在我的应用程序中，我使用自定义列表视图适配器。在列表视图项中，我添加了另一个布局。因为在我的服务中，一个订单有任意数量的订单商品。为了显示订单项目，我将下面的订单商品布局添加到自定义列表视图item.it工作正常。但滚动列表视图时，数据会发生变化。
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();
}
}
}
}
答案 0 :(得分：99)
在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;
}
答案 1 :(得分：1)
我遇到了同样的问题，然后链接解决了我的问题;
https://stackoverflow.com/a/36738935/3341089
基本上，您应指定项目类型，然后通过getItemViewType(int position)和getViewTypeCount()覆盖方法重新配置适配器。
如果你查看上面的链接，你会得到它。
答案 2 :(得分：0)
您正在使用两个数组 - “bpData”和“opData”，只有在特定条件下使用“opData”时才会重置。
这是一个糟糕的设计。你需要一个数组 - 如果“opData”依赖于“bpData”，那么使它成为“bpData”的变量。
或者写点东西来同步两者。否则，您不知道显示器的工作方式。
答案 3 :(得分：0)
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
适合我的作品