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POGoogle Maps v2 giving wrong location
 

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  1. POGoogle Maps v2 giving wrong location
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    <p>Whenever I try and use the set Marker button, a marker is set up but just in the wrong location. When I hit the button provided by googleMap.setMyLocationEnabled(true) the map moves to the blue dot in the exact position. How come it gets the current location and i'm getting a random location? </p> <pre><code>package com.example.googlemaps; //import java.io.IOException; //import java.util.List; 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; //import android.location.Address; import android.location.Criteria; //import android.location.Geocoder; import android.location.Location; import android.location.LocationManager; import android.os.Bundle; //import android.app.Activity; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.support.v4.app.FragmentActivity; public class MainActivity extends FragmentActivity { private GoogleMap googleMap; double currentLat, currentLong; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setUpMapIfNeeded(); Button setLocMarker = (Button)findViewById(R.id.set_marker); setLocMarker.setOnClickListener(setMarkerLocation); } private OnClickListener setMarkerLocation = new OnClickListener(){ public void onClick(View v) { setMarker(currentLat, currentLong); } }; private void setUpMapIfNeeded(){ // Do a null check to confirm that we have not already instantiated the map. if(googleMap == null){ //Try to obtain the map from the SupportMapFragment googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap(); //check if we were successful in obtaining the map if(googleMap != null){ setUpMap(); } } } private void setUpMap() { getCurrentLocation(); //set map type googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID ); //creates a LatLng object for current location LatLng latLng = new LatLng(currentLat, currentLong); //show the current location in Google Map googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); //Zoom in the Google Map googleMap.animateCamera(CameraUpdateFactory.zoomTo(20)); //setMarker(latitude, longitude); } public void getCurrentLocation() { //Enable MyLocation Layer of Google Map googleMap.setMyLocationEnabled(true); //Get LocationManager object from System Service LOCATION_SERVICE LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); //Create a criteria object to retrieve provider Criteria criteria = new Criteria(); //Get the name of the best provider String provider = locationManager.getBestProvider(criteria, true); //Get Current Location Location myLocation = locationManager.getLastKnownLocation(provider); //Get latitude of current location currentLat = myLocation.getLatitude(); //Get longitude of current location currentLong = myLocation.getLongitude(); } public void setMarker(double latitude, double longitude){ googleMap.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title("Your set Marker!")); } // public void getLocFromAddress(String address){ // // final Geocoder geoCoder = new Geocoder(); // // // try{ // List&lt;Address&gt; addresses = geoCoder.getFromLocationName(address, 1); // if(addresses.size() &gt; 0){ // double latitude = addresses.get(0).getLatitude(); // double longitude = addresses.get(0).getLongitude(); // } // }catch(IOException e){ // // } // // // // } @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; } } </code></pre>
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    1. PTQuestion
    1. USPratik Shelar
    1. USuser2819738
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      1. POGoogle Maps v2 giving wrong location
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COplease elaborate
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      1. POGoogle Maps v2 giving wrong location
      1. USDr. aNdRO
    2. COtry calling "getCurrentLocation" right before you set the marker. It takes some time for location provider to narrow in right where you are.
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      1. POGoogle Maps v2 giving wrong location
      1. USJohnny Z
    3. CODr.aNdRO: I can get but here is the basic problem. When I open the app on my cell phone it brings up a map at some random location say in a middle of a farm field. If I click the set Marker button there, I get the marker exactly where the location is on the screen, except the location is not where I am actually located. So for some reason when getLocation is called, it is getting a location that is not correct. Now if I hit the button provided by setMyLocationEnabled(true) then the map focuses on the blue dot which is my exact location. I'm assuming it's in my getLocation method.
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      1. POGoogle Maps v2 giving wrong location
      1. USuser2819738
 

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