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Android에서 사용자의 현재 위치를 얻는 가장 간단한 방법

이 예는 가장 간단한 방법으로 Android에서 사용자의 현재 위치를 얻는 방법을 보여줍니다.

1단계 − Android Studio에서 새 프로젝트를 생성하고 파일 ⇒ 새 프로젝트로 이동하여 필요한 모든 세부 정보를 입력하여 새 프로젝트를 생성합니다.

2단계 − res/layout/activity_main.xml에 다음 코드를 추가합니다.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"
   xmlns:tools="https://schemas.android.com/tools"
   android:orientation="vertical"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
<TextView
   android:layout_marginTop="20dp"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="Get Current Location and City Name"
   android:textAlignment="center"
   android:layout_centerHorizontal="true"
   android:textSize="20sp" />
<TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/textView"
   android:layout_centerInParent="true"
   android:textSize="16sp"
   android:textStyle="bold"/>
</RelativeLayout>

3단계 − Gradle에 다음 종속성 추가

implementation 'com.google.android.gms:play-services-location:17.0.0'

4단계 − src/MainActivity.java

에 다음 코드 추가 
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Geocoder;
import android.location.Location;
import android.os.Bundle;
import android.os.Handler;
import android.os.ResultReceiver;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationCallback;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationResult;
import com.google.android.gms.location.LocationServices;
public class MainActivity extends AppCompatActivity {
   private FusedLocationProviderClient fusedLocationClient;
   private static final int LOCATION_PERMISSION_REQUEST_CODE = 2;
   private LocationAddressResultReceiver addressResultReceiver;
   private TextView currentAddTv;
   private Location currentLocation;
   private LocationCallback locationCallback;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      addressResultReceiver = new LocationAddressResultReceiver(new Handler());
      currentAddTv = findViewById(R.id.textView);
      fusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
      locationCallback = new LocationCallback() {
         @Override
         public void onLocationResult(LocationResult locationResult) {
            currentLocation = locationResult.getLocations().get(0);
            getAddress();
         }
      };
      startLocationUpdates();
   }
   @SuppressWarnings("MissingPermission")
   private void startLocationUpdates() {
      if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) !=
      PackageManager.PERMISSION_GRANTED) {
         ActivityCompat.requestPermissions(this, new
         String[]{Manifest.permission.ACCESS_FINE_LOCATION},
         LOCATION_PERMISSION_REQUEST_CODE);
      }
      else {
         LocationRequest locationRequest = new LocationRequest();
         locationRequest.setInterval(2000);
         locationRequest.setFastestInterval(1000);
         locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
         fusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
      }
   }
   @SuppressWarnings("MissingPermission")
   private void getAddress() {
      if (!Geocoder.isPresent()) {
         Toast.makeText(MainActivity.this, "Can't find current address, ",
         Toast.LENGTH_SHORT).show();
         return;
      }
      Intent intent = new Intent(this, GetAddressIntentService.class);
      intent.putExtra("add_receiver", addressResultReceiver);
      intent.putExtra("add_location", currentLocation);
      startService(intent);
   }
   @Override
   public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull
int[] grantResults) {
   if (requestCode == LOCATION_PERMISSION_REQUEST_CODE) {
      if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
         startLocationUpdates();
      }
       else {
         Toast.makeText(this, "Location permission not granted, " + "restart the app if you want the
         feature", Toast.LENGTH_SHORT).show();
      }
   }
}
private class LocationAddressResultReceiver extends ResultReceiver {
   LocationAddressResultReceiver(Handler handler) {
      super(handler);
   }
   @Override
   protected void onReceiveResult(int resultCode, Bundle resultData) {
      if (resultCode == 0) {
         Log.d("Address", "Location null retrying");
         getAddress();
      }
      if (resultCode == 1) {
         Toast.makeText(MainActivity.this, "Address not found, ", Toast.LENGTH_SHORT).show();
      }
      String currentAdd = resultData.getString("address_result");
         showResults(currentAdd);
      }
   }
   private void showResults(String currentAdd) {
      currentAddTv.setText(currentAdd);
   }
   @Override
   protected void onResume() {
      super.onResume();
      startLocationUpdates();
   }
   @Override
   protected void onPause() {
      super.onPause();
      fusedLocationClient.removeLocationUpdates(locationCallback);
   }
}

5단계 − 새 Java 클래스 GetaddressIntentService.java를 만들고 다음 코드를 추가합니다.

package app.com.sample;
import android.app.IntentService;
import android.content.Intent;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.os.Bundle;
import android.os.ResultReceiver;
import android.util.Log;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import androidx.annotation.Nullable;
public class GetAddressIntentService extends IntentService {
   private static final String IDENTIFIER = "GetAddressIntentService";
   private ResultReceiver addressResultReceiver;
   public GetAddressIntentService() {
      super(IDENTIFIER);
   }
   @Override
   protected void onHandleIntent(@Nullable Intent intent) {
      String msg;
      addressResultReceiver = Objects.requireNonNull(intent).getParcelableExtra("add_receiver");
      if (addressResultReceiver == null) {
         Log.e("GetAddressIntentService", "No receiver, not processing the request further");
         return;
      }
      Location location = intent.getParcelableExtra("add_location");
      if (location == null) {
         msg = "No location, can't go further without location";
         sendResultsToReceiver(0, msg);
      return;
   }
   Geocoder geocoder = new Geocoder(this, Locale.getDefault());
   List<Address> addresses = null;
   try {
      addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
   }
   catch (Exception ioException) {
      Log.e("", "Error in getting address for the location");
   }
   if (addresses == null || addresses.size() == 0) {
      msg = "No address found for the location";
      sendResultsToReceiver(1, msg);
   }
   else {
      Address address = addresses.get(0);
      String addressDetails = address.getFeatureName() + "\n" + address.getThoroughfare() + "\n" +
      "Locality: " + address.getLocality() + "\n" + "County: " + address.getSubAdminArea() + "\n" +
      "State: " + address.getAdminArea() + "\n" + "Country: " + address.getCountryName() + "\n" +
      "Postal Code: " + address.getPostalCode() + "\n";
      sendResultsToReceiver(2, addressDetails);
   }
}
private void sendResultsToReceiver(int resultCode, String message) {
   Bundle bundle = new Bundle();
   bundle.putString("address_result", message);
   addressResultReceiver.send(resultCode, bundle);
   }
}

6단계 − androidManifest.xml에 다음 코드 추가

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="https://schemas.android.com/apk/res/android"
   package="app.com.sample">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   <service android:name=".GetAddressIntentService" />
</application>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
</manifest>

응용 프로그램을 실행해 보겠습니다. 실제 Android 모바일 장치를 컴퓨터에 연결했다고 가정합니다. Android 스튜디오에서 앱을 실행하려면 프로젝트의 활동 파일 중 하나를 열고 실행을 클릭합니다. 도구 모음에서 Android에서 사용자의 현재 위치를 얻는 가장 간단한 방법 아이콘. 모바일 장치를 옵션으로 선택한 다음 기본 화면을 표시할 모바일 장치를 확인하십시오 -

Android에서 사용자의 현재 위치를 얻는 가장 간단한 방법