NullPointerException SupportMapFragment.getMapAsync

Question

Merhaba SupportMapFragment kullanarak bir parçada haritayı görüntüleyeceğim bir uygulama oluşturmaya çalışıyorum ancak NullPointerException alıyorum.

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

    <include 
     android:id="@+id/searchToolbar" 
     layout="@layout/toolbar" /> 
    <com.google.android.gms.maps.MapView 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:id="@+id/map_container" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" > 
    </com.google.android.gms.maps.MapView> 

</LinearLayout> 

Burada birisi rakam yapmış Can Ne hata

public class Search extends Fragment{ 
    GoogleMap mGoogleMap; 

    public static Search newInstance() { 
     Search fragment = new Search(); 
     return fragment; 
    } 

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

     final View view = inflater.inflate(R.layout.search_layout, null, false); 


     SupportMapFragment mapFragment = (SupportMapFragment) this.getChildFragmentManager() 
       .findFragmentById(R.id.map_container); 
     mapFragment.getMapAsync(new OnMapReadyCallback() { 
      @Override 
      public void onMapReady(GoogleMap googleMap) { 
       mGoogleMap = googleMap; 

       // Add a marker in Sydney and move the camera 
       LatLng sydney = new LatLng(-34, 151); 
       mGoogleMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney")); 
       mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney)); 
      } 
     }); 

     return view; 
    } 
} 

search_layout.xml: İşte tam hata kodu

java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.maps.SupportMapFragment.getMapAsync(com.google.android.gms.maps.OnMapReadyCallback)' on a null object reference 
at obs.sharemytable.fragment.Search.onCreateView(Search.java:49) 
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1974) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252) 
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738) 
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617) 
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:145) 
at android.app.ActivityThread.main(ActivityThread.java:6918) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199) 

Search.java olduğunu.

Answer 1

Teşekkür @MojioMS şimdi onun benim için çalışıyor. İşte işe koyduğum değişiklikler.

Değişim SupportMapFragment o zaman olmaz boş işaretçi istisna başlatılıyor sonra

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

    <include 
     android:id="@+id/searchToolbar" 
     layout="@layout/toolbar" /> 
    <fragment 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:id="@+id/map_container" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     class="com.google.android.gms.maps.SupportMapFragment"> 
    </fragment> 

</LinearLayout> 

Answer 2

faaliyetinden FragmentManager alma ve harita almak için kullanmayı deneyin:

FragmentManager mFragmentManager = getActivity().getSupportFragmentManager(); 

final SupportMapFragment mapFragment = (SupportMapFragment) mFragmentManager 
      .findFragmentById(R.id.map_container); 

Answer 3

SupportMapFragment mapFragment = ((SupportMapFragment) getActivity().fragmentManager.findFragmentById(R.id.location_map)) 

Answer 4

Eğer gecikme kullanmak için bu search_layout.xml

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

    <include 
     android:id="@+id/searchToolbar" 
     layout="@layout/toolbar" /> 
    <com.google.android.gms.maps.MapView 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:id="@+id/map_container" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" > 
    </com.google.android.gms.maps.MapView> 

</LinearLayout> 

.