Android Google Maps in Fragment

Question

Sto sviluppando un'applicazione con un menu in alto con alcuni pulsanti all'interno di quel menu. Sto cercando di aggiungere google maps a uno dei pulsanti, ma non ho molto successo. Stavo seguendo this tutorial ma invece di implementare google maps direttamente in MainActivity li ho aggiunti in un frammento che viene avviato quando si preme il pulsante. Tutto ha funzionato bene. Quando premo il pulsante, le mappe si caricano e funzionano come dovrebbero. Quando si preme il pulsante Home per tornare alla MainActivity funziona perfettamente, ma quando voglio caricare mappe di nuovo mi dà debugging error: Class File Editor: Source not found

Questo è il codice di GoogleMaps frammento:

public class GoogleMaps extends Fragment{ 

private GoogleMap googleMap; 
double latitude = 46.514249; 
double longitude = 15.080183; 

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     final View myFragmentView = inflater.inflate(R.layout.maps_layout, container, false); 

     try { 
      // Loading map 
      initilizeMap(); 

     } catch (Exception e) { 
      Log.e("ERROR", "ERROR IN CODE: " + e.toString()); 
      e.printStackTrace(); 
     } 

     return myFragmentView; 
} 

private void initilizeMap() { 
     if (googleMap == null) { 
      googleMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap(); 
      googleMap.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude))); 
      CameraPosition cameraPosition = new CameraPosition.Builder().target(
        new LatLng(latitude, longitude)).zoom(12).build(); 
      googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition)); 
      // check if map is created successfully or not 
      if (googleMap == null) { 
       Toast.makeText(getActivity(), 
         "Sorry! unable to create maps", Toast.LENGTH_SHORT) 
         .show(); 
      } 
     } 
} 
} 

Qualsiasi aiuto sarà apprezzato .

MODIFICA: Se non ero abbastanza specifico. Funziona quando carico fragment una volta (per la prima volta) ma non funziona quando provo a caricarlo di nuovo (seconda volta).

EDIT v2: In realtà ho trovato la soluzione da solo. Tutto quello che dovevo fare era aggiungere OnDestroyView metodo:

public void onDestroyView() 
{ 
     super.onDestroyView(); 
     Fragment fragment = (getFragmentManager().findFragmentById(R.id.map)); 
     FragmentTransaction ft = getActivity().getFragmentManager().beginTransaction(); 
     ft.remove(fragment); 
     ft.commit(); 
} 

Grazie comunque.

Answer 1

Dai un'occhiata alla mia implementazione che funziona bene e anche dosare alcuni controlli sul dispositivo prima di provare a diplay la mappa come se i servizi di Google Play sono installati. Forse ti aiuterà. Sto usando una FragmentActivity semplice e gonfio un layout contenente un SupportedMapFragment.

Ecco il codice:

public class LocationActivity extends FragmentActivity { 

    private GoogleMap map; 
    private long rec_id; 
    private String address; 
    private Marker selectedLoc; 
    private boolean isSessionClosed; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     BugSenseHandler.initAndStartSession(this, Constants.BugSenseKEY); 
     setContentView(R.layout.preview_location); 
     RelativeLayout cancel_btn = (RelativeLayout) findViewById(R.id.cancel_btn); 
     LinearLayout save_location_btn = (LinearLayout) findViewById(R.id.delete_btn); 

     save_location_btn.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 

       if (address != null) { 
        ReceiptDataSource r = new ReceiptDataSource(); 
        r.updateReceiptLocation(rec_id, address); 
        Intent returnIntent = new Intent(getBaseContext(), EditReceiptActivity.class); 
        returnIntent.putExtra("result", address); 
        setResult(RESULT_OK, returnIntent); 
        finish(); 
       } else { 
        Utils.showToast(getApplicationContext(), getString(R.string.c_unknownLocation), Toast.LENGTH_SHORT); 
       } 
      } 
     }); 

     cancel_btn.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       onBackPressed(); 
      } 
     }); 

     if (map == null) { 

      map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap(); 

      if (isGoogleMapsInstalled()) { 
       if (map != null) { 
        retrieveLocation(); 
       } 
      } else { 
       AlertDialog.Builder builder = new AlertDialog.Builder(this); 
       builder.setMessage("Install Google Maps"); 
       builder.setCancelable(false); 
       builder.setPositiveButton("Install", new DialogInterface.OnClickListener() { 
        @Override 
        public void onClick(DialogInterface dialogInterface, int i) { 
         Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=com.google.android.apps.maps")); 
         startActivity(intent); 

         //Finish the activity so they can't circumvent the check 
         finish(); 
        } 
       }); 
       AlertDialog dialog = builder.create(); 
       dialog.show(); 
      } 
     } 

    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 
     if (isSessionClosed) { 
      BugSenseHandler.startSession(this); 
      isSessionClosed = false; 
     } 
    } 

    @Override 
    protected void onPause() { 
     super.onPause(); 
     BugSenseHandler.closeSession(this); 
     isSessionClosed = true; 
    } 

    @Override 
    public void onBackPressed() { 
     map.clear(); 
     super.onBackPressed(); 
    } 

    private void retrieveLocation() { 
     Intent intent = getIntent(); 
     address = intent.getStringExtra("location"); 
     assert address != null; 
     if (address.equalsIgnoreCase("")) { 
      address = Utils.getCurrentLocation(LocationActivity.this); 
     } 
     rec_id = intent.getLongExtra("receipt_to_update_location", 0); 
     final Geocoder geocoder = new Geocoder(this, Locale.US); 
     double latitude = 0, longitude = 0; 
     try { 
      List<Address> loc = geocoder.getFromLocationName(address, 5); 
      if (loc.size() > 0) { 
       latitude = loc.get(0).getLatitude(); 
       longitude = loc.get(0).getLongitude(); 
      } else { 
       //Toast.makeText(getBaseContext(), getResources().getString(R.string.UnableToFindLocation),Toast.LENGTH_SHORT).show(); 
       Utils.showToast(LocationActivity.this, getString(R.string.UnableToFindLocation), Toast.LENGTH_SHORT); 
      } 


      selectedLoc = map.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title(address).draggable(true)); 
      map.setOnMarkerDragListener(new GoogleMap.OnMarkerDragListener() { 
       @Override 
       public void onMarkerDragStart(Marker marker) { 

       } 

       @Override 
       public void onMarkerDrag(Marker marker) { 

       } 

       @Override 
       public void onMarkerDragEnd(Marker marker) { 
        try { 
         List<Address> addresses = geocoder.getFromLocation(selectedLoc.getPosition().latitude, selectedLoc.getPosition().longitude, 1); 
         StringBuilder sb = new StringBuilder(); 
         if (addresses.size() > 0) { 
          Address address = addresses.get(0); 

          if (address.getAddressLine(0) != null) 
           sb.append(address.getAddressLine(0)).append(", "); 
          if (address.getLocality() != null) 
           sb.append(address.getLocality()).append(", "); 
          if (address.getCountryName() != null) 
           sb.append(address.getCountryName()); 
         } 

         address = sb.toString(); 
        } catch (IOException e) { 
        } 

       } 
      }); 

      map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(latitude, longitude), 12)); 

      // Zoom in, animating the camera. 
      map.animateCamera(CameraUpdateFactory.zoomTo(12), 2000, null); 

     } catch (IOException e) { 
      Log.e("IOException", e.getMessage()); 
      //Toast.makeText(this, getString(R.string.c_unknownLocation), Toast.LENGTH_LONG).show(); 
      Utils.showToast(LocationActivity.this, getString(R.string.c_unknownLocation), Toast.LENGTH_LONG); 
     } 

    } 

    public boolean isGoogleMapsInstalled() { 
     try { 
      ApplicationInfo info = getPackageManager().getApplicationInfo("com.google.android.apps.maps", 0); 
      return true; 
     } catch (PackageManager.NameNotFoundException e) { 
      return false; 
     } 
    } 

e la disposizione corrispondente:

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
       xmlns:custom="http://schemas.android.com/apk/res/ro.gebs.captoom" 
       android:id="@+id/location_stuff" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:background="@color/greenish" 
       android:orientation="vertical"> 

    <RelativeLayout 
      android:id="@+id/location_header" 
      android:layout_width="match_parent" 
      android:layout_height="0dp" 
      android:layout_weight="1" 
      android:background="@color/greenish"> 

     <RelativeLayout 
       android:id="@+id/cancel_btn" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_alignParentLeft="true" 
       android:layout_centerVertical="true" 
       android:layout_marginLeft="20dp" 
       android:background="@drawable/done_rounded_btn" 
       android:gravity="center"> 

      <ro.gebs.captoom.utils.fonts.CustomFontTextView 
        android:id="@+id/retake_txt" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_centerInParent="true" 
        android:layout_marginTop="10dp" 
        android:gravity="center" 
        android:paddingLeft="7dp" 
        android:paddingRight="7dp" 
        android:text="@string/cancel" 
        android:textAllCaps="true" 
        android:textColor="#FFFFFF" 
        android:textSize="14sp" 
        custom:fontName="Bold"/> 
     </RelativeLayout> 

     <ro.gebs.captoom.utils.fonts.CustomFontTextView 
       android:id="@+id/location_txt" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_centerHorizontal="true" 
       android:layout_centerVertical="true" 
       android:gravity="center_vertical" 
       android:text="@string/location_map" 
       android:textAllCaps="true" 
       android:textColor="@color/done_color" 
       android:textSize="16sp" 
       custom:fontName="SemiBold"/> 
    </RelativeLayout> 

    <fragment 
      android:layout_weight="6" 
      android:id="@+id/map" 
      android:layout_marginLeft="10dp" 
      android:layout_marginRight="10dp" 
      android:layout_width="match_parent" 
      android:layout_height="0dp" 
      class="com.google.android.gms.maps.SupportMapFragment"/> 


    <RelativeLayout 
      android:id="@+id/save_location_layout" 
      android:layout_width="match_parent" 
      android:layout_height="0dp" 
      android:layout_weight="1" 
      android:background="@color/greenish"> 

     <LinearLayout 
       android:id="@+id/delete_btn" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_centerHorizontal="true" 
       android:layout_centerVertical="true" 
       android:layout_marginLeft="25dp" 
       android:layout_marginRight="25dp" 
       android:background="@drawable/done_btn_selector" 
       android:orientation="horizontal" 
       android:paddingBottom="7dip" 
       android:paddingTop="7dip" 
       android:weightSum="7"> 

      <ro.gebs.captoom.utils.fonts.CustomFontTextView 
        android:id="@+id/delete_txt" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="6" 
        android:background="@null" 
        android:paddingLeft="10dp" 
        android:text="@string/save_location" 
        android:textAllCaps="true" 
        android:textColor="@color/white" 
        android:textSize="16sp" 
        custom:fontName="Bold"/> 

      <ImageView 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_gravity="center" 
        android:layout_weight="1" 

        android:paddingLeft="10dp" 
        android:paddingRight="10dp" 
        android:src="@drawable/input_map_white"/> 
     </LinearLayout> 
    </RelativeLayout> 

</LinearLayout> 

Answer 2

public class MapCurrentLoactionFragment extends Fragment { 
    public static MapView mapView; 

    public static GoogleMap map; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 

     View v = inflater.inflate(R.layout.fragment_currentlocation_map, 
       container, false); 
      try 
      { 

     // Gets the MapView from the XML layout and creates it 
     mapView = (MapView) v.findViewById(R.id.mapview); 

     mapView.onCreate(savedInstanceState); 
     mapView.onResume(); 
     // Gets to GoogleMap from the MapView and does initialization stuff 
     map = mapView.getMap(); 
     // Changing map type 
     map.setMapType(GoogleMap.MAP_TYPE_NORMAL); 
     // googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID); 
     // googleMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE); 
     // googleMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN); 
     // googleMap.setMapType(GoogleMap.MAP_TYPE_NONE); 

     // Showing/hiding your current location 
     map.setMyLocationEnabled(false); 

     // Enable/Disable zooming controls 
     map.getUiSettings().setZoomControlsEnabled(true); 

     // Enable/Disable my location button 
     map.getUiSettings().setMyLocationButtonEnabled(true); 

     // Enable/Disable Compass icon 
     map.getUiSettings().setCompassEnabled(true); 

     // Enable/Disable Rotate gesture 
     map.getUiSettings().setRotateGesturesEnabled(true); 

     // Enable/Disable zooming functionality 
     map.getUiSettings().setZoomGesturesEnabled(true); 

     MapsInitializer.initialize(this.getActivity()); 
     } 
      catch(Exception e) 
      { 
       System.out.println(e); 
      } 
     return v; 
    } 

XML: 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" > 

    <com.google.android.gms.maps.MapView 
     android:id="@+id/mapview" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" /> 

</LinearLayout>