关于listView setAdapter方法，无语纠结中，真心求助。。

Question

微博的项目， setAdapter方法老报空指针错误，应该是数据有问题，解决不了了。
public void refresh(Object... param) {
Log.d("ref", (String)param[0]);
if(((String)param[0]).equals("REF_WEIBO"))
        { List<WeiBoInfo> friends = (List<WeiBoInfo>)param[1];  这个数据是用  handler异步消息处理message.object传递的     System.out.println(friends.size());    ---这里打印出来20条记录
     System.out.println(friends.toArray()); ---这里怎么只有一条数据打印出来呢？？
  
System.out.println("加载数据2");
            WeiBoAdapater adapter = new WeiBoAdapater(this,friends);
            Msglist.setAdapter(adapter);
        ｝下面是logcat结果
------------------------------------------------------------------------------
没赋值给message.obj之前打印的数据
07-12 09:23:17.324: INFO/System.out(574): [Ljava.lang.Object;@43e35dd8
07-12 09:23:17.363: INFO/System.out(574): [Ljava.lang.Object;@43e76500
07-12 09:23:17.363: INFO/System.out(574): [Ljava.lang.Object;@43e76818
07-12 09:23:17.372: INFO/System.out(574): [Ljava.lang.Object;@43edf730
07-12 09:23:17.372: INFO/System.out(574): [Ljava.lang.Object;@43edfa50
07-12 09:23:17.372: INFO/System.out(574): [Ljava.lang.Object;@43ec3b08
07-12 09:23:17.383: INFO/System.out(574): [Ljava.lang.Object;@43ec3e30
07-12 09:23:17.383: INFO/System.out(574): [Ljava.lang.Object;@43ec4158
07-12 09:23:17.412: INFO/System.out(574): [Ljava.lang.Object;@43ec46b0
07-12 09:23:17.423: INFO/System.out(574): [Ljava.lang.Object;@43ec49e0
07-12 09:23:17.423: INFO/System.out(574): [Ljava.lang.Object;@43ec4d18
07-12 09:23:17.443: INFO/System.out(574): [Ljava.lang.Object;@43f19c90
07-12 09:23:17.453: INFO/System.out(574): [Ljava.lang.Object;@43f1a030
07-12 09:23:17.453: INFO/System.out(574): [Ljava.lang.Object;@43f1a370
07-12 09:23:17.473: INFO/System.out(574): [Ljava.lang.Object;@43e6ddc8
07-12 09:23:17.473: INFO/System.out(574): [Ljava.lang.Object;@43e6e110
07-12 09:23:17.493: INFO/System.out(574): [Ljava.lang.Object;@43e6e460
07-12 09:23:17.513: INFO/System.out(574): [Ljava.lang.Object;@43e6e7b0
07-12 09:23:17.523: INFO/System.out(574): [Ljava.lang.Object;@43f10b58
07-12 09:23:17.553: INFO/System.out(574): [Ljava.lang.Object;@43f10eb0
传递后，打印出来显示有20条
07-12 09:23:17.553: INFO/System.out(574): 20
再打印只有一条记录，哎。烦躁啊
07-12 09:23:17.553: INFO/System.out(574): [Ljava.lang.Object;@43f112f0

Answer 1

System.out.println(friends.size());你看看里面的值，是不是有空值哦，friends.toArray()会过滤空值的。lz你先debug下。

Answer 2

 ---谢谢下面就是用message.obj传递之前的值哦，一共20条记录嘛，应该没有空值吧？55507-12 09:23:17.324: INFO/System.out(574): [Ljava.lang.Object;@43e35dd8
07-12 09:23:17.363: INFO/System.out(574): [Ljava.lang.Object;@43e76500
07-12 09:23:17.363: INFO/System.out(574): [Ljava.lang.Object;@43e76818
07-12 09:23:17.372: INFO/System.out(574): [Ljava.lang.Object;@43edf730
07-12 09:23:17.372: INFO/System.out(574): [Ljava.lang.Object;@43edfa50
07-12 09:23:17.372: INFO/System.out(574): [Ljava.lang.Object;@43ec3b08
07-12 09:23:17.383: INFO/System.out(574): [Ljava.lang.Object;@43ec3e30
07-12 09:23:17.383: INFO/System.out(574): [Ljava.lang.Object;@43ec4158
07-12 09:23:17.412: INFO/System.out(574): [Ljava.lang.Object;@43ec46b0
07-12 09:23:17.423: INFO/System.out(574): [Ljava.lang.Object;@43ec49e0
07-12 09:23:17.423: INFO/System.out(574): [Ljava.lang.Object;@43ec4d18
07-12 09:23:17.443: INFO/System.out(574): [Ljava.lang.Object;@43f19c90
07-12 09:23:17.453: INFO/System.out(574): [Ljava.lang.Object;@43f1a030
07-12 09:23:17.453: INFO/System.out(574): [Ljava.lang.Object;@43f1a370
07-12 09:23:17.473: INFO/System.out(574): [Ljava.lang.Object;@43e6ddc8
07-12 09:23:17.473: INFO/System.out(574): [Ljava.lang.Object;@43e6e110
07-12 09:23:17.493: INFO/System.out(574): [Ljava.lang.Object;@43e6e460
07-12 09:23:17.513: INFO/System.out(574): [Ljava.lang.Object;@43e6e7b0
07-12 09:23:17.523: INFO/System.out(574): [Ljava.lang.Object;@43f10b58
07-12 09:23:17.553: INFO/System.out(574): [Ljava.lang.Object;@43f10eb0

Answer 3

int count = friends.size();
for(int i =0 ;i < count; i++){
   System.out.println(i+"条数据"+friends.get(i));
}楼主把你每条数据打印出来 我怀疑你的数据传过来的有问题 、、 

Answer 4

当然打印一条 friends.toArray()返回的一个对象Object[]
System.out.println(friends.toArray()) 相当于System.out.println(friends.toArray().toString) 
Object的toString是这样的返回类名和hashCode
public String toString() { 
return getClass().getName() + "@" + Integer.toHexString(hashCode()); 
} 

Answer 5

你应该重写WeiBoInfo的toString，再用System.out.println(friends.toString());

Answer 6

07-12 10:27:55.692: INFO/System.out(649): [Ljava.lang.Object;@43e77f10
07-12 10:27:55.703: INFO/System.out(649): [Ljava.lang.Object;@43f197d0
07-12 10:27:55.714: INFO/System.out(649): [Ljava.lang.Object;@43f19ac0
07-12 10:27:55.723: INFO/System.out(649): [Ljava.lang.Object;@43e74380
07-12 10:27:55.732: INFO/System.out(649): [Ljava.lang.Object;@43e6ee00
07-12 10:27:55.732: INFO/System.out(649): [Ljava.lang.Object;@43e6f120
07-12 10:27:55.732: INFO/System.out(649): [Ljava.lang.Object;@43e6e858
07-12 10:27:55.744: INFO/System.out(649): [Ljava.lang.Object;@43e6eb80
07-12 10:27:55.752: INFO/System.out(649): [Ljava.lang.Object;@43ed6d30
07-12 10:27:55.752: INFO/System.out(649): [Ljava.lang.Object;@43ed7060
07-12 10:27:55.752: INFO/System.out(649): [Ljava.lang.Object;@43e343f0
07-12 10:27:55.762: INFO/System.out(649): [Ljava.lang.Object;@43e34728
07-12 10:27:55.762: INFO/System.out(649): [Ljava.lang.Object;@43f1b338
07-12 10:27:55.762: INFO/System.out(649): [Ljava.lang.Object;@43f1b678
07-12 10:27:55.792: INFO/System.out(649): [Ljava.lang.Object;@43e71da0
07-12 10:27:55.802: INFO/System.out(649): [Ljava.lang.Object;@43e720e8
07-12 10:27:55.802: INFO/System.out(649): [Ljava.lang.Object;@43e36988
07-12 10:27:55.802: INFO/System.out(649): [Ljava.lang.Object;@43e36cd8
07-12 10:27:55.822: INFO/System.out(649): [Ljava.lang.Object;@43ee6948
07-12 10:27:55.845: INFO/System.out(649): [Ljava.lang.Object;@43ee6ca0
07-12 10:27:55.845: INFO/System.out(649): 20
07-12 10:27:55.852: INFO/System.out(649): [Ljava.lang.Object;@43ec4268
07-12 10:27:55.852: INFO/System.out(649): --------------------------
07-12 10:27:55.852: INFO/System.out(649): 0条数据com.itcast.util.WeiBoInfo@43efe8c8
07-12 10:27:55.852: INFO/System.out(649): 1条数据com.itcast.util.WeiBoInfo@43f197a8
07-12 10:27:55.852: INFO/System.out(649): 2条数据com.itcast.util.WeiBoInfo@43e74060
07-12 10:27:55.852: INFO/System.out(649): 3条数据com.itcast.util.WeiBoInfo@43e74358
07-12 10:27:55.852: INFO/System.out(649): 4条数据com.itcast.util.WeiBoInfo@43e6edd8
07-12 10:27:55.852: INFO/System.out(649): 5条数据com.itcast.util.WeiBoInfo@43e6f0f8
07-12 10:27:55.852: INFO/System.out(649): 6条数据com.itcast.util.WeiBoInfo@43e6e830
07-12 10:27:55.852: INFO/System.out(649): 7条数据com.itcast.util.WeiBoInfo@43e6eb58
07-12 10:27:55.852: INFO/System.out(649): 8条数据com.itcast.util.WeiBoInfo@43ed6d08
07-12 10:27:55.852: INFO/System.out(649): 9条数据com.itcast.util.WeiBoInfo@43ed7038
07-12 10:27:55.852: INFO/System.out(649): 10条数据com.itcast.util.WeiBoInfo@43e343c8
07-12 10:27:55.852: INFO/System.out(649): 11条数据com.itcast.util.WeiBoInfo@43e34700
07-12 10:27:55.852: INFO/System.out(649): 12条数据com.itcast.util.WeiBoInfo@43f1b2b0
07-12 10:27:55.852: INFO/System.out(649): 13条数据com.itcast.util.WeiBoInfo@43f1b650
07-12 10:27:55.873: INFO/System.out(649): 14条数据com.itcast.util.WeiBoInfo@43e71d78
07-12 10:27:55.873: INFO/System.out(649): 15条数据com.itcast.util.WeiBoInfo@43e720c0
07-12 10:27:55.873: INFO/System.out(649): 16条数据com.itcast.util.WeiBoInfo@43e36960
07-12 10:27:55.883: INFO/System.out(649): 17条数据com.itcast.util.WeiBoInfo@43e36cb0
07-12 10:27:55.883: INFO/System.out(649): 18条数据com.itcast.util.WeiBoInfo@43ee68a0
07-12 10:27:55.883: INFO/System.out(649): 19条数据com.itcast.util.WeiBoInfo@43ee6c78这个是什么问题呢？

Answer 7

没重写WeiBoInfo的toString,会调用Object类的toString返回类名和hashCodepublic String toString() {  
return getClass().getName() + "@" + Integer.toHexString(hashCode());  
}  
就像上面打印的com.itcast.util.WeiBoInfo@43ee6c78

Answer 8

恩，恩，可是这个和setAdapter（）方法有什么关系呢，之前数据没有用message.obj传递的时候，数据就能设置到listView里面去，传递以后就报空指针错误，真不知道数据哪里出了问题，因为是新手，见笑了十分感激各位热心指导

Answer 9

lz能否在提供点代码，比如handler里面怎么实现数据传递的，还有param[1]这什么东东

Answer 10

下面是service里面的run方法，启动新线程来下载数据，
这个其实是用网上沈大海的那个源码改动一点。public void run() {
// TODO Auto-generated method stub
    if(weibo==null)
    {   weibo=new Weibo();
     AccessToken at=OAuthReadUtil.readToken(this);
if(at!=null)
     {weibo.setToken(at.getToken(), at.getTokenSecret());
     }
    }
while(isrun)
{ Task lasttask=null;
  Log.d("core Logic", "..............run");
  synchronized(allTask)
  {
    if(allTask.size()>0)
    {
     lasttask=allTask.get(0);
    }
   
    doTask(lasttask);
  }
  try{Thread.sleep(1000);}catch(Exception e){}
}
}
    //执行任务
public void doTask(Task task)
{Message message=hand.obtainMessage();
 
 try{
  switch(task.getTaskID())
  {case Task.TASK_USER_LOGIN://用户登录
  
  
  
   break;
  case Task.TASK_GET_USER_HOMETIMEINLINE://获取用户首页微博信息
  
         UserInfo user=ConfigHelper.nowUser;
         OAuth auth=new OAuth();
         String url = "http://api.t.sina.com.cn/statuses/friends_timeline.json";
         List params=new ArrayList();
         params.add(new BasicNameValuePair("source", auth.consumerKey)); 
         HttpResponse response =auth.SignRequest(user.getToken(), user.getTokenSecret(), url, params);
         if (200 == response.getStatusLine().getStatusCode()){
             try {
                 InputStream is = response.getEntity().getContent();
                 Reader reader = new BufferedReader(new InputStreamReader(is), 4000);
                 StringBuilder buffer = new StringBuilder((int) response.getEntity().getContentLength());
                 try {
                     char[] tmp = new char[1024];
                     int l;
                     while ((l = reader.read(tmp)) != -1) {
                         buffer.append(tmp, 0, l);
                     }
                 } finally {
                     reader.close();
                 }
                 String string = buffer.toString();
                 //Log.e("json", "rs:" + string);
                 response.getEntity().consumeContent();
                 JSONArray data=new JSONArray(string);
                 for(int i=0;i<data.length();i++)
                 {
                     JSONObject d=data.getJSONObject(i);
                     //Log.e("json", "rs:" + d.getString("created_at"));
                     if(d!=null){
                         JSONObject u=d.getJSONObject("user");
                         if(d.has("retweeted_status")){
                             JSONObject r=d.getJSONObject("retweeted_status");
                         }
                         
                        
                         String id=d.getString("id");
                         String userId=u.getString("id");
                         String userName=u.getString("screen_name");
                         String userIcon=u.getString("profile_image_url");
                         Log.e("userIcon", userIcon);
                         String time=d.getString("created_at");
                         String text=d.getString("text");
                         Boolean haveImg=false;
                         if(d.has("thumbnail_pic")){
                             haveImg=true;
                             //String thumbnail_pic=d.getString("thumbnail_pic");
                             //Log.e("thumbnail_pic", thumbnail_pic);
                         }
                         
                         if(wbList==null){
                             wbList=new ArrayList<WeiBoInfo>();
                             
                         }
                         WeiBoInfo w=new WeiBoInfo();
                         w.setId(id);
                         w.setUserId(userId);
                         w.setUserName(userName);
                         w.setTime(time);
                         w.setText(text);
                         
                         w.setHaveImage(haveImg);
                         w.setUserIcon(userIcon);
                         wbList.add(w);
                         System.out.println(wbList.toArray());
                     }
                 }
                 
             }catch (IllegalStateException e) {
                 e.printStackTrace();
             } catch (IOException e) {
                 e.printStackTrace();
             } catch (JSONException e) {
                 e.printStackTrace();
             } 
         }
      message.obj=wbList;
      
  break;         
          hand.sendMessage(message);
} --------主线程回调--------------------------------------------------       
 public Handler hand=new Handler()
{ @Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
switch(msg.what)
{
case Task.TASK_USER_LOGIN:

 IWeiboActivity ha=MainService.getActivityByName("LoginActivity");
     ha.refresh(LoginActivity.REF_LOGIN_RESULT,msg.obj);
     
 break;
case Task.TASK_GET_USER_HOMETIMEINLINE://更新Weibo首页
     IWeiboActivity hha=MainService.getActivityByName("HomeActivity");
     hha.refresh(HomeActivity.REF_WEIBO,msg.obj);这边就调用到首页的微博Activity的refresh方法，里面两个参数，REF_WEIBO分别对应refresh(Object... param)的 param[0]和param[1].....

Answer 11

1.不能打印只能打印一条是没重写toString2.空指针问题 我试过在handleMessage传进的msg在处理完后，msg会自动重置，msg.obj会为null.
可以试试把super.handleMessage(msg);放在handleMessage的最后面
或者msg一传进来重新new个WeiBoInfo实例把msg.obj拷贝过来。

Answer 12

呵呵  看到就回了 有错误最好把错误Log也贴上来好看些

Answer 13

super.handleMessage(msg)就要放在handleMessage方法的末尾，最后由父类去处理消息
下面这些代码就可以简化下了
public void refresh(Object... param) {
 Log.d("ref", (String)param[0]);
 if(((String)param[0]).equals("REF_WEIBO"))
   {
   WeiBoAdapater adapter = new WeiBoAdapater(this,(ArrayList<WeiBoInfo>)param[1]);
   Msglist.setAdapter(adapter);
   ｝

Answer 14

呵呵用下面这个办法，得出的的wbList在初始值，赋值给msg.obj后，和初始化adater对象后，打印的值是一样的，是说明数据应该没错吧。错误信息我也po一下。
              int count = wbList.size();
         for(int k =0 ;k < count; k++){
         System.out.println(k+"条未传递wbList数据"+wbList.get(k));
         }07-12 14:00:44.178: INFO/System.out(621): 0条未传递wbList数据com.itcast.util.WeiBoInfo@437a27b0
07-12 14:00:44.178: INFO/System.out(621): 1条未传递wbList数据com.itcast.util.WeiBoInfo@437942f8
07-12 14:00:44.178: INFO/System.out(621): 2条未传递wbList数据com.itcast.util.WeiBoInfo@437918e0
07-12 14:00:44.188: INFO/System.out(621): 3条未传递wbList数据com.itcast.util.WeiBoInfo@4375cd58
07-12 14:00:44.188: INFO/System.out(621): 4条未传递wbList数据com.itcast.util.WeiBoInfo@4383e3e8
07-12 14:00:44.188: INFO/System.out(621): 5条未传递wbList数据com.itcast.util.WeiBoInfo@4383d320
07-12 14:00:44.188: INFO/System.out(621): 6条未传递wbList数据com.itcast.util.WeiBoInfo@43823a00
07-12 14:00:44.188: INFO/System.out(621): 7条未传递wbList数据com.itcast.util.WeiBoInfo@43821ee8
07-12 14:00:44.198: INFO/System.out(621): 8条未传递wbList数据com.itcast.util.WeiBoInfo@438217c0
07-12 14:00:44.198: INFO/System.out(621): 9条未传递wbList数据com.itcast.util.WeiBoInfo@4381f098
07-12 14:00:44.198: INFO/System.out(621): 10条未传递wbList数据com.itcast.util.WeiBoInfo@4381c160
07-12 14:00:44.198: INFO/System.out(621): 11条未传递wbList数据com.itcast.util.WeiBoInfo@43819790
07-12 14:00:44.208: INFO/System.out(621): 12条未传递wbList数据com.itcast.util.WeiBoInfo@438176f8
07-12 14:00:44.208: INFO/System.out(621): 13条未传递wbList数据com.itcast.util.WeiBoInfo@43813dd8
07-12 14:00:44.208: INFO/System.out(621): 14条未传递wbList数据com.itcast.util.WeiBoInfo@4380d288
07-12 14:00:44.208: INFO/System.out(621): 15条未传递wbList数据com.itcast.util.WeiBoInfo@437f23d0
07-12 14:00:44.208: INFO/System.out(621): 16条未传递wbList数据com.itcast.util.WeiBoInfo@437ef5c8
07-12 14:00:44.228: INFO/System.out(621): 17条未传递wbList数据com.itcast.util.WeiBoInfo@437c2d30
07-12 14:00:44.228: INFO/System.out(621): 18条未传递wbList数据com.itcast.util.WeiBoInfo@437b58e8
07-12 14:00:44.238: INFO/System.out(621): 19条未传递wbList数据com.itcast.util.WeiBoInfo@437a052007-12 14:00:44.258: INFO/System.out(621): 0条传递后friends数据com.itcast.util.WeiBoInfo@437a27b0
07-12 14:00:44.258: INFO/System.out(621): 1条传递后friends数据com.itcast.util.WeiBoInfo@437942f8
07-12 14:00:44.268: INFO/System.out(621): 2条传递后friends数据com.itcast.util.WeiBoInfo@437918e0
07-12 14:00:44.268: INFO/System.out(621): 3条传递后friends数据com.itcast.util.WeiBoInfo@4375cd58
07-12 14:00:44.268: INFO/System.out(621): 4条传递后friends数据com.itcast.util.WeiBoInfo@4383e3e8
07-12 14:00:44.268: INFO/System.out(621): 5条传递后friends数据com.itcast.util.WeiBoInfo@4383d320
07-12 14:00:44.268: INFO/System.out(621): 6条传递后friends数据com.itcast.util.WeiBoInfo@43823a00
07-12 14:00:44.278: INFO/System.out(621): 7条传递后friends数据com.itcast.util.WeiBoInfo@43821ee8
07-12 14:00:44.278: INFO/System.out(621): 8条传递后friends数据com.itcast.util.WeiBoInfo@438217c0
07-12 14:00:44.278: INFO/System.out(621): 9条传递后friends数据com.itcast.util.WeiBoInfo@4381f098
07-12 14:00:44.278: INFO/System.out(621): 10条传递后friends数据com.itcast.util.WeiBoInfo@4381c160
07-12 14:00:44.299: INFO/System.out(621): 11条传递后friends数据com.itcast.util.WeiBoInfo@43819790
07-12 14:00:44.299: INFO/System.out(621): 12条传递后friends数据com.itcast.util.WeiBoInfo@438176f8
07-12 14:00:44.308: INFO/System.out(621): 13条传递后friends数据com.itcast.util.WeiBoInfo@43813dd8
07-12 14:00:44.308: INFO/System.out(621): 14条传递后friends数据com.itcast.util.WeiBoInfo@4380d288
07-12 14:00:44.308: INFO/System.out(621): 15条传递后friends数据com.itcast.util.WeiBoInfo@437f23d0
07-12 14:00:44.318: INFO/System.out(621): 16条传递后friends数据com.itcast.util.WeiBoInfo@437ef5c8
07-12 14:00:44.318: INFO/System.out(621): 17条传递后friends数据com.itcast.util.WeiBoInfo@437c2d30
07-12 14:00:44.318: INFO/System.out(621): 18条传递后friends数据com.itcast.util.WeiBoInfo@437b58e8
07-12 14:00:44.318: INFO/System.out(621): 19条传递后friends数据com.itcast.util.WeiBoInfo@437a0520
07-12 14:00:44.328: INFO/System.out(621): 0条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@437a27b007-12 14:00:44.338: INFO/System.out(621): 1条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@437942f8
07-12 14:00:44.338: INFO/System.out(621): 2条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@437918e0
07-12 14:00:44.338: INFO/System.out(621): 3条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@4375cd58
07-12 14:00:44.338: INFO/System.out(621): 4条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@4383e3e8
07-12 14:00:44.338: INFO/System.out(621): 5条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@4383d320
07-12 14:00:44.348: INFO/System.out(621): 6条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43823a00
07-12 14:00:44.348: INFO/System.out(621): 7条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43821ee8
07-12 14:00:44.348: INFO/System.out(621): 8条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@438217c0
07-12 14:00:44.358: INFO/System.out(621): 9条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@4381f098
07-12 14:00:44.358: INFO/System.out(621): 10条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@4381c160
07-12 14:00:44.368: INFO/System.out(621): 11条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43819790
07-12 14:00:44.378: INFO/System.out(621): 12条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@438176f8
07-12 14:00:44.378: INFO/System.out(621): 13条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43813dd8
07-12 14:00:44.378: INFO/System.out(621): 14条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@4380d288
07-12 14:00:44.388: INFO/System.out(621): 15条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@437f23d0
07-12 14:00:44.388: INFO/System.out(621): 16条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@437ef5c8
07-12 14:00:44.388: INFO/System.out(621): 17条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@437c2d30
07-12 14:00:44.401: INFO/System.out(621): 18条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@437b58e8
07-12 14:00:44.401: INFO/System.out(621): 19条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@437a052007-12 14:00:44.408: ERROR/AndroidRuntime(621): Uncaught handler: thread main exiting due to uncaught exception
07-12 14:00:44.418: ERROR/AndroidRuntime(621): java.lang.NullPointerException
07-12 14:00:44.418: ERROR/AndroidRuntime(621):     at com.itcast.ui.HomeActivity.refresh(HomeActivity.java:164) 这一行就是Msglist.setAdapter(adapter)；
07-12 14:00:44.418: ERROR/AndroidRuntime(621):     at com.itcast.logic.MainService$1.handleMessage(MainService.java:340)
07-12 14:00:44.418: ERROR/AndroidRuntime(621):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-12 14:00:44.418: ERROR/AndroidRuntime(621):     at android.os.Looper.loop(Looper.java:123)
07-12 14:00:44.418: ERROR/AndroidRuntime(621):     at android.app.ActivityThread.main(ActivityThread.java:4203)
07-12 14:00:44.418: ERROR/AndroidRuntime(621):     at java.lang.reflect.Method.invokeNative(Native Method)
07-12 14:00:44.418: ERROR/AndroidRuntime(621):     at java.lang.reflect.Method.invoke(Method.java:521)
07-12 14:00:44.418: ERROR/AndroidRuntime(621):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
07-12 14:00:44.418: ERROR/AndroidRuntime(621):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
07-12 14:00:44.418: ERROR/AndroidRuntime(621):     at dalvik.system.NativeStart.main(Native Method)

Answer 15

System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>" + Msglist == null);
System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>" + adapter== null);
打印看下到底Msglist 和adapter这2个哪个是null

Answer 16

07-12 14:25:19.014: INFO/System.out(664): false
07-12 14:25:19.032: INFO/System.out(664): false哎，欲哭无泪。The application has stopped unexpectedly,please try again.我都看呕心了。。呵呵

Answer 17

哈哈，哎奇怪了都不为null，报什么NullPointerException

Answer 18

可能对我来说永远是个迷了ORZ.....

Answer 19

//Adapterclass WeiBoAdapater extends BaseAdapter
{   private AsyncImageLoader asyncImageLoader;
    private List<WeiBoInfo> wbList;
    Context context;
    public WeiBoAdapater(Context con,List<WeiBoInfo> list) {
this.context=con;
this.wbList=list;
}@Override
public int getCount() {
    return wbList.size();
}@Override
public Object getItem(int position) {
    return wbList.get(position);
}@Override
public long getItemId(int position) {
    return position;
}@Override
public View getView(int position, View convertView, ViewGroup parent) {

    asyncImageLoader = new AsyncImageLoader();
    convertView = LayoutInflater.from(this.context).inflate(R.layout.itemview, null);
    WeiBoHolder wh = new WeiBoHolder();
    wh.wbicon = (ImageView) convertView.findViewById(R.id.ivItemPortrait);
    wh.wbtext = (TextView) convertView.findViewById(R.id.tvItemContent);
    wh.wbtime = (TextView) convertView.findViewById(R.id.tvItemDate);
    wh.wbuser = (TextView) convertView.findViewById(R.id.tvItemName);
    wh.wbimage=(ImageView) convertView.findViewById(R.id.contentPic);
    
    WeiBoInfo wb = wbList.get(position);
    if(wb!=null){
        convertView.setTag(wb.getId());
        wh.wbuser.setText(wb.getUserName());
        wh.wbtime.setText(wb.getTime());
        wh.wbtext.setText(wb.getText(), TextView.BufferType.SPANNABLE);        Drawable cachedImage = asyncImageLoader.loadDrawable(wb.getUserIcon(),wh.wbicon, new ImageCallback(){            @Override
            public void imageLoaded(Drawable imageDrawable,ImageView imageView, String imageUrl) {
                imageView.setImageDrawable(imageDrawable);
            }
            
        });                wh.wbicon.setImageDrawable(cachedImage);    }
    
    return convertView;
    }

Answer 20

这个问题不是今天的问题了，不然也不会跑到csdn劳师动众，呵呵，电脑每天都会关机的哈哈哈哈。

Answer 21

而且adapter里面数据也没问题哦，
            //-----------------------------------------------  
            WeiBoAdapater adapter = new WeiBoAdapater(HomeActivity.this,friends);
            //--------------------------------------------------
            int ct= adapter.getCount();
            for(int j=0;j<ct;j++){
            System.out.println(j+"条adpter初始化后wbList数据"+adapter.getItem(j));}
            //---------------------------------------------------------执行结果：
07-12 15:00:30.399: INFO/System.out(771): 0条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43873cd8
07-12 15:00:30.399: INFO/System.out(771): 1条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43873de0
07-12 15:00:30.408: INFO/System.out(771): 2条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43873ea0
07-12 15:00:30.408: INFO/System.out(771): 3条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43873f60
07-12 15:00:30.408: INFO/System.out(771): 4条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43874038
07-12 15:00:30.418: INFO/System.out(771): 5条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@438740f8
07-12 15:00:30.418: INFO/System.out(771): 6条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@438741b8
07-12 15:00:30.418: INFO/System.out(771): 7条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43874278
07-12 15:00:30.418: INFO/System.out(771): 8条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43874338
07-12 15:00:30.418: INFO/System.out(771): 9条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@438743f8
07-12 15:00:30.428: INFO/System.out(771): 10条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@438744b8
07-12 15:00:30.428: INFO/System.out(771): 11条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43874578
07-12 15:00:30.438: INFO/System.out(771): 12条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43874638
07-12 15:00:30.438: INFO/System.out(771): 13条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43874770
07-12 15:00:30.438: INFO/System.out(771): 14条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43874830
07-12 15:00:30.438: INFO/System.out(771): 15条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@438748f0
07-12 15:00:30.448: INFO/System.out(771): 16条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@438749b0
07-12 15:00:30.448: INFO/System.out(771): 17条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43874a70
07-12 15:00:30.448: INFO/System.out(771): 18条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43874b30
07-12 15:00:30.448: INFO/System.out(771): 19条adpter初始化后wbList数据com.itcast.util.WeiBoInfo@43874bf0

Answer 22

getView方法做如下修改看成不成
@Override
public View getView(int position, View convertView, ViewGroup parent) {
    asyncImageLoader = new AsyncImageLoader();
    WeiBoHolder wh = null;
  if (null == convertView){
    convertView = LayoutInflater.from(this.context).inflate(R.layout.itemview, null);
    wh = new WeiBoHolder();
    wh.wbicon = (ImageView) convertView.findViewById(R.id.ivItemPortrait);
    wh.wbtext = (TextView) convertView.findViewById(R.id.tvItemContent);
    wh.wbtime = (TextView) convertView.findViewById(R.id.tvItemDate);
    wh.wbuser = (TextView) convertView.findViewById(R.id.tvItemName);
    wh.wbimage=(ImageView) convertView.findViewById(R.id.contentPic);
    convertView.setTag(wh);
  }else{
     wh = (WeiBoHolder)convertView.getTag();
  }
    WeiBoInfo wb = wbList.get(position);
    if(wb!=null){
        wh.wbuser.setText(wb.getUserName());
        wh.wbtime.setText(wb.getTime());
        wh.wbtext.setText(wb.getText(), TextView.BufferType.SPANNABLE);        Drawable cachedImage = asyncImageLoader.loadDrawable(wb.getUserIcon(),wh.wbicon, new ImageCallback(){            @Override
            public void imageLoaded(Drawable imageDrawable,ImageView imageView, String imageUrl) {
                imageView.setImageDrawable(imageDrawable);
            }
            
        });                wh.wbicon.setImageDrawable(cachedImage);    }
    
    return convertView;
    }

Answer 23

hmm.......错误一样一样的，。还是谢谢兄弟了

Answer 24

请问你的 Msglist 被正确初始化了吗？ 我怀疑 Msglist 就是个null的

Answer 25

while(isrun)
        { Task lasttask=null;
          Log.d("core Logic", "..............run");
          synchronized(allTask)
          {    
            if(allTask.size()>0) ///这里你能确保alltask的size大于0吗            {
                lasttask=allTask.get(0);
            }
           
            doTask(lasttask);
          }
          try{Thread.sleep(1000);}catch(Exception e){}

Answer 26

我上面有尝试判断adapter和msglist的值都不是空值哦，这个问题奇怪的就是，如果我把获取数据的模块和weiboadapater放在一个activity里面就能成功setadapter,所以Msglist的初始化理论上应该没有问题

Answer 27

Task只是为了启动新线程，没有task的话程序根本就不会跳转吧。。我有在首页的activity的oncreat方法中添加task哦

Answer 28

今天无意调试了一下，终于发现问题了，只要是在refresh方法里调用到Msglist的地方就报空指针错误，看来肯定是他的错误了，检查了下代码，下面的代码原来我是放在onCreate方法里面声明的，移到refresh方法里面就ok了。我是不是又小白了。。一直以为是数据错误，绕了好大一圈。
ListView Msglist=(ListView)findViewById(R.id.freelook_listview);感谢各位朋友指点。收获很多，

Answer 29

那为什么以前打印出是Msglist == null 返回 false？
声明在onCreate和refresh里面不一样吗？它们不在一个类？

Answer 30

全都是声明在一个activity里面。我是这么声明的。先是声明了一个成员变量ListView Msglist。
然后在onCreate方法里初始化：Msglist=(ListView)findViewById(R.id.freelook_listview)。最后在refresh方法里面调用

Answer 31

这个Activity里面我就申明了一个类，Adapter也是成员类的。

Answer 32

我擦。。哥 Msglist你没有定义成 类得成员变量。 这样定义相当于 Msglist变量只在onCreate 方法里有效。还是略奇葩了