Question

我想在适配器中设置多行，但这不起作用，我不知道为什么

聊天适配器

public class ChatAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

        Context context;
        List<ChatModel> chatModels;

        public ChatAdapter(Context context, List<ChatModel> chatModels) {
            this.context = context;
            this.chatModels = chatModels;
        }

        @NonNull
        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
            ChatModel chatModel = chatModels.get(i);
            if (chatModel.me.equals("yes")) {
                return new Black_Message(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.row_black, viewGroup, false));
            } else if (chatModel.me.equals("no")) {
                return new Yellow_Message(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.row_yellow, viewGroup, false));
            }
            return null;
        }

        @Override
        public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
            ChatModel chatModel = chatModels.get(i);
            if (chatModel.me.equals("yes")) {
                Black_Message black_message = (Black_Message) viewHolder;
                black_message.text_title.setText(chatModel.question);
            } else if (chatModel.me.equals("no")) {
                Yellow_Message yellow_message = (Yellow_Message) viewHolder;
                yellow_message.text_title.setText(chatModel.answers);
            }
        }

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

        class Black_Message extends RecyclerView.ViewHolder {
            @BindView(R.id.relative_layout)
            RelativeLayout relative_layout;
            @BindView(R.id.text_title)
            TextViewFont text_title;

            public Black_Message(@NonNull View itemView) {
                super(itemView);
                ButterKnife.bind(this, itemView);
            }
        }

        class Yellow_Message extends RecyclerView.ViewHolder {
            @BindView(R.id.relative_layout)
            RelativeLayout relative_layout;
            @BindView(R.id.text_title)
            TextViewFont text_title;

            public Yellow_Message(@NonNull View itemView) {
                super(itemView);
                ButterKnife.bind(this, itemView);
            }
        }

    }

我希望你告诉我哪里出错了.......................................... ................................................... ...................................................

Answer 1

我找到了解决办法

public class ChatAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    Context context;
    List<ChatModel> chatModels;

    public ChatAdapter(Context context, List<ChatModel> chatModels) {
        this.context = context;
        this.chatModels = chatModels;
    }

    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        if (i == 1) {
            return new Black_Message(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.row_black, viewGroup, false));
        } else if (i == 2) {
            return new Yellow_Message(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.row_yellow, viewGroup, false));
        }
        return null;
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
        ChatModel chatModel = chatModels.get(i);
        if (chatModel.me.equals("yes")) {
            Black_Message black_message = (Black_Message) viewHolder;
            black_message.text_title.setText(chatModel.question);
        } else if (chatModel.me.equals("no")) {
            Yellow_Message yellow_message = (Yellow_Message) viewHolder;
            yellow_message.text_title.setText(chatModel.answers);
        }
    }

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

    @Override
    public int getItemViewType(int position) {
        ChatModel chatModel = chatModels.get(position);
        if (chatModel.me.equals("yes")) {
            return 1;
        } else if (chatModel.me.equals("no")) {
            return 2;
        }else {
            return super.getItemViewType(position);
        }
    }

    class Black_Message extends RecyclerView.ViewHolder {
        @BindView(R.id.relative_layout)
        RelativeLayout relative_layout;
        @BindView(R.id.text_title)
        TextViewFont text_title;

        public Black_Message(@NonNull View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        }
    }

    class Yellow_Message extends RecyclerView.ViewHolder {
        @BindView(R.id.relative_layout)
        RelativeLayout relative_layout;
        @BindView(R.id.text_title)
        TextViewFont text_title;

        public Yellow_Message(@NonNull View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        }
    }

}

为什么我不能在Recyclerview适配器中设置多行

1 个答案: