列表视图项目更改滚动android时的位置？
在我的应用程序我使用自定义列表视图适配器 在列表视图项目中，我添加了另一个布局。 因为在我的服务中，一个订单有任何数量的订单项目。 为了显示订单项目，我将下面的订单项目布局添加到自定义列表视图item.it工作正常。 但是当滚动列表视图数据被改变。
适配器类：
public class PreviousDataAdapter extends BaseAdapter { ArrayList<PreviousOrderData> bpData; private ArrayList<PreviousOrderData> arraylist; ArrayList<OrderItemData> opData; private ArrayList<OrderItemData> arraylist1; private Activity activity; private LayoutInflater inflater; String g_orderid; DatabaseHandler db; SharedPreferences m_sharedPreference; SharedPreferences.Editor m_editor; ArrayList<String> circless = new ArrayList<String>(); public PreviousDataAdapter(Activity activity, ArrayList<PreviousOrderData> bpData,ArrayList<OrderItemData> opdata) { // TODO Auto-generated constructor stub this.activity = activity; this.bpData = bpData; this.opData=opdata;//k? // this.opData=bpData.get()//opdata; inflater = LayoutInflater.from(activity); db = new DatabaseHandler(activity); } @Override public int getCount() { // TODO Auto-generated method stub return bpData.size(); } @Override public Object getItem(int location) { // TODO Auto-generated method stub return bpData.get(location); } @Override public long getItemId(int position) { // TODO Auto-generated method stub return 0; } private int lastPosition = -1; @Override public View getView(final int position, View convertView, ViewGroup parent) { Typeface custom_regular = Typeface.createFromAsset(activity.getAssets(), "fonts/OpenSans-Regular.ttf"); m_sharedPreference = activity.getSharedPreferences("save_details", activity.MODE_PRIVATE); m_editor = m_sharedPreference.edit(); //String[] months = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; //final View view; final ViewHolder viewHolder; if (convertView == null) { viewHolder = new ViewHolder(); convertView = inflater.inflate(R.layout.previousorders_listitem, null); viewHolder.date = (TextView) convertView.findViewById(R.id.date); viewHolder.orderid = (TextView) convertView.findViewById(R.id.orderid); viewHolder.amount = (TextView) convertView.findViewById(R.id.amount); viewHolder.status = (TextView) convertView.findViewById(R.id.status); viewHolder.ordersinfo=(LinearLayout)convertView.findViewById(R.id.previousorders); viewHolder.date .setTypeface(custom_regular); viewHolder.orderid.setTypeface(custom_regular); viewHolder.amount.setTypeface(custom_regular); viewHolder.status.setTypeface(custom_regular); viewHolder.ll_individuvalitem = (LinearLayout) convertView.findViewById(R.id.ll_individuvalitem); //convertView = view; convertView.setTag(viewHolder); }else { viewHolder = (ViewHolder) convertView.getTag(); } viewHolder.date.setText(bpData.get(position).getDate()); viewHolder.orderid.setText(bpData.get(position).getOrdername()); viewHolder. amount.setText("Rs."+bpData.get(position).getAmount()); viewHolder. status.setText(bpData.get(position).getStatus()); viewHolder.ordersinfo.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { g_orderid =bpData.get(position).getOrderid(); Log.v("TAG_ORDERIDADAPTER",""+g_orderid); new GetReorder().execute(WebUrl.RechargeServiceURL+"APP_Reorder"); } }); //Log.d("size:",opData.size()+""); if( opData!= null && opData.size() >0){opData.clear();} opData = bpData.get(position).getOrderItemDataList();// if(opData.size()>0){ viewHolder.ll_individuvalitem.removeAllViews(); for (int i = 0; i < opData.size(); i++){ // Log.v("TAG Number loop",""+opData.get(i).getNumber()); View itemview = inflater.inflate(R.layout.previousorders_list_single_items, null); TextView Number = (TextView)itemview.findViewById(R.id.Number); TextView RechargeAmount = (TextView)itemview.findViewById(R.id.RechargeAmount); TextView Rechargestatus = (TextView)itemview.findViewById(R.id.Rechargestatus); Number.setTypeface(custom_regular); RechargeAmount.setTypeface(custom_regular); Rechargestatus.setTypeface(custom_regular); Number.setText(opData.get(i).getNumber()); RechargeAmount.setText("Rs."+opData.get(i).getRechargeAmount()); Rechargestatus.setText(opData.get(i).getRechargestatus()); viewHolder.ll_individuvalitem.addView(itemview); } } return convertView; } class ViewHolder { TextView date, tx_month, orderid, amount,status; LinearLayout ll_individuvalitem,ordersinfo; } private class GetReorder extends AsyncTask<String, Void, JSONObject> { /*String mJourneyDate; public GetData(String pJourneyDate) { this.mJourneyDate = pJourneyDate; }*/ @Override protected void onPreExecute() { super.onPreExecute(); // pDialog = ProgressDialog.show(getActivity(), "", ""); } @Override protected JSONObject doInBackground(String... params) { String response; try { HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost(params[0]); List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(4); nameValuePair.add(new BasicNameValuePair("OrderID", g_orderid)); nameValuePair.add(new BasicNameValuePair("DeviceID", m_sharedPreference.getString("deviceId",""))); nameValuePair.add(new BasicNameValuePair("PlatformID", "3")); nameValuePair.add(new BasicNameValuePair("UserUniqueID", m_sharedPreference.getString("useruid",""))); httppost.setEntity(new UrlEncodedFormEntity(nameValuePair)); HttpResponse responce = httpclient.execute(httppost); HttpEntity httpEntity = responce.getEntity(); response = EntityUtils.toString(httpEntity); Log.d("response is", response); return new JSONObject(response); } catch (Exception ex) { ex.printStackTrace(); } return null; } @Override protected void onPostExecute(JSONObject result) { String Status; super.onPostExecute(result); // Log.v("TAG_RESULT",""+result); if (result != null) { try { Intent intent= new Intent(activity, Payment_Actiivity.class); intent.putExtra("jsonfrompayment",result.toString()); Log.v("TAG_JSONPAY",""+result.toString()); activity.startActivity(intent); } catch (Exception e) { e.printStackTrace(); } } else { Toast.makeText(activity, "something went wrong", Toast.LENGTH_LONG).show(); } } } } 在你的适配器类中重写这两个方法
@Override public int getViewTypeCount() { return getCount(); } @Override public int getItemViewType(int position) { return position; }
我有同样的问题，然后下面的链接解决了我的问题;
https://stackoverflow.com/a/36738935/3341089
基本上，你应该指定你的物品types，然后通过getItemViewType(int position)和getViewTypeCount()覆盖方法重新configuration适配器。
如果你看看上面的链接，你会得到它。
您正在使用两个数组 – “bpData”和“opData”，只有在特定条件下使用“opData”才能重置。
这是一个糟糕的devise。 您需要一个数组 – 如果“opData”依赖于“bpData”，则将其作为“bpData”的variables。
或者写一些东西来同步这两者。 否则，你不知道显示器是如何工作的。
