在我的Android应用程序中，我使用带有索引值的webservices（例如。
https://mysampleurl.com/sampledata?username=""&&password=""&&startindex="1"&&endindex="10"）
并通过BaseAdapter将提取的数据传递给arraylist，并在listview.
当listview到达底部时，使用asynctask我会增加索引值（例如。
https://mysampleurl.com/sampledata?username=""&&password=""&&startindex="11"&&endindex="20")。
我将收到数据并将其存储在arraylist中，然后继续。
但是当我将数组列表值传递给适配器时，它会覆盖现有数据，而不是附加以前的值。
@Override
public View getView(final int position, View convertView, ViewGroup parent)
{
System.out.println("position:"+position);
}
我在其他一些例子中检查了上面的代码，起初它给出的值如1,2，..... 10。在第二次它给1,2,3，..... 20。但在我的应用程序中，它总是返回值达1,2,3 ...... 10。
有人可以告诉我我做了什么错误吗？
public ContentListAdapter (Context context, ArrayList<CommonData> contentList)
{
ctxt = context;
this.ContentList = contentList;
contentListRowInflater = LayoutInflater.from(context);
mSelectedItemsIds=new SparseBooleanArray();
checkBoxState=new boolean[contentList.size()];
}
@Override
public int getCount() {
return (filteredContentList == null)?0:filteredContentList.size();
}
@Override
public Object getItem(int position) {
return filteredContentList.get(position);
}
@Override
public long getItemId(int position)
{
return position;
}
Here only i pass the values and check the position
@Override
public View getView(final int position, View convertView, ViewGroup parent)
{
ContentListActivity.adapterFlag = false;
DocumentListViewHolder viewHolder = null;
if (convertView == null || convertView.getTag() == null) {
convertView = contentListRowInflater.inflate(
R.layout.content_list_row, null);
viewHolder = new DocumentListViewHolder();
viewHolder.ivDocumentdoctypeIcon = (ImageView) convertView.findViewById(R.id.ivDocumentTypeIcon);
viewHolder.tvDocumentTitle = (TextView) convertView.findViewById(R.id.tvDocumentTitle);
viewHolder.tvsubitemcount = (TextView) convertView.findViewById(R.id.tvsubitemcount);
viewHolder.ivarrowlauncher = (ImageView)convertView.findViewById(R.id.arrowlauncher);
viewHolder.checkboxselection=(CheckBox)convertView.findViewById(R.id.checkboxdeletion);
checkBoxSelection=viewHolder.checkboxselection;
viewHolder.checkboxselection.setChecked(checkBoxState[position]);
viewHolder.ivarrowlauncher = (ImageView)convertView.findViewById(R.id.arrowlauncher);
mainlayoutrl = (RelativeLayout)convertView.findViewById(R.id.clrrlmain);
sublayoutll = (LinearLayout)convertView.findViewById(R.id.clrowll);
arrowlayoutll = (LinearLayout)convertView.findViewById(R.id.clarrowll);
final Context context = ContentListActivity.contentListActivity;
if(viewHolder.checkboxselection.isChecked()) {
mainlayoutrl.setBackgroundColor(ctxt.getResources().getColor(R.color.checkboxrowselect));
sublayoutll.setBackgroundColor(ctxt.getResources().getColor(R.color.checkboxrowselect));
arrowlayoutll.setBackgroundColor(ctxt.getResources().getColor(R.color.checkboxrowselect));
} else {
mainlayoutrl.setBackgroundColor(ctxt.getResources().getColor(R.color.white));
sublayoutll.setBackgroundColor(ctxt.getResources().getColor(R.color.white));
arrowlayoutll.setBackgroundColor(ctxt.getResources().getColor(R.color.white));
}
sublayoutll.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (Config.networkConnectionCheck(context)) {
if(filteredContentList.get(position).type.equalsIgnoreCase("FOLDER")) {
ContentListActivity.ListarrowClick(position+1,context);
} else if (refreshFlag == false) {
ContentListActivity.oldviewContent(position+1,context);
} else
} else {
ContentListActivity.oldofflineViewContent(position+1,context);
}
}
});
arrowlayoutll.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v) {
ContentListActivity.ListarrowClick(position+1,context);
}
});
viewHolder.ivfilesDownload=(ImageView)convertView.findViewById(R.id.document_list_row_download_imageview);
//newly added by venkat
viewHolder.ivfilesdownloaded=(ImageView)convertView.findViewById(R.id.document_list_row_downloaded_imageview);
viewHolder.tvDocumentDescription=(TextView)convertView.findViewById(R.id.tvdocumentdescription);
} else {
viewHolder = (DocumentListViewHolder) convertView.getTag();
}
viewHolder.tvDocumentTitle.setText(filteredContentList.get(position).name);
String desc = filteredContentList.get(position).versiondescription;
if (desc != null) {
viewHolder.tvDocumentDescription.setText(filteredContentList
.get(position).versiondescription);
}
String doctype = filteredContentList.get(position).type;
String subitemcount = filteredContentList.get(position).subitemcount;
if (doctype.equalsIgnoreCase(ctxt.getResources()
.getString(R.string.pdf))) {
viewHolder.ivDocumentdoctypeIcon
.setImageResource(R.drawable.pdfbigicon);
} else if (doctype.equalsIgnoreCase(ctxt.getResources().getString(
R.string.swf))) {
viewHolder.ivDocumentdoctypeIcon
.setImageResource(R.drawable.flashbigicon);
} if(doctype.equalsIgnoreCase(ctxt.getResources().getString(
R.string.folder)))
{
viewHolder.ivarrowlauncher.setVisibility(View.INVISIBLE);
}
if (filteredContentList.get(position).isupdateavailable
.equalsIgnoreCase(ctxt.getResources().getString(
R.string.update_false_status))) {
} else if (filteredContentList.get(position).isupdateavailable
.equalsIgnoreCase(ctxt.getResources().getString(
R.string.update_true_status))) {
WebAPI webapi = new WebAPI(ctxt);
if (LoginHandler.arraylistdata.size() == 1) {
user_id = LoginHandler.arraylistdata.get(0)
.getUserid();
org_id = LoginHandler.arraylistdata.get(0)
.getOrgId();
} else {
user_id = LoginHandler.arraylistdata.get(
OrgListActivity.selected_org_pos)
.getUserid();
org_id = LoginHandler.arraylistdata.get(
OrgListActivity.selected_org_pos)
.getOrgId();
}
LoginDatabaseHandler loginDBHandler = new LoginDatabaseHandler(
ctxt);
loginDBHandler.open();
int toglState = loginDBHandler.checkOffToggleState(
user_id, org_id, filteredContentList
.get(position).dockey.toString());
}
} else
versionUpdate(position, ctxt);
}
});
}
/*ends*/
return convertView;
}