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简单的消息置顶

2018年03月26日  | 移动技术网IT编程  | 我要评论

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先看看效果图

一个消息列表，然后点击item后会刷新时间，点击置顶后也会刷新时间，置顶规则就是根据两个字段来排序

如果是置顶状态，top为1，然后每次操作都会刷新 time的时间，time是存的时间戳，先看看实体类

package com.fragmentapp.home.bean;

import android.support.annotation.NonNull;
import java.util.Calendar;

/**
 * Created by liuzhen on 2018/3/22.
 */

public class ChatBean implements Comparable<ChatBean> {

    private int id;

    private int top;

    /**
     * 置顶时间
     **/
    public long time;

    public int getTop() {
        return top;
    }

    public void setTop(int top) {
        this.top = top;
    }

    public long getTime() {
        return time;
    }

    public void setTime(long time) {
        this.time = time;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    /**
     * 根据时间对比
     * */
    public int compareToTime(long lhs, long rhs) {
        Calendar cLhs = Calendar.getInstance();
        Calendar cRhs = Calendar.getInstance();
        cLhs.setTimeInMillis(lhs);
        cRhs.setTimeInMillis(rhs);
        return cLhs.compareTo(cRhs);
    }

    @Override
    public int compareTo(@NonNull ChatBean chatBean) {
        if (chatBean == null) {
            return -1;
        }
        /** 判断是否置顶 */
        int result = 0 - (top - chatBean.getTop());
        if (result == 0) {
            /** 按时间排序 */
            result = 0 - compareToTime(time, chatBean.getTime());
        }
        return result;
    }
}
View Code

然后需要在adapter里面把一些辅助的方法写进去，方便ui层调用，其实就是三个方法，一个作用是点击时间刷新 time字段，一个是置顶方法 设置置顶状态和刷新时间，还有一个是添加数据的时候排序

然后就容易了，调接口返回数据

 

package com.fragmentapp.home.adapter;

import android.view.View;
import android.widget.TextView;
import com.chad.library.adapter.base.BaseViewHolder;
import com.fragmentapp.R;
import com.fragmentapp.base.ArrayRecyclerAdapter;
import com.fragmentapp.home.bean.ChatBean;
import com.fragmentapp.view.remove.SwipeItemLayout;

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

/**
 * Created by liuzhen on 2017/11/20.
 */

public class HomeAdapter extends ArrayRecyclerAdapter<ChatBean, HomeAdapter.ViewHolder> {

    private int topPosition = -1;

    public HomeAdapter(int layoutResId) {
        super(layoutResId);
    }

    @Override
    protected void convert(final ViewHolder holder, final ChatBean bean) {
        if (bean.getTop() == 1){
            holder.root.setBackgroundResource(R.color.color_EEEEEE);
            holder.top.setText("取消置顶");
        }else{
            holder.root.setBackgroundResource(R.color.white);
            holder.top.setText("置顶");
        }
        holder.tv_title.setText("00"+bean.getId()+"号");
        holder.tv_content.setText("大家好，我是00"+bean.getId()+"号,我的top是"+bean.getTop());
        holder.tv_time.setText(bean.getTime()+"");
        //        GlideApp.with(AndroidApplication.getInstance().getApplicationContext())
//                .load(item.path)
//                .skipMemoryCache(true)
//                .diskCacheStrategy(DiskCacheStrategy.NONE)
//                .centerCrop()
//                .transform(new RoundedCorners(10))
//                .into(imageView);
    }

    @Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {
        super.onBindViewHolder(holder, position);

        final ChatBean bean = getItem(position);

        holder.item_layout.setSwipeAble(true);
        holder.item_layout.setDelegate(new SwipeItemLayout.SwipeItemLayoutDelegate() {
            @Override
            public void onSwipeItemLayoutOpened(SwipeItemLayout swipeItemLayout) {


            }

            @Override
            public void onSwipeItemLayoutClosed(SwipeItemLayout swipeItemLayout) {
                if (topPosition >= 0) {
                    if (bean.getTop() == 0){
                        bean.setTime(System.currentTimeMillis());
                        setTop(position,1);
                    }else{
                        setTop(position,0);
                    }
                    topPosition = -1;
                }
            }

            @Override
            public void onSwipeItemLayoutStartOpen(SwipeItemLayout swipeItemLayout) {

            }
        });

        holder.del.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (topPosition == -1) {
                    holder.item_layout.closeWithAnim();
                }
            }
        });
        holder.top.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (topPosition == -1) {
                    holder.item_layout.closeWithAnim();
                    topPosition = position;
                }
            }
        });
    }

    private void setTop(int position,int top){
        mData.get(position).setTop(top);
        Collections.sort(mData);
        notifyDataSetChanged();
    }

    public void click(int position){
        mData.get(position).setTime(System.currentTimeMillis());
        Collections.sort(mData);
        notifyDataSetChanged();
    }

    public List<ChatBean> sortList(List<ChatBean> list){
        Collections.sort(list);
        return list;
    }

    static class ViewHolder extends BaseViewHolder
    {

        TextView tv_title,tv_content,tv_time,tv_home,tv_read,del,top;
        SwipeItemLayout item_layout;
        View root;

        public ViewHolder(View view)
        {
            super(view);
            tv_title = getView(R.id.tv_title);
            tv_content = getView(R.id.tv_content);
            tv_time = getView(R.id.tv_time);
            tv_home = getView(R.id.tv_home);
            tv_read = getView(R.id.tv_read);

            item_layout = getView(R.id.item_layout);

            root = getView(R.id.root);

            del = getView(R.id.item_contact_delete);
            top = getView(R.id.item_contact_top);

        }
    }

}
View Code

这里我给加了个控制符，topPosition，因为点击时间和滑动删除监听不再一起，所以要记录一下你点击的操作，这样也能防止你这个还没置顶就点下一个了，导致索引错乱

 

GitHub：https://github.com/1024477951/FragmentApp

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