列表视图项目滚动机器人时候改变位置？ [英] List view items changes position when scrolling android?
本文介绍了列表视图项目滚动机器人时候改变位置？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在我的应用程序使用的自定义列表视图的适配器。在列表视图项我又增加了布局。因为在我服务的一个订单有任何数量订单的产品。对于显示订单项目我添加了订单项目布局下面的自定义列表视图item.it工作正常。但是，当滚动列表视图中的数据被更改。
适配器类：
公共类previousDataAdapter延伸BaseAdapter {
ArrayList的＆LT; previousOrderData＆GT; bpData;
私人的ArrayList＆LT; previousOrderData＆GT; ArrayList的;
ArrayList的＆LT; OrderItemData＆GT; opData;
私人的ArrayList＆LT; OrderItemData＆GT; arraylist1;
私人活动的活动;
私人LayoutInflater充气;
字符串g_orderid;
数据库处理器分贝;
共享preferences m_shared preference;
共享preferences.Editor m_editor;
ArrayList的＆LT;字符串＆GT; circless =新的ArrayList＆LT;字符串＆GT;（）;
公共previousDataAdapter（活动活动，ArrayList的＆LT; previousOrderData＆GT; bpData，ArrayList的＆LT; OrderItemData＆GT; opdata）{
// TODO自动生成构造函数存根
this.activity =活动;
this.bpData = bpData;
this.opData = opdata; // K +
// this.opData = bpData.get（）// opdata;
充气= LayoutInflater.from（活动）;
DB =新的数据库处理器（活动）;
}
@覆盖
公众诠释getCount将（）{
// TODO自动生成方法存根
返回bpData.size（）;
}
@覆盖
公共对象的getItem（INT位置）{
// TODO自动生成方法存根
返回bpData.get（位置）;
}
@覆盖
众长getItemId（INT位置）{
// TODO自动生成方法存根
返回0;
}
私人诠释lastPosition = -1;
@覆盖
公共查看getView（最终诠释的立场，观点convertView，ViewGroup中父）{
字样custom_regular = Typeface.createFromAsset（activity.getAssets（）
字体/ OpenSans-Regular.ttf）;
m_shared preference = activity.getShared preferences（save_details，activity.MODE_PRIVATE）;
m_editor = m_shared preference.edit（）;
//的String []月= {一月，二月，月，四月，五一，君，七月，八月，SEP，十月，十一月，十二月};
//最后查看视图;
最后ViewHolder viewHolder;
如果（convertView == NULL）{
viewHolder =新ViewHolder（）;
convertView = inflater.inflate（R.layout previousorders_listitem，NULL）;
viewHolder.date =（TextView中）convertView.findViewById（R.id.date）;
viewHolder.orderid =（TextView中）convertView.findViewById（R.id.orderid）;
viewHolder.amount =（TextView中）convertView.findViewById（R.id.amount）;
viewHolder.status =（TextView中）convertView.findViewById（R.id.status）;
viewHolder.ordersinfo =（的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 =（的LinearLayout）convertView.findViewById（R.id.ll_individuvalitem）;
// convertView =图。
convertView.setTag（viewHolder）;
}其他 {
viewHolder =（ViewHolder）convertView.getTag（）;
}
viewHolder.date.setText（bpData.get（位置）.getDate（））;
viewHolder.orderid.setText（bpData.get（位置）.getOrdername（））;
viewHolder。 amount.setText（RS+ bpData.get（位置）.getAmount（））;
viewHolder。 status.setText（bpData.get（位置）.getStatus（））;
viewHolder.ordersinfo.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
g_orderid = bpData.get（位置）.getOrderid（）;
Log.v（TAG_ORDERIDADAPTER，+ g_orderid）;
新GetReorder（）执行（WebUrl.RechargeServiceURL +APP_Reorder）;
}
}）;
//Log.d("size:",opData.size()+）;
如果（opData =空＆安培;！＆安培; opData.size（）大于0）{opData.clear（）;}
opData = bpData.get（位置）.getOrderItemDataList（）; //
如果（opData.size（）大于0）{
viewHolder.ll_individuvalitem.removeAllViews（）;
的for（int i = 0; I＆LT; opData.size（）;我++）{
// Log.v（标签号循环，+ opData.get（I）.getNumber（））;
查看ItemView控件= inflater.inflate（R.layout previousorders_list_single_items，NULL）;
TextView的数=（TextView中）itemview.findViewById（R.id.Number）;
TextView的RechargeAmount =（TextView中）itemview.findViewById（R.id.RechargeAmount）;
TextView的Rechargestatus =（TextView中）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控件）;
}
}
返回convertView;
}
类ViewHolder {
TextView的日期，tx_month，订单ID，数量，状态;
的LinearLayout ll_individuvalitem，ordersinfo;
}
私有类GetReorder扩展的AsyncTask＆LT;字符串，无效的JSONObject＆GT; {
/ *字符串mJourneyDate;
公众的GetData（字符串pJourneyDate）{
this.mJourneyDate = pJourneyDate;
} * /
@覆盖
在preExecute保护无效（）{
super.on preExecute（）;
// pDialog = ProgressDialog.show（getActivity（），，）;
}
@覆盖
受保护的JSONObject doInBackground（字符串... PARAMS）{
字符串响应;
尝试 {
HttpClient的HttpClient的=新DefaultHttpClient（）;
HttpPost httppost =新HttpPost（PARAMS [0]）;
名单＆LT;的NameValuePair＆GT;的NameValuePair =新的ArrayList＆LT;的NameValuePair＆GT;（4）;
nameValuePair.add（新BasicNameValuePair（订单ID，g_orderid））;
nameValuePair.add（新BasicNameValuePair（的DeviceID，m_shared preference.getString（DEVICEID，）））;
nameValuePair.add（新BasicNameValuePair（PlatformID，3））;
nameValuePair.add（新BasicNameValuePair（UserUniqueID，m_shared preference.getString（useruid，）））;
httppost.setEntity（新UrlEn codedFormEntity（的NameValuePair））;
HTT presponse的反响= httpclient.execute（httppost）;
HttpEntity httpEntity = responce.getEntity（）;
响应= EntityUtils.toString（httpEntity）;
Log.d（反应，反应）;
返回新的JSONObject（响应）;
}赶上（例外前）{
ex.printStackTrace（）;
}
返回null;
}
@覆盖
保护无效onPostExecute（JSONObject的结果）{
字符串状态;
super.onPostExecute（结果）;
// Log.v（TAG_RESULT，+导致）;
如果（结果！= NULL）{
尝试 {
意向意图=新的意图（活动，Payment_Actiivity.class）;
intent.putExtra（jsonfrompayment，result.toString（））;
Log.v（TAG_JSONPAY，+ result.toString（））;
activity.startActivity（意向）;
}赶上（例外五）{
e.printStackTrace（）;
}
} 其他 {
Toast.makeText（活动，出事了，Toast.LENGTH_LONG）.show（）;
}
}
}
}
解决方案
在适配器类中重写这两种方法
@覆盖
公众诠释getViewTypeCount（）{
返回getCount将（）;
}
@覆盖
公众诠释getItemViewType（INT位置）{
返回的位置;
}
In my application i used custom list view adapter. In the list view item i added another layout. because in my service one order have any number of order items. For showing the order items i added the order item layout below to custom list view item.it is working fine. but when scroll the list view the data is changed.
adapter class:
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();
}
}
}
}
解决方案
In your adapter class override these two methods
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
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