在RecyclerView

Question

现在我正在开发Android Studio的Android应用程序。 我在动态分配TextView时遇到了一些问题。 我正在使用RecyclerView来实现显示项目列表。 RecyclerView的每个ViewHolder项都应该具有TextView的ArrayList。 每个ViewHolder项中ArrayList的大小可以不同，因为 它从node.js服务器接收数据。所以我想在ViewHolder中分配TextView 通过动态分配。问题是当我在onBindViewHolder中创建TextView并将addView添加到LinearLayout时。它不起作用。但除了动态TextViews之外的其他视图分配工作。 如果你能帮助我，我会很高兴。

因为我从服务器中接收了JSON数组类型的数据， RecyclerView的适配器数据类型是ArrayList的ArrayList

这里是我的代码

public class PlayUpSitterListAdapter extends RecyclerView.Adapter<PlayUpSitterListAdapter.PlayUpListViewHolder> {
    private ArrayList<ArrayList<PlayupSitter>> playUpList = new ArrayList<>();
    ArrayList<PlayupSitter> playUp = new ArrayList<>();

    private Context ctx;

    public PlayUpSitterListAdapter(Context ctx, ArrayList<ArrayList<PlayupSitter>> playUpList) {
        this.ctx = ctx;

        for(int i=0; i < playUpList.size(); i++)
        {
            if(playUpList.get(i).get(0).play_paid == 0)
            {
                this.playUpList.add(playUpList.get(i));
            }
            else
            {
                this.playUpList.add(playUpList.get(i));
            }
        }
        /*
    for(int i =0; i<playUpList.size(); i++) {
        DynamicPlayUpTextView dynamicPlayUpTextView = new DynamicPlayUpTextView(ctx, "");
        holder.dynamictextViewArrayList.add(dynamicPlayUpTextView);
    }
    */
    }

    public void setPlayUpList(ArrayList<ArrayList<PlayupSitter>> playUpList) {

        for(int i=0; i < playUpList.size(); i++)
        {
            if(playUpList.get(i).get(0).play_paid ==0)
            {
                this.playUpList.add(playUpList.get(i));
            }
            else 
            {
                this.playUpList.add(playUpList.get(i));
            }
        }

        this.notifyDataSetChanged();
    }

    public ArrayList<PlayupSitter> getItem(int position) {
        return (playUpList != null && (0 <= position && position < playUpList.size())) ? playUpList.get(position) : null;
    }

    @Override
    public PlayUpListViewHolder onCreateViewHolder(ViewGroup sitter, int viewType) {
        View itemView = LayoutInflater.
                from(sitter.getContext()).
                inflate(R.layout.item_play_up_sitter, sitter, false);
        return new PlayUpListViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(PlayUpListViewHolder holder, int position) {
        ArrayList<PlayupSitter> playUp = playUpList.get(position);

        String temp;
        int vh_paytotal=0;

        for(int i=0; i< playUp.size(); i++) {

            temp = getmessage(playUp.get(i).play_date, playUp.get(i).sitter_rank, playUp.get(i).play_hour);
            DynamicPlayUpTextView dynamicPlayUpTextView = new DynamicPlayUpTextView(ctx, temp);
            holder.dynamictextViewArrayList.add(i, dynamicPlayUpTextView);

            holder.dynamicLL.addView(holder.dynamictextViewArrayList.get(i).buildDynamicPlayUpTextView());


            if(playUp.get(i).sitter_rank == "A")
            {
                vh_paytotal += 13000 * playUp.get(i).play_hour;
            }
            else if (playUp.get(i).sitter_rank == "B")
            {
                vh_paytotal += 10000 * playUp.get(i).play_hour;
            }
            else{
                vh_paytotal += 8000 * playUp.get(i).play_hour;
            }
        }
        if (playUpList.get(position).get(0).play_paid == 1) {

            holder.imgGrayBackground.setVisibility(View.VISIBLE);
            holder.imgGrayBackground.setClickable(false);
        } else {
            holder.imgGrayBackground.setVisibility(View.GONE);
            holder.imgGrayBackground.setClickable(true);
        }

        holder.pay_total.setText(vh_paytotal + "원");

    }

    private String getmessage(String play_date, String sitter_rank, int play_hour) {
        Toast.makeText(ctx, play_date + "      12000(" + sitter_rank +"등급) X"+play_hour + " = "+ play_hour * 12000+"원", Toast.LENGTH_SHORT ).show();
        return play_date + "      12000(" + sitter_rank +"등급) X"+play_hour + " = "+ play_hour * 12000+"원";
    }

    @Override
    public int getItemCount() {
        return (playUpList != null) ? playUpList.size() : 0;
    }

    public static class PlayUpListViewHolder extends RecyclerView.ViewHolder {

        ArrayList<DynamicPlayUpTextView> dynamictextViewArrayList = new ArrayList<>();

        ImageView imgGrayBackground;
        ImageView imgLine;
        LinearLayout dynamicLL;

        TextView txtPlayUp_TP;
        TextView pay_total;

        DynamicPlayUpTextView ddd;

        public  PlayUpListViewHolder(View itemView)  {
            super(itemView);

            dynamicLL = (LinearLayout) itemView.findViewById(R.id.layout_dynamic_play_up_sitter);
            imgGrayBackground = (ImageView) itemView.findViewById(R.id.grayBackground_playUp_Sitter);
            imgLine = (ImageView) itemView.findViewById(R.id.img_line_play_up_sitter);
            pay_total = (TextView) itemView.findViewById(R.id.txtPlayUp_TotalPay);
            txtPlayUp_TP = (TextView) itemView.findViewById(R.id.txtPlayUp_TP);
        }
    }
}

Answer 1

首先，您必须在添加ArrayList之前设置LayoutParams。 所以我们在下面添加：

dynamicPlayUpTextView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));

之间：

        DynamicPlayUpTextView dynamicPlayUpTextView = new DynamicPlayUpTextView(ctx, temp);
        holder.dynamictextViewArrayList.add(i, dynamicPlayUpTextView);

Answer 2

我没有设置我的TextColor。它实际上工作但我很困惑，因为它的默认颜色是白色，与背景颜色相同。这都怪我。关闭此问题