CODEWITHSUNDEEP
javaandroidarraylisthashmapadapter
Umbp
Umbp

Reputation: 45

show a specific item from a hashmap in a listview

Is there a way to show only a specific element from ArrayList using an ArrayAdapter

   final ListView lst = (ListView)  findViewById(R.id.listView);

        ArrayList<HashMap<String,String>> list = new ArrayList<HashMap<String,String>>();

            for(int j=0;j<result.length();j++) {
                try {


                    HashMap<String,String> map = new HashMap<String,String>();
                    map.put("title", result.getJSONObject(j).getString("title"));
                    map.put("url", result.getJSONObject(j).getString("url"));


                    list.add(map);



                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

        ArrayAdapter ad= new ArrayAdapter(List.this, android.R.layout.simple_list_item_1,list);

        lst.setAdapter(ad);

in other words: I want to show only title element in a ListView.

Do I need to create a CustomAdapter?

Upvotes: 2

Views: 101

Answers (4)

akhil batlawala
akhil batlawala

Reputation: 1066

if you need String.

String title=(String)map.get("title");

if you need object.

Object title=map.get("title");

Hope it works. Thanks

Upvotes: 0

Oleksandr
Oleksandr

Reputation: 6356

Yes, you have to create a custom adapter in this case or you can simple create an additional list and use it for ArrayAdapter.

You can also create extended List for you purposes and pass HashMap into it

Upvotes: 0

Blackbelt
Blackbelt

Reputation: 157447

you can use a SimpleAdapter. E.g.

SimpleAdapter ad= new SimpleAdapter(List.this, list, android.R.layout.simple_list_item_1, new String[] {"title"}, new int[] {android.R.id.textview1});

the String[] contains the key you want to use to retrieve the values to set in your ui

Upvotes: 1

Ravi
Ravi

Reputation: 35559

There are 2 ways to do it :

  1. By creating custom adapter

  2. By creating another arraylist with just value you want to show. like below :

    ArrayList<String> listTitle = new ArrayList<String>();
for(int j=0;j<result.length();j++) {
        try {


            HashMap<String,String> map = new HashMap<String,String>();
            map.put("title", result.getJSONObject(j).getString("title"));
            map.put("url", result.getJSONObject(j).getString("url"));
            listTitle.add(result.getJSONObject(j).getString("title"));

            list.add(map);



        } catch (Exception e) {
            e.printStackTrace();
        }
    }

ArrayAdapter ad= new ArrayAdapter(List.this, android.R.layout.simple_list_item_1,listTitle);

Upvotes: 0

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