Null pointer exception using maps API2 android?

Question

I am integrating maps in my application. The map is also shown in the application. But I am not able to find its view.

This is my fragment class.

    public static class PlaceholderFragment extends Fragment {

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.search_fragment,
                container, false);
        googleMap = ((SupportMapFragment) getFragmentManager()
                .findFragmentById(R.id.map)).getMap();
 //         googleMap.setMyLocationEnabled(true);
 //         googleMap.getUiSettings().setZoomControlsEnabled(false);
        return rootView;
    }
}

I am getting the null pointer exception..

Log cat is as follows:

     FATAL EXCEPTION: main

     : java.lang.RuntimeException: Unable to start activity ComponentInfo{com.herobike.main/com.herobike.service.SearchActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2062)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2087)
at android.app.ActivityThread.access$600(ActivityThread.java:133)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1198)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4803)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
at dalvik.system.NativeStart.main(Native Method)
   Caused by: java.lang.NullPointerException
at com.herobike.service.SearchActivity$PlaceholderFragment.onCreateView(SearchActivity.java:52)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1500)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:570)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1163)
at android.app.Activity.performStart(Activity.java:5018)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2035)

Line No: 52 is

    googleMap = ((SupportMapFragment) getFragmentManager()
                .findFragmentById(R.id.map)).getMap();

This is xml of fragment

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/sc_10"
tools:context="com.herobike.main.SearchActivity$PlaceholderFragment" >

   <fragment
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.MapFragment"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_marginBottom="2dp" />

What needs to be updated here?

Have you define that in your xml ??

Salman Khan
– Salman Khan

2014-04-07 07:19:57 +00:00
Commented Apr 7, 2014 at 7:19 — Salman Khan
– Salman Khan, Commented Apr 7, 2014 at 7:19
You are using map inside fragments ???

Salman Khan
– Salman Khan

2014-04-07 07:23:26 +00:00
Commented Apr 7, 2014 at 7:23 — Salman Khan
– Salman Khan, Commented Apr 7, 2014 at 7:23
can you just post your xml...

Salman Khan
– Salman Khan

2014-04-07 07:27:16 +00:00
Commented Apr 7, 2014 at 7:27 — Salman Khan
– Salman Khan, Commented Apr 7, 2014 at 7:27
check and try the solution and see the explanation.

Salman Khan
– Salman Khan

2014-04-07 07:30:49 +00:00
Commented Apr 7, 2014 at 7:30 — Salman Khan
– Salman Khan, Commented Apr 7, 2014 at 7:30
got the explanation @Shink ???

Salman Khan
– Salman Khan

2014-04-07 07:33:03 +00:00
Commented Apr 7, 2014 at 7:33 — Salman Khan
– Salman Khan, Commented Apr 7, 2014 at 7:33

GrIsHu · Accepted Answer · 2014-04-07 07:26:11Z

2

In your layout file instead of MapFragment you need to write SupportMapFragment as you have already accessed it using SupportMapFragment .So change it as below:

 <fragment
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_marginBottom="2dp" />

Also initialize your map as below:

 googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                                    .getMap();

answered Apr 7, 2014 at 7:26

GrIsHu

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7 Comments

Raghunandan Over a year ago

@Shink this still does not solve the problem coz you want map inside of a fragment. In any case if that was the problem you should get a classcastexcpetion

Raghunandan Over a year ago

@GrIsHu he will face problem later coz he mentions that he wants map inside a fragment.

WISHY Over a year ago

@Raghunandan I am not getting any exception. And the map is working fine.

Raghunandan Over a year ago

@Shink good luck. I don't think you have a map inside of a fragment

WISHY Over a year ago

@Raghunandan the map is inside the fragment only

|

Community · Accepted Answer · 2017-05-23 12:06:41Z

Check if you have referenced the id of fragment right.

public final GoogleMap getMap ()

Gets the underlying GoogleMap that is tied to the view wrapped by this fragment.

Returns
the GoogleMap. Null if the view of the fragment is not yet ready.

This can happen if the fragment lifecyle have not gone through onCreateView(LayoutInflater, ViewGroup, Bundle) yet. This can also happen if Google Play services is not available. If Google Play services becomes available afterwards and the fragment have gone through onCreateView(LayoutInflater, ViewGroup, Bundle), calling this method again will initialize and return the GoogleMap.

It is better to chekc the availability of google play services before initializing map object.

Edit:

yes inside fragment

What you have done

android:name="com.google.android.gms.maps.MapFragment"

Its a MapFragment.

But you have

googleMap = ((SupportMapFragment) getFragmentManager()
            .findFragmentById(R.id.map)).getMap();

which is wrong

What you need to do

So you want map inside a fragment. So you need to extend MapFragment instead of Fragment or you should use MapView

Check the below

Android - android.view.InflateException: Binary XML file line #8: Error inflating class fragment

Priya · Accepted Answer · 2014-04-07 07:22:10Z

0

pLease try this ,let me know if any concern

if (googleMap == null)
            {
                googleMap = ((SupportMapFragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.map_history)).getMap();
        }

answered Apr 7, 2014 at 7:22

Priya

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1 Comment

Priya Over a year ago

@Shink Please try at once in onResume method

codeRider · Accepted Answer · 2014-04-07 07:25:27Z

0

try this

googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(
                R.id.map)).getMap();

and make the following changes in your layout

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

answered Apr 7, 2014 at 7:25

codeRider

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Comments

Salman Khan · Accepted Answer · 2014-04-07 07:29:12Z

0

use supportmapfragment :-

<fragment
                android:id="@+id/map"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                class="com.google.android.gms.maps.SupportMapFragment" />

answered Apr 7, 2014 at 7:29

Salman Khan

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1 Comment

Salman Khan Over a year ago

You are using MapFragment in your xml and inflating it with SupportMapFragment, that's why causing error.

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