I want to display multiply markers using values stored in database.But i can only see ma current location in map. May i know what is the mistake i have committed.
public class MainActivity extends FragmentActivity implements LocationListener {
GoogleMap googleMap;
JSONObject jsonobject;
JSONArray jsonarray;
Float Lati,Longi;
ProgressDialog mProgressDialog;
ArrayList<User> emp;
ArrayList<String> Latitude;
ArrayList<String> Longitude;
ArrayList<HashMap<String, Float>> oslist = new ArrayList<HashMap<String, Float>>();
HashMap<String, Float> map = new HashMap<String, Float>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Getting Google Play availability status
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());
// Showing status
if(status!=ConnectionResult.SUCCESS){
int requestCode = 10;
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
dialog.show();
}else { // Google Play Services are available
// Getting reference to the SupportMapFragment of activity_main.xml
SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
// Getting GoogleMap object from the fragment
googleMap = fm.getMap();
// Enabling MyLocation Layer of Google Map
googleMap.setMyLocationEnabled(true);
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
// Getting Current Location
Location location = locationManager.getLastKnownLocation(provider);
new DownJSON().execute();
if(location!=null){
onLocationChanged(location);
}
locationManager.requestLocationUpdates(provider, 20000, 0, this);
}
}
#Override
public void onLocationChanged(Location location) {
TextView tvLocation = (TextView) findViewById(R.id.tv_location);
// Getting latitude of the current location
double latitude = location.getLatitude();
// Getting longitude of the current location
double longitude = location.getLongitude();
// Creating a LatLng object for the current location
LatLng latLng = new LatLng(latitude, longitude);
// Showing the current location in Google Map
googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
// Zoom in the Google Map
googleMap.animateCamera(CameraUpdateFactory.zoomTo(15));
// Setting latitude and longitude in the TextView tv_location
tvLocation.setText("Latitude:" + latitude + ", Longitude:"+ longitude );
}
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
#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;
}
private class DownJSON extends AsyncTask<Void, Void, Void> {
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
float zoom=0;
emp = new ArrayList<User>();
Log.d("Inside DownJson","DownJson");
jsonobject = JSONParser.getJSONfromURLL("JSON URL");
try {
jsonarray = jsonobject.getJSONArray("User");
Log.d("Latitude",jsonarray.toString());
for (int i = 0; i < jsonarray.length(); i++) {
jsonobject = jsonarray.getJSONObject(i);
User e = new User();
Float Lati =Float.valueOf(jsonobject.optString("Latitude"));
Log.d("Latitude",jsonobject.optString("Latitude"));
Float Longi =Float.valueOf(jsonobject.optString("Longitude"));
Log.d("Latitude",jsonobject.optString("Longitude"));
map.put("lati", Lati);
map.put("longi", Longi);
}
}catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
protected void onPostExecute(Void args)
{
for (String key : map.keySet()) {
Log.d("LatituInFor",String.valueOf(map.get("lati")));
Log.d("LongInFor",String.valueOf(map.get("longi")));
LatLng pinLocation = new LatLng(Float.valueOf(map.get("longi")),Float.valueOf(map.get("longi")));
Marker storeMarker = googleMap.addMarker(new MarkerOptions()
.position(pinLocation)
);
}
}
private void drawMarker(LatLng point){
// Creating an instance of MarkerOptions
MarkerOptions markerOptions = new MarkerOptions();
// Setting latitude and longitude for the marker
markerOptions.position(point);
// Adding marker on the Google Map
googleMap.addMarker(markerOptions);
}
}
}
May be here is problem
LatLng pinLocation = new LatLng(Float.valueOf(map.get("longi")),Float.valueOf(map.get("longi")));"
you have used "longi" in (map.get("longi") for both Latitute and Longitude
Related
I want to add marker on map with long click. but it is not working. normal click is working.
This is my code.
public class Map extends FragmentActivity implements LocationListener {
GoogleMap googleMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//show error dialog if GoolglePlayServices not available
if (!isGooglePlayServicesAvailable()) {
finish();
}
setContentView(R.layout.map);
SupportMapFragment supportMapFragment =
(SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap);
// Getting GoogleMap object from the fragment
googleMap = supportMapFragment.getMap();
// Enabling MyLocation Layer of Google Map
googleMap.setMyLocationEnabled(true);
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String bestProvider = locationManager.getBestProvider(criteria, true);
Location location = locationManager.getLastKnownLocation(bestProvider);
if (location != null) {
onLocationChanged(location);
}
locationManager.requestLocationUpdates(bestProvider, 20000, 0, this);
}
#Override
public void onLocationChanged(Location location) {
TextView locationTv = (TextView) findViewById(R.id.latlongLocation);
// Getting latitude of the current location
double latitude = location.getLatitude();
double longitude = location.getLongitude();
LatLng latLng = new LatLng(latitude, longitude);
googleMap.addMarker(new MarkerOptions().position(latLng).title("you are here" ));
// Showing the current location in Google Map
googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
// Zoom in the Google Map
googleMap.animateCamera(CameraUpdateFactory.zoomTo(5));
// Setting latitude and longitude in the TextView tv_location
locationTv.setText("Latitude:" + latitude + ", Longitude:" + longitude);
}
public void onMapClick (LatLng point) {
// Do Something
googleMap =
((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap)).getMap();
googleMap.addMarker(new MarkerOptions()
.position(point)
.title("TouchPoint"));
}
public void onMapLongClick(LatLng point) {
googleMap.addMarker(new MarkerOptions().position(point).title(
point.toString()));
Toast.makeText(getApplicationContext(),
"New marker added#" + point.toString(), Toast.LENGTH_LONG)
.show();
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
private boolean isGooglePlayServicesAvailable() {
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (ConnectionResult.SUCCESS == status) {
return true;
} else {
GooglePlayServicesUtil.getErrorDialog(status, this, 0).show();
return false;
}
}
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
}
How can i solve this ?
In onCreate
googleMap.setOnMapLongClickListener(longClickListener);
Inside the activity
private OnMapLongClickListener longClickListener = new OnMapLongClickListener() {
#Override
public void onMapLongClick(LatLng point) {
//do work }
}
I know that my question is silly, but i'm a bit confused with Intents.From the code below i want to separate it in two classes ShowMap and LocationMap.How can i do this??The fist to contain only the map(FragmentActivity), from where i call the second class in which i want to find the user's current location and return the marker to the map(first activity).Thanks in advance!Here is the class which i want to separate:
public class LocationMap extends FragmentActivity implements LocationListener{
private GoogleMap googleMap;
private LatLng latLng;
TextView tvLocation;
MarkerOptions markerOptions;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.location_maps);
// Getting Google Play availability status
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());
// Showing status
if(status!=ConnectionResult.SUCCESS){ // Google Play Services are not available
int requestCode = 10;
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
dialog.show();
}else { // Google Play Services are available
// Getting reference to the SupportMapFragment of activity_main.xml
SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
// Getting GoogleMap object from the fragment
googleMap = fm.getMap();
//setting zoomIn-zoomOut bar in the screen
googleMap.getUiSettings().setZoomControlsEnabled(true);
// Enabling MyLocation Layer of Google Map
googleMap.setMyLocationEnabled(true);
//googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
// Getting Current Location
Location location = locationManager.getLastKnownLocation(provider);
if(location!=null){
onLocationChanged(location);
new ReverseGeocodingTask(getBaseContext()).execute(latLng);
}
locationManager.requestLocationUpdates(provider, 20000, 0, this);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.location_maps, menu);
// Associate searchable configuration with the SearchView
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.action_search)
.getActionView();
searchView.setSearchableInfo(searchManager
.getSearchableInfo(getComponentName()));
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Take appropriate action for each action item click
switch (item.getItemId()) {
case R.id.action_search:
return true;
case R.id.menu_settings:
// refresh
return true;
default:
return super.onOptionsItemSelected(item);
}
}
#Override
public void onLocationChanged(Location location) {
googleMap.clear();
// Getting latitude of the current location
double latitude = location.getLatitude();
// Getting longitude of the current location
double longitude = location.getLongitude();
// Creating a LatLng object for the current location
latLng = new LatLng(latitude, longitude);
// Showing the current location in Google Map
googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
// Zoom in the Google Map
googleMap.animateCamera(CameraUpdateFactory.zoomTo(10));
markerOptions = new MarkerOptions();
// Setting the position for the marker
markerOptions.position(latLng);
// Executing ReverseGeocodingTask to get Address
new ReverseGeocodingTask(getBaseContext()).execute(latLng);
}
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
Toast.makeText( getApplicationContext(),
"Gps Disabled",Toast.LENGTH_SHORT ).show();
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
private class ReverseGeocodingTask extends AsyncTask<LatLng, Void, String>{
Context mContext;
public ReverseGeocodingTask(Context context){
super();
mContext = context;
}
// Finding address using reverse geocoding
#Override
protected String doInBackground(LatLng... params) {
Geocoder geocoder = new Geocoder(mContext);
double latitude = params[0].latitude;
double longitude = params[0].longitude;
List<Address> addresses = null;
String addressText="";
try {
addresses = geocoder.getFromLocation(latitude, longitude,1);
} catch (IOException e) {
e.printStackTrace();
}
if(addresses != null && addresses.size() > 0 ){
Address address = addresses.get(0);
addressText = String.format("%s, %s, %s",
address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "",
address.getLocality(),
address.getCountryName());
}
return addressText;
}
#Override
protected void onPostExecute(String addressText) {
TextView tvLocation = (TextView) findViewById(R.id.tv_location);
Log.v ("4",addressText );
tvLocation.setText(addressText);
// Setting the title for the marker.
markerOptions.title(addressText);
googleMap.addMarker(markerOptions);
}
}
} }
In my program i am showing multiple markers on map using JSON Web Service, but now i wish to show only locations close to my current position like within 10Kms.
So here i want to know instead of showing all markers, how can i show closest !
I am placing my whole code, which i am using to place marker on Map V2
public class MainActivity extends FragmentActivity implements LocationListener {
private static final String LOG_TAG = "JsOn ErRoR";
private static final String SERVICE_URL = " ";
protected GoogleMap mapB;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setUpMapIfNeeded();
// Getting Google Play availability status
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());
// Showing status
if(status!=ConnectionResult.SUCCESS){ // Google Play Services are not available
int requestCode = 10;
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
dialog.show();
}else { // Google Play Services are available
// Getting reference to the SupportMapFragment of activity_main.xml
SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
// Getting GoogleMap object from the fragment
mapB = fm.getMap();
// Enabling MyLocation Layer of Google Map
mapB.setMyLocationEnabled(true);
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
// Getting Current Location
Location location = locationManager.getLastKnownLocation(provider);
if(location!=null){
onLocationChanged(location);
}
locationManager.requestLocationUpdates(provider, 20000, 0, this);
}
}
#Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
if (mapB == null) {
mapB = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
if (mapB != null) {
setUpMap();
}
}
}
private void setUpMap() {
new Thread(new Runnable() {
public void run() {
try {
retrieveAndAddCities();
} catch (IOException e) {
Log.e(LOG_TAG, "Cannot retrive cities", e);
return;
}
}
}).start();
}
protected void retrieveAndAddCities() throws IOException {
HttpURLConnection conn = null;
final StringBuilder json = new StringBuilder();
try {
// Connect to the web service
URL url = new URL(SERVICE_URL);
conn = (HttpURLConnection) url.openConnection();
InputStreamReader in = new InputStreamReader(conn.getInputStream());
// Read the JSON data into the StringBuilder
int read;
char[] buff = new char[1024];
while ((read = in.read(buff)) != -1) {
json.append(buff, 0, read);
}
} catch (IOException e) {
Log.e(LOG_TAG, "Error connecting to service", e);
throw new IOException("Error connecting to service", e);
} finally {
if (conn != null) {
conn.disconnect();
}
}
// Must run this on the UI thread since it's a UI operation.
runOnUiThread(new Runnable() {
public void run() {
try {
createMarkersFromJson(json.toString());
} catch (JSONException e) {
Log.e(LOG_TAG, "Error processing JSON", e);
}
}
});
}
void createMarkersFromJson(String json) throws JSONException {
JSONArray jsonArray = new JSONArray(json);
System.out.print(json);
List<Marker> markers = new ArrayList<Marker>();
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObj = jsonArray.getJSONObject(i);
System.out.print(jsonObj.getJSONArray("latlng"));
Marker marker = mapB.addMarker(new MarkerOptions()
.title(jsonObj.getString("business_name"))
.position(new LatLng(
jsonObj.getJSONArray("latlng").getDouble(0),
jsonObj.getJSONArray("latlng").getDouble(1)))
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN))
);
markers.add(marker);
}
}
#Override
public void onLocationChanged(Location location) {
// Getting latitude of the current location
double latitude = location.getLatitude();
// Getting longitude of the current location
double longitude = location.getLongitude();
// Creating a LatLng object for the current location
LatLng latLng = new LatLng(latitude, longitude);
// Showing the current location in Google Map
mapB.moveCamera(CameraUpdateFactory.newLatLng(latLng));
// Zoom in the Google Map
mapB.animateCamera(CameraUpdateFactory.zoomTo(15));
}
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
My JSON Looks like:-
[
{
"business_name":"Connaught Place",
"latlng":
[
"28.632777800000000000",
"77.219722199999980000"
]
},
{
"business_name":"Moolchand",
"latlng":
[
"28.568927000000000000",
"77.235073000000060000"
]
}
]
Get your current location. Loop through the locations, determining the distance to each (use Location.distanceBetween to calculate it). Sort the locations by distance. Then only add the N closest markers to your map.
I believe there are number of posts that can tell you about how to calculate the distance between two point, you must try to find your solution before posting it here, well I think this will work for you. its not tested but
void createMarkersFromJson(String json) throws JSONException {
JSONArray jsonArray = new JSONArray(json);
System.out.print(json);
List<Marker> markers = new ArrayList<Marker>();
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObj = jsonArray.getJSONObject(i);
System.out.print(jsonObj.getJSONArray("latlng"));
Location myLocation = new Location("Current location");
myLocation.setLatitude(mapB.getMyLocation().getLatitude());
myLocation.setLongitude(mapB.getMyLocation().getLongitude());
Location markerLocation= new Location("Destination");
double markerLat = jsonObj.getJSONArray("latlng").getDouble(0);
double markerLong = jsonObj.getJSONArray("latlng").getDouble(1);
markerLocation.setLatitude(markerLat);
markerLocation.setLongitude(markerLong);
float distance = myLocation.distanceTo(markerLocation);
final int KM = 1000;
if(distance <= (10*KM)
{
Marker marker = mapB.addMarker(new MarkerOptions()
.title(jsonObj.getString("business_name"))
.position(new LatLng(markerLat,markerLong))
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN))
);
markers.add(marker);
}
}
i am developing one application in that i want to show my current location in the map,it shows but if i change location its shows previous location please tell me in my code mistake
my code
public class GetLatLongForTPActivity extends FragmentActivity implements LocationListener{
GoogleMap _googleMap;
static final LatLng SEC = new LatLng(17.433189,78.502223);
static final LatLng Safilguda = new LatLng(17.464166,78.536156);
static final LatLng Fathe = new LatLng(17.455932,78.450132);
LatLng myPosition;
LatLongDetails latLongDetails = new LatLongDetails();;
private EditText timeEdit;
private Button submitBtn;
private Button cancelBtn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_get_lat_long_for_tp);
timeEdit = (EditText)findViewById(R.id.timeId);
submitBtn = (Button)findViewById(R.id.subId);
/*Intent intent = getIntent();
String anotherLAT=intent.getStringExtra("LAT");
String anotherLNG=intent.getStringExtra("LNG");
*/
ArrayList<HashMap<String, String>> arl = (ArrayList<HashMap<String, String>>)
getIntent().getSerializableExtra("arrayList");
Log.e(" NEW LATLONG1",arl.get(0).toString());
Log.e(" NEW LATLONG2",arl.get(1).toString());
Log.e(" NEW LATLONG3",arl.get(2).toString());
_googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(
R.id.map)).getMap();
if(_googleMap==null){
Toast.makeText(getApplicationContext(), "Google Map Not Available", Toast.LENGTH_LONG).show();
}
LocationManager locationManger = (LocationManager)getSystemService(LOCATION_SERVICE);
Criteria criteria=new Criteria();
Marker perth = _googleMap.addMarker(new MarkerOptions()
.position(SEC)
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))
.flat(true));
/*Marker Safilg = _googleMap.addMarker(new MarkerOptions()
.position(Safilguda)
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))
.flat(true));
Marker Saf = _googleMap.addMarker(new MarkerOptions()
.position(Fathe)
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))
.flat(true));*/
String provider = locationManger.getBestProvider(criteria, true);
Location location = locationManger.getLastKnownLocation(provider);
if(location!=null){
double latitude = location.getLatitude();
double langitude = location.getLongitude();
latLongDetails.setLat(latitude);
latLongDetails.setLongi(langitude);
Log.e("lat",""+ latLongDetails.getLat());
Log.e("long", ""+latLongDetails.getLongi());
LatLng latlang = new LatLng(latitude, langitude);
LatLngBounds curScreen = _googleMap.getProjection().getVisibleRegion().latLngBounds;
curScreen.contains(latlang);
myPosition = new LatLng(latitude, langitude);
_googleMap.moveCamera(CameraUpdateFactory.newLatLng(myPosition));
_googleMap.addMarker(new MarkerOptions().position(myPosition).title("start"));
//_googleMap.setOnMarkerClickListener(GetLatLongForTPActivity.this);
submitBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
String
clreatime=timeEdit.getText().toString().trim();
latLongDetails.setClearTime(clreatime);
Log.e("time",
latLongDetails.getClearTime());
new
SendLatLongValAsync(GetLatLongForTPActivity.this).execute(latLongDetails);
}
});
}
}
#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;
}
#Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
}
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
Setup your Activity like below:
public class BasicMapActivity_new extends FragmentActivity implements LocationListener {
private GoogleMap mMap;
private LocationManager locationManager;
private String provider;
Double Latitude,longitude;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.basic_demo);
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map2)).getMap();
mMap.setMyLocationEnabled(true);
LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
boolean enabledGPS = service
.isProviderEnabled(LocationManager.GPS_PROVIDER);
boolean enabledWiFi = service
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!enabledGPS) {
Toast.makeText(BasicMapActivity_new.this, "GPS signal not found", Toast.LENGTH_LONG).show();
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
else if(!enabledWiFi){
Toast.makeText(BasicMapActivity_new.this, "Network signal not found", Toast.LENGTH_LONG).show();
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the locatioin provider -> use
// default
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
// Initialize the location fields
if (location != null) {
onLocationChanged(location);
} else {
//do something
}
setUpMap();
}
#Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates(this);
}
#Override
protected void onResume() {
super.onResume();
locationManager.requestLocationUpdates(provider, 400, 1, this);
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map2))
.getMap();
mMap.setMyLocationEnabled(true);
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
private void setUpMap() {
mMap.getUiSettings().setCompassEnabled(true);
mMap.getUiSettings().setTiltGesturesEnabled(true);
mMap.getUiSettings().setRotateGesturesEnabled(true);
mMap.getUiSettings().setScrollGesturesEnabled(true);
mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.getUiSettings().setZoomGesturesEnabled(true);
}
Marker startPerc=null;
Location old_one;
#Override
public void onLocationChanged(Location location) {
double lat = location.getLatitude();
double lng = location.getLongitude();
LatLng coordinate = new LatLng(lat, lng)
startPerc = mMap.addMarker(new MarkerOptions()
.position(coordinate)
.title("Current Location")
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE)));
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(coordinate, 18.0f))
}
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
And do not forget to add permission into manifest.xml file
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
You have used getLastKnownLocation() method while fetching the location details. This method always returns the last know co-ordinates. So, I suggest you to commenting this line Location location = locationManger.getLastKnownLocation(provider); from your code. Then it will run properly.
To update your location you have to register your Location Listener to location manager. And use override method onLocationChanged() to get latest location.
Please refer http://developer.android.com/guide/topics/location/strategies.html
I'd like to know how can I show a route contained in a KML file on Google Maps V2?
I'm able to extract the values of the filed "coordinates" in the KML file, but I don't know why my class doen't show the path into the map component.
This is my class:
public class Mappa extends FragmentActivity implements LocationListener {
private GoogleMap googleMap;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mappa);
// Getting Google Play availability status
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());
if(status != ConnectionResult.SUCCESS) {
int requestCode = 10;
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
dialog.show();
}
else {
// Getting reference to the SupportMapFragment of activity_main.xml
SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
// Getting GoogleMap object from the fragment
googleMap = fm.getMap();
// Enabling MyLocation Layer of Google Map
googleMap.setMyLocationEnabled(true);
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
// Getting Current Location
Location location = locationManager.getLastKnownLocation(provider);
if(location!=null){
onLocationChanged(location);
}
locationManager.requestLocationUpdates(provider, 20000, 0, this);
new LoadPath().execute(Environment.getExternalStorageDirectory().getPath() + "FILE.kml");
}
}
#Override
public void onLocationChanged(Location location) {
// Getting latitude of the current location
double latitude = location.getLatitude();
// Getting longitude of the current location
double longitude = location.getLongitude();
// Creating a LatLng object for the current location
LatLng latLng = new LatLng(latitude, longitude);
// Showing the current location in Google Map
googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
// Zoom in the Google Map
googleMap.animateCamera(CameraUpdateFactory.zoomTo(15));
}
#Override
public vo id onProviderDisabled(String provider) { }
#Override
public void onProviderEnabled(String provider) { }
#Override
public void onStatusChanged(String provider, int status, Bundle extras) { }
private class LoadPath extends AsyncTask<String, Void, Void>{
Vector<PolylineOptions> path;
Vector<Vector<LatLng>> path_fragment;
Vector<Polyline> lines;
#Override
p rotected void onPreExecute() {
super.onPreExecute();
path_fragment = new Vector<Vector<LatLng>>();
path = new Vector <PolylineOptions>();
lines = new Vector<Polyline>();
}
#Override
protected Void doInBackground(String... params) {
try {
InputStream inputStream = new FileInputStream(params[0]);
DocumentBuilder docBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document document = docBuilder.parse(inputStream);
NodeList listCoordinateTag = null;
if (document == null) {
return null;
}
listCoordinateTag = document.getElementsByTagName("coordinates");
for (int i = 0; i < listCoordinateTag.getLength(); i++) {
String coordText = listCoordinateTag.item(i).getFirstChild().getNodeValue().trim();
String[] vett = coordText.split("\\ ");
Vector<LatLng> temp = new Vector<LatLng>();
for(int j=0; j < vett.length; j++){
temp.add(new LatLng(Double.parseDouble(vett[j].split("\\,")[0]),Double.parseDouble(vett[j].split("\\,")[1])));
}
path_fragment.add(temp);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
googleMap.clear();
for(int i=0; i < path_fragment.size(); i++){
// Poliline options
PolylineOptions temp = new PolylineOptions();
for(int j=0; j< path_fragment.get(i).size(); j++)
temp.add(path_fragment.get(i).get(j));
path.add(temp);
}
for(int i = 0; i < path.size(); i++)
lines.add(googleMap.addPolyline(path.get(i)));
for(int i = 0; i < lines.size(); i++){
lines.get(i).setWidth(4);
lines.get(i).setColor(Color.RED);
lines.get(i).setGeodesic(true);
lines.get(i).setVisible(true);
}
}
}
}
In this way, I can get all the different coordinates int the following way:
Latitude - Longitude - Altitude
xxxxxxxx - xxxxxxxxx - xxxxxxxx
yyyyyyyy - yyyyyyyyy - yyyyyyyy
zzzzzzzz - zzzzzzzzz - zzzzzzzz
But I'm not able to show them on the map.
Can you help me please?
I found the problem from myself!
In the code above the Longitude and the Latitude are exchanged...
This is the right thing to do in the AsyncTask class:
temp.add(new LatLng(Double.parseDouble(vett[j].split("\\,")[**1**]),Double.parseDouble(vett[j].split("\\,")[**0**])));
IN A KML FILE THE COORDINATES ARE GIVEN IN THIS WAY LONGITUDE - LATITUDE - ALTITUDE this is why I exchanged the indexes!
Sorry for the question!