Google maps Places API not working

Question

package com.example.googlemapstestproject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

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

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.SimpleAdapter;
import android.widget.Toast;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.GoogleMap.OnMyLocationButtonClickListener;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends ActionBarActivity implements OnMapLongClickListener, OnMyLocationButtonClickListener,
        android.view.View.OnClickListener {

    private GoogleMap mMap;
    Button userLocation;`enter code here`
    GPSTracker gps;

    PlacesTask placesTask;
    ParserTask parserTask;

    AutoCompleteTextView autoCompView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        autoCompView = (AutoCompleteTextView) findViewById(R.id.atv_places);


        autoCompView.setThreshold(1);

        autoCompView.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                placesTask = new PlacesTask();
                placesTask.execute(s.toString());
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                // TODO Auto-generated method stub
            }

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

            }
        });

        try {
            // Loading map
            initilizeMap();

        } catch (Exception e) {
            e.printStackTrace();
        }

        mMap.setOnMapLongClickListener(this);
        mMap.setMyLocationEnabled(true);
        mMap.getUiSettings().setZoomControlsEnabled(true);
    }


    private String downloadUrl(String strUrl) throws IOException {

        String data = "";
        InputStream iStream = null;
        HttpURLConnection urlConnection = null;
        try {

            URL url = new URL(strUrl);

            // Creating an http connection to communicate with url
            urlConnection = (HttpURLConnection) url.openConnection();

            // Connecting to url
            urlConnection.connect();

            // Reading data from url
            iStream = urlConnection.getInputStream();

            BufferedReader br = new BufferedReader(new InputStreamReader(iStream));

            StringBuffer sb = new StringBuffer();

            String line = "";
            while ((line = br.readLine()) != null) {

                sb.append(line);
            }

            data = sb.toString();
            br.close();

        } catch (Exception e) {

            Log.d("Exception while downloading url", e.toString());

        } 
        finally {

            iStream.close();
            urlConnection.disconnect();
        }

        return data;
    }

    // Fetches all places from GooglePlaces AutoComplete Web Service
    private class PlacesTask extends AsyncTask<String, Void, String> {

        @Override
        protected String doInBackground(String... place) {

            // For storing data from web service
            String data = "";

            // Obtain browser key from https://code.google.com/apis/console
            String key = "key=AIzaSyDTg7d-JNRLRxe75QDEEeAGr1xnSHGX9V4";

            String input = "";

            try {
                input = "input=" + URLEncoder.encode(place[0], "utf-8");
            } catch (UnsupportedEncodingException e1) {
                e1.printStackTrace();
            }

            // place type to be searched
            String types = "types=(cities)";

            // Sensor enabled
            String sensor = "sensor=false";

            // Building the parameters to the web service
            String parameters = input + "&" + types + "&" + sensor + "&" + key;

            // Output format
            String output = "json";

            // Building the url to the web service
            String url = "https://maps.googleapis.com/maps/api/place/autocomplete/" + output + "?" + parameters;

            try {
                // Fetching the data from we service
                data = downloadUrl(url);
            } catch (Exception e) {
                Log.d("Background Task", e.toString());
            }
            return data;
        }


        // Executed after the complete execution of doInBackground() method
        @Override
        protected void onPostExecute(String result) {

            // Instantiating ParserTask which parses the json data from
            // Geocoding webservice
            // in a non-ui thread
            ParserTask parserTask = new ParserTask();

            // Start parsing the places in JSON format
            // Invokes the "doInBackground()" method of the class ParseTask
            parserTask.execute(result);
        }
    }

    // A class to parse the Google Places in JSON format
    private class ParserTask extends AsyncTask<String, Integer, List<HashMap<String, String>>> {

        JSONObject jObject;

        @Override
        protected List<HashMap<String, String>> doInBackground(String... jsonData) {

            List<HashMap<String, String>> places = null;

            PlaceJSONParser placeJsonParser = new PlaceJSONParser();


            try {
                jObject = new JSONObject(jsonData[0]);

                // Getting the parsed data as a List
                places = placeJsonParser.parse(jObject);

            } catch (Exception e) {
                Log.d("Exception", e.toString());
            }
            return places;
        }


        @Override
        protected void onPostExecute(List<HashMap<String, String>> result) {

            String[] from = new String[] { "description" };
            int[] to = new int[] { R.layout.listview_layout };

            // Creating a SimpleAdapter for the AutoCompleteTextView
            SimpleAdapter adapter = new SimpleAdapter(getBaseContext(), result, android.R.layout.simple_list_item_1, from, to);

            // Setting the adapter
            autoCompView.setAdapter(adapter);
        }
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub

    }
}

Updated code update, everything looks fine it is just that there is nothing appearing still when I type in a place.

I have made the google maps half and half with a listview as well so if anyone has any good solutions on how to get them to work together that would be great.

Answer 1

If you would like to use a library that provides a GooglePlaceAutoComplete widget, check out Sprockets (I'm the developer). After setting it up with your API key, you could add a working Places API autocomplete to your layout with something like:

<net.sf.sprockets.widget.GooglePlaceAutoComplete
    xmlns:sprockets="http://schemas.android.com/apk/res-auto"
    android:id="@+id/place"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    sprockets:types="(cities)"/>