如何在 Android Studio 中获取我的应用程序的当前纬度、经度和地址

Question

This is my coding below, it is giving me an output but its not my exact location. (Its giving me some location in USA). I implemented a facility to get the user's current location using the Fused Location Provider API. and also i created intent service to fetch address from latitude and longitude using Geocoder. Please help me out with this issue for my project. Here is my coding below:

This is my main Activity

public class ContactDetails extends AppCompatActivity {
    private static final int REQUEST_CODE_LOCATION_PERMISSION = 1;


    public TextView  LatLong;
    ProgressBar pb;

    private ResultReceiver resultReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_contact_details);
        resultReceiver=new AddressResultReceiver(new Handler());

        LatLong = (TextView) findViewById(R.id.latlong);
        pb = (ProgressBar) findViewById(R.id.progressBar);

 findViewById(R.id.buttonGetCurrentLocation).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (ContextCompat.checkSelfPermission(
                        getApplicationContext(), Manifest.permission.ACCESS_FINE_LOCATION
                ) != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(
                            ContactDetails.this,
                            new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                            REQUEST_CODE_LOCATION_PERMISSION
                    );
                } else {
                    getCurrentLocation();
                }
            }
        });


 @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == REQUEST_CODE_LOCATION_PERMISSION && grantResults.length > 0) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                getCurrentLocation();
            } else {
                Toast.makeText(this, "Permission Denied!", Toast.LENGTH_SHORT).show();
            }
        }
    }

    private void getCurrentLocation() {

        pb.setVisibility(View.VISIBLE);
        final LocationRequest locationRequest = new LocationRequest();
        locationRequest.setInterval(10000);
        locationRequest.setFastestInterval(3000);
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            //  return;
        }
        LocationServices.getFusedLocationProviderClient(ContactDetails.this)
                .requestLocationUpdates(locationRequest, new LocationCallback() {

                    @Override
                    public void onLocationResult(LocationResult locationResult) {
                        super.onLocationResult(locationResult);
                        LocationServices.getFusedLocationProviderClient(ContactDetails.this)
                                .removeLocationUpdates(this);
                        if (locationResult != null && locationResult.getLocations().size() > 0) {
                            int latestLocationIndex = locationResult.getLocations().size() - 1;
                            double latitude =
                                    locationResult.getLocations().get(latestLocationIndex).getLatitude();
                            double longitude =
                                    locationResult.getLocations().get(latestLocationIndex).getLongitude();
                            LatLong.setText(String.format("Latitude: %s\nLongtitude: %s", latitude, longitude));
                            Location location= new Location("providerNA");
                            location.setLatitude(latitude);
                            location.setLongitude(longitude);
                            fetchAddressFromLatLong(location);

                        } else {
                            pb.setVisibility(View.GONE);
                        }
                    }
                }, Looper.getMainLooper());


    }
    private void fetchAddressFromLatLong(Location location){
        Intent intent=new Intent(this, FetchAddressIntentService.class);
        intent.putExtra(Constants.RECEIVER, resultReceiver);
        intent.putExtra(Constants.LOCATION_DATA_EXTRA, location);
        startService(intent);
    }
    private class AddressResultReceiver extends ResultReceiver {
         AddressResultReceiver(Handler handler) {
            super(handler);
        }

        @Override
        protected void onReceiveResult(int resultCode, Bundle resultData) {
            super.onReceiveResult(resultCode, resultData);
            if(resultCode== Constants.SUCCESS_RESULT) {
                add.setText(resultData.getString(Constants.RESULT_DATA_KEY));
            }else {
                Toast.makeText(ContactDetails.this, resultData.getString(Constants.RESULT_DATA_KEY), Toast.LENGTH_SHORT).show();
            }
            pb.setVisibility(View.GONE);
        }
    } 

FetchAddressIntentService.java

public class FetchAddressIntentService extends IntentService {
    private ResultReceiver resultReceiver;
    public FetchAddressIntentService() {
        super("FetchAddressIntentService");
    }

    @Override
    protected void onHandleIntent(@Nullable Intent intent) {
        if(intent != null) {
            String errorMessage="";
            resultReceiver=intent.getParcelableExtra(Constants.RECEIVER);
            Location location= intent.getParcelableExtra(Constants.LOCATION_DATA_EXTRA);
            if(location==null){
                return;
            }
            Geocoder geocoder= new Geocoder(this, Locale.getDefault());
            List<Address> addresses=null;
            try {
                addresses=geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
            } catch (Exception exception) {
                errorMessage= exception.getMessage();
            }
            if (addresses== null || addresses.isEmpty()){
                deliverResultToReceiver(Constants.FAILURE_RESULT,errorMessage);
            }else {
                Address address=addresses.get(0);
                ArrayList<String> addressFragments= new ArrayList<>();
                for (int i = 0; i <= address.getMaxAddressLineIndex(); i++){
                    addressFragments.add(address.getAddressLine(i));
                }
                deliverResultToReceiver(
                        Constants.SUCCESS_RESULT,
                        TextUtils.join(
                                Objects.requireNonNull(System.getProperty("line.separator")),
                                addressFragments
                        )
                );
            }
        }
    }

    private void deliverResultToReceiver(int resultCode, String addressMessage) {
        Bundle bundle=new Bundle();
        bundle.putString(Constants.RESULT_DATA_KEY, addressMessage);
        resultReceiver.send(resultCode, bundle);
    }
}

Constant.java file

class Constants {
    private static final String PACKAGE_NAME="com.example.registration";
    static final String RESULT_DATA_KEY= PACKAGE_NAME + ".RESULT_DATA_KEY";
    static final String RECEIVER= PACKAGE_NAME+ ".RECEIVER";
    static final String LOCATION_DATA_EXTRA = PACKAGE_NAME+ ".LOCATION_DATA_EXTRA";
    static final int SUCCESS_RESULT=1;
    static final int FAILURE_RESULT= 0;


}

Screenshot of the app

Answer 1

If you are running your app on the simulator, then you should send a location to simulate it. The default is the location of GooglePlex, which is the one you are receiving.

Otherwise maybe your precission is not correct.

try to check this question for simulating locations.

Hope it helps.