CustomList未加入片段

我一直在這裏停留了很長一段時間。我使用異步任務來檢索事件列表並將它們添加到片段內的列表視圖中。但是，它並沒有顯示出來。有人能告訴我什麼是錯的嗎？這將是一個很大的幫助。CustomList未加入片段

這裏的片段的代碼：

public static class EventsSectionFragment extends Fragment { 
    /** 
    * The fragment argument representing the section number for this 
    * fragment. 
    */ 
    public static final String ARG_SECTION_NUMBER = "section_number"; 
    SharedPreferences settings = null; 
    Editor editor; 
    ListView list; 
    TextView noEventsTv; 

    public EventsSectionFragment() { 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
    { 
     recLifeCycle_with_savedInstanceState(savedInstanceState); 
     View rootView = inflater.inflate(R.layout.fragment_events, container, false); 

     list = (ListView) rootView.findViewById(R.id.list); 
     noEventsTv = (TextView) rootView.findViewById(R.id.norecordsTV); 

     new GetEventsAsyncTask((MainActivity) getActivity()).execute(); 

     settings = PreferenceManager.getDefaultSharedPreferences(getActivity()); 

     return rootView; 
    } 

    public void updateEventList(final List<Event> eventList) 
    { 

     Log.i("updateEventList:eventlist.count", String.valueOf(eventList.size())); 

     if (eventList.size() > 0) 
     { 

      Log.i("CustomList", "Start customlist inflation"); 
      CustomList adapter = new CustomList(getActivity(), eventList); 

      noEventsTv.setVisibility(View.GONE); 
      list.setVisibility(View.VISIBLE); 
      list.setAdapter(adapter); 
      list.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
       @Override 
       public void onItemClick(AdapterView<?> parent, View view, 
         int position, long id) { 

        String eventSel = eventList.get(position).getEvent_id(); 
        event_id = eventSel; 
        // direct to event details fragment 
        startEventDetailsFragment(); 
       } 
      }); 
      adapter.notifyDataSetChanged(); 
      list.invalidateViews(); 
     } 
     else 
     { 
      noEventsTv.setVisibility(View.VISIBLE); 
      list.setVisibility(View.GONE); 
     } 
    }

這裏的異步任務檢索的事件：

public class GetEventsAsyncTask extends AsyncTask<Void, Integer, Boolean>{ 

ProgressDialog progressDialog; 
MainActivity activityMain; 
Boolean ticketValid=false; 
List<Event> eventList = new ArrayList<Event>(); 

public GetEventsAsyncTask(MainActivity parent) 
{ 
    activityMain = parent; 
} 

@Override 
    protected void onPreExecute() { 

     progressDialog = null; 

     if (progressDialog == null) 
     { 
       progressDialog = new ProgressDialog(activityMain); 
       progressDialog.setMessage("download events, please wait..."); 
       progressDialog.show(); 
       progressDialog.setCanceledOnTouchOutside(false); 
       progressDialog.setCancelable(false); 
     } 
    } 

     @Override 
     protected Boolean doInBackground(Void... params) { 
     // TODO Auto-generated method stub 
      Boolean error = false; 
      try { 
       error = postData(); 
      } catch (JSONException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      return error; 
     } 

     protected void onPostExecute(Boolean error){   
      /* if (progressDialog.isShowing()) { 
        progressDialog.dismiss(); 
        progressDialog = null; 
       } */ 
       if(error==true) 
       { 
        Log.i("GetEvents", "Error at get events"); 
        activityMain.errorOccured(); 
       } 
       else 
       { 
        Log.i("onPostExecute:eventlist.count",String.valueOf(eventList.size())); 
        MainActivity.myDB.removeAllEvents(); 
        for(int i=0;i<eventList.size();i++) 
        { 
         MainActivity.myDB.insertEventEntry(eventList.get(i)); 
        } 
        activityMain.downloadEventsSuccess(eventList); 

       } 

     } 

     protected void onProgressUpdate(Integer... progress){ 
     } 


    public Boolean postData() throws JSONException { 

     Boolean error = false; 
     HttpClient httpclient = new DefaultHttpClient(); 
     // specify the URL you want to post to 

     try { 

      HttpGet httpget = new HttpGet(Constants.HOST_NAME+"/"+Constants.SERVICE_NAME+"/api/event?userId=S6871919D"); 
      BufferedReader reader; 
      StringBuffer sb; 
      String line = ""; 
      String NL=""; 
      String json; 
      HttpResponse response = httpclient.execute(httpget); 

      if(response.getStatusLine().getStatusCode()==200) 
      { 
       reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8")); 

       sb = new StringBuffer(""); 
       line = ""; 
       NL = System.getProperty("line.separator"); 

       while ((line = reader.readLine()) != null) 
       { 
        sb.append(line + NL); 
       } 

       reader.close(); 
       json = sb.toString(); 

       Log.i("event json",json); 
       try 
       { 
        JSONArray jsonArray = new JSONArray(json); 

        for (int i = 0, length = jsonArray.length(); i < length; i++) 
        { 
         JSONObject attribute = jsonArray.getJSONObject(i); 
         Event eventObj = new Event(); 
         eventObj.setEvent_id(attribute.getString("event_id")); 
         eventObj.setEvent_title(attribute.getString("event_title")); 
         eventObj.setEvent_desc(attribute.getString("event_desc")); 
         eventObj.setStart_date(attribute.getString("start_date")); 
         eventObj.setEnd_date(attribute.getString("end_date")); 
         eventObj.setStart_time(attribute.getString("start_time")); 
         eventObj.setEnd_time(attribute.getString("end_time")); 
         eventObj.setLocation(attribute.getString("location")); 
         eventObj.setPicture_path(attribute.getString("picture_path")); 
         eventObj.setSmall_picture_path(attribute.getString("small_picture_path")); 

         eventList.add(eventObj); 
         eventObj = null; 
        } 
       } 
       catch (JSONException e) 
       { 
        e.printStackTrace(); 
        error = true; 
       } 
      } 
      else 
      { 
       error = true; 
      } 


     } catch (ClientProtocolException e) { 
      // process execption 
      error = true; 
     } catch (IOException e) { 
      // process execption 
      error = true; 
     } 
     return error; 

    }

這裏的customList的代碼：

private final Activity context; 
private final List<Event> eventsList; 

public CustomList(Activity context, List<Event> eventsList) { 
    super(context, R.layout.list_single); 
    this.context = context; 
    this.eventsList = eventsList; 


} 
@Override 
public View getView(int position, View view, ViewGroup parent) { 

    //set up the inflater... 
    LayoutInflater inflater = context.getLayoutInflater(); 
    View rowView= inflater.inflate(R.layout.list_single, null, true); 

    //reference the widgets... 
    TextView txtTitle = (TextView) rowView.findViewById(R.id.txt); 
    TextView txtDate = (TextView) rowView.findViewById(R.id.txt2); 
    ImageView imageView = (ImageView) rowView.findViewById(R.id.img); 
    Log.i("CustomList", "Start customList"); 

    txtTitle.setText(eventsList.get(position).getEvent_title()); 
    txtDate.setText(eventsList.get(position).getStart_date()); 
    new GetEventsImageAsyncTask(imageView).execute(Constants.HOST_NAME + "/"+ Constants.CMS_NAME+ "/" +eventsList.get(position).getSmall_picture_path()); 

    Log.i("CustomList", "End customList"); 

    return rowView; 
}

這裏的異步任務檢索來自服務器的圖像：

public class GetEventsImageAsyncTask extends AsyncTask<String, Void, Bitmap> { 

    ImageView imageView; 

    public GetEventsImageAsyncTask(ImageView imageView){ 
     this.imageView = imageView; 
    } 

    @Override 
    protected Bitmap doInBackground(String... url) { 
     // TODO Auto-generated method stub 
     String urls = url[0]; 
     Bitmap icon = null; 

     try 
     { 
      InputStream input = new java.net.URL(urls).openStream(); 
      icon = BitmapFactory.decodeStream(input); 
     } 

     catch(Exception e) 
     { 
      Log.e("GetEventImage", e.getMessage()); 
      e.printStackTrace(); 
     } 

     return icon; 
    } 

    protected void onPostExecute(Bitmap result){ 
     imageView.setImageBitmap(result); 
    }

這裏的自定義列表中的XML：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/list_single" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:background="@drawable/bg" 
android:orientation="horizontal"> 

    <ImageView 
     android:id="@+id/img" 
     android:layout_width="50dp" 
     android:layout_height="match_parent" 
     android:contentDescription="@drawable/ic_launcher"/> 

    <TextView 
     android:id="@+id/txt" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_toRightOf="@+id/img" 
     android:text="Placeholder" /> 

    <TextView 
     android:id="@+id/txt2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_toRightOf="@+id/img" 
     android:layout_marginTop="7dp" 
     android:layout_below="@+id/txt" 
     android:text="Placeholder" />

這是事件片段的XML：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/fragment_events" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" > 

    <LinearLayout 
     android:orientation="vertical" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:background="@drawable/bg"> 

     <ListView 
      android:id="@+id/list" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" > 
     </ListView> 

     <TextView 
       android:id="@+id/norecordsTV" 
       android:layout_width="fill_parent" 
       android:layout_height="fill_parent" 
       android:text="@string/no_events" 
       android:visibility="gone" 
       android:gravity="center"/> 
    </LinearLayout> 
</FrameLayout>

代碼不連去CustomList適配器=新CustomList（getActivity（），活動列表）;我不知道爲什麼。順便檢索事件順便說一句。

編輯：

這裏的logcat的：

10-10 12:56:44.193: I/updateEventList:eventlist.count(16963): 4 
10-10 12:56:56.473: I/MYTAG(16963): FacilitiesSectionFragment.onPause 
10-10 12:56:56.473: I/MYTAG(16963): FacilitiesSectionFragment.onStop 
10-10 12:56:56.473: I/MYTAG(16963): FacilitiesSectionFragment.onDestroyView 
10-10 12:56:56.553: I/dalvikvm(16963): Total arena pages for JIT: 25 
10-10 12:56:56.553: I/dalvikvm(16963): Total arena pages for JIT: 26 
10-10 12:56:56.553: I/dalvikvm(16963): Total arena pages for JIT: 27 
10-10 12:56:56.553: I/dalvikvm(16963): Total arena pages for JIT: 28 
10-10 12:56:56.553: I/dalvikvm(16963): Total arena pages for JIT: 29 
10-10 12:56:56.553: I/dalvikvm(16963): Total arena pages for JIT: 30 
10-10 12:56:56.553: I/dalvikvm(16963): Total arena pages for JIT: 31 
10-10 12:56:56.553: I/dalvikvm(16963): Total arena pages for JIT: 32 
10-10 12:56:56.563: I/dalvikvm(16963): Total arena pages for JIT: 33 
10-10 12:56:56.563: I/dalvikvm(16963): Total arena pages for JIT: 34 
10-10 12:56:56.563: I/dalvikvm(16963): Total arena pages for JIT: 35 
10-10 12:56:56.563: I/dalvikvm(16963): Total arena pages for JIT: 36 
10-10 12:56:56.563: I/dalvikvm(16963): Total arena pages for JIT: 37 
10-10 12:56:56.563: I/dalvikvm(16963): Total arena pages for JIT: 38 
10-10 12:56:56.563: I/dalvikvm(16963): Total arena pages for JIT: 39 
10-10 12:56:56.563: I/dalvikvm(16963): Total arena pages for JIT: 40 
10-10 12:56:56.563: I/dalvikvm(16963): Total arena pages for JIT: 41 
10-10 12:56:57.333: I/MYTAG(16963): FacilitiesSectionFragment.onCreateView/savedInstanceState == null 
10-10 12:56:57.333: I/MYTAG(16963): FacilitiesSectionFragment.onStart 
10-10 12:56:57.333: I/MYTAG(16963): FacilitiesSectionFragment.onResume 
10-10 12:56:57.383: I/facility json(16963): [{"facility_id":"ITM00000002","facility_name":"Libary","facility_desc":"The Nanyang Polytechnic Library provides a rich and diverse collection of resources to serve the information and research needs of staff and students.","requires_booking":"N","school_code":"ARO","open_hrs":"0900","close_hrs":"2100","open_for_book":null,"picture_path":"Data/Sites/1/uploads/alumniAdmin_Facility_2014-09-22_03-51-30.png","small_picture_path":"Data/Sites/1/uploads/alumniAdmin_Facility_2014-09-22_03-30-54.png","close_from":"0001-01-01T00:00:00","close_to":"0001-01-01T00:00:00","fee":"0.00"},{"facility_id":"ITM00000004","facility_name":"Table Tennis","facility_desc":"Table Tennis for playing table tennis","requires_booking":"N","school_code":"ARO","open_hrs":"0900","close_hrs":"2100","open_for_book":null,"picture_path":"Data/Sites/1/uploads/alumniAdmin_Facility_2014-09-22_03-31-44.png","small_picture_path":"Data/Sites/1/uploads/alumniAdmin_Facility_2014-09-22_03-31-44.jpg","close_from":"0001-01-01T00:00:00","close_to":"0001-01-01T00:00:00","fee":"3.00"},{"facility_id":"ITM00000009","facility_name":"Badminton Court Pass","facility_desc":"Badminton Court Pass","requires_booking":"N","school_code":"ARO","open_hrs":"0900","close_hrs":"2100","open_for_book":null,"picture_path":"Data/Sites/1/uploads/leowzzaro_Facility_2014-10-08_11-29-05.png","small_picture_path":"Data/Sites/1/uploads/leowzzaro_Facility_2014-10-08_11-29-05.jpg","close_from":"0001-01-01T00:00:00","close_to":"0001-01-01T00:00:00","fee":"0.00"},{"facility_id":"ITM00000014","facility_name":"Badminton Court","facility_desc":"Badminton Court for playing badminton","requires_booking":"Y","school_code":"ARO","open_hrs":"0900","close_hrs":"2100","open_for_book":null,"picture_path":"Data/Sites/1/uploads/leowzzaro_Facility_2014-10-08_11-22-44.png","small_picture_path":"Data/Sites/1/uploads/leowzzaro_Facility_2014-10-08_11-22-44.jpg","close_from":"0001-01-01T00:00:00","close_to":"0001-01-01T00:00:00","fee":"3.00"}] 
10-10 12:56:57.393: I/onPostExecute:facilityList.count(16963): 4 
10-10 12:56:57.403: W/MY_LOG(16963): Removing Entries from facilities Success 
10-10 12:56:57.403: W/MY_LOG(16963): Inserted EntryName=Libary into table facilities 
10-10 12:56:57.433: W/MY_LOG(16963): Inserted EntryName=Table Tennis into table facilities 
10-10 12:56:57.453: W/MY_LOG(16963): Inserted EntryName=Badminton Court Pass into table facilities 
10-10 12:56:57.493: W/MY_LOG(16963): Inserted EntryName=Badminton Court into table facilities 
10-10 12:56:57.513: I/updateEventList:eventlist.count(16963): 4 
10-10 12:57:06.523: I/MYTAG(16963): EcardSectionFrontFragment.onPause 
10-10 12:57:06.523: I/MYTAG(16963): EcardSectionFrontFragment.onStop 
10-10 12:57:06.533: I/MYTAG(16963): EcardSectionFrontFragment.onDestroyView 
10-10 12:57:06.533: I/MYTAG(16963): TicketSectionFragment.onCreateView/savedInstanceState == null 
10-10 12:57:06.543: I/MYTAG(16963): TicketSectionFragment.onStart 
10-10 12:57:06.543: I/MYTAG(16963): TicketSectionFragment.onResume 
10-10 12:57:14.203: I/MYTAG(16963): EcardSectionFrontFragment.onCreateView/savedInstanceState == null 
10-10 12:57:14.203: I/MYTAG(16963): TicketSectionFragment.onPause 
10-10 12:57:14.203: I/MYTAG(16963): TicketSectionFragment.onStop 
10-10 12:57:14.203: I/MYTAG(16963): TicketSectionFragment.onDestroyView 
10-10 12:57:14.203: I/MYTAG(16963): EcardSectionFrontFragment.onStart 
10-10 12:57:14.203: I/MYTAG(16963): EcardSectionFrontFragment.onResume

來源

2014-10-10 Aurorer D. Wysteria

發佈你的logcat – Brendon 2014-10-10 03:47:09

logcat中沒有錯誤。但是我會發布它。 – 2014-10-10 03:58:54

你確定你的eventList大小是> 0嗎？如果你沒有檢查這部分，做一個登錄該區域，並確保它是大於0值.. – Brendon 2014-10-10 04:01:38

你CustomList適配器沒有列表的數量，所以加入這個下面的方法可以解決這個問題..

@Override public int getCount() 
{ 
if (List.size() <= 0) 
{ 
    return 0; 
    } 
return List.size(); 
} 

@Override 
public Event getItem(int position) 
{ 
    return List.get(position); 
} 

@Override 
public long getItemId(int position) 
{ 
    return position; 
}

來源

2014-10-10 07:04:11 Brendon

但是，它仍然只顯示一個條目。我應該在customList的getView中添加什麼，以便它顯示所有條目？ – 2014-10-10 07:31:48

檢查我的答案更新.. @ AurorerD.Wysteria – Brendon 2014-10-10 08:38:37

當我將getItem的返回更改爲對象時發生錯誤。返回類型與ArrayAdapter .getItem（int）不兼容。當我嘗試將它從字符串更改爲對象時，此錯誤位於返回類型 – 2014-10-10 09:30:25

CustomList未加入片段

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