写一个listview的adapter-优快云博客

本文介绍了一个用于图书管理应用的自定义ArrayAdapter——bookAdapter，它实现了图书信息的列表显示和状态区分。同时，详细阐述了book类的设计，包括图书的状态、客户信息、订单日期等属性，以及图书的比较逻辑。

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package com.example.mgmt;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Collections;
import java.util.Date;
import java.util.List;

import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.Calendar;

public class bookAdapter extends ArrayAdapter<book>
{
private int resourceId;
public bookAdapter(Context context, int textViewResourceId,
   List<book> objects) {
  super(context, textViewResourceId, objects);
  resourceId = textViewResourceId;
  Collections.sort(objects);
  }

@Override
public View getView(int position, View convertView, ViewGroup parent)
{

  book mbook = getItem(position);
  View view = null;
  ViewHolder viewHolder = null;
  if (convertView == null)
  {
   view = LayoutInflater.from(getContext()).inflate(resourceId, null);
   viewHolder = new ViewHolder();
   viewHolder.orderId = (TextView)view.findViewById(R.id.order_Id);
   viewHolder.bookImage = (ImageView) view.findViewById(R.id.book_image);
   viewHolder.bookCustomer = (TextView)view.findViewById(R.id.book_customer);
   viewHolder.bookphone = (TextView)view.findViewById(R.id.book_phone);
   viewHolder.bookIsOpen = (TextView)view.findViewById(R.id.book_isopenned);
   viewHolder.bookId = (TextView)view.findViewById(R.id.inventory_Id);
   viewHolder.orderdate=(TextView)view.findViewById(R.id.inventory_orderdate);
   viewHolder.delaydays=(TextView)view.findViewById(R.id.inventory_days);

   view.setTag(viewHolder);
  }
  else
  {
   view = convertView;
   viewHolder = (ViewHolder) view.getTag();
  }
  if(mbook.getstatus()<=2)
  {
   viewHolder.bookImage.setImageResource(mbook.getImageId());
   viewHolder.orderId .setText(mbook.getTradeId());
   viewHolder.bookCustomer .setText(mbook.getCustomer());
   viewHolder.bookphone .setText(mbook.getphone());
   if(mbook.getstatus()==0) //找到，并closed
   {
    viewHolder.bookIsOpen.setText("");
   }
   else if(mbook.getstatus()==1)
   {
    viewHolder.bookIsOpen.setText("确认接收?");
    view.setBackgroundColor(Color.parseColor("#F7760F"));
   }
   else
   {
    viewHolder.bookIsOpen.setText("");
    view.setBackgroundColor(Color.parseColor("#dcdcdc"));
   }
   viewHolder.bookId.setVisibility(View.GONE);
   viewHolder.orderdate.setVisibility(View.GONE);
   viewHolder.delaydays.setVisibility(View.GONE);
  }
  else //
  {
   viewHolder.bookImage.setImageResource(R.drawable.unreturned);
   viewHolder.orderId .setVisibility(View.GONE);
   viewHolder.bookCustomer .setVisibility(View.GONE);
   viewHolder.bookphone .setVisibility(View.GONE);
   viewHolder.bookIsOpen.setVisibility(View.GONE);
   viewHolder.bookId.setText(mbook.getId());
   viewHolder.orderdate.setText(mbook.getdate());

   SimpleDateFormat sd=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
   long charge= 0;
   try {
    Date d1 = sd.parse(mbook.getdate().toString());
    Date curDate = new Date(System.currentTimeMillis());
    charge=(curDate.getTime()-d1.getTime())/(24*60*60*1000);
   } catch (ParseException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }

   viewHolder.delaydays.setText(String.valueOf(charge)+"天");
  }
  return view;
}

class ViewHolder {
  ImageView bookImage;
  TextView orderId;
  TextView bookCustomer;
  TextView bookphone;
  TextView bookIsOpen;
  TextView bookId;
  TextView orderdate;
  TextView delaydays;

  }
}

=======================

package com.example.mgmt;

public class book implements Comparable<book>{

private String id;
private int imageId;
private int status;
private String customer;
private String phone;
private String addr;
private String tradeId;
private String orderdate;

public book(String id, int status, String customer, String phone, String tradeId, String addr, String date)
{
  this.id = id;

  this.status = status;

  this.customer = customer;
  this.phone=phone;
  this.tradeId = tradeId;

  if(this.status ==0)
  {
   this.imageId = R.drawable.book_status_closed;
  }
  else if (this.status == 1)
  {
   this.imageId = R.drawable.book_status_open;
  }
  else
  {
   this.imageId = R.drawable.book_unknow;
  }

  this.addr=addr;
  this.orderdate = date;

}
public String getId() {
return id;
}
public String getAddr() {
return addr;
}
public int getImageId() {
return imageId;
}

public void setImageId(int imageid) {
this.imageId = imageid;
}

public void setAddr(String addr )
{
this.addr = addr;
}
public void setdate(String date )
{
this.orderdate = date;
}

public String getCustomer() {
return customer;
}

public String getphone() {
return phone;
}
public String getdate() {
return orderdate;
}

public int getstatus() {
return status;
}
public void setStatus(int status) {
   this.status = status;
  }

public String getTradeId() {
return tradeId;
}

    @Override
    public int compareTo(book o) {
        int i = this.getstatus() - o.getstatus();
        return i;
    }