java - 列表视图在第一次滚动时加载相同的数据两次，之后工作正常
问题描述
查看投诉活动：
在此我已经完成了调试，但我无法知道滚动后数据出现两次的原因。我什至通过邮递员检查了来自服务器的数据，但数据并没有重复，它的出现非常好，问题似乎出在前端，而我们正在通过适配器将数据放入滚动活动中。
public class ViewComplaintActivity extends AppCompatActivity implements AbsListView.OnScrollListener, View.OnClickListener {
TextView tv_notData;
List<Ticket> _data = new ArrayList<Ticket>();
ComplaintsAdapter settlementAdapter;
private String TAG = "ViewComplaintActivity";
private int visibleThreshold = 5;
private int currentPage = 0;
private int previousTotal = 0;
private boolean loading = true;
private boolean userScrolled = false;
a) 它是一个投诉活动，我们在其中显示通过适配器从服务器传输的数据。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_compliants);
ButterKnife.bind(this);
try {
settlementAdapter = new ComplaintsAdapter(ViewComplaintActivity.this, _data);
AlphaInAnimationAdapter animationAdapter = new AlphaInAnimationAdapter(settlementAdapter);
animationAdapter.setAbsListView(ll_complaint_list);
ll_complaint_list.setAdapter(animationAdapter);
getComplaints(Utility.getTerminalId(ViewComplaintActivity.this), 0);
ll_complaint_list.setOnScrollListener(this);
fab_raise_complaint.setOnClickListener(this);
fab_call_customer.setOnClickListener(this);
ivBackButton.setOnClickListener(this);
} catch (NullPointerException e) {
Log.e(TAG, e.toString());
} catch (Exception e) {
Log.e(TAG, e.toString());
}
}
private void getComplaints(String terminalid, int pagenumber) {
if (!NetworkConnection.isConnected(this)) {
Toast.makeText(this, R.string.no_connection, Toast.LENGTH_SHORT).show();
return;
}
progressBar.setVisibility(View.VISIBLE);
JsonObject jsonObject = new JsonObject();
jsonObject.addProperty("subIdentifier", terminalid);
jsonObject.addProperty("pageLimit", "10");
jsonObject.addProperty("lastPageIndex", "" + pagenumber);
IRetrofit iRetrofit = MoApplication.getInstance().getRetrofitOsTickets(this).create(IRetrofit.class);
Log.e(TAG,"jsonObject "+jsonObject);
iRetrofit.getAllTicket(jsonObject, new Callback<Response>() {
@Override
public void success(Response response, Response response2) {
progressBar.setVisibility(View.GONE);
try {
if (response.getStatus() == 200) {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getBody().in()));
String resultFromJson = bufferedReader.readLine();
/* Log.e(TAG, "resultFromJson " + resultFromJson);*/
GetTicketsResponse getSettlementsResDTO = new Gson().fromJson(resultFromJson, GetTicketsResponse.class);
switch (getSettlementsResDTO.getResCode()) {
case "0001":
if (null != getSettlementsResDTO.getTickets()) {
_data.addAll(getSettlementsResDTO.getTickets());
settlementAdapter.notifyDataSetChanged();
if (_data.isEmpty()) {
tv_notData.setVisibility(View.VISIBLE);
} else {
tv_notData.setVisibility(View.GONE);
}
} else {
Utility.showToast(ViewComplaintActivity.this, "No data found.");
}
break;
default:
Utility.showToast(ViewComplaintActivity.this, "Please try later.");
break;
}
}
} catch (NullPointerException e) {
Log.e(TAG, "" + e.toString());
} catch (Exception e) {
Log.e(TAG, "" + e.toString());
}
}
@Override
public void failure(RetrofitError error) {
if (Utility.parseException(error)){
Utility.mPosLogoutService((AppCompatActivity) ViewComplaintActivity.this);
}
progressBar.setVisibility(View.GONE);
}
});
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
/*Log.e(TAG,"one");*/
Log.e(TAG,"scrollState "+scrollState);
if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) {
userScrolled = true;
fab_call_customer.hide();
fab_raise_complaint.hide();
} else {
fab_call_customer.show();
fab_raise_complaint.show();
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
/*Log.e(TAG,"two");*/
view.getSelectedItemPosition();
if (userScrolled) {
Log.e(TAG,"loading "+loading);
if (loading) {
Log.e(TAG,"totalItemCount "+totalItemCount);
Log.e(TAG,"previousTotal "+previousTotal);
if (totalItemCount > previousTotal) {
loading = false;
previousTotal = totalItemCount;
currentPage++;
}
}
Log.e(TAG,"loadin after scroll "+loading);
if (!loading && ((totalItemCount - visibleItemCount) <= (firstVisibleItem + visibleThreshold))) {
getComplaints(Utility.getTerminalId(ViewComplaintActivity.this), currentPage);
loading = true;
}
}
else {
Log.e(TAG,"user is idle");
}
}
@Override
public void onBackPressed() {
super.onBackPressed();
finish();
}
@Override
public void onClick(View v) {
if (NetworkConnection.isConnected(this)) {
if (v == fab_raise_complaint) {
Utility.navigate(this, RaiseComplaintActivity.class);
} else if (v == fab_call_customer) {
Intent callIntent = new Intent(Intent.ACTION_DIAL);
callIntent.setData(Uri.parse("tel:" + Uri.encode(Constant.helplineNumber.trim())));
callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(callIntent);
} else if (v == ivBackButton) {
startActivity(new Intent(ViewComplaintActivity.this, HomeQrActivity.class));
finish();
}
} else {
Toast.makeText(this, R.string.no_connection, Toast.LENGTH_SHORT).show();
}
}
public class ComplaintsAdapter extends BaseAdapter {
private static String TAG = "ComplaintsAdapter";
List<Ticket> _data;
Context _c;
ViewHolder holder;
public ComplaintsAdapter(Context context, List<Ticket> getData) {
_data = getData;
_c = context;
}
@Override
public int getCount() {
Log.e(TAG,"_data.size()"+_data.size());
return _data.size();
}
@Override
public Object getItem(int position) {
Log.e(TAG,"_data.get(position)"+_data.get(position));
return _data.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
/*Log.e(TAG,"getData"+_data.toString());*/
try {
if (view == null) {
/*Log.e(TAG,"getData1"+_data.toString());*/
LayoutInflater li = (LayoutInflater)
_c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = li.inflate(R.layout.row_item_view_complaints,
null);
} else {
/*Log.e(TAG,"getData2"+_data.toString());*/
view = convertView;
}
holder = new ViewHolder();
holder.tv_ticketNo = (TextView)
view.findViewById(R.id.tv_ticketNo);
holder.tv_submitDate = (TextView)
view.findViewById(R.id.tv_submitDate); //ticket comments
holder.tv_updatedDate = (TextView)
view.findViewById(R.id.tv_updatedDate);//will act as ticket
last modified time
holder.tv_ticketStatus = (TextView)
view.findViewById(R.id.tv_ticketStatus); //ticket status open
or close
holder.tv_comment = (TextView)
view.findViewById(R.id.tv_comment);
holder.tv_subject = (TextView)
view.findViewById(R.id.tv_subject);
final Ticket ticket = _data.get(position);
holder.tv_ticketNo.setText("#" + ticket.getTicketNo());
holder.tv_submitDate.setText(Html.fromHtml("<b> Created On:
</b>" + Utility.dateReformatting("yyyy-MM-dd HH:mm:ss", "dd
MMM yyyy", ticket.getCreated())));
holder.tv_updatedDate.setText(Html.fromHtml("<b> Modified On:
</b>" + Utility.dateReformatting("yyyy-MM-dd HH:mm:ss", "dd
MMM yyyy", ticket.getModified())));
holder.tv_ticketStatus.setText(ticket.getStatus());
holder.tv_subject.setText(null != ticket.getSubject() && !ticket.getSubject().isEmpty() ? ticket.getSubject().trim().replace("|", "") : "NA"); //comments
if (null != ticket.getComment() && !ticket.getComment().isEmpty()) {
holder.tv_comment.setText(Html.fromHtml(ticket.getComment()));
holder.tv_comment.setVisibility(View.VISIBLE);
} else {
holder.tv_comment.setVisibility(View.GONE);
}
//holder.tv_comment.setText(null != ticket.getComment() && !ticket.getComment().isEmpty() ? ticket.getComment() : ""); //comments
if (ticket.getStatus().startsWith("Open"))
holder.tv_ticketStatus.setTextColor(_c.getResources().getColor(R.color.green_success));
else
Log.e(TAG,"getData4"+_data.toString());
holder.tv_ticketStatus.setTextColor(_c.getResources().getColor(R.color_color));
} catch (NullPointerException e) {
Log.e(TAG, e.toString());
} catch (Exception e) {
Log.e(TAG, e.toString());
}
return view;
}
public void set_data(List<Ticket> _data) {
this._data = _data;
}
static class ViewHolder {
public TextView tv_ticketStatus, tv_ticketNo, tv_submitDate,
tv_updatedDate, tv_comment, tv_subject;
}
}
解决方案
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