This example shows how to enable the My Location layer and demonstrates the My Location button to show the device's current position, represented by a blue dot, on the map.
For more information, see the documentation.
Get started
Before you can try the sample code, you must configure your development environment. For more information, see Maps SDK for Android code samples .
View the code
Kotlin
class MyLocationDemoActivity : SamplesBaseActivity (), OnMyLocationButtonClickListener , OnMyLocationClickListener , OnMapReadyCallback , OnRequestPermissionsResultCallback { /** * Flag indicating whether a requested permission has been denied after returning in * [.onRequestPermissionsResult]. */ private var permissionDenied = false private lateinit var map : GoogleMap override fun onCreate ( savedInstanceState : Bundle?) { super . onCreate ( savedInstanceState ) setContentView ( R . layout . my_location_demo ) val mapFragment = supportFragmentManager . findFragmentById ( R . id . map ) as SupportMapFragment? mapFragment ?. getMapAsync ( this ) applyInsets ( findViewById<View?>(R . id . map_container )) } override fun onMapReady ( googleMap : GoogleMap ) { map = googleMap googleMap . setOnMyLocationButtonClickListener ( this ) googleMap . setOnMyLocationClickListener ( this ) enableMyLocation () } /** * Enables the My Location layer if the fine location permission has been granted. */ @SuppressLint ( "MissingPermission" ) private fun enableMyLocation () { // 1. Check if permissions are granted, if so, enable the my location layer if ( ContextCompat . checkSelfPermission ( this , Manifest . permission . ACCESS_FINE_LOCATION ) == PackageManager . PERMISSION_GRANTED || ContextCompat . checkSelfPermission ( this , Manifest . permission . ACCESS_COARSE_LOCATION ) == PackageManager . PERMISSION_GRANTED ) { map . isMyLocationEnabled = true return } // 2. If if a permission rationale dialog should be shown if ( ActivityCompat . shouldShowRequestPermissionRationale ( this , Manifest . permission . ACCESS_FINE_LOCATION ) || ActivityCompat . shouldShowRequestPermissionRationale ( this , Manifest . permission . ACCESS_COARSE_LOCATION ) ) { PermissionUtils . RationaleDialog . newInstance ( LOCATION_PERMISSION_REQUEST_CODE , true ). show ( supportFragmentManager , "dialog" ) return } // 3. Otherwise, request permission ActivityCompat . requestPermissions ( this , arrayOf ( Manifest . permission . ACCESS_FINE_LOCATION , Manifest . permission . ACCESS_COARSE_LOCATION ), LOCATION_PERMISSION_REQUEST_CODE ) } override fun onMyLocationButtonClick (): Boolean { Toast . makeText ( this , "MyLocation button clicked" , Toast . LENGTH_SHORT ) . show () // Return false so that we don't consume the event and the default behavior still occurs // (the camera animates to the user's current position). return false } override fun onMyLocationClick ( location : Location ) { Toast . makeText ( this , "Current location:\n $ location " , Toast . LENGTH_LONG ) . show () } override fun onRequestPermissionsResult ( requestCode : Int , permissions : Array<String> , grantResults : IntArray ) { if ( requestCode != LOCATION_PERMISSION_REQUEST_CODE ) { super . onRequestPermissionsResult ( requestCode , permissions , grantResults ) return } if ( isPermissionGranted ( permissions , grantResults , Manifest . permission . ACCESS_FINE_LOCATION ) || isPermissionGranted ( permissions , grantResults , Manifest . permission . ACCESS_COARSE_LOCATION ) ) { // Enable the my location layer if the permission has been granted. enableMyLocation () } else { // Permission was denied. Display an error message // ... } } override fun onResumeFragments () { super . onResumeFragments () if ( permissionDenied ) { // Permission was not granted, display error dialog. showMissingPermissionError () permissionDenied = false } } /** * Displays a dialog with error message explaining that the location permission is missing. */ private fun showMissingPermissionError () { newInstance ( true ). show ( supportFragmentManager , "dialog" ) } companion object { /** * Request code for location permission request. * * @see .onRequestPermissionsResult */ private const val LOCATION_PERMISSION_REQUEST_CODE = 1 } }
Java
public class MyLocationDemoActivity extends SamplesBaseActivity implements OnMyLocationButtonClickListener , OnMyLocationClickListener , OnMapReadyCallback , ActivityCompat . OnRequestPermissionsResultCallback { /** * Request code for location permission request. * * @see #onRequestPermissionsResult(int, String[], int[]) */ private static final int LOCATION_PERMISSION_REQUEST_CODE = 1 ; /** * Flag indicating whether a requested permission has been denied after returning in {@link * #onRequestPermissionsResult(int, String[], int[])}. */ private boolean permissionDenied = false ; private GoogleMap map ; @Override protected void onCreate ( Bundle savedInstanceState ) { super . onCreate ( savedInstanceState ); setContentView ( com . example . common_ui . R . layout . my_location_demo ); SupportMapFragment mapFragment = ( SupportMapFragment ) getSupportFragmentManager (). findFragmentById ( com . example . common_ui . R . id . map ); mapFragment . getMapAsync ( this ); applyInsets ( findViewById ( com . example . common_ui . R . id . map_container )); } @Override public void onMapReady ( @NonNull GoogleMap googleMap ) { map = googleMap ; map . setOnMyLocationButtonClickListener ( this ); map . setOnMyLocationClickListener ( this ); enableMyLocation (); } /** * Enables the My Location layer if the fine location permission has been granted. */ @SuppressLint ( "MissingPermission" ) private void enableMyLocation () { // 1. Check if permissions are granted, if so, enable the my location layer if ( ContextCompat . checkSelfPermission ( this , Manifest . permission . ACCESS_FINE_LOCATION ) == PackageManager . PERMISSION_GRANTED || ContextCompat . checkSelfPermission ( this , permission . ACCESS_COARSE_LOCATION ) == PackageManager . PERMISSION_GRANTED ) { map . setMyLocationEnabled ( true ); return ; } // 2. Otherwise, request location permissions from the user. PermissionUtils . requestLocationPermissions ( this , LOCATION_PERMISSION_REQUEST_CODE , true ); } @Override public boolean onMyLocationButtonClick () { Toast . makeText ( this , "MyLocation button clicked" , Toast . LENGTH_SHORT ). show (); // Return false so that we don't consume the event and the default behavior still occurs // (the camera animates to the user's current position). return false ; } @Override public void onMyLocationClick ( @NonNull Location location ) { Toast . makeText ( this , "Current location:\n" + location , Toast . LENGTH_LONG ). show (); } @Override public void onRequestPermissionsResult ( int requestCode , @NonNull String [] permissions , @NonNull int [] grantResults ) { if ( requestCode != LOCATION_PERMISSION_REQUEST_CODE ) { super . onRequestPermissionsResult ( requestCode , permissions , grantResults ); return ; } if ( PermissionUtils . isPermissionGranted ( permissions , grantResults , Manifest . permission . ACCESS_FINE_LOCATION ) || PermissionUtils . isPermissionGranted ( permissions , grantResults , Manifest . permission . ACCESS_COARSE_LOCATION )) { // Enable the my location layer if the permission has been granted. enableMyLocation (); } else { // Permission was denied. Display an error message // ... } } @Override protected void onResumeFragments () { super . onResumeFragments (); if ( permissionDenied ) { // Permission was not granted, display error dialog. showMissingPermissionError (); permissionDenied = false ; } } /** * Displays a dialog with error message explaining that the location permission is missing. */ private void showMissingPermissionError () { PermissionUtils . PermissionDeniedDialog . newInstance ( true ). show ( getSupportFragmentManager (), "dialog" ); } }
Clone and run the samples
Git is required to run this sample locally. The following command clones the sample application repository.
git clone git@github.com:googlemaps-samples/android-samples.git
Import the sample project into Android Studio:
- In Android Studio, select File > New > Import Project.
-
Go to the location where you saved the repository and select the project directory for Kotlin or Java:
- Kotlin:
PATH-REPO /android-samples/ApiDemos/kotlin - Java:
PATH-REPO /android-samples/ApiDemos/java
- Kotlin:
- Select Open. Android Studio builds your project, using the Gradle build tool.
- Create a blank
secrets.propertiesfile in the same directory as your project'slocal.propertiesfile. For more information about this file, see Add your API key to the project . - Get an API key from your project with the Maps SDK for Android enabled .
-
Add the following string to
secrets.properties, replacing YOUR_API_KEYwith the value of your API key:MAPS_API_KEY= YOUR_API_KEY
- Run the app.
