簡單的訊息置頂，簡單訊息置頂

簡單的訊息置頂，簡單訊息置頂

 

 

先看看

一個訊息列表，然後點擊item後會重新整理時間，點擊置頂後也會重新整理時間，置頂規則就是根據兩個欄位來排序

如果是置頂狀態，top為1，然後每次操作都會重新整理 time的時間，time是存的時間戳記，先看看實體類

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;    /**     * 置頂時間     **/    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;    }    /**     * 根據時間對比     * */    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;        }        /** 判斷是否置頂 */        int result = 0 - (top - chatBean.getTop());        if (result == 0) {            /** 按時間排序 */            result = 0 - compareToTime(time, chatBean.getTime());        }        return result;    }}

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然後需要在adapter裡面把一些輔助的方法寫進去，方便ui層調用，其實就是三個方法，一個作用是點擊時間重新整理 time欄位，一個是置頂方法 設定置頂狀態和重新整理時間，還有一個是添加資料的時候排序

然後就容易了，調介面返回資料

 

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("取消置頂");        }else{            holder.root.setBackgroundResource(R.color.white);            holder.top.setText("置頂");        }        holder.tv_title.setText("00"+bean.getId()+"號");        holder.tv_content.setText("大家好，我是00"+bean.getId()+"號,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);        }    }}

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這裡我給加了個控制符，topPosition，因為點擊時間和滑動刪除監聽不再一起，所以要記錄一下你點擊的操作，這樣也能防止你這個還沒置頂就點下一個了，導致索引錯亂

 

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