udinic / smallexamples Goto Github PK

Hey,

i've run into a problem by developing a list with expandable children. Each parent has a different amount of children, so that I use a ListView in the "toolbar"-layout and fill it dynamically with data in an adapter.
Now when I expand a group everything works fine, but when I try to collapse, it seems as if the parent item looses his clicklistener, because no click is detected. The child list view doesn't have an itemclicklistener yet, so it couldn't be intercepted by it...
Do you have an idea?

Step to reproduce

1. Tap on the 1st item to expand.
2. Scroll to the bottom
3. Scroll to the top
4. The 1st item expand state is gone.

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

        if (convertView == null) {
            convertView = getLayoutInflater().inflate(R.layout.list_item, null);
        }

        ((TextView)convertView.findViewById(R.id.title)).setText(getItem(position));

        // Resets the toolbar to be closed
        View toolbar = convertView.findViewById(R.id.toolbar);
        ((LinearLayout.LayoutParams) toolbar.getLayoutParams()).bottomMargin = -50;
        toolbar.setVisibility(View.GONE);

        return convertView;
    }

I guess this is cause by View re-using. However, if we remove the code

        toolbar.setVisibility(View.GONE);

We will encounter another set of problem

1. Tap on the 1st item to expand.
2. Scroll to the bottom
3. We will encounter some items other than 1st is expanded.

Hello Udinic,

Thanks a lot for your OpenSource contributions :-). I have been dealing with the ExpandAnimation, and it seems that the animation is not smooth the first execution (but completely fine on the subsequent ones). Is this a known issue?

If your list is long enough, and you expand one item (the first item, for instance), and then you scroll it down, at some point another item will appear expanded too.

Note that I am not forcing the items to be either expanded or collapsed, because I want to preserve their states when I scroll.

Since the viewholder can be reused, it needs to know whether the cell should be expanded or collapsed.

Does anyone know how to solve this?

Could you make a simple image preference please?

When you double tap a Item (for example, you pressed Item 1 but wanted to hit 2, so you click it immediately again to close) it destroys something.

After a double click, when you hit the item again it opens but closes immediately and won't open properly again.