Friday, 1 July 2016

Android Google Maps With Nearyby Places

Show User Current Location and Load Nearby Places (within 5km radius) using Volley.

Today im gonna show you how to show current location and load nearby places in android.
Previously had some trouble with other google places and maps tutorial coz of complexity and underinformations, but finally, here comes the simplest and cleanest code of all.

Project Structure:


1. Obtaining Api keys; Enabling Google Maps, Places for Android and Google Places Web Service

> We will get two api keys, one for Android Api Key for google maps and another one for Browser Api Key for google maps.
> In that case, we will enable three Apis:
1. Google Maps for Android
2. Google Places for Android
3. Google Places for Web Service


- This the one procedure that is very confusing, more especially when you use a wrong api key and your app fails to load all the nearby places.
* The best way around this is to create an android project with a map activity in android studio, there are some credentials we will need from the app to get the api keys.

i) Create a new android maps activity project and name is GPlaces, do review my previous maps project <Show Current Location> to get it right, because our app will built on top of that.

ii) Pick the api url from the google_maps_api.xml and paste it to the browser and follow the link to create an Android Api Key as shown in my previous maps post.

iii) Don't forget to copy the Android Key you created at the console and paste it to the  google_maps_api.xml


a) Generating the Browser API key

- On your Api Manager, go to Credentials tab from the left panel, All your Api Keys should be enlisted here. In our case, the Android Key that we enabled.



- Click on the Create credentials, which will popup a drop down list.



- Select API key, another popup will appear to prompt you to create a new key,



- Select Browser key, another page will open up, you can choose to rename the key and press Create button to complete. Just leave the other field blank.



- Copy the Api key from the popup that will appear and save it somewhere, will need it too.




- Now in your Credentials, You should have two keys.




b) Enabling Google Places Api for Android and Google Api Web Service  ,

- On your Api Manager, go to Overview tab from the left panel,
- Go to the Google Maps Apis, Click More, to see the Google Places Api for Web Service



- Click on Google Places API Web Service, which will load another page



- Click on the Enable button and go back

- * Follow the above steps to enable Google Places API for Android <Same Procedure>*



>> If you go back to Overview, then click on the Enabled APIs tab, You'll see 3 APIs Enabled



*** That's it, we are done with the Api stuffs, let's head to actual coding ***

2. Android app,

i) Create a New Android Project in android studio and select Scrolling Activity



ii) Import Volley Library; how to import custom library
compile 'com.mcxiaoke.volley:library:1.0.19'

Your build.gradle(Module: App)

apply plugin: 'com.android.application'
android {
    compileSdkVersion 24
    buildToolsVersion "24.0.0"
    defaultConfig {
        applicationId "com.androidmastermind.gplaces"
        minSdkVersion 15
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'),
 'proguard-rules.pro'        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:24.0.0'
    compile 'com.google.android.gms:play-services:9.2.0'
    compile 'com.mcxiaoke.volley:library:1.0.19'
}

iii) Create AppController.java class, this will extend Application. Volley will use this class to make the json request for us.

package com.androidmastermind.gplaces;

import android.app.Application;
import android.text.TextUtils;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;

import static com.androidmastermind.gplaces.AppConfig.TAG;

public class AppController extends Application {

    private RequestQueue mRequestQueue;
    private static AppController mInstance;

    @Override
    public void onCreate() {
        super.onCreate();
        mInstance = this;

    }

    public static synchronized AppController getInstance() {
        return mInstance;
    }

    public RequestQueue getRequestQueue() {
        if (mRequestQueue == null) {
            mRequestQueue = Volley.newRequestQueue(getApplicationContext());
        }
        return mRequestQueue;
    }

    public <T> void addToRequestQueue(Request<T> req, String tag) {
        req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
        getRequestQueue().add(req);
    }

    public <T> void addToRequestQueue(Request<T> req) {
        req.setTag(TAG);
        getRequestQueue().add(req);
    }

    public void cancelPendingRequests(Object tag) {
        if (mRequestQueue != null) {
            mRequestQueue.cancelAll(tag);
        }
    }
}

iv) Create another class, AppConfig.java, this will hold all the references that we will need. also the keys for the json that we will have read from google after querying for the nearby places. Will also hold our Browser API key, you;ll paste it here

package com.androidmastermind.gplaces;

/** * Created by sydney on 6/26/2016. */
public final class AppConfig {

    public static final String TAG = "gplaces";

    public static final String RESULTS = "results";
    public static final String STATUS = "status";

    public static final String OK = "OK";
    public static final String ZERO_RESULTS = "ZERO_RESULTS";
    public static final String REQUEST_DENIED = "REQUEST_DENIED";
    public static final String OVER_QUERY_LIMIT = "OVER_QUERY_LIMIT";
    public static final String UNKNOWN_ERROR = "UNKNOWN_ERROR";
    public static final String INVALID_REQUEST = "INVALID_REQUEST";

    //    Key for nearby places json from google
    public static final String GEOMETRY = "geometry";
    public static final String LOCATION = "location";
    public static final String LATITUDE = "lat";
    public static final String LONGITUDE = "lng";
    public static final String ICON = "icon";
    public static final String SUPERMARKET_ID = "id";
    public static final String NAME = "name";
    public static final String PLACE_ID = "place_id";
    public static final String REFERENCE = "reference";
    public static final String VICINITY = "vicinity";
    public static final String PLACE_NAME = "place_name";

    // remember to change the browser api key
    public static final String GOOGLE_BROWSER_API_KEY =
 "AIzaSyBJvlD3dqnz42r9obhEClc2dEJAdXt9IK8";
    public static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
    public static final int PROXIMITY_RADIUS = 5000;
    // The minimum distance to change Updates in meters
    public static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
    // The minimum time between updates in milliseconds
    public static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
}

- If you wanna test your Browser API key now would be the best time, paste the below link on your browser and rem to change the key with your Browser api key. <Its very imperative that you know how the data is obtained, many other maps and places tutorials don't really show the kind of data your expecting>

https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=-1.291863,36.824487&radius=5000&types=grocery_or_supermarket&sensor=true&key=AIzaSyBJvlD3dqnz42r9obhEClc2dEJAdXt9IK8

**** Sample of the query of the nearby places, The above url will show all the supermarkets around Technical University of Kenya within a radius of 5km <its in json format, and thus where volley comes in handy>****

v) The activity_maps.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/mainCoordinatorLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context=".MapsActivity">

    <fragment
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</android.support.design.widget.CoordinatorLayout>

vi) Finally, lets alter our MapsActivity.java and add some codes for fetching the nearby places and displaying the markers of all the places on the map.

package com.androidmastermind.gplaces;

import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

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

import static com.androidmastermind.gplaces.AppConfig.*;

public class MapsActivity extends AppCompatActivity implements OnMapReadyCallback,
 LocationListener {

    private GoogleMap mMap;
    LocationManager locationManager;
    CoordinatorLayout mainCoordinatorLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (!isGooglePlayServicesAvailable()) {
            return;
        }
        setContentView(R.layout.activity_maps);

        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);

        mainCoordinatorLayout = (CoordinatorLayout) findViewById(R.id.mainCoordinatorLayout);
        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
        if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
            showLocationSettings();
        }
    }

    private void showLocationSettings() {
        Snackbar snackbar = Snackbar
                .make(mainCoordinatorLayout, "Location Error: GPS Disabled!",
 Snackbar.LENGTH_LONG)
                .setAction("Enable", new View.OnClickListener() {
                    @Override                    public void onClick(View v) {

                        startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                    }
                });
        snackbar.setActionTextColor(Color.RED);
        snackbar.setDuration(Snackbar.LENGTH_INDEFINITE);

        View sbView = snackbar.getView();
        TextView textView = (TextView) sbView
.findViewById(android.support.design.R.id.snackbar_text);
        textView.setTextColor(Color.YELLOW);

        snackbar.show();
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

        if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION)
 != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this,
 android.Manifest.permission.ACCESS_COARSE_LOCATION)
 != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        mMap.setMyLocationEnabled(true);
        mMap.getUiSettings().setCompassEnabled(true);
        mMap.getUiSettings().setZoomControlsEnabled(true);

        showCurrentLocation();
    }

    private void showCurrentLocation() {
        Criteria criteria = new Criteria();
        String bestProvider = locationManager.getBestProvider(criteria, true);
        if (ActivityCompat.checkSelfPermission(this,
 android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && 
ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION)
 != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        Location location = locationManager.getLastKnownLocation(bestProvider);

        if (location != null) {
            onLocationChanged(location);
        }
        locationManager.requestLocationUpdates(bestProvider, MIN_TIME_BW_UPDATES,
 MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
    }

    private void loadNearByPlaces(double latitude, double longitude) {
//YOU Can change this type at your own will, e.g hospital, cafe, restaurant.... and see how it all works
        String type = "grocery_or_supermarket";
        StringBuilder googlePlacesUrl = 
new StringBuilder("https://maps.googleapis.com/maps/api/place/nearbysearch/json?");
        googlePlacesUrl.append("location=").append(latitude).append(",").append(longitude);
        googlePlacesUrl.append("&radius=").append(PROXIMITY_RADIUS);
        googlePlacesUrl.append("&types=").append(type);
        googlePlacesUrl.append("&sensor=true");
        googlePlacesUrl.append("&key=" + GOOGLE_BROWSER_API_KEY);

        JsonObjectRequest request = new JsonObjectRequest(googlePlacesUrl.toString(),
 new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject result) {

                Log.i(TAG, "onResponse: Result= " + result.toString());
                parseLocationResult(result);
            }
        },
                new Response.ErrorListener() {
                    @Override                    public void onErrorResponse(VolleyError error) {
                        Log.e(TAG, "onErrorResponse: Error= " + error);
                        Log.e(TAG, "onErrorResponse: Error= " + error.getMessage());
                    }
                });

        AppController.getInstance().addToRequestQueue(request);
    }

    private void parseLocationResult(JSONObject result) {

        String id, place_id, placeName = null, reference, icon, vicinity = null;
        double latitude, longitude;

        try {
            JSONArray jsonArray = result.getJSONArray("results");

            if (result.getString(STATUS).equalsIgnoreCase(OK)) {

                mMap.clear();

                for (int i = 0; i < jsonArray.length(); i++) {
                    JSONObject place = jsonArray.getJSONObject(i);

                    id = place.getString(SUPERMARKET_ID);
                    place_id = place.getString(PLACE_ID);
                    if (!place.isNull(NAME)) {
                        placeName = place.getString(NAME);
                    }
                    if (!place.isNull(VICINITY)) {
                        vicinity = place.getString(VICINITY);
                    }
                    latitude = place.getJSONObject(GEOMETRY).getJSONObject(LOCATION)
.getDouble(LATITUDE);
                    longitude = place.getJSONObject(GEOMETRY).getJSONObject(LOCATION)
.getDouble(LONGITUDE);
                    reference = place.getString(REFERENCE);
                    icon = place.getString(ICON);

                    MarkerOptions markerOptions = new MarkerOptions();
                    LatLng latLng = new LatLng(latitude, longitude);
                    markerOptions.position(latLng);
                    markerOptions.title(placeName + " : " + vicinity);

                    mMap.addMarker(markerOptions);
                }

                Toast.makeText(getBaseContext(), jsonArray.length() + " Supermarkets found!",
 Toast.LENGTH_LONG).show();
            } else if (result.getString(STATUS).equalsIgnoreCase(ZERO_RESULTS)) {
                Toast.makeText(getBaseContext(), "No Supermarket found in 5KM radius!!!",
 Toast.LENGTH_LONG).show();
            }

        } catch (JSONException e) {

            e.printStackTrace();
            Log.e(TAG, "parseLocationResult: Error=" + e.getMessage());
        }
    }

    @Override
    public void onLocationChanged(Location location) {
        double latitude = location.getLatitude();
        double longitude = location.getLongitude();

        LatLng latLng = new LatLng(latitude, longitude);
        mMap.addMarker(new MarkerOptions().position(latLng).title("My Location"));
        mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        mMap.animateCamera(CameraUpdateFactory.zoomTo(15));

        loadNearByPlaces(latitude, longitude);
    }

    @Override
    public void onStatusChanged(String s, int i, Bundle bundle) {
    }

    @Override
    public void onProviderEnabled(String s) {
    }

    @Override
    public void onProviderDisabled(String s) {
    }

    private boolean isGooglePlayServicesAvailable() {
        GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
        int resultCode = apiAvailability.isGooglePlayServicesAvailable(this);
        if (resultCode != ConnectionResult.SUCCESS) {
            if (apiAvailability.isUserResolvableError(resultCode)) {
                apiAvailability.getErrorDialog(this, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST).show();
            } else {
                Log.i(TAG, "This device is not supported.");
                finish();
            }
            return false;
        }
        return true;
    }
}

vi) AndroidManifest.xml file

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.androidmastermind.gplaces">

    <permission android:name="com.androidmastermind.gplaces.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>

    <uses-permission android:name="com.androidmastermind.gplaces.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-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

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

    <application
        android:name=".AppController"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="@string/google_maps_key"/>

        <activity
            android:name=".MapsActivity"
            android:label="@string/title_activity_maps">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>

</manifest>

Running the project.

* First, set a location on the emulator.

a) If GPS is disabled



b) If GPS is enabled in your emulator or phone



***That's it, you've successfully loaded all the nearby supermarkets within the radius of 5km and are updated when a user moves for 10m***


See Also:
* Show User's Current Location



Reactions:

41 comments:

  1. Thank you for the valuable information, but you missed one library to import that is com.android.support:design

    ReplyDelete
  2. thanks for guidance
    had to made some alteration since I was doing from AsyncHttpClient

    ReplyDelete
    Replies
    1. pleasure,
      tho find it easy to use google volley for requests... you should try it too sometime, it can't let you down.

      Delete
  3. Thanks for your help ..but what if I want to search for nearby Petrol pumps , what type should I use?

    ReplyDelete
    Replies
    1. I found the answer myself ...use "gas_station" in type to find nearby fuel pumps.

      Delete
  4. Hey Bro! Thanks for the post. Im facing an error with cannot resolve constructor jsonobjectrequest.

    /*This part of the code is generating the error*/
    JsonObjectRequest request = new JsonObjectRequest(googlePlacesUrl.toString (),
    new Response.Listener () {
    @Override
    public void onResponse (JSONObject result) {

    Log.i (TAG, "onResponse: Result= " + result.toString ());
    parseLocationResult (result);
    }
    },
    new Response.ErrorListener () {
    @Override
    public void onErrorResponse (VolleyError error) {
    Log.e (TAG, "onErrorResponse: Error= " + error);
    Log.e (TAG, "onErrorResponse: Error= " + error.getMessage ());
    }
    });

    AppController.getInstance().addToRequestQueue(request);
    }

    ReplyDelete
    Replies
    1. hello there, make sure in your manifest file you've added your application class in the name attribute, android:name=".AppController" . it should work

      Delete
    2. This comment has been removed by the author.

      Delete
    3. Try this
      JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET,googlePlacesUrl.toString(),null,
      new Response.Listener()

      Delete
  5. List of search keywords you can use are:

    accounting
    airport
    amusement_park
    aquarium
    art_gallery
    atm
    bakery
    bank
    bar
    beauty_salon
    bicycle_store
    book_store
    bowling_alley
    bus_station
    cafe
    campground
    car_dealer
    car_rental
    car_repair
    car_wash
    casino
    cemetery
    church
    city_hall
    clothing_store
    convenience_store
    courthouse
    dentist
    department_store
    doctor
    electrician
    electronics_store
    embassy
    establishment (deprecated)
    finance (deprecated)
    fire_station
    florist
    food (deprecated)
    funeral_home
    furniture_store
    gas_station
    general_contractor (deprecated)
    grocery_or_supermarket (deprecated)
    gym
    hair_care
    hardware_store
    health (deprecated)
    hindu_temple
    home_goods_store
    hospital
    insurance_agency
    jewelry_store
    laundry
    lawyer
    library
    liquor_store
    local_government_office
    locksmith
    lodging
    meal_delivery
    meal_takeaway
    mosque
    movie_rental
    movie_theater
    moving_company
    museum
    night_club
    painter
    park
    parking
    pet_store
    pharmacy
    physiotherapist
    place_of_worship (deprecated)
    plumber
    police
    post_office
    real_estate_agency
    restaurant
    roofing_contractor
    rv_park
    school
    shoe_store
    shopping_mall
    spa
    stadium
    storage
    store
    subway_station
    synagogue
    taxi_stand
    train_station
    transit_station
    travel_agency
    university
    veterinary_care
    zoo

    ReplyDelete
  6. I can't thank you enough for this i really am grateful th@t you wrote this article god bless you.
    Could you suggest me some way to populate a list view with these details of places like place name address distance phone no. And ratings?

    ReplyDelete
    Replies
    1. hai ishmeet im also looking for the same. did you found it? if yes please give me any help

      Delete
    2. I have one ready, ill post it as soon as i can

      Delete
    3. I have one ready, ill post it as soon as i can

      Delete
  7. Thank you my brother.Without this code anything seemed impossible

    ReplyDelete
  8. Hi Kevin I have coded anything as precise as you presented it here,but now I only get a blank screen with the map not showing.Please help me out.Thank you.

    ReplyDelete
    Replies
    1. check your api key, make sure its the browser api key, in the manifest file

      Delete
  9. Thanks alot for this, you're a lifesaver, but how can I populate listview with this informations

    ReplyDelete
  10. Please help me, I had created API Key but can't use it.
    my Key: AIzaSyDv_T_IwvmynsDSAfiOh_XBEFE52GO3dmg
    I had choosen: "HTTP referrers (web sites)" in Key restriction and filled "https://maps.googleapis.com/" in Accept requests from these HTTP referrers (web sites) but I still get "status" : "REQUEST_DENIED" in this link:
    https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=-33.8670,151.1957&radius=500&types=restaurant&key=AIzaSyDv_T_IwvmynsDSAfiOh_XBEFE52GO3dmg
    Did I miss something ? Thank you so much

    ReplyDelete
  11. Location location = locationManager.getLastKnownLocation(bestProvider);
    I always get null in this. Please help me

    ReplyDelete
  12. Not showing the current Location.
    Please help me.

    ReplyDelete
  13. app is working well, thank you. But i like to find out is it possible to use more than one type of places ? if yes, do i just add in the &types in MapActivity.java ?

    ReplyDelete
    Replies
    1. I have answered my own question above. My query now is how do i use your existing code to implement Arraylist to add all the results from google json to a listview with arraylist.

      Delete
    2. i have the codes ready, ill publish as soon as i can

      Delete
  14. Hi sir ae..... I'm doing project on the title smart tour guide.... Already I have created ATM,park,church,etc,. Using navigation drawer... Now I want to find places of interest(famous places) based on current location based on particular radius... Will u help me sir.....

    ReplyDelete
  15. Thank you bro...........
    You are the saviour ....

    This is the best guide ever....

    Now can you tell me how i can i select specific place with its all details....
    And how can i show more then 20 places near me.....

    ReplyDelete
    Replies
    1. to select specific place with all details you'll have to use a model, ill show you in my next tutorial on the maps and recyclerview. simple version is, load all the places in a model arraylist, then select the location depending with the array position

      Delete
  16. im gonna post a tutorial too soon, on how to load current location using fused location, then display the places on recyclerview and google maps, and also display full details of a single place, thanks for your patience

    ReplyDelete
  17. sir i follow your Tutorials but how can i make custom or dynamic in which i can search like Hospital,ATM,police station etc and display it on map, and this one also do not display the required result sir please help me i am beginner

    ReplyDelete
    Replies
    1. you may consider using a spinner, then use onSelectedItemChangeListener, that will handle on any event a user selects a different item from it, after that you can query using the item selected

      Delete
  18. This comment has been removed by the author.

    ReplyDelete
  19. Thank you for sharing such great information. It is informative, can you help me in finding out more detail on Online Practice management software,Dental clinic softwaredentists nearby,i am interested and would like to know more about this field and wanted to understand the basics of Online Practice management software.

    ReplyDelete
    Replies
    1. will email you all the info i have about it

      Delete
  20. Hello there,Your post is great,I got confused on generating the api keys .
    For finding nearby places on Android which Api key do i have to use,coz You are using browser key,that's why i got confused..

    ReplyDelete
  21. This comment has been removed by the author.

    ReplyDelete
  22. This comment has been removed by the author.

    ReplyDelete
  23. Im getting an error that reads cannot resolve symbol "R" in this code and troughout my code

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    if (!isGooglePlayServicesAvailable()) {
    return;
    }
    setContentView(R.layout.activity_maps);

    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
    .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);

    mainCoordinatorLayout = (CoordinatorLayout) findViewById(R.id.mainCoordinatorLayout);
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
    showLocationSettings();

    and its saying "<android.support.design.widget.CoordinatorLayout" is not declared.
    Please help im so confused.

    ReplyDelete
  24. Showing error while importing CoordinatorLayout and Snackbar....
    Plz help!!!!

    ReplyDelete
  25. the number of stores found is always 20 no matter what the radius is...how to get more number of stores if i increased the radius to 20km?

    ReplyDelete