Showing nearby places using Google Places API and Google Map Android API V2

Step 1 :- Create New Android Project.



Step 2 :- Add Google-play-services_lib to your project.

Step 3 :- Open AndroidManifest.xml file.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.mapv2.demo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="16" />
   
    <permission
        android:name="com.mapv2.demo.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>

    <uses-permission android:name="com.mapv2.demo.permission.MAPS_RECEIVE"/>

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true"/>   

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.mapv2.demo.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
       
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="AIzaSyCmX7SLVHXxU9pSqb2QbAOvdnjAGUulOrk"/>       
       
    </application>
   
</manifest>

Step 4 :- Open activity_main.xml.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >
   
    <Spinner
        android:id="@+id/spr_place_type"
        android:layout_width="wrap_content"
        android:layout_height="60dp"
        android:layout_alignParentTop="true" />
   
    <Button
        android:id="@+id/btn_find"
        android:layout_width="wrap_content"
        android:layout_height="60dp"       
        android:layout_alignParentTop="true"
        android:layout_toRightOf="@id/spr_place_type"
        android:text="@string/str_btn_find" />   

    <fragment xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/map"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/spr_place_type"
        class="com.google.android.gms.maps.SupportMapFragment" />   
   
</RelativeLayout>

Step 5 :- Open MainActivity.java

package com.mapv2.demo;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.List;

import org.json.JSONObject;

import android.app.Dialog;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;


public class MainActivity extends FragmentActivity implements LocationListener{
   
    GoogleMap mGoogleMap;   
    Spinner mSprPlaceType;   
   
    String[] mPlaceType=null;
    String[] mPlaceTypeName=null;
   
    double mLatitude=0;
    double mLongitude=0;
   
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
       
       
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);       
       
        // Array of place types
        mPlaceType = getResources().getStringArray(R.array.place_type);
       
        // Array of place type names
        mPlaceTypeName = getResources().getStringArray(R.array.place_type_name);
       
        // Creating an array adapter with an array of Place types
        // to populate the spinner
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, mPlaceTypeName);
       
        // Getting reference to the Spinner
        mSprPlaceType = (Spinner) findViewById(R.id.spr_place_type);
       
        // Setting adapter on Spinner to set place types
        mSprPlaceType.setAdapter(adapter);
       
        Button btnFind;
       
        // Getting reference to Find Button
        btnFind = ( Button ) findViewById(R.id.btn_find);
       
       
        // Getting Google Play availability status
        int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());

       
        if(status!=ConnectionResult.SUCCESS){ // Google Play Services are not available

            int requestCode = 10;
            Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
            dialog.show();

        }else { // Google Play Services are available
           
            // Getting reference to the SupportMapFragment
            SupportMapFragment fragment = ( SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
                   
            // Getting Google Map
            mGoogleMap = fragment.getMap();
                   
            // Enabling MyLocation in Google Map
            mGoogleMap.setMyLocationEnabled(true);
           
           
           
            // Getting LocationManager object from System Service LOCATION_SERVICE
            LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

            // Creating a criteria object to retrieve provider
            Criteria criteria = new Criteria();

            // Getting the name of the best provider
            String provider = locationManager.getBestProvider(criteria, true);

            // Getting Current Location From GPS
            Location location = locationManager.getLastKnownLocation(provider);

            if(location!=null){
                    onLocationChanged(location);
            }

            locationManager.requestLocationUpdates(provider, 20000, 0, this);
           
            // Setting click event lister for the find button
            btnFind.setOnClickListener(new OnClickListener() {
               
                @Override
                public void onClick(View v) {   
                   
                   
                    int selectedPosition = mSprPlaceType.getSelectedItemPosition();
                    String type = mPlaceType[selectedPosition];
                                       
                   
                    StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/nearbysearch/json?");
                    sb.append("location="+mLatitude+","+mLongitude);
                    sb.append("&radius=5000");
                    sb.append("&types="+type);
                    sb.append("&sensor=true");
                    sb.append("&key=AIzaSyCfdXATlz7jtM6MEvy9Xh_3_g_Ivc5ysXE");
                   
                   
                    // Creating a new non-ui thread task to download Google place json data
                    PlacesTask placesTask = new PlacesTask();                                   
                   
                    // Invokes the "doInBackground()" method of the class PlaceTask
                    placesTask.execute(sb.toString());
                   
                   
                }
            });
           
        }       
        
    }
   
    /** A method to download json data from url */
    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;
    }        

   
    /** A class, to download Google Places */
    private class PlacesTask extends AsyncTask<String, Integer, String>{

        String data = null;
       
        // Invoked by execute() method of this object
        @Override
        protected String doInBackground(String... url) {
            try{
                data = downloadUrl(url[0]);
            }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){           
            ParserTask parserTask = new ParserTask();
           
            // Start parsing the Google 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;
       
        // Invoked by execute() method of this object
        @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 construct */
                places = placeJsonParser.parse(jObject);
               
            }catch(Exception e){
                    Log.d("Exception",e.toString());
            }
            return places;
        }
       
        // Executed after the complete execution of doInBackground() method
        @Override
        protected void onPostExecute(List<HashMap<String,String>> list){           
           
            // Clears all the existing markers
            mGoogleMap.clear();
           
            for(int i=0;i<list.size();i++){
           
                // Creating a marker
                MarkerOptions markerOptions = new MarkerOptions();
               
                // Getting a place from the places list
                HashMap<String, String> hmPlace = list.get(i);
   
                // Getting latitude of the place
                double lat = Double.parseDouble(hmPlace.get("lat"));               
               
                // Getting longitude of the place
                double lng = Double.parseDouble(hmPlace.get("lng"));
               
                // Getting name
                String name = hmPlace.get("place_name");
               
                // Getting vicinity
                String vicinity = hmPlace.get("vicinity");
               
                LatLng latLng = new LatLng(lat, lng);
               
                // Setting the position for the marker
                markerOptions.position(latLng);
   
                // Setting the title for the marker.
                //This will be displayed on taping the marker
                markerOptions.title(name + " : " + vicinity);               
   
                // Placing a marker on the touched position
                mGoogleMap.addMarker(markerOptions);           
           
            }       
           
        }
       
    }
   
   

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    @Override
    public void onLocationChanged(Location location) {
        mLatitude = location.getLatitude();
        mLongitude = location.getLongitude();
        LatLng latLng = new LatLng(mLatitude, mLongitude);
       
        mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(12));
       
    }

    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub
       
    }

    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub
       
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub
       
    }
}




1.) PlaceJSONParser.java

package com.mapv2.demo;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

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

public class PlaceJSONParser {
   
    /** Receives a JSONObject and returns a list */
    public List<HashMap<String,String>> parse(JSONObject jObject){       
       
        JSONArray jPlaces = null;
        try {           
            /** Retrieves all the elements in the 'places' array */
            jPlaces = jObject.getJSONArray("results");
        } catch (JSONException e) {
            e.printStackTrace();
        }
        /** Invoking getPlaces with the array of json object
         * where each json object represent a place
         */
        return getPlaces(jPlaces);
    }
   
   
    private List<HashMap<String, String>> getPlaces(JSONArray jPlaces){
        int placesCount = jPlaces.length();
        List<HashMap<String, String>> placesList = new ArrayList<HashMap<String,String>>();
        HashMap<String, String> place = null;   

        /** Taking each place, parses and adds to list object */
        for(int i=0; i<placesCount;i++){
            try {
                /** Call getPlace with place JSON object to parse the place */
                place = getPlace((JSONObject)jPlaces.get(i));
                placesList.add(place);

            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
       
        return placesList;
    }
   
    /** Parsing the Place JSON object */
    private HashMap<String, String> getPlace(JSONObject jPlace){

        HashMap<String, String> place = new HashMap<String, String>();
        String placeName = "-NA-";
        String vicinity="-NA-";
        String latitude="";
        String longitude="";
               
       
        try {
            // Extracting Place name, if available
            if(!jPlace.isNull("name")){
                placeName = jPlace.getString("name");
            }
           
            // Extracting Place Vicinity, if available
            if(!jPlace.isNull("vicinity")){
                vicinity = jPlace.getString("vicinity");
            }   
           
            latitude = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lat");
            longitude = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lng");           
           
           
            place.put("place_name", placeName);
            place.put("vicinity", vicinity);
            place.put("lat", latitude);
            place.put("lng", longitude);
           
           
        } catch (JSONException e) {           
            e.printStackTrace();
        }       
        return place;
    }
}

Step 6 :- Run Code.

Step 7 :- Download Code :- https://dl.dropboxusercontent.com/u/109954727/Map/map9.zip