UPDATED I read many topics but nothing helped or I didn't understand what to do. I get null and I don't know why. I am just learning so please help me.
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 at com.example.text.fragments.MapFragment.initilizeMap(MapFragment.java:52) at com.example.text.fragments.MapFragment.onViewCreated(MapFragment.java:46) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:971) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1136) at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:739) at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1499) at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:488) at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163) at android.support.v4.view.ViewPager.populate(ViewPager.java:1073) at android.support.v4.view.ViewPager.populate(ViewPager.java:919) at android.support.v4.view.ViewPager$3.run(ViewPager.java:249) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:792) at android.view.Choreographer.doCallbacks(Choreographer.java:596) at android.view.Choreographer.doFrame(Choreographer.java:556) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:778) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:155) at android.app.ActivityThread.main(ActivityThread.java:5696) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1028) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823) This is Fragment where I implemented getMap
public class MapFragment extends Fragment implements OnMapReadyCallback{ private GoogleMap googleMap; /** * function to load map. If map is not created it will create it for you * */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.map_fragment, container, false); return view; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { // TODO Auto-generated method stub super.onViewCreated(view, savedInstanceState); // here, as doc say, the map can be initialized, or the service is not available initilizeMap(); } private void initilizeMap() { if (googleMap == null) { ((SupportMapFragment) getActivity().getSupportFragmentManager().findFragmentById( R.id.map)).getMapAsync(this); // check if map is created successfully or not if (googleMap == null) { Toast.makeText(getActivity().getApplicationContext(), "Sorry! unable to create maps", Toast.LENGTH_SHORT) .show(); } } } @Override public void onMapReady(GoogleMap mGoogleMap) { googleMap = mGoogleMap; } } This is map_fragment.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <fragment android:id="@+id/map" android:name="com.google.android.gms.maps.SupportMapFragment" android:layout_width="match_parent" android:layout_height="match_parent"/> </RelativeLayout> This is my manifest
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.test" > <permission android:name="com.example.test.permission.MAPS_RECEIVE" android:protectionLevel="signature" /> <uses-permission android:name="com.example.test.permission.MAPS_RECEIVE" /> <uses-sdk android:minSdkVersion="17" android:targetSdkVersion="22" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <!-- Required to show current location --> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <!-- Required OpenGL ES 2.0. for Maps V2 --> <uses-feature android:glEsVersion="0x00020000" android:required="true" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" android:supportsRtl="true"> <activity android:name=".MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="AIzaSyBUeq6ANw9MyK9vwB4phnSOkp6e_UccN4E" /> </application> </manifest> I use sliding tabs and in one tab has to have map. I create this map in this part of code in ViewPagerAdapter:
@Override public Fragment getItem(int position) { if(mNumbOfTabs == 3) { if (position == 0) { A a = new A(); return a; } else if (position == 1) { B b = new B(); return b; } else { MapFragment mapFragment = new MapFragment(); return mapFragment; } }