zhibo/android-app/app/src/main/java/com/example/livestreaming/ChannelManagerAdapter.java

package com.example.livestreaming;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import java.util.ArrayList;
import java.util.List;

/**
 * 频道管理适配器
 * 用于显示我的频道和推荐频道
 */
public class ChannelManagerAdapter extends RecyclerView.Adapter<ChannelManagerAdapter.ViewHolder> {

    public interface OnChannelClickListener {
        void onChannelClick(ChannelItem item, int position);
        void onChannelDelete(ChannelItem item, int position);
        void onChannelAdd(ChannelItem item, int position);
    }

    private final List<ChannelItem> items = new ArrayList<>();
    private OnChannelClickListener listener;
    private boolean isEditMode = false;
    private boolean isRecommendMode = false; // 是否是推荐频道模式
    private int fixedCount = 4; // 前4个固定不能删除

    public void setOnChannelClickListener(OnChannelClickListener listener) {
        this.listener = listener;
    }

    public void setEditMode(boolean editMode) {
        this.isEditMode = editMode;
        notifyDataSetChanged();
    }

    public void setRecommendMode(boolean recommendMode) {
        this.isRecommendMode = recommendMode;
    }

    public void setFixedCount(int count) {
        this.fixedCount = count;
    }

    public void submitList(List<ChannelItem> newItems) {
        items.clear();
        if (newItems != null) {
            items.addAll(newItems);
        }
        notifyDataSetChanged();
    }

    public List<ChannelItem> getItems() {
        return new ArrayList<>(items);
    }

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

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        ChannelItem item = items.get(position);
        holder.bind(item, position);
    }

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

    class ViewHolder extends RecyclerView.ViewHolder {
        private final TextView channelName;
        private final ImageView fixedIcon;
        private final ImageView deleteIcon;
        private final ImageView addIcon;

        ViewHolder(@NonNull View itemView) {
            super(itemView);
            channelName = itemView.findViewById(R.id.channelName);
            fixedIcon = itemView.findViewById(R.id.fixedIcon);
            deleteIcon = itemView.findViewById(R.id.deleteIcon);
            addIcon = itemView.findViewById(R.id.addIcon);
        }

        void bind(ChannelItem item, int position) {
            channelName.setText(item.getName());

            // 重置所有图标状态
            fixedIcon.setVisibility(View.GONE);
            deleteIcon.setVisibility(View.GONE);
            addIcon.setVisibility(View.GONE);

            if (isRecommendMode) {
                // 推荐频道模式：显示添加图标
                addIcon.setVisibility(View.VISIBLE);
                itemView.setOnClickListener(v -> {
                    if (listener != null) {
                        listener.onChannelAdd(item, position);
                    }
                });
            } else {
                // 我的频道模式
                boolean isFixed = position < fixedCount;
                
                if (isEditMode) {
                    // 编辑模式
                    if (isFixed) {
                        fixedIcon.setVisibility(View.VISIBLE);
                    } else {
                        deleteIcon.setVisibility(View.VISIBLE);
                        deleteIcon.setOnClickListener(v -> {
                            if (listener != null) {
                                listener.onChannelDelete(item, position);
                            }
                        });
                    }
                }

                itemView.setOnClickListener(v -> {
                    if (listener != null) {
                        listener.onChannelClick(item, position);
                    }
                });
            }
        }
    }

    /**
     * 频道项数据类
     */
    public static class ChannelItem {
        private final String id;
        private final String name;
        private boolean isFixed;

        public ChannelItem(String id, String name) {
            this.id = id;
            this.name = name;
            this.isFixed = false;
        }

        public ChannelItem(String id, String name, boolean isFixed) {
            this.id = id;
            this.name = name;
            this.isFixed = isFixed;
        }

        public String getId() { return id; }
        public String getName() { return name; }
        public boolean isFixed() { return isFixed; }
        public void setFixed(boolean fixed) { this.isFixed = fixed; }
    }
}