Android AutoCompleteTextView with Custom Adapter filtering not working

Question

I've the Custom CustomerAdapter

public class CustomerAdapter extends ArrayAdapter<Customer> {
    private final String MY_DEBUG_TAG = "CustomerAdapter";
    private ArrayList<Customer> items;
    private int viewResourceId;

    public CustomerAdapter(Context context, int viewResourceId, ArrayList<Customer> items) {
        super(context, viewResourceId, items);
        this.items = items;
        this.viewResourceId = viewResourceId;
    }

    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(viewResourceId, null);
        }
        Customer customer = items.get(position);
        if (customer != null) {
            TextView customerNameLabel = (TextView) v.findViewById(R.id.customerNameLabel);
            if (customerNameLabel != null) {
                customerNameLabel.setText(String.valueOf(customer.getName()));
            }
        }
        return v;
    }
}

and customer_auto layout

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/customerNameLabel"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    android:padding="10dp" android:textSize="16sp" 
    android:textColor="#000">
</TextView>

and on my public void onCreate

AutoCompleteTextView customerAutoComplete = (AutoCompleteTextView) findViewById(R.id.autocomplete_customer);
CustomerAdapter customerAdapter = new CustomerAdapter(this, R.layout.customer_auto, customerList);
customerAutoComplete.setAdapter(customerAdapter);

and Customer.java

public class Customer implements Parcelable {

    private int id;
    private String name = "";

    public Customer() {
        // TODO Auto-generated constructor stub
    }

    /**
     * This will be used only by the MyCreator
     * 
     * @param source
     */
    public Customer(Parcel source) {
        /*
         * Reconstruct from the Parcel
         */
        id = source.readInt();
        name = source.readString();
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getId() {
        return this.id;
    }

    public String getName() {
        return this.name;
    }

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeInt(id);
        dest.writeString(name);
    }

    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {

        @Override
        public Customer createFromParcel(Parcel source) {
            return new Customer(source);
        }

        @Override
        public Customer[] newArray(int size) {
            return new Customer[size];
            // TODO Auto-generated method stub
        }

    };

    @Override
    public String toString() {
        return this.name;
    }

}

But the auto suggest box does not filter correctly. for eg; if i type an in the test box customers starting with br are showing up!

Answer 1

I have to over-ride the getFilter() method of the Adapter

Here is the code which worked for me, thanks to sacoskun

public class CustomerAdapter extends ArrayAdapter<Customer> {
    private final String MY_DEBUG_TAG = "CustomerAdapter";
    private ArrayList<Customer> items;
    private ArrayList<Customer> itemsAll;
    private ArrayList<Customer> suggestions;
    private int viewResourceId;

    public CustomerAdapter(Context context, int viewResourceId, ArrayList<Customer> items) {
        super(context, viewResourceId, items);
        this.items = items;
        this.itemsAll = (ArrayList<Customer>) items.clone();
        this.suggestions = new ArrayList<Customer>();
        this.viewResourceId = viewResourceId;
    }

    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(viewResourceId, null);
        }
        Customer customer = items.get(position);
        if (customer != null) {
            TextView customerNameLabel = (TextView) v.findViewById(R.id.customerNameLabel);
            if (customerNameLabel != null) {
//              Log.i(MY_DEBUG_TAG, "getView Customer Name:"+customer.getName());
                customerNameLabel.setText(customer.getName());
            }
        }
        return v;
    }

    @Override
    public Filter getFilter() {
        return nameFilter;
    }

    Filter nameFilter = new Filter() {
        @Override
        public String convertResultToString(Object resultValue) {
            String str = ((Customer)(resultValue)).getName(); 
            return str;
        }
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            if(constraint != null) {
                suggestions.clear();
                for (Customer customer : itemsAll) {
                    if(customer.getName().toLowerCase().startsWith(constraint.toString().toLowerCase())){
                        suggestions.add(customer);
                    }
                }
                FilterResults filterResults = new FilterResults();
                filterResults.values = suggestions;
                filterResults.count = suggestions.size();
                return filterResults;
            } else {
                return new FilterResults();
            }
        }
        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            ArrayList<Customer> filteredList = (ArrayList<Customer>) results.values;
            if(results != null && results.count > 0) {
                clear();
                for (Customer c : filteredList) {
                    add(c);
                }
                notifyDataSetChanged();
            }
        }
    };

}