使用的ListView與片段

我試圖使用與片段自定義適配器（baseAdapter）列表視圖自定義適配器（baseAdapter）。使用的ListView與片段

當我我們這次代碼直接在MainActivity裏面的一切工作正常，但是當我使用這片段是我以前不崩潰，但它不顯示任何東西，它只是一個空白片段。不要在活動中顯示。

片段代碼

public class fragment_activity_pisaniya extends ListFragment { 
     List<String> listChapter = new ArrayList<>(); 
     //private CustomChapterListAdapter adapter; 
     private ListView listView; 
     ArrayList<String> items = new ArrayList<String>(); 
     Context context; 
     private View view; 
     public fragment_activity_pisaniya() { } 
     @Nullable 
     @Override 
     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
      super.onCreateView(inflater, container, savedInstanceState); 
      if (view==null) { 
       view = inflater.inflate(R.layout.fragment_pisaniya_book, container, false); 
      } 
       listView = (ListView)view.findViewById(R.id.listView); 
      CustomChapterListAdapter adapter = new CustomChapterListAdapter(getActivity()); 
      AssetManager assetManager = getResources().getAssets(); 
      int z = 1; 
      int a = 1; 
      try { 
       for (int i = 0; i < assetManager.list("html").length; i++) { 
        String[] file = new String[0]; 
        try { 
         file = assetManager.list("html"); 
        } catch (IOException e) { 
         e.printStackTrace(); 
        } 
        String hhh = file[i]; 
        listChapter.add(hhh.replaceAll(".html$", "").replaceAll("_", " ")); 
        String arr[] = hhh.split("_", 4); 
        String three = arr[2].replaceAll(".html$", "").replaceAll("_", " "); 

        if (Integer.valueOf(arr[0]) == z) { 
         adapter.addSectionHeaderItem(new ListClassChapter((three), 0)); 
         String four = arr[3].replaceAll(".html$", "").replaceAll("_", " "); 

         z++; 
        } else { 
         if (Integer.valueOf(arr[0]) == a) { 
          String item=arr[3].replaceAll(".html$", "").replaceAll("_", " "); 
          adapter.addItem(new ListClassChapter(item)); 
         } else { 
          a++; 
         } 
        } 
       } 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 

      listView.setAdapter(adapter); 
      adapter.notifyDataSetChanged(); 
      return view; 
     } 

    }

定義適配器

public class CustomChapterListAdapter extends BaseAdapter { 
     private static final int TYPE_ITEM = 0; 
     private static final int TYPE_HEADER = 1; 

     private ArrayList<ListClassChapter> mData = new ArrayList<ListClassChapter>(); 
     private TreeSet<Integer> sectionHeader = new TreeSet<Integer>(); 

     private LayoutInflater mInflater; 

     public CustomChapterListAdapter(Context context) { 

      mInflater = (LayoutInflater) context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     } 

     public void addItem(final ListClassChapter item) { 
      mData.add(item); 
      notifyDataSetChanged(); 
     } 

     public void addSectionHeaderItem(final ListClassChapter item) { 
      mData.add(item); 
      sectionHeader.add(mData.size() - 1); 
      notifyDataSetChanged(); 
     } 

     @Override 
     public int getItemViewType(int position) { 
      return sectionHeader.contains(position) ? TYPE_HEADER : TYPE_ITEM; 
     } 

     @Override 
     public int getViewTypeCount() { 
      return 2; 
     } 

     @Override 
     public int getCount() { 
      return mData.size(); 
     } 

     @Override 
     public ListClassChapter getItem(int position) { 
      return mData.get(position); 
     } 

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

     public View getView(int position, View convertView, ViewGroup parent) { 
      ViewHolder holder = null; 
      int rowType = getItemViewType(position); 

      if (convertView == null) { 
       holder = new ViewHolder(); 
       switch (rowType) { 
        case TYPE_ITEM: 
         convertView = mInflater.inflate(R.layout.row_item, null); 
         holder.textView = (TextView) convertView.findViewById(R.id.txtName); 
         holder.txtValue = (TextView) convertView.findViewById(R.id.txtValue); 
         break; 
        case TYPE_HEADER: 
         convertView = mInflater.inflate(R.layout.header_item, null); 
         holder.textView = (TextView) convertView.findViewById(R.id.textSeparator); 
         break; 
       } 
       convertView.setTag(holder); 
      } else { 
       holder = (ViewHolder) convertView.getTag(); 
      } 

      if(rowType == TYPE_ITEM){ 
       holder.textView.setText(mData.get(position).gettName()); 
       holder.txtValue.setText(""+mData.get(position).getAmount()); 
      }else if(rowType == TYPE_HEADER){ 
       holder.textView.setText(mData.get(position).gettName()); 
      } 
      return convertView; 
     } 
     public static class ViewHolder { 
      public TextView textView; 
      public TextView txtValue; 
     } 
    }

請幫助。

來源

2017-08-05 Andrij Kan

通過看你的代碼，我認爲問題是當ü適配器設置值即

adapter.addSectionHeaderItem(new ListClassChapter((three), 0));

每次

你正在創造新的實例。

來源

2017-08-05 13:13:17

使用的ListView與片段

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