Question

我需要使用Android Recycler View来解决如何执行以下操作的问题。

我有多个图像，我只需要选择一个图像，就像单选按钮的工作方式一样。现在我可以选择我拥有的所有图像，但我需要限制当前的工作行为，就像单选按钮（例如）如果选择了一个，我不应该选择其他图像。

我尝试使用以下代码，但对我来说没有运气。任何人都可以纠正错误，并根据我的需要使代码可行。

public class StarCountAdapter extends RecyclerView.Adapter<StarCountAdapter.StarCountHolder> {
    Context context;
    LayoutInflater inflater;
    List<StarCount> starCounts = new ArrayList<>();

    public StarCountAdapter(Context context, List<StarCount> starCounts) {
        this.context = context;
        this.inflater = LayoutInflater.from(context);
        this.starCounts = starCounts;
    }

    @Override
    public StarCountHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = inflater.inflate(R.layout.star_count_row,parent,false);
        return new StarCountHolder(view);
    }

    @Override
    public void onBindViewHolder(StarCountHolder holder, int position) {
        StarCount model = starCounts.get(position);
        Picasso.with(context)
                .load("http://"+model.getImagePath())
                .into(holder.starImage);
        holder.actorName.setText(model.getName());
        holder.counts.setText(""+model.getCount());
    }

    @Override
    public int getItemCount() {
        return starCounts.size();
    }

    public class StarCountHolder extends RecyclerView.ViewHolder {
        ImageView starImage;
        TextView actorName,counts;
        StarCount modelCount;
        public StarCountHolder(View itemView) {
            super(itemView);
            starImage = (ImageView) itemView.findViewById(R.id.starCountIv);
            actorName = (TextView) itemView.findViewById(R.id.acterName);
            counts = (TextView) itemView.findViewById(R.id.counts);
        }
    }
}

需要帮助解决这个问题，因为我被打了一天以上。分享想法以纠正我在代码中的错误并纠正我的错误。

Answer 1

public int selectedPosition  = -1   
public class StarCountHolder extends RecyclerView.ViewHolder {
    ImageView starImage;
    TextView actorName,counts;
    StarCount modelCount;
    public StarCountHolder(View itemView) {
        super(itemView);
        starImage = (ImageView) itemView.findViewById(R.id.starCountIv);
        actorName = (TextView) itemView.findViewById(R.id.acterName);
        counts = (TextView) itemView.findViewById(R.id.counts);
        itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                selectedPosition = getLayoutPosition());
                notifyDatasetChanged();
            }
        });
    }
}

现在您已完成所选项目位置，在您的活页夹中进行更改

@Override
public void onBindViewHolder(StarCountHolder holder, int position) {
    StarCount model = starCounts.get(position);
    Picasso.with(context)
            .load("http://"+model.getImagePath())
            .into(holder.starImage);
    holder.actorName.setText(model.getName());
    holder.counts.setText(""+model.getCount());
    if(selectedPosition == position){
       // do whatever you want to do to make it selected.
    }
}

现在要在您的活动中获取所选项目，您可以执行以下操作...

内部活动

StartCount startC = starCounts.get(adapter.selectedPosition);

希望有所帮助

Android Recycler View仅选择一个图像并在所选图像上显示刻度线

1 个答案: