Intento buscar lugares cercanos como bancos, restaurantes, cajeros automáticos dentro del área dibujada en google maps en android

Estoy tratando de buscar lugares cercanos como bancos, restaurantes, cajeros automáticos dentro del área dibujada en google maps en android. Obtengo coordenadas (latitud y longitud) en una matriz, pero no puedo encontrar lugares cercanos por esa matriz. ¿Puede alguien ayudarme? Traté de buscar pero no encontré resultados. ¡Se apreciará gran ayuda!

Este es mi código de área dibujado:

public class MainActivity extends FragmentActivity implements OnTouchListener { private static final String TAG = "polygon"; private GoogleMap mGoogleMap; private View mMapShelterView; private GestureDetector mGestureDetector; private ArrayList mLatlngs = new ArrayList(); private PolylineOptions mPolylineOptions; private PolygonOptions mPolygonOptions; // flag to differentiate whether user is touching to draw or not private boolean mDrawFinished = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mMapShelterView = (View) findViewById(R.id.drawer_view); mGestureDetector = new GestureDetector(this, new GestureListener()); mMapShelterView.setOnTouchListener(this); initilizeMap(); //Contains(null); } private final class GestureListener extends SimpleOnGestureListener { @Override public boolean onDown(MotionEvent e) { return true; } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { return false; } } /** * Ontouch event will draw poly line along the touch points * */ @Override public boolean onTouch(View v, MotionEvent event) { int X1 = (int) event.getX(); int Y1 = (int) event.getY(); Point point = new Point(); point.x = X1; point.y = Y1; LatLng firstGeoPoint = mGoogleMap.getProjection().fromScreenLocation( point); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: break; case MotionEvent.ACTION_MOVE: if (mDrawFinished) { X1 = (int) event.getX(); Y1 = (int) event.getY(); point = new Point(); point.x = X1; point.y = Y1; LatLng geoPoint = mGoogleMap.getProjection() .fromScreenLocation(point); mLatlngs.add(geoPoint); mPolylineOptions = new PolylineOptions(); mPolylineOptions.color(Color.RED); mPolylineOptions.width(3); mPolylineOptions.addAll(mLatlngs); mGoogleMap.addPolyline(mPolylineOptions); **Log.d(TAG, "Latitude and longitude: " + mLatlngs);** } break; case MotionEvent.ACTION_UP: Log.d(TAG, "Poinnts array size " + mLatlngs.size()); mLatlngs.add(firstGeoPoint); mGoogleMap.clear(); mPolylineOptions = null; mMapShelterView.setVisibility(View.GONE); mGoogleMap.getUiSettings().setZoomGesturesEnabled(true); mGoogleMap.getUiSettings().setAllGesturesEnabled(true); mPolygonOptions = new PolygonOptions(); mPolygonOptions.fillColor(0x5500ff00); // mPolygonOptions.fillColor(Color.LTGRAY); mPolygonOptions.strokeColor(Color.RED); mPolygonOptions.strokeWidth(5); mPolygonOptions.addAll(mLatlngs); mGoogleMap.addPolygon(mPolygonOptions); mDrawFinished = false; break; } return mGestureDetector.onTouchEvent(event); } /** * Setting up map * */ private void initilizeMap() { int status = GooglePlayServicesUtil .isGooglePlayServicesAvailable(getApplicationContext()); if (status == ConnectionResult.SUCCESS) { if (mGoogleMap == null) { mGoogleMap = ((SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map)).getMap(); mGoogleMap.setMyLocationEnabled(true); } } else if (GooglePlayServicesUtil.isUserRecoverableError(status)) { // showErrorDialog(status); } else { Toast.makeText(this, "No Support for Google Play Service", Toast.LENGTH_LONG).show(); } } /** * Method gets called on tap of draw button, It prepares the screen to draw * the polygon * * @param view */ public void drawZone(View view) { mGoogleMap.clear(); mLatlngs.clear(); mPolylineOptions = null; mPolygonOptions = null; mDrawFinished = true; mMapShelterView.setVisibility(View.VISIBLE); mGoogleMap.getUiSettings().setScrollGesturesEnabled(false); } public synchronized boolean Contains(Location location) { boolean isInside = false; if (mLatlngs.size() > 0) { LatLng lastPoint = mLatlngs.get(mLatlngs.size() - 1); double x = location.getLongitude(); for (LatLng point : mLatlngs) { double x1 = lastPoint.longitude; double x2 = point.longitude; double dx = x2 - x1; if (Math.abs(dx) > 180.0) { if (x > 0) { while (x1 < 0) x1 += 360; while (x2  0) x1 -= 360; while (x2 > 0) x2 -= 360; } dx = x2 - x1; } if ((x1  x) || (x1 >= x && x2  location.getLatitude()) isInside = !isInside; } lastPoint = point; } } return isInside; } 

Tengo array en mLatlang, ahora quiero cerca de lugares de acuerdo a esas coordenadas, no por mi ubicación actual

Aquí hay algunos códigos de trabajo que usan la API de servicios web de Places, esto debería ayudarlo a obtener la funcionalidad que está buscando.

La documentación general se puede encontrar aquí .

Los tipos soportados de tipos de lugar se pueden encontrar aquí .

El siguiente es un ejemplo simple. Primero, genere su cadena de consulta para la API:

 public StringBuilder sbMethod() { //use your current location here double mLatitude = 37.77657; double mLongitude = -122.417506; 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=" + "restaurant"); sb.append("&sensor=true"); sb.append("&key=******* YOUR API KEY****************"); Log.d("Map", "api: " + sb.toString()); return sb; } 

Aquí está la AsyncTask utilizada para consultar la API de Places:

 private class PlacesTask extends AsyncTask { 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 ParserTask parserTask.execute(result); } } 

Aquí está el método downloadURL() :

 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; } 

ParserTask para analizar el resultado de JSON:

 private class ParserTask extends AsyncTask>> { JSONObject jObject; // Invoked by execute() method of this object @Override protected List> doInBackground(String... jsonData) { List> places = null; Place_JSON placeJson = new Place_JSON(); try { jObject = new JSONObject(jsonData[0]); places = placeJson.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> list) { Log.d("Map", "list size: " + list.size()); // 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 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"); Log.d("Map", "place: " + name); // Getting vicinity String vicinity = hmPlace.get("vicinity"); LatLng latLng = new LatLng(lat, lng); // Setting the position for the marker markerOptions.position(latLng); markerOptions.title(name + " : " + vicinity); markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)); // Placing a marker on the touched position Marker m = mGoogleMap.addMarker(markerOptions); } } } 

Clase Place_JSON que se utiliza en ParserTask :

 public class Place_JSON { /** * Receives a JSONObject and returns a list */ public List> 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> getPlaces(JSONArray jPlaces) { int placesCount = jPlaces.length(); List> placesList = new ArrayList>(); HashMap 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 getPlace(JSONObject jPlace) { HashMap place = new HashMap(); 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; } } 

Por último, invoque el proceso de esta manera:

  StringBuilder sbValue = new StringBuilder(sbMethod()); PlacesTask placesTask = new PlacesTask(); placesTask.execute(sbValue.toString()); 

Resultado:

enter image description here

Primero use esto en su archivo manifest.xml

          

este código puesto en tu actividad …

 package in.wptrafficanalyzer.locationgeocodingv2; import java.io.IOException; import java.util.List; import android.location.Address; import android.location.Geocoder; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.AutoCompleteTextView; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; 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 { GoogleMap googleMap; MarkerOptions markerOptions; LatLng latLng; private AutoCompleteTextView actv_Serch; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); SupportMapFragment supportMapFragment = (SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map); // Getting a reference to the map googleMap = supportMapFragment.getMap(); // Getting reference to btn_find of the layout activity_main Button btn_find = (Button) findViewById(R.id.btn_find); // Defining button click event listener for the find button OnClickListener findClickListener = new OnClickListener() { @Override public void onClick(View v) { // Getting reference to EditText to get the user input location // EditText etLocation = (EditText) // findViewById(R.id.et_location); actv_Serch = (AutoCompleteTextView) findViewById(R.id.actv_Search); // Getting user input location String location = actv_Serch.getText().toString(); if (location != null && !location.equals("")) { new GeocoderTask().execute(location); } } }; // Setting button click event listener for the find button btn_find.setOnClickListener(findClickListener); } @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; } // An AsyncTask class for accessing the GeoCoding Web Service private class GeocoderTask extends AsyncTask> { @Override protected List
doInBackground(String... locationName) { // Creating an instance of Geocoder class Geocoder geocoder = new Geocoder(getBaseContext()); List
addresses = null; try { // Getting a maximum of 3 Address that matches the input text addresses = geocoder.getFromLocationName(locationName[0], 3); } catch (IOException e) { e.printStackTrace(); } return addresses; } @Override protected void onPostExecute(List
addresses) { if (addresses == null || addresses.size() == 0) { Toast.makeText(getBaseContext(), "No Location found", Toast.LENGTH_SHORT).show(); } // Clears all the existing markers on the map googleMap.clear(); // Adding Markers on Google Map for each matching address for (int i = 0; i < addresses.size(); i++) { Address address = (Address) addresses.get(i); // Creating an instance of GeoPoint, to display in Google Map latLng = new LatLng(address.getLatitude(), address.getLongitude()); String addressText = String.format( "%s, %s", address.getMaxAddressLineIndex() > 0 ? address .getAddressLine(0) : "", address .getCountryName()); markerOptions = new MarkerOptions(); markerOptions.position(latLng); markerOptions.title(addressText); googleMap.addMarker(markerOptions); // Locate the first location if (i == 0) googleMap.animateCamera(CameraUpdateFactory .newLatLng(latLng)); } } } }