ListView Not Updating After Filtering

Question

I have a ListView (with setTextFilterEnabled(true)) and a custom adapter (extends ArrayAdapter) which I update from the main UI thread whenever a new item is added/inserted.

Answer 1

First of all I would like to mention, that @jhie's answer is very good. However those facts did not really solve my problem. But with the help of knowledge of how the internally used mechanism worked, I could write it my own filtering function:

public ArrayList listArray = new ArrayList<>();
public ArrayList tempListArray = new ArrayList<>();
public ArrayAdapter tempAdapter;
public String currentFilter;

in onCreate:

// Fill my ORIGINAL listArray;
listArray.add("Cookies are delicious.");

// After adding everything to listArray, I add everything to tempListArray
for (String element : listArray){
    tempListArray.add(element);
}

// Setting up the Adapter...
tempAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, tempListArray);
myListView.setAdapter(tempAdapter);

Filtering:

// Defining filter functions
public void customFilterList(String filter){
        tempListArray.clear();
        for (String item : listArray){
            if (item.toLowerCase().contains(filter.toLowerCase())){
                tempListArray.add(item);
            }
        }
        currentFilter = filter;
        tempAdapter.notifyDataSetChanged();
    }
    public void updateList(){
        customFilterList(currentFilter);
    }

I used it for implementing a search function into my list.

The big advantage: You have much more filtering power: at customFilterList() you can easily implement the usage of Regular Expressions or use it as a case sensitive filter.

Instead of notifyDataSetChanged you would call updateList() .

Instead of myListView.getFilter().filter('filter text') you would call customFilterList('filter text')

At the moment this is only working with one ListView. Maybe - with a bit of work - you could implement this as a Custom Array Adapter.