구글맵에 현재 위치 표시하기 (Fragment )

구글 제공 구글맵 샘플코드는 https://github.com/googlemaps/android-samples/tree/master 에서 다운로드 받아서 필요한 것을 구현하면 된다.

구글 맵에 현재 위치를 표시하는 걸 Activity 위헤서 동작하는 걸 구현 테스트했다면, 이제 Fragment 상에서 동작되도록 하는 법을 기술한다.

<!-- Activity에서는 fragment로 구현해야 되지만 Fragment로 구현하기위해서는 MapView를 주로 사용-->
<com.google.android.gms.maps.MapView
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:name="com.google.android.gms.maps.MapFragment" />

Fragment 생애 주기를 고려해서 처리하지 않으면 배터리 소모나 메모리 누수가 발생할 수 있으니 이런 것까지 고려해서 처리한다.

소스코드를 비교해서 보면 알겠지만 이전 게시글(https://link2me.tistory.com/1703) 코드를 거의 붙여넣기 했는데 들어갈 위치가 좀 다른 것이 있다는 점만 고려하면 된다.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout 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">     <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"         android:id="@+id/fragment_container"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:layout_above="@+id/tabmenuLayout" />     <LinearLayout         android:id="@+id/tabmenuLayout"         android:layout_width="match_parent"         android:layout_height="50dp"         android:orientation="horizontal"         android:layout_alignParentBottom="true" >         <Button             android:id="@+id/btn_tab1"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_weight="1"             android:text="구글맵"/>         <Button             android:id="@+id/btn_tab2"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_weight="1"             android:text="내 위치"/>         <Button             android:id="@+id/btn_tab3"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_weight="1"             android:text="Tab 3"/>     </LinearLayout> </RelativeLayout>

fragment_02.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="#000000">     <com.google.android.gms.maps.MapView         android:id="@+id/map"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:name="com.google.android.gms.maps.MapFragment"         /> </RelativeLayout>

MainActivity.java

import android.app.Fragment; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.content.Context; import android.os.Build; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.Toast; import androidx.appcompat.app.AppCompatActivity; import com.gun0912.tedpermission.PermissionListener; import com.gun0912.tedpermission.TedPermission; import java.util.ArrayList; public class MainActivity extends AppCompatActivity implements View.OnClickListener {     Context context;     private Button tab1, tab2, tab3;     private Fragment fragment = null;     PermissionListener permissionlistener = new PermissionListener() {         @Override         public void onPermissionGranted() {             initView();         }         @Override         public void onPermissionDenied(ArrayList<String> deniedPermissions) {             Toast.makeText(context, "권한 허용을 하지 않으면 서비스를 이용할 수 없습니다.", Toast.LENGTH_SHORT).show();         }     };     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         context = this.getBaseContext();         checkPermissions();     }     private void checkPermissions() {         if (Build.VERSION.SDK_INT >= 23) { // 마시멜로(안드로이드 6.0) 이상 권한 체크             TedPermission.with(context)                     .setPermissionListener(permissionlistener)                     .setRationaleMessage("앱을 이용하기 위해서는 접근 권한이 필요합니다")                     .setDeniedMessage("앱에서 요구하는 권한설정이 필요합니다...\n [설정] > [권한] 에서 사용으로 활성화해주세요.")                     .setPermissions(new String[]{                             android.Manifest.permission.ACCESS_FINE_LOCATION,                             android.Manifest.permission.ACCESS_COARSE_LOCATION                             //android.Manifest.permission.READ_EXTERNAL_STORAGE,                             //android.Manifest.permission.WRITE_EXTERNAL_STORAGE // 기기, 사진, 미디어, 파일 엑세스 권한                     })                     .check();         } else {             initView();         }     }     private void initView() {         tab1 = findViewById(R.id.btn_tab1);         tab2 = findViewById(R.id.btn_tab2);         tab3 = findViewById(R.id.btn_tab3);         tab1.setOnClickListener(this);         tab2.setOnClickListener(this);         tab3.setOnClickListener(this);         if(findViewById(R.id.fragment_container) != null){             Fragment01 fragment01 = new Fragment01();             fragment01.setArguments(getIntent().getExtras());             getFragmentManager().beginTransaction().add(R.id.fragment_container, fragment01).commitAllowingStateLoss();         }     }     @Override     public void onClick(View v) {         switch (v.getId()){             case R.id.btn_tab1:                 fragment = new Fragment01();                 selectFragment(fragment);                 break;             case R.id.btn_tab2:                 fragment = new Fragment02();                 selectFragment(fragment);                 break;             case R.id.btn_tab3:                 fragment = new Fragment03();                 selectFragment(fragment);                 break;         }     }     private void selectFragment(Fragment fragment) {         // 액티비티 내의 프래그먼트를 관리하려면 FragmentManager를 사용해야 함.         FragmentManager fragmentManager = getFragmentManager();         FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();         fragmentTransaction.replace(R.id.fragment_container,fragment);         // FragmentTransaction을 변경하고 나면, 반드시 commit()을 호출해야 변경 내용이 적용됨         fragmentTransaction.commit();     } }

Fragment2.java

package com.link2me.android.googlemap; import android.app.Activity; import android.app.Fragment; import android.content.Context; import android.content.pm.PackageManager; import android.location.Address; import android.location.Geocoder; import android.location.Location; import android.location.LocationManager; import android.os.Bundle; import android.os.Looper; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Toast; import androidx.annotation.NonNull; import androidx.annotation.Nullable; import androidx.core.app.ActivityCompat; import androidx.core.content.ContextCompat; import androidx.fragment.app.FragmentActivity; 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; import com.google.android.gms.location.LocationSettingsRequest; 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.MapView; import com.google.android.gms.maps.MapsInitializer; import com.google.android.gms.maps.OnMapReadyCallback; import com.google.android.gms.maps.model.BitmapDescriptorFactory; import com.google.android.gms.maps.model.CameraPosition; 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 java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.List; import java.util.Locale; public class Fragment02 extends Fragment implements OnMapReadyCallback {     private FragmentActivity mContext;     private static final String TAG = Fragment02.class.getSimpleName();     private GoogleMap mMap;     private MapView mapView = null;     private Marker currentMarker = null;     // The entry point to the Fused Location Provider.     private FusedLocationProviderClient mFusedLocationProviderClient; // Deprecated된 FusedLocationApi를 대체     private LocationRequest locationRequest;     private Location mCurrentLocatiion;     private final LatLng mDefaultLocation = new LatLng(37.56, 126.97);     private static final int DEFAULT_ZOOM = 15;     private static final int PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1;     private boolean mLocationPermissionGranted;     private static final int GPS_ENABLE_REQUEST_CODE = 2001;     private static final int UPDATE_INTERVAL_MS = 1000 * 60 * 1;  // 1분 단위 시간 갱신     private static final int FASTEST_UPDATE_INTERVAL_MS = 1000 * 30 ; // 30초 단위로 화면 갱신     private static final String KEY_CAMERA_POSITION = "camera_position";     private static final String KEY_LOCATION = "location";     public Fragment02() {     }     @Override     public void onAttach(Activity activity) { // Fragment 가 Activity에 attach 될 때 호출된다.         mContext =(FragmentActivity) activity;         super.onAttach(activity);     }     @Override     public void onCreate(@Nullable Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         // 초기화 해야 하는 리소스들을 여기서 초기화 해준다.     }     @Nullable     @Override     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {         // Layout 을 inflate 하는 곳이다.         if (savedInstanceState != null) {             mCurrentLocatiion = savedInstanceState.getParcelable(KEY_LOCATION);             CameraPosition mCameraPosition = savedInstanceState.getParcelable(KEY_CAMERA_POSITION);         }         View layout =  inflater.inflate(R.layout.fragment_02,container,false);         mapView = (MapView)layout.findViewById(R.id.map);         if(mapView != null) {             mapView.onCreate(savedInstanceState);         }         mapView.getMapAsync(this);         return layout;     }     @Override     public void onActivityCreated(@Nullable Bundle savedInstanceState) {         // Fragement에서의 OnCreateView를 마치고, Activity에서 onCreate()가 호출되고 나서 호출되는 메소드이다.         // Activity와 Fragment의 뷰가 모두 생성된 상태로, View를 변경하는 작업이 가능한 단계다.         super.onActivityCreated(savedInstanceState);         //액티비티가 처음 생성될 때 실행되는 함수         MapsInitializer.initialize(mContext);         locationRequest = new LocationRequest()                 .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY) // 정확도를 최우선적으로 고려                 .setInterval(UPDATE_INTERVAL_MS) // 위치가 Update 되는 주기                 .setFastestInterval(FASTEST_UPDATE_INTERVAL_MS); // 위치 획득후 업데이트되는 주기         LocationSettingsRequest.Builder builder =                 new LocationSettingsRequest.Builder();         builder.addLocationRequest(locationRequest);         // FusedLocationProviderClient 객체 생성         mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(mContext);     }     @Override     public void onSaveInstanceState(Bundle outState) {         super.onSaveInstanceState(outState);         mapView.onSaveInstanceState(outState);     }     @Override     public void onMapReady(GoogleMap googleMap) {         mMap = googleMap;         setDefaultLocation(); // GPS를 찾지 못하는 장소에 있을 경우 지도의 초기 위치가 필요함.         getLocationPermission();         updateLocationUI();         getDeviceLocation();     }     private void updateLocationUI() {         if (mMap == null) {             return;         }         try {             if (mLocationPermissionGranted) {                 mMap.setMyLocationEnabled(true);                 mMap.getUiSettings().setMyLocationButtonEnabled(true);             } else {                 mMap.setMyLocationEnabled(false);                 mMap.getUiSettings().setMyLocationButtonEnabled(false);                 mCurrentLocatiion = null;                 getLocationPermission();             }         } catch (SecurityException e)  {             Log.e("Exception: %s", e.getMessage());         }     }     private void setDefaultLocation() {         if (currentMarker != null) currentMarker.remove();         MarkerOptions markerOptions = new MarkerOptions();         markerOptions.position(mDefaultLocation);         markerOptions.title("위치정보 가져올 수 없음");         markerOptions.snippet("위치 퍼미션과 GPS 활성 여부 확인하세요");         markerOptions.draggable(true);         markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));         currentMarker = mMap.addMarker(markerOptions);         CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(mDefaultLocation, 15);         mMap.moveCamera(cameraUpdate);     }     String getCurrentAddress(LatLng latlng) {         // 위치 정보와 지역으로부터 주소 문자열을 구한다.         List<Address> addressList = null ;         Geocoder geocoder = new Geocoder( mContext, Locale.getDefault());         // 지오코더를 이용하여 주소 리스트를 구한다.         try {             addressList = geocoder.getFromLocation(latlng.latitude,latlng.longitude,1);         } catch (IOException e) {             Toast. makeText( mContext, "위치로부터 주소를 인식할 수 없습니다. 네트워크가 연결되어 있는지 확인해 주세요.", Toast.LENGTH_SHORT ).show();             e.printStackTrace();             return "주소 인식 불가" ;         }         if (addressList.size() < 1) { // 주소 리스트가 비어있는지 비어 있으면             return "해당 위치에 주소 없음" ;         }         // 주소를 담는 문자열을 생성하고 리턴         Address address = addressList.get(0);         StringBuilder addressStringBuilder = new StringBuilder();         for (int i = 0; i <= address.getMaxAddressLineIndex(); i++) {             addressStringBuilder.append(address.getAddressLine(i));             if (i < address.getMaxAddressLineIndex())                 addressStringBuilder.append("\n");         }         return addressStringBuilder.toString();     }     LocationCallback locationCallback = new LocationCallback() {         @Override         public void onLocationResult(LocationResult locationResult) {             super.onLocationResult(locationResult);             List<Location> locationList = locationResult.getLocations();             if (locationList.size() > 0) {                 Location location = locationList.get(locationList.size() - 1);                 LatLng currentPosition                         = new LatLng(location.getLatitude(), location.getLongitude());                 String markerTitle = getCurrentAddress(currentPosition);                 String markerSnippet = "위도:" + String.valueOf(location.getLatitude())                         + " 경도:" + String.valueOf(location.getLongitude());                 Log.d(TAG, "Time :" + CurrentTime() + " onLocationResult : " + markerSnippet);                 //현재 위치에 마커 생성하고 이동                 setCurrentLocation(location, markerTitle, markerSnippet);                 mCurrentLocatiion = location;             }         }     };     private String CurrentTime(){         Date today = new Date();         SimpleDateFormat date = new SimpleDateFormat("yyyy/MM/dd");         SimpleDateFormat time = new SimpleDateFormat("hh:mm:ss a");         return time.format(today);     }     public void setCurrentLocation(Location location, String markerTitle, String markerSnippet) {         if (currentMarker != null) currentMarker.remove();         LatLng currentLatLng = new LatLng(location.getLatitude(), location.getLongitude());         MarkerOptions markerOptions = new MarkerOptions();         markerOptions.position(currentLatLng);         markerOptions.title(markerTitle);         markerOptions.snippet(markerSnippet);         markerOptions.draggable(true);         currentMarker = mMap.addMarker(markerOptions);         CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLng(currentLatLng);         mMap.moveCamera(cameraUpdate);     }     private void getDeviceLocation() {         try {             if (mLocationPermissionGranted) {                 mFusedLocationProviderClient.requestLocationUpdates(locationRequest, locationCallback, Looper.myLooper());             }         } catch (SecurityException e)  {             Log.e("Exception: %s", e.getMessage());         }     }     private void getLocationPermission() {         if (ContextCompat.checkSelfPermission(mContext,                 android.Manifest.permission.ACCESS_FINE_LOCATION)                 == PackageManager.PERMISSION_GRANTED) {             mLocationPermissionGranted = true;         } else {             ActivityCompat.requestPermissions(mContext,                     new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},                     PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);         }     }     @Override     public void onRequestPermissionsResult(int requestCode,                                            @NonNull String permissions[],                                            @NonNull int[] grantResults) {         mLocationPermissionGranted = false;         switch (requestCode) {             case PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION: {                 if (grantResults.length > 0                         && grantResults[0] == PackageManager.PERMISSION_GRANTED) {                     mLocationPermissionGranted = true;                 }             }         }         updateLocationUI();     }     public boolean checkLocationServicesStatus() {         LocationManager locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);         return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) ||                 locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);     }     @Override     public void onStart() { // 유저에게 Fragment가 보이도록 해준다.         super.onStart();         mapView.onStart();         Log.d(TAG, "onStart ");     }     @Override     public void onStop() {         super.onStop();         mapView.onStop();         if (mFusedLocationProviderClient != null) {             Log.d(TAG, "onStop : removeLocationUpdates");             mFusedLocationProviderClient.removeLocationUpdates(locationCallback);         }     }     @Override     public void onResume() { // 유저에게 Fragment가 보여지고, 유저와 상호작용이 가능하게 되는 부분         super.onResume();         mapView.onResume();         if (mLocationPermissionGranted) {             Log.d(TAG, "onResume : requestLocationUpdates");             mFusedLocationProviderClient.requestLocationUpdates(locationRequest, locationCallback, null);             if (mMap!=null)                 mMap.setMyLocationEnabled(true);         }     }     @Override     public void onPause() {         super.onPause();         mapView.onPause();     }     @Override     public void onLowMemory() {         super.onLowMemory();         mapView.onLowMemory();     }     @Override     public void onDestroyView() { // 프래그먼트와 관련된 View 가 제거되는 단계         super.onDestroyView();         if (mFusedLocationProviderClient != null) {             Log.d(TAG, "onDestroyView : removeLocationUpdates");             mFusedLocationProviderClient.removeLocationUpdates(locationCallback);         }     }     @Override     public void onDestroy() {         // Destroy 할 때는, 반대로 OnDestroyView에서 View를 제거하고, OnDestroy()를 호출한다.         super.onDestroy();         mapView.onDestroy();     } }

테스트한 소스 코드는 다른 기능을 좀 더 구현 테스트해보고 올려둘 생각이다.