notifyDataSetChanged無法更新我的ListView片段

Question

在我的情況下，我使用片段作爲一個活動中的選項卡。我想在創建片段時加載信息。所以我用一個Runnable運行httprequest並把這些響應返回給定製的處理，我叫mAdapter.notifyDataSetChanged()

這裏談到的問題的片段中，該片段內的ListView未能更新其觀點後，我調用的方法notifyDataSetChanged() 。

我跟蹤堆棧，並發現的notifyDataSetChanged()呼叫後，適配器並調用它的方法getCount()和getCount()做了零返回一個值，但適配器的getCount()通話後沒有調用它的方法getView()。

public class ProductReviewFragment extends Fragment { 


private View mBackgroundView = null; 

private ProductHelper mProductHelper = null; 

private PullToRefreshListView mListView = null; 

private int pre = 20; 

private long mark = 0; 

private long productId = 0; 

private List<ProductThread> listProductThread = new ArrayList<ListProductReviewResponse.ProductThread>(); 

private class MyHandler extends Handler{ 
    private ProductReviewFragment mActivity = null; 

    public MyHandler(ProductReviewFragment activity){ 
     mActivity = activity; 
    } 

    @Override 
    public void handleMessage(Message msg) { 
     super.handleMessage(msg); 

     switch (msg.what) { 
     case ProductHelper.GET_PRODUCT_REVIEW_SUCCESS: 
      ListProductReviewResponse response = (ListProductReviewResponse)msg.obj; 
      if (response != null) { 
       if (response.getProductThreadList()!=null) { 
        mActivity.listProductThread.addAll(response.getProductThreadList()); 
       } 
       mActivity.mark = response.getMark(); 
       mActivity.mAdapter.notifyDataSetChanged(); 
      } 
      mActivity.mListView.onRefreshComplete(); 
      if (mActivity.listProductThread.size()>=response.getTotalNumber()) { 
       mActivity.mListView.setMode(Mode.DISABLED); 
      } 
      break; 
     case ProductHelper.GET_PRODUCT_REVIEW_FAILED: 
      mActivity.mListView.onRefreshComplete(); 
      if (msg.obj!=null) { 
       NetWorkException exception = (NetWorkException)msg.obj; 
       NetWorkException.handlerResultNetWorkNotAvailable(mActivity.getActivity(), exception); 
      } 
     default: 

      break; 
     } 

    } 
} 

private MyHandler mHandler = new MyHandler(this); 

private class MyAdapter extends BaseAdapter{ 

    @Override 
    public int getCount() { 
     int i = listProductThread.size(); 
     return i; 
    } 

    @Override 
    public Object getItem(int position) { 
     return listProductThread.get(position); 
    } 

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

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     ViewHolder holder; 
     if (convertView==null) { 
      holder = new ViewHolder(); 

      convertView = View.inflate(getActivity(), R.layout.product_review_cell, null); 

      holder.rivHead = (RoundImageView)convertView.findViewById(R.id.product_comment_head); 

      holder.tvName = (TextView)convertView.findViewById(R.id.product_comment_user); 

      holder.tvContent = (TextView)convertView.findViewById(R.id.product_comment_content); 

      convertView.setTag(holder); 
     } 
     holder = (ViewHolder)convertView.getTag(); 

     holder.rivHead.setImageInfo(ImageInfo.obtain(ImageCategories.CATEGORY_ROUND_HEAD, listProductThread.get(position).getUser().getAvatarURL())); 

     holder.tvName.setText(listProductThread.get(position).getUser().getUserName()); 

     holder.tvContent.setText(listProductThread.get(position).getContent()); 

     return convertView; 
    } 

    private class ViewHolder { 
     RoundImageView rivHead = null; 
     TextView tvName = null; 
     TextView tvContent = null; 
    } 
} 

private MyAdapter mAdapter = new MyAdapter(); 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    Bundle bundle = getArguments(); 
    if (bundle!=null) { 
     productId = bundle.getLong(ProductHelper.PRODUCT_ID); 
    } 

    mProductHelper = new ProductHelper(getActivity().getApplicationContext()); 
    mProductHelper.getProductReview(productId, mark, pre, mHandler); 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
    mBackgroundView = inflater.inflate(R.layout.pulltorefresh_list_fragment, null); 
    return mBackgroundView; 
} 

@Override 
public void onActivityCreated(Bundle savedInstanceState) { 
    super.onActivityCreated(savedInstanceState); 

    initUI(); 

} 

public void initUI(){ 


    mListView = (PullToRefreshListView) mBackgroundView.findViewById(R.id.fragment_listview); 

    mListView.setMode(Mode.PULL_FROM_END); 

    mListView.setAdapter(mAdapter); 
} 

} 

Answer 1

你已經把你的OnCreate代碼onCreateView方法或ActivityCreated method..because你的XML UI在onCreateview方法和onCreateView之前調用，所以只需將代碼onCreate方法綁定...