What adapter shall I use to use HashMap in a ListView

Question

I want to use HashMap for a list of items of Adapter for a ListView. I was going to use ArrayAdapter<> but I can\'t

Answer 1

Thanks for the answer longhairedsi

This comes with the following caveat, the order of the items is not guaranteed to be the same order you added them. Writing this example has made me realize; Don't use HashMap in an adapter :)

To get around this problem, use a LinkedHashMap instead.

public class HashMapAdapter extends BaseAdapter {
    private LinkedHashMap mData = new LinkedHashMap();
    private String[] mKeys;
    public HashMapAdapter(LinkedHashMap data){
        mData  = data;
        mKeys = mData.keySet().toArray(new String[data.size()]);
    }

    @Override
    public int getCount() {
        return mData.size();
    }

    @Override
    public Object getItem(int position) {
        return mData.get(mKeys[position]);
    }

    @Override
    public long getItemId(int arg0) {
        return arg0;
    }

    @Override
    public View getView(int pos, View convertView, ViewGroup parent) {
        String key = mKeys[pos];
        String Value = getItem(pos).toString();

        //do your view stuff here

        return convertView;
    }
}