项目里面的布局是这样的：一个Viewpager，Viewpager里面有三个Fragment，在第二个Fragment里面有一个ListView，使用了BaseAdapter来显示item。当时因为图方便，把获取数据源mData的方法直接写在了adapter的构造方法里面，数据源通过syncHttpClient向后台请求参数获取。

单击提示有错误：

CODE

package com.example.fiz.myapplication;

/**

Created by Fiz on 16/3/21.

和服务器进行通信

*/

import android.annotation.SuppressLint;

import android.app.LauncherActivity;

import android.os.Bundle;

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.OnItemClickListener;

import android.widget.ListView;

import android.widget.ArrayAdapter;

import android.app.Activity;

import android.widget.SimpleAdapter;

import com.example.fiz.myapplogin.DjangoRestClient;

import com.loopj.android.http.JsonHttpResponseHandler;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import java.util.ArrayList;

import java.util.HashMap;

import cz.msebera.android.httpclient.Header;

@SuppressLint("ValidFragment")

public class Home extends Fragment {

private String textString;

private static final String Tag = "MainActivity";

private ArrayList> arrayList = new ArrayList>();

public Home(String textString) {

this.textString = textString;

}

public static Home newInstance(String textString) {

Home mFragment = new Home(textString);

return mFragment;

}

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container,

Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.home_page, container, false);

final ListView listView = (ListView) view.findViewById(R.id.listView);

try {

getPublicTimeline();

} catch (JSONException e) {

e.printStackTrace();

}

final SimpleAdapter adapter = new SimpleAdapter(getActivity(), getData(), R.layout.home_page_text,

new String[]{"news_title", "news_from", "news_judge","news_time"}, new int[]{R.id.news_title, R.id.news_from, R.id.news_judge,R.id.news_time});

listView.setAdapter(adapter);

// adapter.notifyDataSetChanged();///

/**

*事件监听

*/

listView.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView> parent, View view, int position, long id) {

adapter.notifyDataSetChanged();

if ( ! arrayList.get(position).equals(null)){

Log.d(Tag, "THIS IS A JOKKE AA UN FUNC M ");

}else {

Log.d(Tag, "THIS IS A error are you undenstard AA UN FUNC M ");

}

}

});

return view;

}

/**

获取服务端数据

*/

void getPublicTimeline() throws JSONException {

DjangoRestClient.get("/demo/test/?format=json",

null, new JsonHttpResponseHandler() {

@Override

public void onSuccess(int statusCode, Header[] headers, JSONObject response) {

// If the response is JSONObject instead of expected JSONArray

System.out.println(response);

try {

JSONArray array = response.getJSONArray("data");

System.out.print("状态码" + statusCode);

} catch (Exception e) {

e.printStackTrace();

}

}

@Override

public void onSuccess(int statusCode, Header[] headers, JSONArray timeline) {

// Pull out the first event on the public timeline

//这是我的后台适应编码

// System.out.println(timeline);

try {

// JSONObject firstEvent = (JSONObject) timeline.get(0);

JSONArray secondEvent = (JSONArray) timeline;

// String tweetText = firstEvent.getString("title");

// Do something with the response

for (int j = 0; j < secondEvent.length(); j++) {

JSONObject firstEvent = (JSONObject) timeline.get(j);

HashMap tempHashMap = new HashMap();

//新闻标题

String title = firstEvent.getString("title");

//新闻时间

String description = firstEvent.getString("description");

//新闻来源

String link = firstEvent.getString("link");

//新闻序号

String linkmd5id = firstEvent.getString("linkmd5id");

tempHashMap.put("news_title", title);

tempHashMap.put("news_from", link);

tempHashMap.put("news_judge", linkmd5id);

tempHashMap.put("news_time", description);

arrayList.add(tempHashMap);

}

System.out.println(arrayList);

// System.out.println(tweetText);

} catch (JSONException e) {

//do something

}

}

});

}

/**

getData

*/

ArrayList> getData() {

return arrayList;

}

/**

捕获单击事件

*/

}

LOG

at android.widget.ListView.layoutChildren(ListView.java:1562)

at android.widget.AbsListView$CheckForTap.run(AbsListView.java:3261)

at android.os.Handler.handleCallback(Handler.java:739)

at android.os.Handler.dispatchMessage(Handler.java:95)

at android.os.Looper.loop(Looper.java:135)

at android.app.ActivityThread.main(ActivityThread.java:5221)

at java.lang.reflect.Method.invoke(Native Method)

at java.lang.reflect.Method.invoke(Method.java:372)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

04-12 00:42:38.120 29022-29022/com.example.fiz.myapplication I/Process: Sending signal. PID: 29022 SIG: 9