editBtn设置标记
public RoomViewHolder(View itemView, IRoomViewClick listener) {
....
editBtn =(Button) itemView.findViewById(R.id.editbtn);
//add tag for this view
editBtn.setTag(this);
....
}并在onClick中获取它
@Override
public void onClick(View view) {
//getTag
RoomViewHolder holder = (RoomViewHolder )(view.getTag());
int pos = getPosition();
mListener.editname(pos);
...
}Stack Overflow用户
发布于 2016-06-09 10:48:43
实际上，你可以通过在getTag上调用getChildViewHolder(View child)来做比RecyclerView更好的事情：
@Override
public void onClick(View v) {
MyHolder holder = (MyHolder) mRecyclerView.getChildViewHolder(v);
holder.textView.setText("Clicked!");
}Stack Overflow用户
发布于 2015-08-11 00:29:01
@Override
public void onClick(View v) {
int pos = getAdapterPosition(); //getPosition() is deprecated
notifyItemChanged(pos);
}notifyItemChanged会通知你的onBindViewHolder，然后你就可以这样做了
public void onBindViewHolder(RoomViewHolder roomViewHolder, int i) {
Room r = getItem(i);
roomViewHolder.label.setText(r.name);
if(i == pos){ // Do Something }
}无论何时点击该项目，它都会更改pos的值，并触发//执行某些操作
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/26889361
复制相关文章
相似问题