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
  */

1. 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
  */

1. 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

private String textString; private Handler mHandler;

private static final String Tag = "MainActivity"; private ArrayList> arrayList = new ArrayList>();

public Home2(String textString) { this.textString = textString; } public static Home2 newInstance(String textString) { Home2 mFragment = new Home2(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); 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 try { JSONArray secondEvent = (JSONArray) timeline;

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); } 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); System.out.println(arrayList);

} catch (JSONException e) { //do something } } });

/** *事件监听 */ listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView parent, View view, int position, long id) { 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; }

/**