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)

ravidl · Accepted Answer · 2015-01-27 12:53:46Z

32

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.

edited Jan 27, 2015 at 12:53

answered Jan 27, 2015 at 11:22

ravidl

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3 Comments

SAndroidD Over a year ago

getChildFragmentManager() this method is not find.

Karan Over a year ago

Awesome! Worked for me as well.

Adam Short Over a year ago

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

Shree Krishna · Accepted Answer · 2016-04-25 05:03:48Z

3

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"

answered Apr 25, 2016 at 5:03

Shree Krishna

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Comments

Community · Accepted Answer · 2016-07-28 12:48:29Z

1

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();
}

edited Jul 28, 2016 at 12:48

CommunityBot

11 silver badge

answered Jun 16, 2016 at 5:51

Krishna

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Comments

ztan · Accepted Answer · 2015-01-23 17:49:01Z

0

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().

answered Jan 23, 2015 at 17:49

ztan

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1 Comment

ravidl Over a year ago

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

Nick Betcher · Accepted Answer · 2018-05-21 05:59:18Z

0

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

edited May 21, 2018 at 5:59

Nick Betcher

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answered Jul 7, 2016 at 7:37

Bhupendra Singh

1

Comments

Darksymphony · Accepted Answer · 2019-03-12 19:00:39Z

0

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);
        }

answered Mar 12, 2019 at 19:00

Darksymphony

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