mapFragment.getMapAsync(this) - NullPointerException

Question

I am using com.google.android.gms:play-services-maps:7.5.0 version of Google Maps services. When trying to call the below I get java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.maps.SupportMapFragment.getMapAsync(com.google.android.gms.maps.OnMapReadyCallback)' on a null object reference.

@Override public View onCreateView(LayoutInflater inflater, ViewGroup container,                          Bundle savedInstanceState) {     SupportMapFragment mapFragment = (SupportMapFragment) getActivity().getSupportFragmentManager()             .findFragmentById(R.id.map);     mapFragment.getMapAsync(this); //error      return inflater.inflate(R.layout.fragment_example_map, container, false); } 

fragment_example_map.xml file:

<FrameLayout 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"     tools:context="app.ExampleMap">      <fragment xmlns:android="http://schemas.android.com/apk/res/android"         android:name="com.google.android.gms.maps.SupportMapFragment"         android:id="@+id/map"         android:layout_width="match_parent"         android:layout_height="match_parent"/> </FrameLayout> 

Answer 1

My comment in maps with fragment , first you should refrenece your view as you will call something from it , this is why I inflate my view first
View view = inflater.inflate(R.layout.activity_maps, null, false);

Second call child fragment manager this.getChildFragmentManager() instead of getActivity().getSupportFragmentManager()

Here is the full example to view map

import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup;  import com.google.android.gms.maps.CameraUpdateFactory; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.OnMapReadyCallback; import com.google.android.gms.maps.SupportMapFragment; import com.google.android.gms.maps.model.LatLng; import com.google.android.gms.maps.model.MarkerOptions;  public class ClinicFragment extends Fragment implements OnMapReadyCallback {      private GoogleMap mMap;      public static ClinicFragment newInstance() {         ClinicFragment fragment = new ClinicFragment();         return fragment;     }      @Nullable     @Override     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {         View view = inflater.inflate(R.layout.activity_maps, null, false);          SupportMapFragment mapFragment = (SupportMapFragment) this.getChildFragmentManager()                 .findFragmentById(R.id.map);         mapFragment.getMapAsync(this);          return view;     }       /**      * Manipulates the map once available.      * This callback is triggered when the map is ready to be used.      * This is where we can add markers or lines, add listeners or move the camera. In this case,      * we just add a marker near Sydney, Australia.      * If Google Play services is not installed on the device, the user will be prompted to install      * it inside the SupportMapFragment. This method will only be triggered once the user has      * installed Google Play services and returned to the app.      */     @Override     public void onMapReady(GoogleMap googleMap) {         mMap = googleMap;          // Add a marker in Sydney and move the camera         LatLng sydney = new LatLng(-34, 151);         mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));         mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));     } } 

required permission

<permission     android:name="your.package.name.permission.MAPS_RECEIVE"     android:protectionLevel="signature" /> <uses-permission android:name="your.package.name.permission.MAPS_RECEIVE"/>  <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 

plus feature element

<uses-feature     android:glEsVersion="0x00020000"     android:required="true"/> 

most import google maps key

<meta-data     android:name="com.google.android.maps.v2.API_KEY"     android:value="your_key_here" /> 

Update add this meta data if you face Error inflating class fragment

<meta-data        android:name="com.google.android.geo.API_KEY"         android:value="your_key_here" /> 

summery for mainfest

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="your.package.name" > // permission here   <application         android:name=".Activities.MyApplication"         android:allowBackup="true"         android:icon="@mipmap/ic_launcher"         android:label="@string/app_name"         android:theme="@style/AppTheme" >      // feature element      // maps key    </application>  </manifest> 

activity_maps.xml

<fragment xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:map="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:id="@+id/map"     android:name="com.google.android.gms.maps.SupportMapFragment"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context="com.imaadv.leaynik.ClinicFragment" /> 

Answer 2

use getChildFragmentManager() in place of getActivity().getSupportFragmentManager() in the fragment.

like:

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