如果有人可以幫助我。我有一個RecyclerView項目,但當我嘗試選擇ONE項目,我可以選擇很多項目。我認爲問題出在onClick回調中,但我不確切地知道。這是適配器代碼:Android很多項目選擇RecyclerView
public class HorizontalRecyclerViewAdapter extends RecyclerView
.Adapter<HorizontalRecyclerViewAdapter
.DataObjectHolder> {
private ArrayList<HorizontalData> mDataset;
private static MyClickListener myClickListener;
private SparseBooleanArray selectedItem = new SparseBooleanArray();
public class DataObjectHolder extends RecyclerView.ViewHolder
implements View
.OnClickListener {
TextView mLabel;
TextView mDateTime;
LinearLayout linearLayout;
public DataObjectHolder(View itemView) {
super(itemView);
mLabel = (TextView) itemView.findViewById(R.id.item_list_view_text_view);
mDateTime = (TextView) itemView.findViewById(R.id.item_list_view_text_view_two);
linearLayout = (LinearLayout) itemView.findViewById(R.id.myBackground);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (selectedItem.get(getAdapterPosition(), false)) {
selectedItem.delete(getAdapterPosition());
v.setSelected(false);
} else {
selectedItem.put(getAdapterPosition(), true);
v.setSelected(true);
}
myClickListener.onItemClick(getAdapterPosition(), v);
}
}
public void setOnItemClickListener(MyClickListener myClickListener) {
this.myClickListener = myClickListener;
}
public HorizontalRecyclerViewAdapter(ArrayList<HorizontalData> myDataset) {
mDataset = myDataset;
}
@Override
public DataObjectHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.date_item, parent, false);
DataObjectHolder dataObjectHolder = new DataObjectHolder(view);
return dataObjectHolder;
}
@Override
public void onBindViewHolder(DataObjectHolder holder, int position) {
holder.linearLayout.setSelected(selectedItem.get(position, false));
holder.mLabel.setText(mDataset.get(position).getmTitle());
holder.mDateTime.setText(mDataset.get(position).getmSubTitle());
}
@Override
public int getItemCount() {
return mDataset.size();
}
public interface MyClickListener {
void onItemClick(int position, View v);
}
}
謝謝!
如果您只想選擇一個項目,爲什麼要使用'SparseBooleanArray'? –
那麼我將如何繼續? –
'int currentlySelectedItemPos'。應該夠了。當沒有選擇項目時,'-1'的值將會是。 –