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java - 通过使用带有.get（位置）的回收器视图适配器，我无法从回收器视图java中的edittext获取文本

问题描述

我是java编程新手。我正在尝试创建一个聊天应用程序，现在我想获取特定RecyclerView布局中的文本EditText。我使用下面的代码作为回收器视图适配器代码。但它在进入第mImagenames.get(position) 60 行时显示错误。我需要mImageNames.get(position)正常工作。任何帮助都深表感谢。提前致谢

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder>
{
    private List<item_type> mImageNames;
    private Context mContext;


    public RecyclerViewAdapter(List<item_type> mImageNames, Context mContext) {
        this.mImageNames = mImageNames;
        this.mContext = mContext;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_list_item,parent,false);
        ViewHolder holder =new ViewHolder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, final int position) {
        item_type type =mImageNames.get(position);
        if("MSG_TYPE_GROUP".equals(type.getType())){
            holder.imageNames.setText(type.getName());

            holder.last_messages.setText("that trick won");

        }
        if("MSG_TYPE_PERSONAL".equals(type.getType())){
            holder.imageName.setText(type.getName());
            holder.last_message.setText("that was a nice trick");
        }



        holder.parentLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent =new Intent(mContext,ChatActivity.class);
                intent.putExtra("usernames",mImageNames.get(position));
                mContext.startActivity(intent);
            }
        });

        holder.grouplayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent =new Intent(mContext,chat_group.class);
                mContext.startActivity(intent);
            }
        });


    }

    @Override
    public int getItemCount() {

        return mImageNames.size();

    }

    public class ViewHolder extends RecyclerView.ViewHolder{
         CircleImageView image,imagess;
         TextView imageName,last_message,imageNames,last_messages;
         RelativeLayout parentLayout,grouplayout;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            image=itemView.findViewById(R.id.images);
            imageName=itemView.findViewById(R.id.imageName);
            last_message=itemView.findViewById(R.id.last_mess);
            parentLayout=itemView.findViewById(R.id.parent_layout);
            imagess=itemView.findViewById(R.id.imagess);
            imageNames=itemView.findViewById(R.id.imageNames);
            last_messages=itemView.findViewById(R.id.last_messs);
            grouplayout=itemView.findViewById(R.id.group);
        }
    }
}

标签： javaandroidandroid-recyclerview

解决方案

查看您的代码后，很明显您正试图通过意图传递对象

 intent.putExtra("usernames",mImageNames.get(position).getName());

如果您想传递名称，请尝试此操作。如果你想将对象传递给下一个活动，你可以使该类 parcelable 。

查看此https://stackoverflow.com/a/7181792/3995126了解更多详情

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