구글맵v2 현재위치 지정에 대해 질문드립니다.

Question

액티비티를 시작할 시에 구글맵에 현재 저의 위치로 마커를 찍도록 해보려고 합니다

package com.example.gmap;

import android.location.Location;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;

import com.google.android.gms.maps.GoogleMap;
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 MapActivity extends FragmentActivity {
    
    private GoogleMap gMap;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.map_activity);
        // TODO Auto-generated method stub
        init();
    }
    
    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        init();
    }

    void init () {
        if (gMap==null) {
            gMap = ((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
            if(gMap!=null) {
                addMarker();
            }
        }
    }
    
    void addMarker () {
        Location cLoc = gMap.getMyLocation();
        gMap.addMarker(new MarkerOptions().position(new LatLng(cLoc.getLatitude(),cLoc.getLongitude())).title("test"));
    }
}

10-02 11:27:42.031: E/AndroidRuntime(20030): FATAL EXCEPTION: main
10-02 11:27:42.031: E/AndroidRuntime(20030): Process: com.example.gmap, PID: 20030
10-02 11:27:42.031: E/AndroidRuntime(20030): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.gmap/com.example.gmap.MapActivity}: java.lang.IllegalStateException: MyLocation layer not enabled
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3119)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3218)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.app.ActivityThread.access$1000(ActivityThread.java:198)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1676)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.os.Handler.dispatchMessage(Handler.java:102)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.os.Looper.loop(Looper.java:145)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.app.ActivityThread.main(ActivityThread.java:6837)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at java.lang.reflect.Method.invoke(Native Method)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at java.lang.reflect.Method.invoke(Method.java:372)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
10-02 11:27:42.031: E/AndroidRuntime(20030): Caused by: java.lang.IllegalStateException: MyLocation layer not enabled
10-02 11:27:42.031: E/AndroidRuntime(20030):     at com.google.a.a.ab.b(Unknown Source)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at com.google.maps.api.android.lib6.d.et.j(Unknown Source)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at com.google.android.gms.maps.internal.j.onTransact(SourceFile:281)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.os.Binder.transact(Binder.java:395)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at com.google.android.gms.maps.internal.IGoogleMapDelegate$zza$zza.getMyLocation(Unknown Source)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at com.google.android.gms.maps.GoogleMap.getMyLocation(Unknown Source)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at com.example.gmap.MapActivity.addMarker(MapActivity.java:42)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at com.example.gmap.MapActivity.init(MapActivity.java:36)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at com.example.gmap.MapActivity.onCreate(MapActivity.java:22)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.app.Activity.performCreate(Activity.java:6500)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1120)
10-02 11:27:42.031: E/AndroidRuntime(20030):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3072)
10-02 11:27:42.031: E/AndroidRuntime(20030):     ... 10 more

위 소스에서 Location 을 이용하지않고 제가 직접 position에 (0,0)과 같이 특정값을 주어 실행하였을땐 런타임 오류없이 마커가 찍혀 나오는데요, Location에 getMyLocation 함수를 이용할 시엔 런타임 에러가 발생합니다...

초보개발자에게 도움부탁드립니다ㅜㅜ

Answer 1

웁스...답변 달고 버튼 눌렀더니 DB접속 에러가 나면서 답변이 사라졌네요. ㅠ.ㅠ

대충 답변할께요.

getMyLocation()은 deprecated되었습니다. (https://developers.google.com/android/reference/com/google/android/gms/maps/GoogleMap)

로그만으로 추정해보면, 현재 자기 위치를 얻어올 수 없는 상황인 것 같네요

setMyLocationEnabled(true)를 먼저 호출하고 자기 위치를 얻어와보시면 되지 않을까 싶습니다.

 

deprecated된 메소드는 가능하면 호출하지 않는 게 좋습니다. 물론 연습용이라면 상관없습니다만, 실제 동작해야 하는 서비스이라면 언제 해당 메소드에 대한 지원이 끊길지 모르니까요.

Comments

답변감사합니다
답변주신대로 setMyLocation(true) 호출후에 해보았지만, cLoc에 null값이 저장되는건 변하지 않네요...
10-02 13:51:53.971: D/1(6734): 1
10-02 13:51:53.971: D/AndroidRuntime(6734): Shutting down VM
10-02 13:51:53.971: E/AndroidRuntime(6734): FATAL EXCEPTION: main
10-02 13:51:53.971: E/AndroidRuntime(6734): Process: com.example.gmap, PID: 6734
10-02 13:51:53.971: E/AndroidRuntime(6734): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.gmap/com.example.gmap.MapActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'double android.location.Location.getLatitude()' on a null object reference
10-02 13:51:53.971: E/AndroidRuntime(6734):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3119)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3218)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at android.app.ActivityThread.access$1000(ActivityThread.java:198)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1676)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at android.os.Handler.dispatchMessage(Handler.java:102)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at android.os.Looper.loop(Looper.java:145)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at android.app.ActivityThread.main(ActivityThread.java:6837)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at java.lang.reflect.Method.invoke(Native Method)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at java.lang.reflect.Method.invoke(Method.java:372)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
10-02 13:51:53.971: E/AndroidRuntime(6734): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'double android.location.Location.getLatitude()' on a null object reference
10-02 13:51:53.971: E/AndroidRuntime(6734):     at com.example.gmap.MapActivity.addMarker(MapActivity.java:46)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at com.example.gmap.MapActivity.init(MapActivity.java:38)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at com.example.gmap.MapActivity.onCreate(MapActivity.java:23)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at android.app.Activity.performCreate(Activity.java:6500)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1120)
10-02 13:51:53.971: E/AndroidRuntime(6734):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3072)
10-02 13:51:53.971: E/AndroidRuntime(6734):     ... 10 more

구글맵에서 현재 위치의 데이터 값 자체를 받는건 불가능한건가요?

---

해당 메소드 자체가 deprecated된거니까 그게 동작하지 않는다면, 권장되는 방식으로 사용해야죠
현재 구글에서 권장하는 방식은 구글맵이 아니라 플레이서비스를 통해 위치를 얻어오는 방식입니다.
https://developer.android.com/training/location/index.html