Selecting Google Place from AutoCompleteTextView and marking in 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="17" />
   
    <uses-permission android:name="android.permission.INTERNET"/>
   
     <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" >

    <com.mapv2.demo.CustomAutoCompleteTextView
        android:id="@+id/atv_places"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"       
        android:layout_alignParentTop="true"
        android:hint="@string/str_atv_places"
        android:textColor="#000000"
        android:singleLine="true" />
   
    <fragment
        android:id="@+id/map"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"       
        class="com.google.android.gms.maps.SupportMapFragment"
        android:layout_below="@id/atv_places" />  

</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.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AutoCompleteTextView;
import android.widget.ListView;
import android.widget.SimpleAdapter;

import com.google.android.gms.maps.CameraUpdate;
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 {

    AutoCompleteTextView atvPlaces;
   
    DownloadTask placesDownloadTask;
    DownloadTask placeDetailsDownloadTask;
    ParserTask placesParserTask;
    ParserTask placeDetailsParserTask;
   
    GoogleMap googleMap;
   
    final int PLACES=0;
    final int PLACES_DETAILS=1;   
   
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       
        // Getting a reference to the AutoCompleteTextView
        atvPlaces = (AutoCompleteTextView) findViewById(R.id.atv_places);
        atvPlaces.setThreshold(1);       
       
        // Adding textchange listener
        atvPlaces.addTextChangedListener(new TextWatcher() {
           
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {   
                // Creating a DownloadTask to download Google Places matching "s"
                placesDownloadTask = new DownloadTask(PLACES);
               
                // Getting url to the Google Places Autocomplete api
                String url = getAutoCompleteUrl(s.toString());
               
                // Start downloading Google Places
                // This causes to execute doInBackground() of DownloadTask class
                placesDownloadTask.execute(url);
            }
           
            @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               
            }
        });
       
        // Setting an item click listener for the AutoCompleteTextView dropdown list       
        atvPlaces.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int index,
                            long id) {

                    ListView lv = (ListView) arg0;
                    SimpleAdapter adapter = (SimpleAdapter) arg0.getAdapter();

                    HashMap<String, String> hm = (HashMap<String, String>) adapter.getItem(index);                   
                   
                    // Creating a DownloadTask to download Places details of the selected place
                    placeDetailsDownloadTask = new DownloadTask(PLACES_DETAILS);
                   
                    // Getting url to the Google Places details api
                    String url = getPlaceDetailsUrl(hm.get("reference"));                   
                   
                    // Start downloading Google Place Details
                    // This causes to execute doInBackground() of DownloadTask class
                    placeDetailsDownloadTask.execute(url);
                   
            }
        });       
    }
   
   
    private String getAutoCompleteUrl(String place){
                   
        // Obtain browser key from https://code.google.com/apis/console
        String key = "key=AIzaSyCfdXATlz7jtM6MEvy9Xh_3_g_Ivc5ysXE";
                   
        // place to be be searched
        String input = "input="+place;
                   
        // place type to be searched
        String types = "types=geocode";
                   
        // 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;
       
        return url;
    }
   
   
    private String getPlaceDetailsUrl(String ref){
       
        // Obtain browser key from https://code.google.com/apis/console
        String key = "key=YOUR_API_KEY";
                   
        // reference of place
        String reference = "reference="+ref;                   
                   
        // Sensor enabled
        String sensor = "sensor=false";           
                   
        // Building the parameters to the web service
        String parameters = reference+"&"+sensor+"&"+key;
                   
        // Output format
        String output = "json";
       
        // Building the url to the web service
        String url = "https://maps.googleapis.com/maps/api/place/details/"+output+"?"+parameters;
       
        return url;
    }
   
    /** 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;
     }
   
   
    // Fetches data from url passed
    private class DownloadTask extends AsyncTask<String, Void, String>{
       
        private int downloadType=0;
       
        // Constructor
        public DownloadTask(int type){
            this.downloadType = type;           
        }

        @Override
        protected String doInBackground(String... url) {
           
            // For storing data from web service
            String data = "";
           
            try{
                // Fetching the data from web service
                data = downloadUrl(url[0]);
            }catch(Exception e){
                Log.d("Background Task",e.toString());
            }
            return data;       
        }
       
        @Override
        protected void onPostExecute(String result) {           
            super.onPostExecute(result);       
           
            switch(downloadType){
            case PLACES:
                // Creating ParserTask for parsing Google Places
                placesParserTask = new ParserTask(PLACES);
               
                // Start parsing google places json data
                // This causes to execute doInBackground() of ParserTask class
                placesParserTask.execute(result);
               
                break;
               
            case PLACES_DETAILS :
                // Creating ParserTask for parsing Google Places
                placeDetailsParserTask = new ParserTask(PLACES_DETAILS);
               
                // Starting Parsing the JSON string
                // This causes to execute doInBackground() of ParserTask class
                placeDetailsParserTask.execute(result);                               
            }           
        }       
    }
   
   
    /** A class to parse the Google Places in JSON format */
    private class ParserTask extends AsyncTask<String, Integer, List<HashMap<String,String>>>{

        int parserType = 0;
       
        public ParserTask(int type){
            this.parserType = type;
        }
       
        @Override
        protected List<HashMap<String, String>> doInBackground(String... jsonData) {
           
            JSONObject jObject;           
            List<HashMap<String, String>> list = null;          
           
            try{
                jObject = new JSONObject(jsonData[0]);
               
                switch(parserType){
                case PLACES :
                    PlaceJSONParser placeJsonParser = new PlaceJSONParser();
                    // Getting the parsed data as a List construct
                    list = placeJsonParser.parse(jObject);
                    break;
                case PLACES_DETAILS :                         
                    PlaceDetailsJSONParser placeDetailsJsonParser = new PlaceDetailsJSONParser();
                    // Getting the parsed data as a List construct
                       list = placeDetailsJsonParser.parse(jObject);
                }

            }catch(Exception e){
                Log.d("Exception",e.toString());
            }
            return list;
        }
       
        @Override
        protected void onPostExecute(List<HashMap<String, String>> result) {
           
                switch(parserType){
                case PLACES :
                    String[] from = new String[] { "description"};
                    int[] to = new int[] { android.R.id.text1 };
                       
                    // Creating a SimpleAdapter for the AutoCompleteTextView
                    SimpleAdapter adapter = new SimpleAdapter(getBaseContext(), result, android.R.layout.simple_list_item_1, from, to);               
                       
                    // Setting the adapter
                    atvPlaces.setAdapter(adapter);                       
                    break;
                case PLACES_DETAILS :                       
                    HashMap<String, String> hm = result.get(0);
                   
                    // Getting latitude from the parsed data
                    double latitude = Double.parseDouble(hm.get("lat"));
                   
                    // Getting longitude from the parsed data
                    double longitude = Double.parseDouble(hm.get("lng"));                                       
                   
                    // Getting reference to the SupportMapFragment of the activity_main.xml
                    SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
                   
                    // Getting GoogleMap from SupportMapFragment
                    googleMap = fm.getMap();
                   
                   
                    LatLng point = new LatLng(latitude, longitude);
                   
                    CameraUpdate cameraPosition = CameraUpdateFactory.newLatLng(point);
                    CameraUpdate cameraZoom = CameraUpdateFactory.zoomBy(5);
                   
                    // Showing the user input location in the Google Map                   
                    googleMap.moveCamera(cameraPosition);
                    googleMap.animateCamera(cameraZoom);
                   
                    MarkerOptions options = new MarkerOptions();
                    options.position(point);
                    options.title("Position");
                    options.snippet("Latitude:"+latitude+",Longitude:"+longitude);
                   
                    // Adding the marker in the Google Map
                    googleMap.addMarker(options);                   
                   
                    break;                       
                }           
        }           
    }       
      
    @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;
    }
}


1.) CustomAutoCompleteTextView.java
package com.mapv2.demo;

import java.util.HashMap;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.AutoCompleteTextView;

/** Customizing AutoCompleteTextView to return Place Description  
 *  corresponding to the selected item
 */
public class CustomAutoCompleteTextView extends AutoCompleteTextView {
   
    public CustomAutoCompleteTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    /** Returns the Place Description corresponding to the selected item */
    @Override
    protected CharSequence convertSelectionToString(Object selectedItem) {
        /** Each item in the autocompetetextview suggestion list is a hashmap object */
        HashMap<String, String> hm = (HashMap<String, String>) selectedItem;
        return hm.get("description");
    }
}



2.)  PlaceDetailsJSONParser.java
package com.mapv2.demo;

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

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

public class PlaceDetailsJSONParser {
   
    /** Receives a JSONObject and returns a list */
    public List<HashMap<String,String>> parse(JSONObject jObject){       
       
        Double lat = Double.valueOf(0);
        Double lng = Double.valueOf(0);
       
        HashMap<String, String> hm = new HashMap<String, String>();
        List<HashMap<String, String>> list = new ArrayList<HashMap<String,String>>();
       
        try {           
            lat = (Double)jObject.getJSONObject("result").getJSONObject("geometry").getJSONObject("location").get("lat");
            lng = (Double)jObject.getJSONObject("result").getJSONObject("geometry").getJSONObject("location").get("lng");
           
        } catch (JSONException e) {
            e.printStackTrace();           
        }catch(Exception e){           
            e.printStackTrace();
        }
       
       
        hm.put("lat", Double.toString(lat));
        hm.put("lng", Double.toString(lng));
       
        list.add(hm);
       
        return list;
    }   
}


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("predictions");
        } 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 id="";
        String reference="";
        String description="";       
       
        try {
           
            description = jPlace.getString("description");           
            id = jPlace.getString("id");
            reference = jPlace.getString("reference");
           
            place.put("description", description);
            place.put("_id",id);
            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/map14.zip