L'app si arresta in modo anomalo quando si usa map in fragment in android?

Question

ho utilizzato il cassetto di navigazione in attività barra delle azioni ora ho usato più frammenti nella stessa attività ma il problema è quando carico per la prima volta mapfragment è visualizzato perfettamente ma quando premo backbutton la mia app si blocca è visualizza l'eccezione di argomento illegale.

Mapfragment.java

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.net.HttpURLConnection; 
import java.net.URL; 
import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 

import org.json.JSONObject; 

import com.compass.DirectionsJSONParser; 
import com.compass.GPSTracker; 
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.SupportMapFragment; 
import com.google.android.gms.maps.model.BitmapDescriptorFactory; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.MarkerOptions; 
import com.google.android.gms.maps.model.PolylineOptions; 
import android.graphics.Color; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 

public class MapFragment extends Fragment { 

    GoogleMap googlemap; 
    GPSTracker gps; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 
     return inflater.inflate(R.layout.fragment_map,container,false); 
    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     setRetainInstance(true); 
     super.onCreate(savedInstanceState); 
    } 

    @Override 
    public void onActivityCreated(Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 

     gps=new GPSTracker(getActivity()); 
     googlemap = ((SupportMapFragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.mapviews)).getMap(); 
     MapsInitializer.initialize(getActivity().getApplicationContext()); 

     // current location 
     double currentlat=gps.getLatitude(); 
     double currentlon=gps.getLongitude(); 

     // destination location 
     //double destlat=23.048854; 
     //double destlon=72.516059; 

     double destlat=22.9833; 
     double destlon=72.5000; 

     final LatLng currentpoint = new LatLng(currentlat,currentlon); 
     final LatLng destinationpoint = new LatLng(destlat,destlon); 

     // fro add marker on map 
     googlemap.addMarker(new MarkerOptions() 
       .position(new LatLng(currentlat, currentlon)) 
       .title("Current Location") 
       .icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_source))); 

     googlemap.animateCamera(CameraUpdateFactory.zoomTo(237.0f)); 
     googlemap.moveCamera(CameraUpdateFactory.newLatLng(currentpoint)); 

     googlemap.addMarker(new MarkerOptions() 
     .position(new LatLng(destlat, destlon)) 
     .title("WebOffice") 
     .icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_destination))); 

     /* 
     String url = getDirectionsUrl(currentpoint, destinationpoint);    
     DownloadTask downloadTask = new DownloadTask(); 

     // Start downloading json data from Google Directions API 
     downloadTask.execute(url); 
     */ 

    } 

fragment_map.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 

    <fragment 
     android:id="@+id/mapviews" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     class="com.google.android.gms.maps.SupportMapFragment" /> 

</LinearLayout> 

Logcat

12-09 11:48:05.165: E/AndroidRuntime(9701): FATAL EXCEPTION: main 
    12-09 11:48:05.165: E/AndroidRuntime(9701): Process: com.weboffice, PID: 9701 
    12-09 11:48:05.165: E/AndroidRuntime(9701): android.view.InflateException: Binary XML file line #7: Error inflating class fragment 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at com.weboffice.MapFragment.onCreateView(MapFragment.java:45) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.support.v4.app.Fragment.performCreateView(Fragment.java:1500) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:938) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1115) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1478) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:446) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.os.Handler.handleCallback(Handler.java:733) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.os.Handler.dispatchMessage(Handler.java:95) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.os.Looper.loop(Looper.java:136) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at java.lang.reflect.Method.invokeNative(Native Method) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at java.lang.reflect.Method.invoke(Method.java:515) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at dalvik.system.NativeStart.main(Native Method) 
    12-09 11:48:05.165: E/AndroidRuntime(9701): Caused by: java.lang.IllegalArgumentException: Binary XML file line #7: Duplicate id 0x7f0b005c, tag null, or parent id 0x0 with another fragment for com.google.android.gms.maps.SupportMapFragment 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:296) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685) 
    12-09 11:48:05.165: E/AndroidRuntime(9701):  ... 19 more 

Answer 1

uso di questo codice

@Override 
public void onDestroyView() {  
    super.onDestroyView(); 

    try { 
     Fragment fragment = (getFragmentManager() 
       .findFragmentById(R.id.map)); 
     FragmentTransaction ft = getActivity().getSupportFragmentManager() 
       .beginTransaction(); 
     ft.remove(fragment); 
     ft.commit(); 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
} 

e segnare questa ans su se questo aiuta

Answer 2

funzionano anche come questo

@Override 
    public void onDestroyView() { 
     try{ 
      SupportMapFragment fragment = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.mapviews)); 
      FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction(); 
      ft.remove(fragment); 
      ft.commit(); 
      }catch(Exception e){ 
      } 

     super.onDestroyView(); 
    } 

Answer 3

Invece di dichiarare de SupportMapFragment nel layout, farlo programatically e assicurati di utilizzare getChildFragmentMananger al posto del classico getFragmentManager() per creare il frammento.

mMapFragment = SupportMapFragment.newInstance(); 
FragmentTransaction fragmentTransaction = 
     getChildFragmentManager().beginTransaction(); 
fragmentTransaction.add(R.id.map_root, mMapFragment); 
fragmentTransaction.commit(); 

Tenere questo SupportMapFragment mMapFragment in quanto sarà necessario per recuperare l'oggetto GoogleMap:

GoogleMap map = mMapFragment.getMap();