Question

I have a listview for my menu with a baseadapter.

My Activity :

listView_menu = (ListView) findViewById(R.id.listView_menu);
model_category = new Model_Category(context);
listView_menu.setAdapter(new BaseAdapter_Menu(context, model_category.GetAllDifferentCategory()));
listView_menu.setOnItemClickListener(new OnItemClickListener() 
    {
        @Override
        public void onItemClick(AdapterView<?> arg0, View view, int position, long arg3)
        {
            view.setSelected(true);
        }
    });
listView_menu.setSelection(0);

My getView method of BaseAdapter_Menu (extends BaseAdapter) :

@Override
public View             getView(int position, View convertView, ViewGroup parent)
{
    View                rowView = convertView;

    if (rowView == null)
    {
        rowView = this.inflater.inflate(R.layout.customitemlistview_menu, null);
        ViewHolder viewHolder = new ViewHolder();
        viewHolder.category = (TextView) rowView.findViewById(R.id.category_menu);
        rowView.setTag(viewHolder);
    }
    ViewHolder holder = (ViewHolder)rowView.getTag();
    holder.category.setText(this.data.get(position));
    return (rowView);
}

Each item has a selector for its background with 2 differents background depending of its state (SELECTED or NOT).

When I click on an item in my listview, I set to my view item.setSelected("true").

So when I click, the item’s background changes, but how to change the background of the first item of my listview without clicking on it.
I have already tried ‘listView_menu.setSelection(0)’ but it doesn’t work.

Answer 1

I found the solution ! 🙂

In my onCreate I appy this code :

listView_menu.setAdapter(new BaseAdapter_Menu(context, model_category.GetAllDifferentCategory()));
    listView_menu.setOnItemClickListener(new OnItemClickListener() 
    {
        @Override
        public void onItemClick(AdapterView<?> listView, View view, int position, long id)
        {
            ((BaseAdapter_Menu) listView_menu.getAdapter()).setPositionSelected(position);
        }
    });

In my BaseAdater_Menu :

I create private int PositionSelected = 0;

I add this method

public void setPositionSelected(int position)
{
    PositionSelected = position;
    this.notifyDataSetChanged();
}

And I override the getView method

public View getView(int position, View convertView, ViewGroup parent)
{
    View rowView = convertView;

    if (rowView == null)
    {
        rowView = this.inflater.inflate(R.layout.customitemlistview_menu, null);
        ViewHolder viewHolder = new ViewHolder();
        viewHolder.category = (TextView) rowView.findViewById(R.id.category_menu);
        rowView.setTag(viewHolder);
    }
    ViewHolder holder = (ViewHolder)rowView.getTag();
    holder.category.setText(this.data.get(position));
    if (position == PositionSelected)
        rowView.setBackgroundResource(R.drawable.item_menu_selected_background);
    else
        rowView.setBackgroundResource(R.drawable.item_menu_background);
    return (rowView);
}

Thank you for your help 🙂