notifyDataSetChanged not working

adapter, android, listview

Solution

just change your `myList` and call `adapter.notifyDataSetChanged()` don't set a new adapter each time.

In the constructor of your custom adapter do call `super` that takes ArrayList as the argument.

call this:

public MiAdaptadorListaComercios(Context c,List<Comercio> myList){
    super(c,0,myList);
    this.contexto = c;
    this.myList = myList;
}

You can keep the adapter as it is the problem is in this line:

myList = filteredList;

instead of changing the reference you should change the list itself.

myList.clear();
myList.addAll(filteredList);

By doing this you will loose your original list to I would suggest keeping another list call ed originalList which will have the complete list and initialize myList in onCreate by:

myList=new ArrayList(originalList);

so every time you want to re-set just call:

myList.clear();
myList.addAll(originalList);

and in

    for(Comercio co : originalList)
            {
                if(co.getName().contains(filer))
                {
                    filteredList.add(co);
                }
            }

Problem

My app uses a `MultiColumnListView` (https://github.com/huewu/PinterestLikeAdapterView) and as its name says it helps creating multi column list views. The library is great, but as they specify, filtering is not supported. So I am trying to create my own text-filter functionality with a simple edit text. Finally I achieve to filter the list but now I need to refresh the listView and recall the setAdapter because I pass the list on it. ``` MyAdapter adapter = new MyAdapter(this,myList); listView.setAdapter(adapter); ``` When I execute `listView.invalidateViews()` or `adapter.notifyDataSetChanged()` the listView is refreshed but with the old list. Which is the best way of recalling the setAdapter? or maybe is another way of doing this.. Thanks in advance EDIT: ``` //Method that filters the list Log.i("On filter myList.size()",""+myList.size()); adapter.notifyDataSetChanged(); //on the Adapter Log.i("On Adapter myList.size()",""+myList.size()); ``` Log: Adapter Class: ``` public class MiAdaptadorListaComercios extends BaseAdapter{ //Textview and Imageviews declarations private Context contexto; private List<Comercio> myList; public MiAdaptadorListaComercios(Context c,List<Comercio> myList){ this.contexto = c; this.myList = new ArrayList<Comercio>(); this.myList = myList; } @Override public int getCount() { Log.i("On Adapter myList.size()",""+listaComercios.size()); return myList.size(); } @Override public Object getItem(int position) { return myList.get(position); } @Override public long getItemId(int arg0) { // TODO Auto-generated method stub return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { View view =null; if(convertView == null) { LayoutInflater inflater = (LayoutInflater) contexto.getSystemService(Context.LAYOUT_INFLATER_SERVICE); view = inflater.inflate(R.layout.list_cell, null); } else{ view = convertView; } //set views Texteviews text,font etc... return view; } ``` } Activity Class: ``` public class ListaComercio extends Activity { private MultiColumnListView mAdapterView = null; EditText searchBar; private ArrayList<Comercio> myList; private ArrayList<Comercio> filteredList; MyAdapter adapter; public ListaComercio(){ myList = new ArrayList<Comercio>(); filteredList = new ArrayList<Comercio>(); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.lista_comercios); mAdapterView = (MultiColumnListView) findViewById(R.id.list); adapter = new MyAdapter(ListaComercio.this,myList); mAdapterView.setAdapter(adapter); searchBar.setOnEditorActionListener(new TextView.OnEditorActionListener() { @Override public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { if (actionId == EditorInfo.IME_ACTION_SEARCH) { CharSequence filer = v.getText(); for(Comercio co : myList) { if(co.getName().contains(filer)) { filteredList.add(co); } } myList = filteredList; Log.i("On filter myList.size()",""+myList.size()); myList.clear(); adapter.notifyDataSetChanged(); //mAdapterView.invalidateViews(); return true; } return false; } }); } } ```

Original source

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