Erro ao inflar o Google Maps

<uses-permission android:name="android.permission.CALL_PHONE" />
<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="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-feature android:glEsVersion="0x00020000" android:required="true"/>

<meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version"/>
    <meta-data
        android:name="com.google.android.geo.API_KEY"
        android:resource="@string/API_KEY" />

<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="ufmg.observatorio.aondeir.MapaFragment">

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

</FrameLayout>

public class MapaFragment extends Fragment implements OnMapReadyCallback {


    private Local local;
    private GoogleMap map;

    public MapaFragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_mapa, container, false);
        SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.mapFragment);
        //Inicia o google maps
        mapFragment.getMapAsync(this);
        local = this.getActivity().getIntent().getParcelableExtra("local");
        return view;
    }

    @Override
    public void onMapReady(GoogleMap map) {
        //O metodo onMapReady é chamado quando a inicialização do mapa estiver ok
        this.map = map;
        if (local != null) {
            //Ativa o botão para mostrar minha localização
            map.setMyLocationEnabled(true);
            //Posiciona o mapa na coordenada do local
            LatLng localizacao = new LatLng(local.latitude,local.longitude);
            CameraUpdate atualiza = CameraUpdateFactory.newLatLngZoom(localizacao,13);
            map.moveCamera(atualiza);
            //Marca o local
            MarkerOptions marcacao = new MarkerOptions();
            if(local.nome != null){
                marcacao.title(local.nome);
            }
            if(local.descricao != null){
                marcacao.snippet(local.descricao);
            }
            marcacao.position(localizacao);
            map.addMarker(marcacao);
            //Tipo de mapa
            map.setMapType(GoogleMap.MAP_TYPE_NONE);

        }
    }
}

E/AndroidRuntime: FATAL EXCEPTION: main

Process: ufmg.observatorio.aondeir, PID: 2337

android.view.InflateException: Binary XML file line #7: Binary XML file line #7: Error inflating class fragment

Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment

Caused by: java.lang.RuntimeException: API key not found.  Check that  is in the  element of AndroidManifest.xml

at maps.y.k.b(Unknown Source)

at maps.v.c.a(Unknown Source)

at com.google.android.gms.maps.internal.CreatorImpl.b(Unknown Source)

at com.google.android.gms.maps.internal.CreatorImpl.newMapFragmentDelegate(Unknown Source)

at xg.onTransact(:com.google.android.gms.DynamiteModulesB:62)

at android.os.Binder.transact(Binder.java:499)

at trn.newMapFragmentDelegate(:com.google.android.gms:179)

at com.google.android.gms.maps.internal.CreatorImpl.newMapFragmentDelegate(:com.google.android.gms:99)

at trm.onTransact(:com.google.android.gms:62)

at android.os.Binder.transact(Binder.java:499)

at com.google.android.gms.maps.internal.zzc$zza$zza.zzH(Unknown Source)

at com.google.android.gms.maps.SupportMapFragment$zzb.zzIL(Unknown Source)

at com.google.android.gms.maps.SupportMapFragment$zzb.zza(Unknown Source)

at com.google.android.gms.dynamic.zza.zza(Unknown Source)

at com.google.android.gms.dynamic.zza.onInflate(Unknown Source)

at com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown Source)

at android.support.v4.app.Fragment.onInflate(Fragment.java:1174)

at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2414)

at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)

at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:189)

at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:769)

at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)

at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)

at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)

at android.view.LayoutInflater.inflate(LayoutInflater.java:518)

at android.view.LayoutInflater.inflate(LayoutInflater.java:426)

at ufmg.observatorio.aondeir.MapaFragment.onCreateView(MapaFragment.java:39)

at android.support.v4.app.Fragment.performCreateView(Fragment.java:2080)

at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1108)

at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1290)

at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801)

at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1677)

at android.support.v4.app.Fragment.performStart(Fragment.java:2102)

at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1146)

at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1290)

at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801)

at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1638)

at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:679)

at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)

at android.support.v4.view.ViewPager.populate(ViewPager.java:1240)

at android.support.v4.view.ViewPager.populate(ViewPager.java:1088)

at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1614)

at android.view.View.measure(View.java:19734)

at android.widget.LinearLayout.measureVertical(LinearLayout.java:911)

at android.widget.LinearLayout.onMeasure(LinearLayout.java:640)

at android.view.View.measure(View.java:19734)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)

at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

at android.view.View.measure(View.java:19734)

E/AndroidRuntime:     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)

at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464)

at android.widget.LinearLayout.measureVertical(LinearLayout.java:758)

at android.widget.LinearLayout.onMeasure(LinearLayout.java:640)

at android.view.View.measure(View.java:19734)

at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1085)

at android.view.View.measure(View.java:19734)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)

at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)

at android.view.View.measure(View.java:19734)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)

at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464)

at android.widget.LinearLayout.measureVertical(LinearLayout.java:758)

at android.widget.LinearLayout.onMeasure(LinearLayout.java:640)

at android.view.View.measure(View.java:19734)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)

at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

at android.view.View.measure(View.java:19734)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)

at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1464)

at android.widget.LinearLayout.measureVertical(LinearLayout.java:758)

at android.widget.LinearLayout.onMeasure(LinearLayout.java:640)

at android.view.View.measure(View.java:19734)

at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6120)

at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

at com.android.internal.policy.DecorView.onMeasure(DecorView.java:687)

at android.view.View.measure(View.java:19734)

at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2271)

at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1358)

at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1607)

at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1246)

at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6301)

at android.view.Choreographer$CallbackRecord.run(Choreographer.java:871)

at android.view.Choreographer.doCallbacks(Choreographer.java:683)

at android.view.Choreographer.doFrame(Choreographer.java:619)

at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:857)

at android.os.Handler.handleCallback(Handler.java:751)

at android.os.Handler.dispatchMessage(Handler.java:95)

at android.os.Looper.loop(Looper.java:154)

at android.app.ActivityThread.main(ActivityThread.java:6077)

at java.lang.reflect.Method.invoke(Native Method)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

Application terminated.