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 · 2015-01-27T12:53:46.600

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 '15 at 12:53

answered Jan 27 '15 at 11:22

ravidl

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1

getChildFragmentManager() this method is not find. – SAndroidD Mar 09 '16 at 10:50
1

Awesome! Worked for me as well. – Karan Mar 23 '16 at 22:27
Genius! Was looking for ages how to do this in my fragment. – Adam Short Mar 31 '16 at 19:42

score 3 · Answer 2 · answered Apr 25 '16 at 05:03

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 '16 at 05:03

Shree Krishna

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score 1 · Answer 3 · edited Jul 28 '16 at 12:48

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 '16 at 12:48

Community

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1

answered Jun 16 '16 at 05:51

Krishna

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score 0 · Answer 4 · answered Jan 23 '15 at 17:49

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 '15 at 17:49

ztan

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Thanks for reply ztan. But I've implemented OnMapReadyCallback which overrides onMapReady() method! – ravidl Jan 27 '15 at 06:30

score 0 · Answer 5 · edited May 21 '18 at 05:59

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

score 0 · Answer 6 · answered Mar 12 '19 at 19:00

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 '19 at 19:00

Darksymphony

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

6 Answers6

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