[java] Code
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- package com.example.mapandlocationdemo;
- import androidx.annotation.NonNull;
- import androidx.core.app.ActivityCompat;
- import androidx.core.content.ContextCompat;
- import androidx.fragment.app.FragmentActivity;
- import android.Manifest;
- import android.content.pm.PackageManager;
- import android.location.Location;
- import android.location.LocationListener;
- import android.location.LocationManager;
- import android.os.Build;
- import android.os.Bundle;
- import android.widget.Toast;
- import com.google.android.gms.maps.CameraUpdateFactory;
- import com.google.android.gms.maps.GoogleMap;
- import com.google.android.gms.maps.OnMapReadyCallback;
- import com.google.android.gms.maps.SupportMapFragment;
- import com.google.android.gms.maps.model.LatLng;
- import com.google.android.gms.maps.model.MarkerOptions;
- public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
- @Override
- public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
- super.onRequestPermissionsResult(requestCode, permissions, grantResults);
- if (requestCode==1){
- if (grantResults.length>0 && grantResults[0]==PackageManager.PERMISSION_GRANTED){
- if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
- locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,10,locationListener);
- }
- }
- }
- }
- private GoogleMap mMap;
- LocationManager locationManager;
- LocationListener locationListener;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_maps);
- // Obtain the SupportMapFragment and get notified when the map is ready to be used.
- SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
- .findFragmentById(R.id.map);
- mapFragment.getMapAsync(this);
- }
- /**
- * Manipulates the map once available.
- * This callback is triggered when the map is ready to be used.
- * This is where we can add markers or lines, add listeners or move the camera. In this case,
- * we just add a marker near Sydney, Australia.
- * If Google Play services is not installed on the device, the user will be prompted to install
- * it inside the SupportMapFragment. This method will only be triggered once the user has
- * installed Google Play services and returned to the app.
- */
- @Override
- public void onMapReady(GoogleMap googleMap) {
- mMap = googleMap;
- locationManager= (LocationManager) this.getSystemService(LOCATION_SERVICE);
- locationListener=new LocationListener() {
- @Override
- public void onLocationChanged(@NonNull Location location) {
- Toast.makeText(MapsActivity.this, location.toString(), Toast.LENGTH_SHORT).show();
- }
- @Override
- public void onStatusChanged(String provider, int status, Bundle extras) {
- }
- @Override
- public void onProviderEnabled(@NonNull String provider) {
- }
- @Override
- public void onProviderDisabled(@NonNull String provider) {
- }
- };
- if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED){
- ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
- }else {
- locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,0,locationListener);
- }
- // Add a marker in Sydney and move the camera
- LatLng sydney = new LatLng(-34, 151);
- mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
- mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(sydney, 20));
- }
- }
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