Android Map: Showing nearby places and place details using Google Places API and Google Maps 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="17" />

 <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>


 <activity
 android:name="com.mapv2.demo.PlaceDetailsActivity"
 android:label="@string/app_name" >
 <intent-filter>
 <action android:name=".PlaceDetails" />
 <category android:name="android.intent.category.DEFAULT" />
 </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>

1.) activity_place_details.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical" >

 <WebView
 android:id="@+id/wv_place_details"
 android:layout_width="fill_parent"
 android:layout_height="match_parent" />


</LinearLayout>

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.content.Intent;
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.GoogleMap.OnInfoWindowClickListener;
import com.google.android.gms.maps.GoogleMap.OnMarkerClickListener;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
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;

 HashMap<String, String> mMarkerPlaceLink = new HashMap<String, String>();


 @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);

 mGoogleMap.setOnInfoWindowClickListener(new OnInfoWindowClickListener() {

 @Override
 public void onInfoWindowClick(Marker arg0) {
 Intent intent = new Intent(getBaseContext(), PlaceDetailsActivity.class);
 String reference = mMarkerPlaceLink.get(arg0.getId());
 intent.putExtra("reference", reference);

 // Starting the Place Details Activity
 startActivity(intent);
 }
 });



 // 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
 Marker m = mGoogleMap.addMarker(markerOptions);

 // Linking Marker id and place reference
 mMarkerPlaceLink.put(m.getId(), hmPlace.get("reference"));


 }

 }

 }



 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 // Inflate the menu; this adds items to the action bar if it is present.
 getMenuInflater().inflate(R.menu.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.) PlaceDetailsActivity.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 org.json.JSONObject;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.webkit.WebView;

public class PlaceDetailsActivity extends Activity {
 WebView mWvPlaceDetails;


 protected void onCreate(Bundle savedInstanceState) {

 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_place_details);

 // Getting reference to WebView ( wv_place_details ) of the layout activity_place_details
 mWvPlaceDetails = (WebView) findViewById(R.id.wv_place_details);

 mWvPlaceDetails.getSettings().setUseWideViewPort(false);

 // Getting place reference from the map
 String reference = getIntent().getStringExtra("reference");


 StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/details/json?");
 sb.append("reference="+reference);
 sb.append("&sensor=true");
 sb.append("&key=AIzaSyCfdXATlz7jtM6MEvy9Xh_3_g_Ivc5ysXE");


 // Creating a new non-ui thread task to download Google place details
 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 Place Details */
 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 place details in JSON format
 // Invokes the "doInBackground()" method of the class ParseTask
 parserTask.execute(result);
 }
 }


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

 JSONObject jObject;

 // Invoked by execute() method of this object
 @Override
 protected HashMap<String,String> doInBackground(String... jsonData) {

 HashMap<String, String> hPlaceDetails = null;
 PlaceDetailsJSONParser placeDetailsJsonParser = new PlaceDetailsJSONParser();

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

 // Start parsing Google place details in JSON format
 hPlaceDetails = placeDetailsJsonParser.parse(jObject);

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

 // Executed after the complete execution of doInBackground() method
 @Override
 protected void onPostExecute(HashMap<String,String> hPlaceDetails){


 String name = hPlaceDetails.get("name");
 String icon = hPlaceDetails.get("icon");
 String vicinity = hPlaceDetails.get("vicinity");
 String lat = hPlaceDetails.get("lat");
 String lng = hPlaceDetails.get("lng");
 String formatted_address = hPlaceDetails.get("formatted_address");
 String formatted_phone = hPlaceDetails.get("formatted_phone");
 String website = hPlaceDetails.get("website");
 String rating = hPlaceDetails.get("rating");
 String international_phone_number = hPlaceDetails.get("international_phone_number");
 String url = hPlaceDetails.get("url");


 String mimeType = "text/html";
 String encoding = "utf-8";

 String data = "<html>"+
 "<body><img style='float:left' src="+icon+" /><h1><center>"+name+"</center></h1>" +
 " " +
 "<hr />"+
 "Vicinity : " + vicinity + "" +
 "Location : " + lat + "," + lng + "" +
 "Address : " + formatted_address + "" +
 "Phone : " + formatted_phone + "" +
 "Website : " + website + "" +
 "Rating : " + rating + "" +
 "International Phone : " + international_phone_number + "" +
 "URL : <a href='" + url + "'>" + url + "" +
 "</body></html>";

 // Setting the data in WebView
 mWvPlaceDetails.loadDataWithBaseURL("", data, mimeType, encoding, "");
 }
 }
}

2.) PlaceDetailsJSONParser.java

package com.mapv2.demo;

import java.util.HashMap;

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

public class PlaceDetailsJSONParser {

 /** Receives a JSONObject and returns a list */
 public HashMap<String,String> parse(JSONObject jObject){

 JSONObject jPlaceDetails = null;
 try {
 /** Retrieves all the elements in the 'places' array */
 jPlaceDetails = jObject.getJSONObject("result");
 } catch (JSONException e) {
 e.printStackTrace();
 }
 /** Invoking getPlaces with the array of json object
 * where each json object represent a place
 */
 return getPlaceDetails(jPlaceDetails);
 }


 /** Parsing the Place Detai12ls Object object */
 private HashMap<String, String> getPlaceDetails(JSONObject jPlaceDetails){


 HashMap<String, String> hPlaceDetails = new HashMap<String, String>();

 String name = "-NA-";
 String icon = "-NA-";
 String vicinity="-NA-";
 String latitude="";
 String longitude="";
 String formatted_address="-NA-";
 String formatted_phone="-NA-";
 String website="-NA-";
 String rating="-NA-";
 String international_phone_number="-NA-";
 String url="-NA-";

 try {
 // Extracting Place name, if available
 if(!jPlaceDetails.isNull("name")){
 name = jPlaceDetails.getString("name");
 }

 // Extracting Icon, if available
 if(!jPlaceDetails.isNull("icon")){
 icon = jPlaceDetails.getString("icon");
 }

 // Extracting Place Vicinity, if available
 if(!jPlaceDetails.isNull("vicinity")){
 vicinity = jPlaceDetails.getString("vicinity");
 }

 // Extracting Place formatted_address, if available
 if(!jPlaceDetails.isNull("formatted_address")){
 formatted_address = jPlaceDetails.getString("formatted_address");
 }

 // Extracting Place formatted_phone, if available
 if(!jPlaceDetails.isNull("formatted_phone_number")){
 formatted_phone = jPlaceDetails.getString("formatted_phone_number");
 }

 // Extracting website, if available
 if(!jPlaceDetails.isNull("website")){
 website = jPlaceDetails.getString("website");
 }

 // Extracting rating, if available
 if(!jPlaceDetails.isNull("rating")){
 rating = jPlaceDetails.getString("rating");
 }

 // Extracting rating, if available
 if(!jPlaceDetails.isNull("international_phone_number")){
 international_phone_number = jPlaceDetails.getString("international_phone_number");
 }

 // Extracting url, if available
 if(!jPlaceDetails.isNull("url")){
 url = jPlaceDetails.getString("url");
 }

 latitude = jPlaceDetails.getJSONObject("geometry").getJSONObject("location").getString("lat");
 longitude = jPlaceDetails.getJSONObject("geometry").getJSONObject("location").getString("lng");


 hPlaceDetails.put("name", name);
 hPlaceDetails.put("icon", icon);
 hPlaceDetails.put("vicinity", vicinity);
 hPlaceDetails.put("lat", latitude);
 hPlaceDetails.put("lng", longitude);
 hPlaceDetails.put("formatted_address", formatted_address);
 hPlaceDetails.put("formatted_phone", formatted_phone);
 hPlaceDetails.put("website", website);
 hPlaceDetails.put("rating", rating);
 hPlaceDetails.put("international_phone_number", international_phone_number);
 hPlaceDetails.put("url", url);

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

 return hPlaceDetails;
 }
}

3.) 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="";
 String reference="";


 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");
 reference = jPlace.getString("reference");


 place.put("place_name", placeName);
 place.put("vicinity", vicinity);
 place.put("lat", latitude);
 place.put("lng", longitude);
 place.put("reference", reference);


 } catch (JSONException e) {
 e.printStackTrace();
 }
 return place;
 }
}

Step 6 :- Run Code.

Step 7 :- Download Code :- https://dl.dropboxusercontent.com/u/109954727/Map/map30.zip

Android Map

Tuesday 12 November 2013

Showing nearby places and place details using Google Places API and Google Maps Android API V2

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