How to Write a Custom Filter for Listview with Arrayadapter

Custom Filtering ArrayAdapter in ListView

Your problem are this lines:

this.original = items;
this.fitems = items;

Items is the list you use for your ListView and putting it in two different variables does not make two different lists out of it. You are only giving the list items two different names.

You can use:

this.fitems = new ArrayList(items);

that should generate a new List and changes on this list will only change the fitems list.

Custom Filtering ArrayAdapter in ListView not working for imageview

You can have a look at this reference.

This is solved and working thing same as per your requirement.

Search Filtering List View

Go through with this link and let me know if you have still issues.

EDIT:

You have to maintain one dummy_drawable ArrayList same as drawable ArrayList and just keep your drawable ArrayList as base only and use dummy_drawable in your adapter.

Also update this dummy_drawable ArrayList from your FilterResults method. Like this:

dummy_drawable.clear();

for (int i = 0, l = originalList.size(); i < l; i++) {
        // ArrayList<HashMap<String, String>> p =
        // originalList.get(i);
        HashMap<String, String> p = originalList.get(i);
        if (p.toString().toLowerCase().contains(constraint)){
              filteredItems.add(p);
              dummy_drawable.add(drawable.get(i));                 
        }
}

Thanks.

Filtering custom ListView with multiple TextViews using a Filter on an ArrayAdapterT implements Parcelable

In your publishResults method:

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            if (results.count > 0) {
                notifyDataSetChanged();
            } else {
                notifyDataSetInvalidated();
            }
        }

You're not setting the filtered results on your adapter as the new dataset to display before invaliding the dataset. Also, you should be keeping a copy of your original values as well, so if they empty out the query you can retain and reset the original results.

Edit for Framework example code:
http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/5.1.1_r1/android/widget/ArrayAdapter.java#ArrayAdapter.ArrayFilter

Filter ListView with arrayadapter

Convert your String array to ArrayList and pass it to Adapter and use below code or change below code with your String[].

You need to implement Filterable to your Adapter class and Override getFilter()

Checkout this complete example for filtering custom Adapter.

public class ListFilterActivity extends ListActivity {

    private List<String> list = new ArrayList<String>();
    List<String> mOriginalValues;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        final MyAdapter adapter = new MyAdapter(this, getModel());
        setListAdapter(adapter);

        EditText filterEditText = (EditText) findViewById(R.id.filterText);

        // Add Text Change Listener to EditText
        filterEditText.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                // Call back the Adapter with current character to Filter
                adapter.getFilter().filter(s.toString());
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,int after) {
            }

            @Override
            public void afterTextChanged(Editable s) {
            }
        });
    }

    private List<String> getModel() {
        list.add("Linux");
        list.add("Windows7");
        list.add("Suse");
        list.add("Eclipse");
        list.add("Ubuntu");
        list.add("Solaris");
        list.add("Android");
        list.add("iPhone");
        list.add("Windows XP");
        return list;
    }
}

// Adapter Class
public class MyAdapter extends BaseAdapter implements Filterable {

    List<String> arrayList;
    List<String> mOriginalValues; // Original Values
    LayoutInflater inflater;

    public MyAdapter(Context context, List<String> arrayList) {
        this.arrayList = arrayList;
        inflater = LayoutInflater.from(context);
    }

    @Override
    public int getCount() {
        return arrayList.size();
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    private class ViewHolder {
        TextView textView;
    }

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

        ViewHolder holder = null;

        if (convertView == null) {

            holder = new ViewHolder();
            convertView = inflater.inflate(R.layout.row, null);
            holder.textView = (TextView) convertView
            .findViewById(R.id.textview);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.textView.setText(arrayList.get(position));
        return convertView;
    }

    @Override
    public Filter getFilter() {
        Filter filter = new Filter() {

            @SuppressWarnings("unchecked")
            @Override
            protected void publishResults(CharSequence constraint,FilterResults results) {

                arrayList = (List<String>) results.values; // has the filtered values
                notifyDataSetChanged();  // notifies the data with new filtered values
            }

            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                FilterResults results = new FilterResults();        // Holds the results of a filtering operation in values
                List<String> FilteredArrList = new ArrayList<String>();

                if (mOriginalValues == null) {
                    mOriginalValues = new ArrayList<String>(arrayList); // saves the original data in mOriginalValues
                }

                /********
                *
                *  If constraint(CharSequence that is received) is null returns the mOriginalValues(Original) values
                *  else does the Filtering and returns FilteredArrList(Filtered)
                *
                ********/
                if (constraint == null || constraint.length() == 0) {

                    // set the Original result to return
                    results.count = mOriginalValues.size();
                    results.values = mOriginalValues;
                } else {
                    constraint = constraint.toString().toLowerCase();
                    for (int i = 0; i < mOriginalValues.size(); i++) {
                        String data = mOriginalValues.get(i);
                        if (data.toLowerCase().startsWith(constraint.toString())) {
                            FilteredArrList.add(data);
                        }
                    }
                    // set the Filtered result to return
                    results.count = FilteredArrList.size();
                    results.values = FilteredArrList;
                }
                return results;
            }
        };
        return filter;
    }
}

android filter custom array adapter and bring back old items again

My solution:

 public class ResultsArrayAdapter extends ArrayAdapter<SuchErgebnis> {

    Context myContext;
    int layoutResourceId;
    ArrayList<SuchErgebnis> ergebnisListeOriginal = null;
    ArrayList<SuchErgebnis> ergebnisListeGefiltert = null;
    private Filter filter;

    public ResultsArrayAdapter(Context context, int textViewResourceId,
            ArrayList<SuchErgebnis> objects) {
        super(context, textViewResourceId, objects);

        this.myContext = context;
        this.layoutResourceId = textViewResourceId;

        this.ergebnisListeOriginal = new ArrayList<SuchErgebnis>(objects);
        this.ergebnisListeGefiltert = new ArrayList<SuchErgebnis>(objects);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        ErgebnisHolder eHolder = null;
        SuchErgebnis ergebnis = ergebnisListeGefiltert.get(position);

        if (row == null) // Wird zum ersten Mal gelanden...
        {
            LayoutInflater inflater = (LayoutInflater) myContext
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            row = inflater.inflate(R.layout.ergebnis_list_item, parent, false);

            eHolder = new ErgebnisHolder();
            eHolder.eTitel = (TextView) row
                    .findViewById(R.id.ergebnis_list_item_textview_titel);
            eHolder.eInfo = (TextView) row
                    .findViewById(R.id.ergebnis_list_item_textview_info);
            eHolder.eTreffer = (TextView) row
                    .findViewById(R.id.ergebnis_list_item_textview_treffer);

            row.setTag(eHolder);
        } else { // Wurde schoneinmal geladen, Views sind noch gespeichert...
            eHolder = (ErgebnisHolder) row.getTag();
        }

        eHolder.eTitel.setText(ergebnis.titel);
        eHolder.eInfo.setText(ergebnis.info != null ? ergebnis.info : "");
        eHolder.eTreffer.setText(ergebnis.treffer != null ? ergebnis.treffer
                : "");
        row.setPadding(
                ergebnis.isChild ? Main.mFHelper
                        .getPixels(10 * ergebnis.childNumber) : 0, 0, 0, 0);

        return row;
    }

    @Override
    public Filter getFilter() {
        if (filter == null) {
            filter = new ResultFilter();
        }
        return filter;
    }

    static class ErgebnisHolder {
        TextView eTitel;
        TextView eInfo;
        TextView eTreffer;
    }

    @Override
    public int getCount() {
        return ergebnisListeGefiltert.size();
    }

    @Override
    public SuchErgebnis getItem(int position) {
        return ergebnisListeGefiltert.get(position);
    }

    private class ResultFilter extends Filter {

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults results = new FilterResults();

            String filterText = constraint.toString().toLowerCase();
            if (filterText == null || filterText.length() == 0) {
                synchronized (this) {
                    results.values = ergebnisListeOriginal;
                    results.count = ergebnisListeOriginal.size();
                }
            } else {
                ArrayList<SuchErgebnis> gefilterteListe = new ArrayList<SuchErgebnis>();
                ArrayList<SuchErgebnis> ungefilterteListe = new ArrayList<SuchErgebnis>();
                synchronized (this) {
                    ungefilterteListe.addAll(ergebnisListeOriginal);
                }
                for (int i = 0, l = ungefilterteListe.size(); i < l; i++) {
                    SuchErgebnis m = ungefilterteListe.get(i);
                    if (m.titel.toLowerCase().contains(filterText)) {
                        gefilterteListe.add(m);
                    }
                }
                results.values = gefilterteListe;
                results.count = gefilterteListe.size();

            }

            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint,
                FilterResults results) {

            ergebnisListeGefiltert = (ArrayList<SuchErgebnis>) results.values;
            if(results.count > 0)
            {
                notifyDataSetChanged();
            }else{
                notifyDataSetInvalidated();
            }

        }

    }
    }

Custom filtering for Custom ArrayAdapter in ListView

i could solve my Problems. Here my solution!

    package hsos.ds.helper;

import hsos.ds.db.Poi;

import java.util.ArrayList;
import java.util.List;
import android.widget.Filter;

public class ItemsFilter extends Filter {

    private PoiListAdapter poiAdapter;
    private List<Poi> valuesPoi;
    private List<Poi> filteredPoi;

    public ItemsFilter(PoiListAdapter _poiAdapter) {
        this.poiAdapter = _poiAdapter;
        this.valuesPoi = poiAdapter.getValuesPoi();
        this.filteredPoi = poiAdapter.getFilteredPoi();
    }

    @Override
    protected FilterResults performFiltering(CharSequence constraint) {
        FilterResults result = new FilterResults();
        constraint = constraint.toString().toLowerCase();

        if (constraint == null || constraint.length() == 0) {
            ArrayList<Poi> list = new ArrayList<Poi>(valuesPoi);
            result.values = valuesPoi;
            result.count = valuesPoi.size();

        } else {
            final ArrayList<Poi> orginalList = new ArrayList<Poi>(valuesPoi);
            final ArrayList<Poi> filterList = new ArrayList<Poi>();
            int count = orginalList.size();
            for (int i = 0; i < count; i++) {
                final Poi p = orginalList.get(i);
                if (p.getName().toLowerCase().contains(constraint))
                    filterList.add(p);
            }
            result.values = filterList;
            result.count = filterList.size();
        }
        return result;
    }

    @SuppressWarnings("unchecked")
    @Override
    protected void publishResults(CharSequence constraint, FilterResults results) {
        filteredPoi = (List<Poi>) results.values;
        poiAdapter.notifyDataSetChanged();
        poiAdapter.clear();
        int count = filteredPoi.size();
        for (int i = 0; i < count; i++) {
            poiAdapter.add(filteredPoi.get(i));
            poiAdapter.notifyDataSetInvalidated();
        }
    }
}

and the Adapter:

public class PoiListAdapter extends ArrayAdapter implements Filterable {

private List<Poi> valuesPoi;
private List<Poi> filteredPoi;
private ItemsFilter mFilter;

public PoiListAdapter(Context context, List<Poi> valuesPoi) {
    super(context, R.layout.poilist);
    this.valuesPoi = new ArrayList<Poi>(valuesPoi);
    this.filteredPoi = new ArrayList<Poi>(valuesPoi);
    this.mFilter = new ItemsFilter(this);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View v = convertView;
    if (v == null) {
        LayoutInflater vi = (LayoutInflater) getContext().getSystemService(
                Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(R.layout.poilist, null);
    }

    Poi p = filteredPoi.get(position);

    if (p != null) {
        TextView tt = (TextView) v.findViewById(R.id.name_poi);
        TextView bt = (TextView) v.findViewById(R.id.discrip_poi);
        if (tt != null) {
            tt.setText(p.getName());
        }
        if (bt != null) {
            bt.setText(p.getDiscription());
        }
    }
    return v;
}

@Override
public Filter getFilter() {
    if (mFilter == null) {
        mFilter = new ItemsFilter(this);
    }
    return mFilter;
}

public List<Poi> getValuesPoi() {
    return valuesPoi;
}

public List<Poi> getFilteredPoi() {
    return filteredPoi;

}

}

To show the complete list onStart() i insert the a little "hack" in the onStart()-Method of my activity because the complete list is shown after an input:

if(searchText!=null){
        searchText.setText(" ");
        searchText.setText("");
    }

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