java - ListView 以编程方式添加列

Question

我正在创建一个投票应用程序，其选民数量未知。当我知道选民数量时，我想向 ListView 添加列。这是一个示例图像:

有没有办法动态添加列到ListView？我在过去的 2 个小时里用谷歌搜索了这个问题，似乎找不到任何好的解决方案。

我已经可以进行垂直和水平滚动，并且可以在顶部添加选民姓名，但我无法动态添加投票点，因为它们位于 ListView 内。

这是我尝试过的:

1. 膨胀ListView的布局以添加项目(由于某种原因，如果我添加例如“0”，它会向第一行添加“0000”，向其余行添加“00”)
2. 使用RecyclerView(它比ListView效果更好，它正确地添加了“0”，但由于某种原因宽度不是它应该的宽度

Answer 1

我终于成功创建了这个，所以我想我会在这里分享它。我使用 RecyclerView 来完成此操作，但如果有人知道如何使用 ListView 执行此操作，我会很乐意使用它。通过在 ListView 中使用 View 持有者可能可以做同样的事情吗？如果有效的话我会发布我的结果。

// Adapter for creating the RecyclerView
public class ResultsAdapter extends RecyclerView.Adapter<ResultsAdapter.MyViewHolder> {

    private Context context;
    private List<ListItem> itemsList;
    private ArrayList<Profile> profiles;

    public class MyViewHolder extends RecyclerView.ViewHolder {
        public View view;
        public TextView name, extra, votes;
        public TextView[] votePoints;

        public MyViewHolder(View view) {
            super(view);
            this.view = view;
            name = view.findViewById(R.id.resultsName);
            extra = view.findViewById(R.id.resultsBonus);
            votes = view.findViewById(R.id.resultsVotePoints);
            votePoints = new TextView[profiles.size()];
        }
    }


    public ResultsAdapter(Context context, List<ListItem> itemsList, ArrayList<Profile> profiles) {
        this.itemsList = itemsList;
        this.profiles = profiles;
        this.context = context;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.result_show_votes_item, parent, false);

        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        ListItem item = itemsList.get(position);
        holder.name.setText(item.getName());
        holder.extra.setText(String.valueOf(item.getTotal()));
        holder.votes.setText(String.valueOf(item.getVotePoints()));

        // Add vote points to layout
        LinearLayout layout = holder.view.findViewById(R.id.resultItemLayout);
        LayoutInflater inflater = LayoutInflater.from(context);
        for (int i = 0; i < profiles.size(); i++) {
            ListItem voteItem = itemsList.get(position);
            Profile profile = profiles.get(i);
            int voteAmount = profile.votePointsOfItem(voteItem);

            // Use "layout" and "false" as parameters to get the width and height from result_voter_points
            TextView vote = (TextView) inflater.inflate(R.layout.result_voter_points, layout, false);
            vote.setText(voteAmount == 0 ? "" : String.valueOf(voteAmount));
            layout.addView(vote);

            holder.votePoints[i] = vote;
        }
    }

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

// Add profile names to topics
LinearLayout topicLayout = findViewById(R.id.topicLayout);
for (Profile p : selectedProfiles) {
    TextView name = (TextView) getLayoutInflater().inflate(R.layout.result_voter_name, topicLayout, false);
    name.setText(p.getName());
    topicLayout.addView(name);
}

RecyclerView recyclerView = findViewById(R.id.recycler_view);

ResultsAdapter adapter = new ResultsAdapter(this, selectedList.getItems(), selectedProfiles);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(adapter);