notifyDataSetChanged()刷新ListView（使用JSONArray绑定的Adapter）

1.fragment代码：

package com.ts.fragment;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Random;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import com.example.mywinxintest.R;

import com.ts.fragment.AutoListView;

import com.ts.fragment.AutoListView.OnLoadListener;

import com.ts.fragment.AutoListView.OnRefreshListener;

import com.ts.myst.JSONArrayAdapter;

import com.ts.util.HttpUtil;

import android.annotation.SuppressLint;

import android.graphics.Paint;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.support.v4.app.Fragment;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.ListView;

import android.widget.Spinner;

import android.widget.TextView;

public class SearchFragment extends Fragment implements OnRefreshListener,

OnLoadListener

{

Spinner areaSpinner;

TextView searchTextView;

ListView itemListView;

Map<String, String> countMap = new HashMap<String, String>();

String url1 = HttpUtil.BASE_URL+"asset_findAssetArea.action";

String url2 = HttpUtil.BASE_URL+"asset_findAssetSB.action";

String url3 = HttpUtil.BASE_URL+"asset_findAssetSBCount.action";

private AutoListView lstv;

private JSONArrayAdapter jsonArrayAdapter;

private JSONArray itemJsonArray = new JSONArray();

private String areaId;

private Handler handler = new Handler(){

@SuppressLint("NewApi")

public void handleMessage(Message msg) {

String result = (String) msg.obj;

JSONArray resultJsonArray = null;

try {

resultJsonArray = new JSONArray(result);

} catch (JSONException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

switch (msg.what) {

case AutoListView.REFRESH:

lstv.onRefreshComplete();

try {

for (int i = 0; i < itemJsonArray.length(); i++) {

itemJsonArray.remove(i);

}

for (int i = 0; i < resultJsonArray.length(); i++) {

itemJsonArray.put(resultJsonArray.get(i));

}

} catch (JSONException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

break;

case AutoListView.LOAD:

lstv.onLoadComplete();

for (int i = 0; i < resultJsonArray.length(); i++) {

try {

itemJsonArray.put(resultJsonArray.get(i));

} catch (JSONException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

break;

}

lstv.setResultSize(resultJsonArray.length());

jsonArrayAdapter.notifyDataSetChanged();

};

};

@Override

public View onCreateView(LayoutInflater inflater , ViewGroup container , Bundle savedInstanceState)

{

View v = inflater.inflate(R.layout.search_fragment, null) ;

lstv = (AutoListView) v.findViewById(R.id.lstv);

try{

itemJsonArray = new JSONArray("[]");

jsonArrayAdapter = new JSONArrayAdapter(getActivity(), itemJsonArray, "assetCode_assetName_assetSyr", false, "3");

// itemListView.setAdapter(adapter2);

lstv.setAdapter(jsonArrayAdapter);

lstv.setOnRefreshListener(this);

lstv.setOnLoadListener(this);

initData(areaId);

@Override

public void onNothingSelected(AdapterView<?> parent) {

// TODO Auto-generated method stub

}

});

}

catch(Exception e){

e.printStackTrace();

}

return v ;

}

private void initData(String areaId) {

loadData(AutoListView.REFRESH,areaId);

}

private void loadData(final int what, final String areaId) {

new Thread(new Runnable() {

@Override

public void run() {

// TODO Auto-generated method stub

try {

Thread.sleep(700);

} catch (InterruptedException e) {

e.printStackTrace();

}

Message msg = handler.obtainMessage();

msg.what = what;

try {

msg.obj = <span style="font-family: Arial, Helvetica, sans-serif;">getData(areaId) <span style="font-family: Arial, Helvetica, sans-serif;">;

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

handler.sendMessage(msg);

}

}).start();

}

@Override

public void onLoad() {

// TODO Auto-generated method stub

loadData(AutoListView.LOAD,areaId);

}

@Override

public void onRefresh() {

// TODO Auto-generated method stub

loadData(AutoListView.REFRESH,areaId);

}

// 测试数据

public String getData(String areaId) {

String result = null;

try {

result = HttpUtil.postRequest(url2, countMap);//通过服务器获取数据

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return result;

}

}