How to display unlimited list of data in Android ListView

Question

I really apologize if this question has already been answered. I have not found any appropriate solution for the issue i am facing.

I have large an amount of data.

Which is i want to display in List ,this data contains images,urls,title,type and price.

List of the items can be more than 10,000.

So if i am to implement Lazy Loading i need all the urls and rest of the data so that i can load the images at run time .

But how do i load the data which contains the urls, titles, type and price list?.

Or can i load first the 20 records by lazy loading. If yes then how?

Please suggest if you have an better approach to getting this thing done.

Thanks in advance.

yes, use pagination concept for loading data.https://github.com/nicolasjafelle/PagingListView — Sandeep Tiwari, May 14 '14 at 06:05
Look at my ans how to load image from url which provide you best way to load image in List in async manner http://stackoverflow.com/questions/19086192/setting-imageview-in-android/19086298#19086298 — Haresh Chhelana, May 14 '14 at 06:05
@SandeepTiwari i am able to import this project some xmls are missing — user3154663, May 14 '14 at 06:43
you can also see this, Hope it will help you. http://code.google.com/p/android-amazing-listview/ — Sandeep Tiwari, May 14 '14 at 06:47

score 1 · Answer 1 · edited May 23 '17 at 12:30

1

you can load 20 records at first and further more records when scrolling the ListView, by using ScrollListener for your ListView. check this answer

edited May 23 '17 at 12:30

Community

1
1

answered May 14 '14 at 06:15

Dharani Kumar

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score 1 · Answer 2 · answered May 14 '14 at 06:55

How i do this is that i load data (suppose 20 item) in ArrayList using AsyncTask then i set them to listview by using setAdapter and in getView method of ListAdapter as it reach to second last item i execute the AsyncTask again but this time instead of setAdapter i use adapter.notifyDataSetChanged(); how it should be is : getView method should be like this :

public View getView(int arg0, View arg1, ViewGroup arg2) 
{
    //your data inflater or set text...
    if(arg0==yourList.size()-1)
       {
           new YourAsyncTask().execute());
       }
}

AsyncTask Should Be Like this

//first initialize your list out of asynctask 
ArrayList<String> yourList=new ArrayList<String>();

class YourAsyncTask extends AsyncTask(Void,Void,Void)
 {
     protected Void doInBackground(String ... arg0) {
        // TODO Auto-generated method stub
            //get your data and add to arraylist
             yourlist.add(data);
      }

    protected void onPostExecute(Void result) {
             if(yourlist.size<20){
                   listview.setAdapter(yourAdapter);
                }
              else
                 {
                    yourAdapter.notifyDataSetChanged();
                 }
      }
}

score 0 · Answer 3 · answered May 14 '14 at 06:28

Its entirely depends on how you architect the app.One approach I would preffer is to make one request to server which will return you urls,titles data in json format.

{
    "dummy_info": "blah blah blah",
    "data": [
        {
            "url": "http://www.google.com",
            "title": "Sample",
            "type": "Education",
            "price": "50$"
        },
        {
            "url": "http://www.google.com",
            "title": "Sample",
            "type": "Education",
            "price": "50$"
        }
    ]
}

Once you get that particular data then you can use Android SwipeRefreshLayout OR Lazy List loading implementation to fetch data in batches.

thats what i am implementing. FIrst i want to get the data then load the image but the time scroll. But the if the data/list is too long then how it will work? — user3154663, May 14 '14 at 06:39

How to display unlimited list of data in Android ListView

3 Answers3