我正在创建一个地图应用程序来显示附近的所有药店和医院。它没有显示所有药房和医院。请帮忙？我试图降低半径，我还尝试将附近搜索添加到我的 PLACES_SEARCH_URL。这是使用 Android Google Maps API V2 和 Google Places API。这是我的代码：我的 Google 地方信息搜索 java：
@SuppressWarnings("deprecation")
public class GooglePlaces {
/** Global instance of the HTTP transport. */
private static final HttpTransport HTTP_TRANSPORT = new NetHttpTransport();
// Google API Key
private static final String API_KEY = "";
// Google Places serach url's
private static final String PLACES_SEARCH_URL = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?";
private static final String PLACES_TEXT_SEARCH_URL = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?";
private static final String PLACES_DETAILS_URL = "https://maps.googleapis.com/maps/api/place/details/json?";
private double _latitude;
private double _longitude;
private double _radius;
/**
* Searching places
* @param latitude - latitude of place
* @params longitude - longitude of place
* @param radius - radius of searchable area
* @param types - type of place to search
* @return list of places
* */
public PlacesList search(double latitude, double longitude, double radius, String types)
throws Exception {
this._latitude = latitude;
this._longitude = longitude;
this._radius = radius;
try {
HttpRequestFactory httpRequestFactory = createRequestFactory(HTTP_TRANSPORT);
HttpRequest request = httpRequestFactory
.buildGetRequest(new GenericUrl(PLACES_SEARCH_URL));
request.getUrl().put("key", API_KEY);
request.getUrl().put("location", _latitude + "," + _longitude);
request.getUrl().put("radius", _radius); // in meters
request.getUrl().put("sensor", "false");
if(types != null)
request.getUrl().put("types", types);
PlacesList list = request.execute().parseAs(PlacesList.class);
// Check log cat for places response status
if(list.next_page_token != null || list.next_page_token != "")
{
Thread.sleep(4000);
/*Since the token can be used after a short time it has been generated*/
request.getUrl().put("pagetoken",list.next_page_token);
PlacesList temp = request.execute().parseAs(PlacesList.class);
list.results.addAll(temp.results);
if(temp.next_page_token!=null||temp.next_page_token!="")
{
Thread.sleep(4000);
request.getUrl().put("pagetoken",temp.next_page_token);
PlacesList tempList = request.execute().parseAs(PlacesList.class);
list.results.addAll(tempList.results);
}
}
Log.d("Places Status", "" + list.status);
return list;
} catch (HttpResponseException e) {
Log.e("Error:", e.getMessage());
return null;
}
}
/**
* Searching single place full details
* @param refrence - reference id of place
* - which you will get in search api request
* */
public PlaceDetails getPlaceDetails(String reference) throws Exception {
try {
HttpRequestFactory httpRequestFactory = createRequestFactory(HTTP_TRANSPORT);
HttpRequest request = httpRequestFactory
.buildGetRequest(new GenericUrl(PLACES_DETAILS_URL));
request.getUrl().put("key", API_KEY);
request.getUrl().put("reference", reference);
request.getUrl().put("sensor", "false");
PlaceDetails place = request.execute().parseAs(PlaceDetails.class);
return place;
} catch (HttpResponseException e) {
Log.e("Error in Perform Details", e.getMessage());
throw e;
}
}
/**
* Creating http request Factory
* */
public static HttpRequestFactory createRequestFactory(
final HttpTransport transport) {
return transport.createRequestFactory(new HttpRequestInitializer() {
public void initialize(HttpRequest request) {
GoogleHeaders headers = new GoogleHeaders();
headers.setApplicationName("AndroidHive-Places-Test");
request.setHeaders(headers);
JsonHttpParser parser = new JsonHttpParser(new JacksonFactory());
request.addParser(parser);
}
});
}
public static String getPlacesTextSearchUrl() {
return PLACES_TEXT_SEARCH_URL;
}
}
我的主要活动java：
public class MainActivity extends Activity {
// flag for Internet connection status
Boolean isInternetPresent = false;
// Connection detector class
ConnectionDetector cd;
// Alert Dialog Manager
AlertDialogManager alert = new AlertDialogManager();
// Google Places
GooglePlaces googlePlaces;
// Places List
PlacesList nearPlaces;
// GPS Location
GPSTracker gps;
// Button
Button btnList;
Button btnHospital;
Button btnPharmacy;
// Progress dialog
ProgressDialog pDialog;
// Places Listview
ListView lv;
// Google Map
private GoogleMap googleMap;
double latitude;
double longitude;
// ListItems data
ArrayList<HashMap<String, String>> placesListItems = new ArrayList<HashMap<String,String>>();
// KEY Strings
public static String KEY_REFERENCE = "reference"; // id of the place
public static String KEY_NAME = "name"; // name of the place
public static String KEY_VICINITY = "vicinity"; // Place area name
ListAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cd = new ConnectionDetector(getApplicationContext());
// Check if Internet present
isInternetPresent = cd.isConnectingToInternet();
if (!isInternetPresent) {
// Internet Connection is not present
alert.showAlertDialog(MainActivity.this, "Internet Connection Error",
"Please connect to working Internet connection", false);
// stop executing code by return
return;
}
// creating GPS Class object
gps = new GPSTracker(this);
// check if GPS location can get
if (gps.canGetLocation()) {
Log.d("Your Location", "latitude:" + gps.getLatitude() + ", longitude: " + gps.getLongitude());
} else {
// Can't get user's current location
alert.showAlertDialog(MainActivity.this, "GPS Status",
"Couldn't get location information. Please enable GPS",
false);
// stop executing code by return
return;
}
// Getting listview
lv = (ListView) findViewById(R.id.list);
// button show on map
Button btnHospital = (Button) findViewById(R.id.buttonHospital);
Button btnList = (Button) findViewById(R.id.buttonList);
Button btnPharmacy = (Button) findViewById(R.id.buttonPharmacy);
// calling background Async task to load Google Places
// After getting places from Google all the data is shown in listview
new LoadPlaces().execute();
/** Button click event for shown on map */
btnHospital.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(MainActivity.this,
HospitalActivity.class);
// Sending user current geo location
// i.putExtra("user_latitude", Double.toString(gps.getLatitude()));
// i.putExtra("user_longitude", Double.toString(gps.getLongitude()));
// passing near places to map activity
i.putExtra("near_places", nearPlaces);
// staring activity
startActivity(i);
}
});
/** Button click event for shown on map */
btnPharmacy.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(MainActivity.this,
PharmacyActivity.class);
// Sending user current geo location
// i.putExtra("user_latitude", Double.toString(gps.getLatitude()));
// i.putExtra("user_longitude", Double.toString(gps.getLongitude()));
// passing near places to map activity
i.putExtra("near_places", nearPlaces);
// staring activity
startActivity(i);
}
});
/** Button click event for shown on map */
btnList.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(MainActivity.this,
DisplayPlacesListActivity.class);
// Sending user current geo location
// i.putExtra("user_latitude", Double.toString(gps.getLatitude()));
// i.putExtra("user_longitude", Double.toString(gps.getLongitude()));
// passing near places to map activity
i.putExtra("near_places", nearPlaces);
// staring activity
startActivity(i);
}
});
/**
* ListItem click event
* On selecting a listitem SinglePlaceActivity is launched
* */
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String reference = ((TextView) view.findViewById(R.id.reference)).getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),
SinglePlaceActivity.class);
// Sending place refrence id to single place activity
// place refrence id used to get "Place full details"
in.putExtra(KEY_REFERENCE, reference);
startActivity(in);
}
});
}
/**
* Background Async Task to Load Google places
* */
class LoadPlaces extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage(Html.fromHtml("<b>Search</b><br/>Loading Places..."));
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting Places JSON
* */
protected String doInBackground(String... args) {
// creating Places class object
googlePlaces = new GooglePlaces();
try {
// Separeate your place types by PIPE symbol "|"
// If you want all types places make it as null
// Check list of types supported by google
//
String types = "hospital|pharmacy"; // Listing places only cafes, restaurants
// Radius in meters - increase this value if you don't find any places
double radius = 50000; // 90000 meters
// get nearest places
nearPlaces = googlePlaces.search(gps.getLatitude(),
gps.getLongitude(), radius, types);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* and show the data in UI
* Always use runOnUiThread(new Runnable()) to update UI from background
* thread, otherwise you will get error
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed Places into LISTVIEW
* */
// Get json response status
String status = nearPlaces.status;
// Check for all possible status
if(status.equals("OK")){
// Successfully got places details
if (nearPlaces.results != null) {
// loop through each place
for (Place p : nearPlaces.results) {
HashMap<String, String> map = new HashMap<String, String>();
// Place reference won't display in listview - it will be hidden
// Place reference is used to get "place full details"
map.put(KEY_REFERENCE, p.reference);
// Place name
map.put(KEY_NAME, p.name);
// adding HashMap to ArrayList
placesListItems.add(map);
}
// Adding data into listview
// lv.setAdapter(adapter);
}
}
else if(status.equals("ZERO_RESULTS")){
// Zero results found
alert.showAlertDialog(MainActivity.this, "Near Places",
"Sorry no places found. Try to change the types of places",
false);
}
else if(status.equals("UNKNOWN_ERROR"))
{
alert.showAlertDialog(MainActivity.this, "Places Error",
"Sorry unknown error occured.",
false);
}
else if(status.equals("OVER_QUERY_LIMIT"))
{
alert.showAlertDialog(MainActivity.this, "Places Error",
"Sorry query limit to google places is reached",
false);
}
else if(status.equals("REQUEST_DENIED"))
{
alert.showAlertDialog(MainActivity.this, "Places Error",
"Sorry error occured. Request is denied",
false);
}
else if(status.equals("INVALID_REQUEST"))
{
alert.showAlertDialog(MainActivity.this, "Places Error",
"Sorry error occured. Invalid Request",
false);
}
else
{
alert.showAlertDialog(MainActivity.this, "Places Error",
"Sorry error occured.",
false);
}
}
});
try {
// Loading map
initilizeMap();
} catch (Exception e) {
e.printStackTrace();
}
double lat;
double lng;
lat = gps.getLatitude();
lng = gps.getLongitude();
// Show user’s current location on the map
// create marker
MarkerOptions markerC = new MarkerOptions().position(new LatLng(lat,lng));
// Changing marker icon
markerC.icon(BitmapDescriptorFactory.fromResource(R.drawable.marker_grey));
// adding marker
googleMap.addMarker(markerC);
CameraPosition cameraPosition = new CameraPosition.Builder().target(
new LatLng(lat,lng)).zoom(10).build();
//Double.toString(gps.getLongitude()
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
// My location button will be used to move map to your current location
googleMap.getUiSettings().setMyLocationButtonEnabled(false);
// check for null in case it is null
if (nearPlaces.results != null) {
// loop through all the places
for (Place place : nearPlaces.results) {
latitude = place.geometry.location.lat; // latitude
longitude = place.geometry.location.lng; // longitude
// create marker
MarkerOptions markerP = new MarkerOptions().position(new LatLng(latitude, longitude)).title(place.name + ", " + place.vicinity);
if (place.types.get(0).equals("hospital")) {
// Changing marker icon
markerP.icon(BitmapDescriptorFactory.fromResource(R.drawable.redcross3));
}
else
{
markerP.icon(BitmapDescriptorFactory.fromResource(R.drawable.rxblue2));
}
// adding marker
googleMap.addMarker(markerP);
}
}
}
}
/**
* function to load map. If map is not created it will create it for you
* */
private void initilizeMap() {
if (googleMap == null) {
googleMap = ((MapFragment) getFragmentManager().findFragmentById(
R.id.map)).getMap();
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getApplicationContext(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
}
@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;
}
}