我创建了这个脚本，用于抓住我附近的地方。但我有问题，我认为这个问题是得到许可的。 该脚本不会分配我当前的位置和位置。
我在这里发布源代码：
private void updatePlaces() {
//get location manager
locMan = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
//get last location
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
Location lastLoc = locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
double lat = lastLoc.getLatitude();
double lng = lastLoc.getLongitude();
//create LatLng
LatLng lastLatLng = new LatLng(lat, lng);
//remove any existing marker
if (userMarker != null) userMarker.remove();
//create and set marker properties
userMarker = theMap.addMarker(new MarkerOptions()
.position(lastLatLng)
.title("You are here")
.icon(BitmapDescriptorFactory.fromResource(userIcon))
.snippet("Your last recorded location"));
//move to location
theMap.animateCamera(CameraUpdateFactory.newLatLng(lastLatLng), 3000, null);
//build places query string
String placesSearchStr = "https://maps.googleapis.com/maps/api/place/nearbysearch/" +
"json?location=" + lat + "," + lng +
"&radius=1000&sensor=true" +
"&types=food|bar|store|museum|art_gallery" +
"&key=AIzaSyBUMhJcPA2qfqWL3Rx-klseRLhi7OMP4Lk";//ADD KEY
//execute query
new GetPlaces().execute(placesSearchStr);
locMan.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 30000, 100, (android.location.LocationListener) this);
}
private class GetPlaces extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... placesURL) {
//fetch places
//build result as string
StringBuilder placesBuilder = new StringBuilder();
//process search parameter string(s)
for (String placeSearchURL : placesURL) {
HttpClient placesClient = new DefaultHttpClient();
try {
//try to fetch the data
//HTTP Get receives URL string
HttpGet placesGet = new HttpGet(placeSearchURL);
//execute GET with Client - return response
HttpResponse placesResponse = placesClient.execute(placesGet);
//check response status
StatusLine placeSearchStatus = placesResponse.getStatusLine();
//only carry on if response is OK
if (placeSearchStatus.getStatusCode() == 200) {
//get response entity
HttpEntity placesEntity = placesResponse.getEntity();
//get input stream setup
InputStream placesContent = placesEntity.getContent();
//create reader
InputStreamReader placesInput = new InputStreamReader(placesContent);
//use buffered reader to process
BufferedReader placesReader = new BufferedReader(placesInput);
//read a line at a time, append to string builder
String lineIn;
while ((lineIn = placesReader.readLine()) != null) {
placesBuilder.append(lineIn);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
return placesBuilder.toString();
}
//process data retrieved from doInBackground
protected void onPostExecute(String result) {
//parse place data returned from Google Places
//remove existing markers
if (placeMarkers != null) {
for (int pm = 0; pm < placeMarkers.length; pm++) {
if (placeMarkers[pm] != null)
placeMarkers[pm].remove();
}
}
try {
//parse JSON
//create JSONObject, pass stinrg returned from doInBackground
JSONObject resultObject = new JSONObject(result);
//get "results" array
JSONArray placesArray = resultObject.getJSONArray("results");
//marker options for each place returned
places = new MarkerOptions[placesArray.length()];
//loop through places
for (int p = 0; p < placesArray.length(); p++) {
//parse each place
//if any values are missing we won't show the marker
boolean missingValue = false;
LatLng placeLL = null;
String placeName = "";
String vicinity = "";
int currIcon = otherIcon;
try {
//attempt to retrieve place data values
missingValue = false;
//get place at this index
JSONObject placeObject = placesArray.getJSONObject(p);
//get location section
JSONObject loc = placeObject.getJSONObject("geometry")
.getJSONObject("location");
//read lat lng
placeLL = new LatLng(Double.valueOf(loc.getString("lat")),
Double.valueOf(loc.getString("lng")));
//get types
JSONArray types = placeObject.getJSONArray("types");
//loop through types
for (int t = 0; t < types.length(); t++) {
//what type is it
String thisType = types.get(t).toString();
//check for particular types - set icons
if (thisType.contains("food")) {
currIcon = foodIcon;
break;
} else if (thisType.contains("bar")) {
currIcon = drinkIcon;
break;
} else if (thisType.contains("store")) {
currIcon = shopIcon;
break;
}
}
//vicinity
vicinity = placeObject.getString("vicinity");
//name
placeName = placeObject.getString("name");
} catch (JSONException jse) {
Log.v("PLACES", "missing value");
missingValue = true;
jse.printStackTrace();
}
//if values missing we don't display
if (missingValue) places[p] = null;
else
places[p] = new MarkerOptions()
.position(placeLL)
.title(placeName)
.icon(BitmapDescriptorFactory.fromResource(currIcon))
.snippet(vicinity);
}
} catch (Exception e) {
e.printStackTrace();
}
if (places != null && placeMarkers != null) {
for (int p = 0; p < places.length && p < placeMarkers.length; p++) {
//will be null if a value was missing
if (places[p] != null)
placeMarkers[p] = theMap.addMarker(places[p]);
}
}
}
}
@Override
protected void onResume() {
super.onResume();
if (theMap != null) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
locMan.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 30000, 100, (android.location.LocationListener) this);
}
}
@Override
protected void onPause() {
super.onPause();
if (theMap != null) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
locMan.removeUpdates((android.location.LocationListener) this);
}
}
我不知道如何解决这个问题