How to add suggested places in Google maps?

Question

I did everything according to the tutorial with Google: https://developers.google.com/places/training/autocomplete-android

and still have errors in the project

I have a problem in this piece of code:

private class PlacesAutoCompleteAdapter extends ArrayAdapter<String> implements Filterable {
    private ArrayList<String> resultList;

    public PlacesAutoCompleteAdapter(Context context, int textViewResourceId) {
        super(context, textViewResourceId);
    }

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

    @Override
    public String getItem(int index) {
        return resultList.get(index);
    }

    @Override
    public Filter getFilter() {
        Filter filter = new Filter() {
            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                FilterResults filterResults = new FilterResults();
                if (constraint != null) {
                    // Retrieve the autocomplete results.
                    resultList = autocomplete(constraint.toString());

                    // Assign the data to the FilterResults
                    filterResults.values = resultList;
                    filterResults.count = resultList.size();
                }
                return filterResults;
            }

            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {
                if (results != null && results.count > 0) {
                    notifyDataSetChanged();
                }
                else {
                    notifyDataSetInvalidated();
                }
            }};
        return filter;
    }
}

and imports:

import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.os.AsyncTask;
import android.os.Handler;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Filterable;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;

import com.ggimer.dodatki.Animacje;
import com.ggimer.wyznaczanietrasy.R;
import com.google.android.gms.drive.query.Filter;
import com.google.android.gms.maps.GoogleMap;

and errors:

Multiple markers at this line - The return type is incompatible with ArrayAdapter.getFilter() - overrides android.widget.ArrayAdapter.getFilter

Multiple markers at this line - FilterResults cannot be resolved to a type - The method performFiltering(CharSequence) of type new Filter(){} must override or implement a supertype method Multiple markers at this line - FilterResults cannot be resolved to a type - FilterResults cannot be resolved to a type

FilterResults cannot be resolved to a type

I added errors.

Why copying all of the documentation I still have errors?

Answer 1

Filter is an abstract class.

I think you are missing part of it in the anonymous class declaration. Did you check the docs?

Plus, your import: import com.google.android.gms.drive.query.Filter;

may be causing part of your problem. I don't think that the two types are compatible:

• ArrayAdapter.GetFilter is expected to return android.widget.Filter
• your imports make it seem like you might be returning com.google.android.gms.drive.query.Filter

So, double check that. Try removing import com.google.android.gms.drive.query.Filter; and see if that fixes it.