Develop Reference

How to setup Google Maps API and Markers correctly

I have recently started working on an android application that includes the GPS tracking of the user's position.
For that purpose I have gone through Google's guide to setting up the GoogleMaps API for Android and I have (to my knowledge) fully understood the steps it took me to get here including the correct API_KEY and the SHA1 Footprint for the debug version of google maps.
The included code sends a request for the map information to google's API and upon loading fully sets up the map and places a marker in Sydney.
But it doesn't place the marker. Or move the maps interface to Sydney. It just shows the map and appears to be centering itself around africas west-coast every time for some reason.
Here's how far i've gotten in the Java Activity code:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pkw__route__content__gps);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
try {
mapFragment.getMapAsync(this);
}
catch(NullPointerException npe){
npe.printStackTrace();
}
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Add a marker in Sydney, Australia, and move the camera.
LatLng sydney = new LatLng(-34, 151);
current = mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}
The fragment looks as follows:
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="257dp"
android:layout_height="224dp"
android:layout_marginStart="72dp"
android:layout_marginTop="15dp"
android:layout_marginEnd="72dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:context=".MapsActivity" />
I have added the API key to the Manifest in a tag called "com.google.android.geo.API_KEY". I will not post it in here for obvious reasons.
As said, the Map initializes correctly but the Markers are not placed and the moveCamera call is also not executed correctly
EDIT:
I think this question needs some more backstory, I am using the Map inside a fragment which is integrated into another activity.
The reason why I think this is important is because I have tried to start the map activity through an intent in which case it will fully load up, place markers and work interactively as it should. Because all of this is in the onCreate() method. How do I do this without having to invoke the Activity and stop the other one?

The map is not loaded when onMapReady(GoogleMap googleMap) is called. You have to wait for the OnMapLoadedCallback Event.
You have set a OnMapLoadedCallback to the map in onMapReady(GoogleMap googleMap) and set the marker and zoom the map to the location in this callback.

I need to show World map with GroundOverlay on map with animation

I need to show world map on my application.
I tried to use MapView and set liteMode= true and zoomLevel=1 but its not working as i need. Also groundOverlay not supported in liteMode and i need to show multiple groundOverlay on WorldMap.
can anyone know about it?
Please refere below link i need to show full world map like this.
https://upload.wikimedia.org/wikipedia/commons/b/b0/World_location_map_%28equirectangular_180%29.svg
Below code i done :
<com.google.android.gms.maps.MapView
android:id="#id/mapView"
android:layout_width="match_parent"
android:layout_height="#dimen/dp_180"
map:liteMode="true"
map:cameraZoom="1"
map:mapType="normal"
/>
In my Java Class
#Override
public void onMapReady(GoogleMap googleMap) {
if (googleMap != null) {
this.googleMap = googleMap;
this.googleMap.getUiSettings().setCompassEnabled(false);
this.googleMap.getUiSettings().setAllGesturesEnabled(false);
this.googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
this.googleMap.setMapStyle(MapStyleOptions.loadRawResourceStyle(getContext(), R.raw.style_json));
this.googleMap.getUiSettings().setMapToolbarEnabled(false);
this.googleMap.getUiSettings().setCompassEnabled(false);
this.googleMap.getUiSettings().setScrollGesturesEnabled(false);
}
In this is added zoomLevel=1 but in google map its not showing world map as like above image link i shared.

CameraPosition cameraPosition = new CameraPosition.Builder().
target(YourLocationPoint).
tilt(60).
zoom(15).
bearing(0).
build();
myMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
You can use tilt and bearing for achieving same Doc

Set style for Google map , in onMapReady of your activity.
googleMap.setMapStyle(MapStyleOptions.loadRawResourceStyle(getActivity(), R.raw.customized_map_style));
you need to download the style. please go through below link
https://developers.google.com/maps/documentation/android-sdk/styling
update the styles as you wish.

How to add mapviews in listview? Android

I want to display multiple maps in my layout.
In my fragment I have a list view, in the list view item I have a mapView
<com.google.android.gms.maps.MapView
android:id="#+id/map_view"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
In the adapter file, in my get view method I do :
holder.mapView.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(GoogleMap googleMap) {
LatLng sydney = new LatLng(-33.852, 151.211);
googleMap.addMarker(new MarkerOptions().position(sydney)
.title("Marker in Sydney"));
googleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
holder.mapView.onResume();
}
});
But nothing shows up.
I have created a google maps API key, and added the following to my manifest.
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="my api key, not restricted"/>
And I have added this dependency in the griddle file:
compile 'com.google.android.gms:play-services-maps:10.2.1'
Do you know why there is no map showing?

Go to :
file - new - google - Google Maps Activity and Understand the things.
Add this in your xml
tools:context="yourpackage.YourActivityName"

Google map not displaying some landmarks in android

I am new to android and working on an application which display Google map. So I followed the steps for loading google map in my application and it worked successfully but the map shown in my app is not displaying some of the landmarks, which are usually displayed in Google map app.
For more explanation, the map in my application is displaying college
library, main driveway, Children’s Park near my location but it is not
displaying the college name,or similarly it is displaying street
numbers and road names but not displaying any of the restaurants,bars
or any business landmarks.
The xml code:
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment"/>
The java code :
package com.example.mapprototype;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity {
private GoogleMap mMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
}
}
Google play service and google map api key are added in manifest file.
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data android:name="com.google.android.maps.v2.API_KEY"
android:value="my_api_key"/>
Do I need to add something else to display all the landmarks like bars,restaurant,colleges etc. that are displayed in google map default application .

Such minor details are not included in the Google Maps API.
However you can fetch nearby places using the Places API and make your own markers on the map.
Further readings:
Google Places API documentation
Usage example by Tutsplus

Android - Maps Cannot show

i wanna show google maps on my android application. show i do some basic step like this :
AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />
maps.xml
<view android:id="#+id/mv"
class="com.google.android.maps.MapView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:clickable="true"
android:apiKey="0cNoErXkpZDlKvCYr_OFj5xZD39-***********"
/>
and this is may maps class, import and onCreate method
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import android.os.Bundle;
method onCreate() on maps class
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.maps);
mapView = (MapView)findViewById(R.id.mv);
mapView.setSatellite(false);
mapView.setTraffic(false);
mapView.setBuiltInZoomControls(true);
int maxZoom = mapView.getMaxZoomLevel();
int initZoom = maxZoom-2;
mapControl = mapView.getController();
mapControl.setZoom(initZoom);
latE6 = (int) (lat*1e6);
lonE6 = (int) (lon*1e6);
gp = new GeoPoint(latE6, lonE6);
mapControl.animateTo(gp);
overlayButton = (Button)findViewById(R.id.doOverlay);
but why my map didnt show, i only see the grid whithout maps, and when i try to read logcat, i see this error with yellow color
Recycling dispatcher android_maps_conflict_avoidance.com.google.googlenav.datarequest.DataRequestDispatcher#40563470
please help me. thanks mate

Are you sure your API key is correct? When the API key doesn't match, it shows the grid instead of the map.
Running the app from Eclipse directly on the emulator / an actual phone requires a different key then when you build the .apk file first and run that on a device.

-If you have internet over proxy you will get grids .
-Use the default debug keystore for generating API key and try .