我正在做一个TCP套接字连接的项目。 从服务器接收json数据并将其显示在列表视图中。 服务器每1秒连续发送数据 我收到索引超出绑定异常的错误无效的索引4大小是4。 我的代码如下。 我认为问题在于用户u = list.get（position）;和runonUIthread。
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Random;
import java.util.Timer;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.text.format.Time;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity{
String str;
ArrayList<User> list = new ArrayList<User>();;
ArrayAdapter<User> adb;
ListView lv;
SQLiteAdapter sqladapter = new SQLiteAdapter(MainActivity.this);;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
lv = (ListView) findViewById(R.id.listView1);
new Thread(new Client()).start();
Timer tm = new Timer();
}
public class Client implements Runnable{
@Override
public void run() {
try {
Socket s = new Socket("My IP",My Port);
while(s.isConnected()){
BufferedReader in = new BufferedReader(new InputStreamReader(
s.getInputStream()));
int nRead;
char[] data = new char[1024+512];
String decoded= "";
Date date = new Date();
long time = date.getTime();
while ((nRead = in.read(data, 0, data.length)) != -1) {
decoded += new String(data,0,nRead);
if(decoded.contains("{") && decoded.contains("}")){
str = decoded.substring(decoded.indexOf('{'),decoded.indexOf('}')+1);
decoded = decoded.substring(decoded.indexOf('}')+1);
if(!decoded.contains("{"))
decoded = "";
try {
JSONArray results = new JSONArray("["+str+"]");
for (int i = 0; i < results.length(); i++) {
JSONObject jsonObject;
jsonObject = results.getJSONObject(i);
String symbol = jsonObject.getString("Symbol");
double high = Double.parseDouble(jsonObject.getString("High"));
double low = Double.parseDouble(jsonObject.getString("Low"));
sqladapter = sqladapter.opentowrite();
boolean insertOrUpdate = sqladapter.checkDB(symbol);
if(insertOrUpdate== false){
User user = new User(jsonObject.getString("Symbol"),
jsonObject.getString("AskPrice"),
jsonObject.getString("BidPrice"),
jsonObject.getString("Open"),
jsonObject.getString("High"),
jsonObject.getString("Low"),
jsonObject.getString("Close"),
jsonObject.getString("PerChange"),
jsonObject.getString("NetChange"),
jsonObject.getString("Volume"));
sqladapter.insert(user);
list.add(user);
}
else{
int j;
for(j = 0; j<list.size();j++){
User obj = list.get(j);
if(obj.getSymbol().equalsIgnoreCase(symbol)){
list.remove(obj);
System.out.println("REMOVIED "+obj.getSymbol());
break;
}
}
User user2 = new User(jsonObject.getString("Symbol"),
jsonObject.getString("AskPrice"),
jsonObject.getString("BidPrice"),
jsonObject.getString("Open"),
high+"",low+"",
jsonObject.getString("Close"),
jsonObject.getString("PerChange"),
jsonObject.getString("NetChange"),
jsonObject.getString("Volume"));
list.add(j,user2);
System.out.println("ADDED :"+j);
}
updateList();
runOnUiThread(new Runnable() {
@Override
public void run() {
lv.setAdapter(adb);
adb.notifyDataSetChanged();
lv.invalidateViews();
lv.getCount();
}
});
}
} catch (JSONException e) {
e.printStackTrace();
}
}
System.out.println(date.getTime()- time);
}
}
s.close();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public void updateList() {
adb = new ArrayAdapter<User>(MainActivity.this, R.layout.rssitemview,list){
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view=convertView;
if(null == view) {
LayoutInflater vi = (LayoutInflater)MainActivity.this.
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = vi.inflate(R.layout.rssitemview, null);
}
User u = list.get(position);
if(null != u)
{
TextView title = (TextView)view.findViewById(R.id.symbol);
TextView persend = (TextView)view.findViewById(R.id.persent);
TextView ltp = (TextView)view.findViewById(R.id.ltp);
TextView open = (TextView)view.findViewById(R.id.open);
TextView high = (TextView)view.findViewById(R.id.high);
TextView low = (TextView)view.findViewById(R.id.low);
TextView close = (TextView)view.findViewById(R.id.close);
title.setText(u.getSymbol().substring(0, 5));
ltp.setText(u.getPerChange().substring(0, 4));
persend.setText(u.getVolume().substring(0, 4));
open.setText(u.getOpen().substring(0, 4));
high.setText(u.getHigh().substring(0, 4));
low.setText(u.getLow().substring(0, 4));
close.setText(u.getClose().substring(0, 4));
}
return view;
}
};
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
请帮助..