Question

我在聊天应用程序中使用以下适配器进行recyclerview但在滚动时我自动定位已更改。我使用了getItemViewType（）我认为这会带来问题。

public class MessageAdapter extends RecyclerView.Adapter<MessageAdapter.MyViewHolder> {

Context context;
List<Message> messageList;
private int SELF = 7861212;

public MessageAdapter(Context context, List<Message> messages) {
    messageList = messages;
    this.context = context;
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View mview = null;

    if (viewType == SELF) {
        mview = LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_user2_item, parent, false);
    } else {
        mview = LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_user1_item, parent, false);

    }

    return new MyViewHolder(mview);
}

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {

    Message message = messageList.get(position);

    holder.message_text.setText(message.getText());
    holder.chat_company_reply_author.setText(message.getName());


    if (message.isfile()) {
        if (message.getMessageStatus() != null && message.getMessageStatus() == Status.DELIVERED) {
            holder.rl_file.setVisibility(View.VISIBLE);
            holder.progress_bar1.setVisibility(View.GONE);
            try {
                holder.user_reply_status.setImageDrawable(context.getResources().getDrawable(R.drawable.ic_double_tick));
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
        if (message.getFiletype() != null) {
            holder.rl_file.setVisibility(View.VISIBLE);
        }
    } else {
        if (message.getMessageStatus() != null && message.getMessageStatus() == Status.DELIVERED) {
            try {
                holder.user_reply_status.setImageDrawable(context.getResources().getDrawable(R.drawable.ic_double_tick));
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }

    try {
        Picasso.with(context).
                load(Constant.BASE_URL_FORDOWNLOD + "" + message.getFileurl()).
                placeholder(R.mipmap.ic_launcher).
                into(holder.img_chat);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public int getItemViewType(int position) {
    Message message = messageList.get(position);
    if (message.getUserType() == UserType.SELF) {
        return SELF;
    }
    return position;
}

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

public void add(Message message, RecyclerView recyclerView) {
    messageList.add(message);
    notifyItemInserted(messageList.size() - 1);
}

public void mesage_status(int issent, int position) {
    Message message = messageList.get(position);
    if (issent == 1) {
        message.setMessageStatus(Status.SENT);
    }
    if (issent == 2) {
        message.setMessageStatus(Status.DELIVERED);
    }
    notifyItemChanged(position);
}

public class MyViewHolder extends RecyclerView.ViewHolder {

    public TextView chat_company_reply_author, message_text, time_text;
    public ImageView img_chat, user_reply_status;
    public RelativeLayout rl_file;
    public ProgressBar progress_bar1;

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

        img_chat = (ImageView) itemView.findViewById(R.id.img_chat);
        user_reply_status = (ImageView) itemView.findViewById(R.id.user_reply_status);
        chat_company_reply_author = (TextView) itemView.findViewById(R.id.chat_company_reply_author);
        message_text = (TextView) itemView.findViewById(R.id.message_text);
        time_text = (TextView) itemView.findViewById(R.id.time_text);
        rl_file = (RelativeLayout) itemView.findViewById(R.id.rl_file);
        progress_bar1 = (ProgressBar) itemView.findViewById(R.id.progress_bar1);
    }

    public void setvalue(Message message, int position) {

        message_text.setText(message.getText());
        chat_company_reply_author.setText(message.getName());


        if (message.isfile()) {
            if (message.getMessageStatus() != null && message.getMessageStatus() == Status.DELIVERED) {
                rl_file.setVisibility(View.VISIBLE);
                progress_bar1.setVisibility(View.GONE);
                try {
                    user_reply_status.setImageDrawable(context.getResources().getDrawable(R.drawable.ic_double_tick));
                } catch (Exception e) {
                    e.printStackTrace();
                }

            }
            if (message.getFiletype() != null) {
                rl_file.setVisibility(View.VISIBLE);

            }
        } else {
            if (message.getMessageStatus() != null && message.getMessageStatus() == Status.DELIVERED) {
                try {
                    user_reply_status.setImageDrawable(context.getResources().getDrawable(R.drawable.ic_double_tick));
                } catch (Exception e) {
                    e.printStackTrace();
                }

            }
        }

        try {
            Picasso.with(context).
                    load(Constant.BASE_URL_FORDOWNLOD + "" + message.getFileurl()).
                    placeholder(R.mipmap.ic_launcher).
                    into(img_chat);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}}

chat image

Answer 1

我遇到的问题是当我使用holder.rl_file.setVisibility(View.VISIBLE);时，holder.rl_file.setVisibility(View.GONE);处于错误状态。

在Android中滚动时更改RecyclerView中项目的视图位置

1 个答案: