android - gridview 在 notifiedDatasetChangedCalled 时自动更改位置？

Question

这是一个应用程序，我在其中显示一些带有图像背景的文本，但它的位置发生了变化当调用 notifieddatasetchanged() 时自动，请帮助我如何固定它的固定位置，下面是我的代码。谢谢你

 public View getView(final int position, View convertView, ViewGroup parent) {
        //ImageView imageView;
        View v;
        TextView tv = null;
        if (convertView == null) { 


            LayoutInflater li = getLayoutInflater();
            v = li.inflate(R.layout.show_table_gridview, null);
            tv = (TextView)      
                            v.findViewById(R.id.tab_num);
            tv.setText(""+position+1));                 

            tv.setTextColor(Color.BLACK);
            HashMap<Integer, List<OrderlistData>> orederMap1 = ConText
            .getTotlaMap();
            List<OrderlistData> orderlist1 = new ArrayList<OrderlistData>();
            Set<Integer> keySet1 = orederMap1.keySet();
              if (keySet1.contains(position))
                  orderlist1 = orederMap1.get(position);

              if (orderlist1.isEmpty()){

              }
            else{
              tv.setBackgroundColor(Color.CYAN);
             }
          } 
           else {
            v =  convertView;
        }
        /**
         * Code for changing background if data is content
         */
        return v;
    }

这是每 20 秒更新一次 gridview 的代码
//=============刷新gridview ==============

  private class UpdateGridview extends AsyncTask<Context, Integer, String>
     {

    @Override
    protected String doInBackground(Context... params) {

        int i = 0;
        while (i < 10) {
            try {
                Thread.sleep(30000);
                Message msg = handler.obtainMessage();
                handler.sendMessage(msg);

                i++;
            } catch (Exception e) {
                Log.i("makemachine", e.getMessage());
            }
        }
        return "COMPLETE!";
    }

        private final Handler handler = new Handler() {
            public void handleMessage(Message msg) {

                getCurrent_orderlist_StatusFromServer();
                gridadapter.notifyDataSetChanged();

                System.out
                        .println("i  called notifyDataSetChanged()=======================");
            }
        };


        // -- gets called just before thread begins
        @Override
        protected void onPreExecute() 
        {
                Log.i( "makemachine", "onPreExecute()" );
                super.onPreExecute();

        }


        @Override
        protected void onProgressUpdate(Integer... values) 
        {
                super.onProgressUpdate(values);

        }

        // -- called if the cancel button is pressed
        @Override
        protected void onCancelled()
        {
                super.onCancelled();
               Log.i( "makemachine", "onCancelled()" );

        }

        // -- called as soon as doInBackground method completes
        // -- notice that the third param gets passed to this method
        @Override
        protected void onPostExecute( String result ) 
        {
                super.onPostExecute(result);
                Log.i( "makemachine", "onPostExecute(): " + result );

        }

Answer 1

之所以会这样，是因为您给出了 if 条件。这是因为第一次只有 convertview 被分配。它第二次没有进入 if 条件。而且你必须执行 if 中的代码。所以只要去掉 if 条件，它就会正常工作。