我是通过数组来传递数据的，一旦提取的数据有几百条时，速度很慢。求大神们告知有没有更好的方法。
这是取数据的代码：
public List> CompanyInfo(ArrayList searchwhere) {
{
//Vector result=new Vector();
List> list = new ArrayList>();
arraylist.clear();
brraylist.clear();
arraylist.add("OrderCode");
brraylist.add((String) searchwhere.get(0));
arraylist.add("CompanyName");
brraylist.add((String) searchwhere.get(1));
crraylist=con.GetWebServre("CompanyInfo", arraylist, brraylist);
if(crraylist!=null)
{
for (int j = 0; j < crraylist.size(); j += 4) {
HashMap hashMap = new HashMap();
hashMap.put("OrderCode", crraylist.get(j));
hashMap.put("ProductName_JP", crraylist.get(j + 1));
hashMap.put("ProductName_CN", crraylist.get(j + 2));
hashMap.put("OrderNum", crraylist.get(j + 3));
list.add(hashMap);
}
}
return list;
}
这是链接web sercice 的代码
package com.example.login_0508;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import android.annotation.SuppressLint;
import com.example.login_0508.R.string;
public class HttpCon {
// public ArrayList<String> GetWebServre(String methodName, String string,
// String string2) {
// // TODO Auto-generated method stub
// return null;
// }
public ArrayList<String> GetWebServre(String methodName,ArrayList<String> Parameters,ArrayList<String>ParValues)
{
ArrayList<String> Values=new ArrayList<String>();
//String ServerUrl="http://10.0.2.2:4124/Service1.asmx";
String ServerUrl="http://10.0.2.2:2444/Service1.asmx";
//String soapAction="http://tempuri.org/LongUserId1";
String soapAction="http://tempuri.org/"+methodName;
String data="";
String soap = "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+ "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
+"<soap:Body />";
String tps,vps,ts;
String mreakString="";
mreakString="<"+methodName+" xmlns=\"http://tempuri.org/\">";
for ( int i = 0; i < Parameters.size(); i++) {
tps=Parameters.get(i).toString();
//设置该方法的参数为.net webService中的参数名称
vps=ParValues.get(i).toString();
ts="<"+tps+">"+vps+"</"+tps+">";
mreakString=mreakString+ts;
}
mreakString=mreakString+"</"+methodName+">";
/*
+"<HelloWorld xmlns=\"http://tempuri.org/\">"
+"<x>string11661</x>"
+"<SF1>string111</SF1>"
+ "</HelloWorld>"
*/
String soap2="</soap:Envelope>";
String requestData=soap+mreakString+soap2;
//System.out.println(requestData);
try{
URL url =new URL(ServerUrl);
HttpURLConnection con=(HttpURLConnection)url.openConnection();
byte[] bytes=requestData.getBytes("utf-8");
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setConnectTimeout(6000);// 设置超时时间
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "text/xml;charset=utf-8");
con.setRequestProperty("SOAPAction",soapAction);
con.setRequestProperty("Content-Length",""+bytes.length);
OutputStream outStream=con.getOutputStream();
outStream.write(bytes);
outStream.flush();
outStream.close();
InputStream inStream=con.getInputStream();
//data=parser(inStream);
//System.out.print("11");
Values= inputStreamtovaluelist(inStream,methodName);
//System.out.println(Values.size());
return Values;
}
catch(Exception e)
{
System.out.print("2221");
return null;
}
}
public ArrayList<String> inputStreamtovaluelist (InputStream in,String MonthsName) throws IOException {
StringBuffer out = new StringBuffer();
String s1="";
byte[] b = new byte[4096];
ArrayList<String> Values=new ArrayList<String>();
Values.clear();
for (int n; (n = in.read(b)) != -1;) {
if(s1=="")
{
s1=new String(b, 0, n);
}
else
{
s1=s1+new String (b, 0, n);
}
out.append(s1);
}
System.out.println(out);
String[] s13=s1.split("><");
String ifString=MonthsName+"Result";
String TS="";
String vs="";
Boolean getValueBoolean=false;
for(int i=0;i<s13.length;i++){
TS=s13[i];
System.out.println(TS);
int j,k,l;
j=TS.indexOf(ifString);
k=TS.lastIndexOf(ifString);
if (j>=0)
{
System.out.println(j);
if (getValueBoolean==false)
{
getValueBoolean=true;
}
else {
}
if ((j>=0)&&(k>j))
{
System.out.println("FFF"+TS.lastIndexOf("/"+ifString));
//System.out.println(TS);
l=ifString.length()+1;
vs=TS.substring(j+l,k-2);
//System.out.println("fff"+vs);
Values.add(vs);
System.out.println("退出"+vs);
getValueBoolean=false;
return Values;
}
}
if (TS.lastIndexOf("/"+ifString)>=0)
{
getValueBoolean=false;
return Values;
}
if ((getValueBoolean)&&(TS.lastIndexOf("/"+ifString)<0)&&(j<0))
{
k=TS.length();
//System.out.println(TS);
vs=TS.substring(7,k-8);
//System.out.println("f"+vs);
Values.add(vs);
}
}
return Values;
}
}
这是对listview 赋值代码
public void Infoshow()
{
ListView lv=(ListView)findViewById(R.id.listView1);
searchwhere=this.getIntent().getExtras().getStringArrayList("searchwhere");
list=new DB().CompanyInfo(searchwhere);
SimpleAdapter adapter = new SimpleAdapter(
this,
//this,
list,
R.layout.listviewitem,
new String[] { "OrderCode", "ProductName_CN", "ProductName_JP" ,"OrderNum"},
new int[] { R.id.txt_OrderCode, R.id.txt_ProductName_CN, R.id.txt_ProductName_JP , R.id.txt_OrderNum});
lv.setAdapter(adapter);
}
首先你要确定在哪个环节消耗的时间比较多，客户端，网络传输，服务端的响应，如果是客户端，你需要优化反序列化部分，如果是网络，试试传输前数据压缩下，如果是服务端，可能跟数据的准备有关系，看看如何把数据准备做得快些。