Android留言功能

留言功能主要代码：

package com.example.secondhand;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.HashMap;
import java.util.LinkedList;

/**
* 评论的适配器
* @author autumn_leaf
*/
public class ReviewAdapter extends BaseAdapter {

private Context context;
private LayoutInflater layoutInflater;

private LinkedList<Review> reviews = new LinkedList<>();
HashMap<Integer,View> location = new HashMap<>();


public ReviewAdapter(Context context) {
this.context = context;
layoutInflater = LayoutInflater.from(context);
}

public void setData(LinkedList<Review> reviews) {
this.reviews = reviews;
notifyDataSetChanged();
}

@Override
public int getCount() {
return reviews.size();
}

@Override
public Object getItem(int position) {
return reviews.get(position);
}

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

/**
* 获取视图
* @param position 位置
* @param convertView 当前的视图
* return convertView
*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if(location.get(position) == null) {
convertView = layoutInflater.inflate(R.layout.layout_commodity_review,null);
Review review = (Review) getItem(position);
holder = new ViewHolder(convertView,review);
location.put(position,convertView);
convertView.setTag(holder);
}else {
convertView = location.get(position);
holder = (ViewHolder) convertView.getTag();
}
return convertView;
}

/**
* 静态ViewHolder类
*/
static class ViewHolder {

TextView tvStuId,tvTime,tvContent;

public ViewHolder(View itemView, Review review) {
tvStuId = itemView.findViewById(R.id.tv_number);
tvTime = itemView.findViewById(R.id.tv_current_time);
tvContent = itemView.findViewById(R.id.tv_comment);
tvStuId.setText(review.get_id());
tvTime.setText(review.getSetCurrentTime());
tvContent.setText(review.getGoodsLiuyan());
}
}
}