Map-Fragment (v2) Nullpointer (question under Lollipop?)
I ran into a bug in my application when I run it in Android Lollipop. Logcat says:
java.lang.NullPointerException:
Attempt to invoke virtual method 'com.google.android.gms.maps.GoogleMap.
com.google.android.gms.maps.MapFragment.getMap()' on a null object reference
This error only shows up in Android Lollipop, the same app works without issue on other devices *.
Here is the code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="@+id/map_side_holder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/BlueGreyL3"
android:orientation="horizontal"
android:weightSum="100">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/map_margin_left_24dp"
android:layout_marginStart="@dimen/map_margin_left_24dp"
android:layout_weight="8"
android:orientation="vertical">
<!-- MAP -->
<fragment
android:id="@+id/location_map"
class="com.google.android.gms.maps.MapFragment"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>
<!-- Ads -->
<LinearLayout
android:id="@+id/linlay_wrb"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
</LinearLayout>
</RelativeLayout>
A snippet of Google Map v2 is loaded into my class LocationFragments.java
by calling
// View
try {
mView = inflater.inflate(R.layout.location_fragment, container, false);
sMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.location_map)).getMap();
mSideHolder = (LinearLayout) mView.findViewById(R.id.map_side_holder);
I am using AndroidStudio, so here build.gradle
:
android {
compileSdkVersion 21
buildToolsVersion "21.1.1"
defaultConfig {
minSdkVersion 15
targetSdkVersion 21
}
[...]
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:support-v13:21.0.0'
compile 'com.android.support:support-v4:21.0.0'
compile 'com.google.android.gms:play-services:5.0.89'
}
and the manifest:
<!-- Google Play -->
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version"/>
<!-- Maps -->
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value=""/>
I don't understand what I did wrong. Is it possible the problem is caused by Lollipop itself?
Thanks in advance,
Martin
* Checking devices:
- HTC One M8 - 4.4.4 (GPE / API 19) → Works
- Samsung S4 Mini - 4.4.2 (CM11 / API 19) → Works
- Samsung S2 - 4.0.3 (ICS / API 15) → works
- HTC One M8 - 5.0 (LL / API 20) → error loading map.
- Nexus 5 - 5.0 (LL / API 20) → error while loading map
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Try moving getMap
to onResume
. I honestly don't know the exact answer, its just trial and error and voila! his job.
But what I think translates it to onResume
, make sure Activity/Fragment
( onCreate
) was created and run ( onStart
).
UPDATE
And update google play services
to the latest version.
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I have exactly the same problem on HTC M8 5.0, but only moving the code on onResume
didn't help. Instead, I found that it worked if I used getChildFragment()
instead of the usual one getFragmentManager()
.
The code I am now using to get the reference to the map object (under onResume
):
MapFragment mapFragment = (MapFragment) getChildFragmentManager().findFragmentById(R.id.mapsfragment_map);
if(mapFragment == null){
return;
}
map = mapFragment.getMap();
Hope this helps!
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I have the same problem. FragmentManager issue. Best solution for me:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
sMap = ((MapFragment) (getChildFragmentManager().findFragmentById(R.id.location_map)).getMap();
} else {
sMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.location_map)).getMap();
}
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