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Append Data Load More Listview


Append Data Load More Listview

By : jhrozo
Date : November 18 2020, 11:13 AM
To fix this issue In your LoadData AsyncTask, in onPostExecute, you always re-create the adapter with new data received, so it does not append the existing data.
What you need to do is add a method to InfoTeacher adapter to append new items to your existing data, and then call that method from onPostExecute if the adapter already exists (adapter != null).
code :


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Getting my load more button to stop multiplying and append to the bottom of my listview

Getting my load more button to stop multiplying and append to the bottom of my listview


By : Michal Řeřicha
Date : March 29 2020, 07:55 AM
I hope this helps . From your screenshots it appears as though the handlePerson function is adding more "people" to the list without moving the "Load More" button to the bottom, which will account for having list-items below the "Load More" button.
code :
function handlePerson(index, value) {
    var output = '';

    // Add these returns to listview
    output += '<li>' + '<h3>' + value.name + '</h3>' + '<p>' + value.height + '</p>' + '<p>' + value.weight + 'lbs.' + '</p>' + '</li>';
    var $loadMore = $('#listview').children('.load-more');
    $('#listview').append(output).append($loadMore).listview('refresh');
}
function browseSuccess(browseResults){
    $.mobile.changePage('#results');
    restartLine = browseResults.restartLine;
    var out = [];
    jQuery.each(browseResults.people,function (i, v) {
        out.push(handlePerson(i, v));
    });
    var $loadMore = $('#listview').children('.load-more');
    $('#listview').append(out.join('')).append($loadMore).listview('refresh');
}

function handlePerson(index, value) {
    return '<li>' + '<h3>' + value.name + '</h3>' + '<p>' + value.height + '</p>' + '<p>' + value.weight + 'lbs.' + '</p>' + '</li>';
}
Android listview in listview append data

Android listview in listview append data


By : Werner Iberl
Date : March 29 2020, 07:55 AM
like below fixes the issue Use ExpandableListView.
Initially populate the parent ListView and then when currency_values list item is clicked, you can expand it to populate the child ListView.
How to append new Listview data to infinite scrolling ListView

How to append new Listview data to infinite scrolling ListView


By : user2710546
Date : March 29 2020, 07:55 AM
it helps some times This happen because you do not append with the previous list.
your code should look like this
code :
    public class MyTask extends AsyncTask> {

        @Override 
        protected void onPreExecute() { 
            super.onPreExecute(); 
        } 

        @Override 
        protected List<City> doInBackground(String... urls) { 
            try { 
                List<City> city_new = serviceProvider.getService().getCities(); 
    if(city_new  != null && city_new.size() > 0 ){
    city.addAll(city_new  )
    }
            } catch (IOException e) { 
                e.printStackTrace(); 
            } 
            return city; 
        } 

        @Override 
        protected void onPostExecute(List<City> organization) { 
            adapter = new CityListAdapter(getActivity(), city); 
            listView.setAdapter(adapter); 
            // Create an OnScrollListener 
            listView.setOnScrollListener(new AbsListView.OnScrollListener() { 

                @Override 
                public void onScrollStateChanged(AbsListView view, 
                                                 int scrollState) { // TODO Auto-generated method stub 
                    int threshold = 1; 
                    int count = listView.getCount(); 

                    if (scrollState == SCROLL_STATE_IDLE) { 
                        if (listView.getLastVisiblePosition() >= count 
                                - threshold) { 
                            // Execute LoadMoreDataTask AsyncTask 
                            new LoadMoreDataTask().execute(); 
                        } 
                    } 
                } 
            }); 
        } 
    } 

    public class LoadMoreDataTask extends AsyncTask<String, Void, List<City>> {
        @Override 
        protected List<City> doInBackground(String... urls) {
            try { 
                // web service request 
                List<City> city_new = = serviceProvider.getService().getNextCities(); 
if(city_new  != null && city_new.size() > 0 ){
city.addAll(city_new  )
}
            } catch (IOException e) {
                e.printStackTrace();
            } 
            return city; 
        } 

        @Override 
        protected void onPostExecute(List<City> organization) {
            int position = listView.getLastVisiblePosition();
            adapter = new CityListAdapter(getActivity(), city); 
            listView.setAdapter(adapter); 
            adapter.notifyDataSetChanged(); 
            listView.setSelectionFromTop(position, 0);
            mProgressDialog.dismiss(); 
        } 
    } 
    }
Set listview item button to load specific url without declaring final listview data?

Set listview item button to load specific url without declaring final listview data?


By : lakshmi
Date : March 29 2020, 07:55 AM
Hope that helps So I was having an issue before with the URL's not loading correctly, and I've fixed that, but now I can't figure out how to set OnClick to load a specific URL since I need to declare it final, but I can't otherwise it won't work properly. , In getView method of adapter, use setTag on Button view like this:
code :
     holder.website.setTag(data[position].url);
@Override
public void onClick(View v) {

    if (v.getId() == R.id.deityWebsite) {

        String url = (String) v.getTag();
        //implement your code here with url
    }
}
UWP listview load more data when listview scrolling reaches to last item / infinite scrolling listview

UWP listview load more data when listview scrolling reaches to last item / infinite scrolling listview


By : Saif Saraçen
Date : March 29 2020, 07:55 AM
it fixes the issue Ok, it's a bit different, It uses the ListView's incremental loading functionality to create a infinite scrolling list.
This means you won't have as much control of loading the data as you assumed in your question, but still I think it will suit your needs:
code :
<Page
    x:Class="App6.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:App6"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DataContext="{d:DesignInstance local:ViewModel, IsDesignTimeCreatable=True}">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <ListView ItemsSource="{Binding Items}" 
                  DataFetchSize="1" 
                  IncrementalLoadingTrigger="Edge" 
                  IncrementalLoadingThreshold="5">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding Text}"></TextBlock>
                    </StackPanel>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
    </Grid>
</Page>
public class IncrementalLoadingCollection : ObservableCollection<Item>, ISupportIncrementalLoading
{
    uint x = 0; //just for the example
    public bool HasMoreItems { get { return x < 10000; } } //maximum

    //the count is the number requested
    public IAsyncOperation<LoadMoreItemsResult> LoadMoreItemsAsync(uint count)
    {
        return AsyncInfo.Run(async cancelToken =>
        {
            //here you need to do your loading
            for (var c = x; c < x + count; c++)
            {
                //add your newly loaded item to the collection
                Add(new Item()
                {
                    Text = c.ToString()
                });
            }

            x += count;
            //return the actual number of items loaded (here it's just maxed)
            return new LoadMoreItemsResult { Count = count };
        });
    }
}
//the type which is being used to display the data
//you could extend it to use images and stuff
public class Item
{
    public string Text { get; set; }
}
public class ViewModel
{
    public ViewModel()
    {
        Items = new IncrementalLoadingCollection();
    }
    //using the custom collection: these are your loaded items
    public IncrementalLoadingCollection Items { get; set; }
}
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
    public MainPage()
    {
        this.InitializeComponent();
        DataContext= new ViewModel(); //using a viewmodel as data context           
    }
}
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