BaseAdapter Listview Filtering Android

In my Listview, I am having text and image and they are stored in ArrayList.

I am using BaseAdapter to display the list.

I want to use filter on the list based on text typed in EditText, but is not working.

My code is : adv is EditText

  adv.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int arg1, int arg2, int arg3) {
                // TODO Auto-generated method stub
                viewadapter.getFilter().filter(s);

            }

            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                    int arg3) {
                // TODO Auto-generated method stub

            }

            @Override
            public void afterTextChanged(Editable arg0) {
                // TODO Auto-generated method stub

            }
        });

And my BaseAdapter implements Filterable so getFilter method i开发者_运维技巧n that is:

@Override
        public Filter getFilter() {
            // TODO Auto-generated method stub
             if (mFilter == null) {
                    mFilter = new ArrayFilter();
                }
                return mFilter;
        }

and my ArrayFilter is:

 private class ArrayFilter extends Filter {
        @Override
        protected FilterResults performFiltering(CharSequence prefix) {
            FilterResults results = new FilterResults();

            if (mNames == null) {
                synchronized (mLock) {
                    mNames = new ArrayList<String>(mObjects);
                }
            }

            if (prefix == null || prefix.length() == 0) {
                synchronized (mLock) {
                    ArrayList<String> list = new ArrayList<String>(mNames);
                    results.values = list;
                    results.count = list.size();
                }
            } else {
                String prefixString = prefix.toString().toLowerCase();

                final ArrayList<String> values = mNames;
                final int count = values.size();

                final ArrayList<String> newValues = new ArrayList<String>(count);

                for (int i = 0; i < count; i++) {
                    final String value = values.get(i);
                    final String valueText = value.toString().toLowerCase();

                    // First match against the whole, non-splitted value
                    if (valueText.startsWith(prefixString)) {
                        newValues.add(value);
                    } else {
                        final String[] words = valueText.split(" ");
                        final int wordCount = words.length;

                        for (int k = 0; k < wordCount; k++) {
                            if (words[k].startsWith(prefixString)) {
                                newValues.add(value);
                                break;
                            }
                        }
                    }
                }

                results.values = newValues;
                results.count = newValues.size();
            }

            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            //noinspection unchecked
            mObjects = (List<String>) results.values;
            if (results.count > 0) {
                viewadapter.notifyDataSetChanged();
            } else {
                viewadapter.notifyDataSetInvalidated();
            }

    }
}

in that mNames is the ArrayList with which I want to filter the ListView.

and also enabled setTextFilterEnabled(true)., but filtering is not working.

Is this correct approach? what's wrong in it? if not, how to do that?

this the API demo example

public class SearchViewFilterMode extends Activity implements SearchView.OnQueryTextListener {

    private static final String TAG = "SearchViewFilterMode";

    private SearchView mSearchView;
    private ListView mListView;
    private ArrayAdapter<String> mAdapter;

    private final String[] mStrings = Cheeses.sCheeseStrings;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().requestFeature(Window.FEATURE_ACTION_BAR);

        setContentView(R.layout.searchview_filter);

        mSearchView = (SearchView) findViewById(R.id.search_view);
        mListView = (ListView) findViewById(R.id.list_view);
        mListView.setAdapter(mAdapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1,
                mStrings));
        mListView.setTextFilterEnabled(true);
        setupSearchView();
    }

    private void setupSearchView() {
        mSearchView.setIconifiedByDefault(false);
        mSearchView.setOnQueryTextListener(this);
        mSearchView.setSubmitButtonEnabled(false);
        mSearchView.setQueryHint(getString(R.string.cheese_hunt_hint));
    }

    public boolean onQueryTextChange(String newText) {
        if (TextUtils.isEmpty(newText)) {
            mListView.clearTextFilter();
        } else {
            mListView.setFilterText(newText.toString());
        }
        return true;
    }

    public boolean onQueryTextSubmit(String query) {
        return false;
    }
}