Null pointer exception at mapFragment.getMapAsync(this) while initializing google map

Question

When I use v6.5.87 of Google Play Services, I get a null pointer exception when I call getMapAsync(). I'm using a SupportMapFragment in my Fragment's xml layout.

My code:

SupportMapFragment mapFragment = (SupportMapFragment) getActivity()
        .getSupportFragmentManager().findFragmentById(R.id.mapFragment);

mapFragment.getMapAsync(this);

Note: There's no problem when calling getMap() on older Google Play Services versions, but getMap() is now deprecated (docs).

Here's the stack trace for the NPE:

java.lang.NullPointerException
            at com.decos.fixi.fragments.FragmentLocationMap.initializeMap(FragmentLocationMap.java:132)
            at com.decos.fixi.fragments.FragmentLocationMap.onCreateView(FragmentLocationMap.java:95)
            at android.support.v4.app.Fragment.performCreateView(Fragment.java:1786)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1126)
            at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:739)
            at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1489)
            at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:454)
            at android.os.Handler.handleCallback(Handler.java:615)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4921)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
            at dalvik.system.NativeStart.main(Native Method)

Fugazy

Answer 1

Finally I got the answer!

SupportMapFragment mapFragment = (SupportMapFragment) this.getChildFragmentManager()
                .findFragmentById(R.id.mapFragment);

instead of

SupportMapFragment mapFragment = (SupportMapFragment) this.getSupportFragmentManager()
                .findFragmentById(R.id.mapFragment);

getChildFragmentManager() did the trick.

Fugazy

getChildFragmentManager() this method is not find. – Mclaurin

Awesome! Worked for me as well. – Vittoria

Genius! Was looking for ages how to do this in my fragment. – Kataway

Answer 2

In addition, If you are using SupportMapFragment mapFragment = (SupportMapFragment).....

Then be sure you have set this class attribute in XML

class="com.google.android.gms.maps.SupportMapFragment"

Not

class ="com.google.android.gms.maps.MapFragment"

Compaction

Answer 3

In AppCompatActivity extend

FragmentManager mFragmentManager = getSupportFragmentManager();
SupportMapFragment mVTMapFragment =(SupportMapFragment)mFragmentManager.findFragmentById(R.id.mapRideview);
mVTMapFragment.getMapAsync(this);

and implement onMapReady callback method

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    setUpMap();
}

Lubbock

Answer 4

Have you implement the callback function for your getMapAsync()?

If not, You need to implement the onMapReady() method in your code, and then you can do adding markers or moving camera stuff in your onMapReady() method.

You can see this example about onMapReady().

Agosto

Thanks for reply ztan. But I've implemented OnMapReadyCallback which overrides onMapReady() method! – Fugazy

Answer 5

Heading

run your program by adding this

 SupportMapFragment supportMapFragment

ADD THIS in ON CREATE METHOD()

supportMapFragment = SupportMapFragment.newInstance(); 

FragmentManager fm = getFragmentManager();
fm.beginTransaction().replace(R.id.maplayout, new MapFragmentClass()).commit();
supportMapFragment.getMapAsync(this);

android.support.v4.app.FragmentManager sfm = getSupportFragmentManager();
sfm.beginTransaction().add(R.id.map,supportMapFragment).commit();

this will work check it

Janettajanette

Answer 6

that will work only inside of a fragment. For those who have activity and not fragment getChildFragmentManager() will not work.

Simply use

  if (mapFragment != null) {
            mapFragment.getMapAsync(this);
        }

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