안드로이드 내위치 찾기 소스(구글맵 이용)

 현재 안드로이드 개발공부에 심취중이다. 현재 간단한 개인프로젝트를 진행중인데 내 현재 위치를 지도상에 나타내는 소스가 필요하여 이것처것 찾다가 수시간의 시행착오끝에 다음과 같은 소스를 산출해냈다.

[MainActivity.java]

package org.techtown.myLocation;
 
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;
 
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
 
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapsInitializer;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.pedro.library.AutoPermissions;
import com.pedro.library.AutoPermissionsListener;
 
public class MainActivity extends AppCompatActivity implements AutoPermissionsListener {
 
    TextView textView;
 
    SupportMapFragment mapFragment;
    GoogleMap map;
    private Marker currentMarker = null;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        textView = findViewById(R.id.textView);
        mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
        mapFragment.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(GoogleMap googleMap) {
                map = googleMap;
                startLocationService();
            }
        });
 
        try {
            MapsInitializer.initialize(this);
        } catch (Exception e) {
            e.printStackTrace();
        }
 
        AutoPermissions.Companion.loadAllPermissions(this, 100);
 
    }
 
    private void setDefaultLocation() {
        //디폴트 위치, Seoul
        LatLng DEFAULT_LOCATION = new LatLng(37.56, 126.97);
        String markerTitle = "위치정보 가져올 수 없음";
        String markerSnippet = "위치 퍼미션과 GPS 활성 요부 확인하세요";
 
 
        if (currentMarker != null) currentMarker.remove();
 
        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(DEFAULT_LOCATION);
        markerOptions.title(markerTitle);
        markerOptions.snippet(markerSnippet);
        markerOptions.draggable(true);
        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
        currentMarker = map.addMarker(markerOptions);
 
        CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(DEFAULT_LOCATION, 15);
        map.moveCamera(cameraUpdate);
    }
 
    private void startLocationService() {
        LocationManager manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
 
        try {
            int chk1 = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION);
            int chk2 = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION);
 
            Location location = null;
            if (chk1 == PackageManager.PERMISSION_GRANTED && chk2 == PackageManager.PERMISSION_GRANTED) {
                location = manager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
            } else {
                return;
            }
 
            if (location != null) {
                double latitude = location.getLatitude();
                double longitude = location.getLongitude();
                String msg = "최근 위치 ->  Latitue : " + latitude + "\nLongitude : " + longitude;
                showCurrentLocation(latitude, longitude);
                textView.setText(msg);
            }
 
            GPSListener gpsListener = new GPSListener();
            long minTime = 10000;
            float minDistance = 0;
 
            manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, minTime, minDistance, gpsListener);
 
 
        } catch (
                Exception e) {
            e.printStackTrace();
        }
    }
 
    class GPSListener implements LocationListener {
 
        @Override
        public void onLocationChanged(Location location) {
            Double latitude = location.getLatitude();
            Double longitude = location.getLongitude();
 
            String message = "내 위치 -> Latitude : " + latitude + "\nLongitude:" + longitude;
            Log.d("Map", message);
 
            showCurrentLocation(latitude, longitude);
        }
 
        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {
        }
 
        @Override
        public void onProviderEnabled(String provider) {
        }
 
        @Override
        public void onProviderDisabled(String provider) {
        }
    }
 
    private void showCurrentLocation(Double latitude, Double longitude) {
        LatLng curPoint = new LatLng(latitude, longitude);
 
        map.animateCamera(CameraUpdateFactory.newLatLngZoom(curPoint, 15));
 
        //디폴트 위치, Seoul
        Toast.makeText(getApplicationContext(), "실행", Toast.LENGTH_LONG).show();
        String markerTitle = "내위치";
        String markerSnippet = "위치정보가 확인되었습니다.";
 
        if (currentMarker != null) currentMarker.remove();
 
        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(curPoint);
        markerOptions.title(markerTitle);
        markerOptions.snippet(markerSnippet);
        markerOptions.draggable(true);
        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
        currentMarker = map.addMarker(markerOptions);
 
        CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(curPoint, 15);
        map.moveCamera(cameraUpdate);
    }
 
    @Override
    public void onDenied(int i, String[] strings) {
    }
 
    @Override
    public void onGranted(int i, String[] strings) {
        Toast.makeText(this, "permissions granted : " + strings.length, Toast.LENGTH_LONG).show();
    }
 
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        AutoPermissions.Companion.parsePermissions(this, requestCode, permissions, this);
    }
}
 

위의 ActivityMain.xml에서 예제소스를 그대로 써도 내위치를 나타내지 않고 있었는데 그 이유는 CameraUpdate나 Marking해주는 소스가 빠져있었기 때문이었다. 그래서 해당 소스를 추가해 주었다. 

[android_main.xml]

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">
 
    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView" />
 
    <fragment
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        class="com.google.android.gms.maps.SupportMapFragment"/>
 
</LinearLayout>

[manifest.xml]

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.techtown.myLocation">
 
    <permission
        android:name="org.techtown.location.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />
    <uses-permission android:name="org.techtown.location.permission.MAPS_RECEIVE" />
 
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
 
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true"/>
 
    <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">
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="[개인 API KEY]"/>
 
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
 
</manifest>

담배피러 아파트를 나섰을때 정확히 내 위치정보가 갱신되는 것을 확인하였을 때의 쾌감이란 이루 말할 수 없다.

요즘에서야 학생시절 느꼈던 개발의 즐거움을 다시나마 느끼고 있는 중이다. 

학교를 졸업하고나서 회사에 다니면서 여러가지 회의감이 들었는데 그 이유는 인생의 목적을 돈에 두고 있었기 떄문이라고 생각한다.

그러던 차에 군시절 쓴 수양록에 쓴 내 꿈 최고의 프로그래머 라는 것을 보고 퇴사를 하고 이렇게 돈도 못 버는 백수가 되어있지만

꿈을향해 나아가고 있다는 확신이 들기에 하루하루가 어느때 보다 즐겁다.