未聚焦时更新ListView片段

Question

I'm working on a tablet application with a ListView fragment on the left, and some other views including a SearchView (essentially a TextView) on the right. When the SearchView is focused, I want to update the data of the listview, but I can't. If I notifyDataSetChanged on the UI thread, nothing happens. If I call setAdapter() again on my listview, the listview goes blank.

Only when I touch the listview again (it gets temporary focus again or something to cause getView() to be called on the adapter) does it get updated.

Anyone got an idea on how to fix this?

Min-Sdk and Target is 4.0.3.

Answer 1

Did you try to call your refresh routine using runOnUiThread() ?

Reform your objects list, bind to a new instance of your adapter, then call notifyDataSetChanged() and setAdapter() again in refresh routine would work.

Answer 2

您必须使用ViewHolder来处理ListView中的更新。

Answer 3

What now works for me is updating the data in the underlying adapter and then calling notifyDataSetChanged on that adapter, all from the UI thread.

I did not need to call setAdapter again on the listView.

Of course I had already tried all this before asking the question, so not sure what made it suddenly start working.

Answer 4

Call it inside the runOnUiThread method. Also add the new object to the adapter inside it.

Like that:

runOnUiThread(new Runnable() {
    @Override
    public void run() {
        chatListAdapter.add(message);
        chatListAdapter.notifyDataSetChanged();
    }
});