android MapView in Fragment

Question

möchte ich meine MapView innen Fragment

haben diese meine FragmentLayout XML-Datei ist

<?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:background="#17df0d" 
    android:orientation="vertical" > 

<com.google.android.gms.maps.MapView 
    android:id="@+id/mapview" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_above="@+id/textView1" 
    android:layout_alignParentLeft="true" 
    android:layout_alignParentRight="true" 
    android:layout_marginBottom="70dp" > 

</com.google.android.gms.maps.MapView> 
</RelativeLayout> 

Meine AndroidManifest.xml Datei

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="a.b.c.d" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="11" 
     android:targetSdkVersion="17" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 

     <meta-data 
      android:name="com.google.android.maps.v2.API_KEY" 
      android:value="your_api_key" /> 
     <meta-data 
      android:name="com.google.android.gms.version" 
      android:value="@integer/google_play_services_version" /> 


    </application> 

    <uses-permission android:name="android.permission.CAMERA" /> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
    <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.ACCESS_COARSE_LOCATION" /> 
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 

    <permission 
     android:name="a.b.c.d.permission.MAPS_RECEIVE" 
     android:protectionLevel="signature" /> 

    <uses-permission android:name="a.b.c.d.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" /> 

</manifest> 

und meine Fragment Klasse

public class ReportFragment extends Fragment implements LocationListener { 
    MapView mapView = null; //eventually it is being read from view and assigned 

, wenn ich die App starten, ich sehe jede Kartenansicht nicht

Answer 1

Von Josh Holtz's example on GitHub in meinem Fragment:

Sie MapView in Ihrem Layout wie

<com.google.android.gms.maps.MapView 
    android:id="@+id/mapview" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" /> 

hinzufügen und implementieren sollten Ihre Fragment wie

public class SomeFragment extends Fragment { 

MapView mapView; 
GoogleMap map; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)   { 
    View v = inflater.inflate(R.layout.some_layout, container, false); 

    // Gets the MapView from the XML layout and creates it 
    mapView = (MapView) v.findViewById(R.id.mapview); 
    mapView.onCreate(savedInstanceState); 

    // Gets to GoogleMap from the MapView and does initialization stuff 
    map = mapView.getMap(); 
    map.getUiSettings().setMyLocationButtonEnabled(false); 
    map.setMyLocationEnabled(true); 

    // Needs to call MapsInitializer before doing any CameraUpdateFactory calls 
    try { 
     MapsInitializer.initialize(this.getActivity()); 
    } catch (GooglePlayServicesNotAvailableException e) { 
     e.printStackTrace(); 
    } 

    // Updates the location and zoom of the MapView 
    CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(43.1, -87.9), 10); 
    map.animateCamera(cameraUpdate); 

    return v; 
} 

@Override 
public void onResume() { 
    mapView.onResume(); 
    super.onResume(); 
} 

@Override 
public void onDestroy() { 
    super.onDestroy(); 
    mapView.onDestroy(); 
} 

@Override 
public void onLowMemory() { 
    super.onLowMemory(); 
    mapView.onLowMemory(); 
    } 

} 

Answer 2

Hinzufügen zu MD's Antwort er:

Von documentation:

A GoogleMap erworben werden müssen mit getMapAsync (OnMapReadyCallback). Die MapView initialisiert das Kartensystem und die Ansicht automatisch.

dazu Nach der richtigere Weg GoogleMap initialisiert wird mit getMapAsync.

Beachten Sie, dass Ihre Klasse OnMapReadyCallback

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    View v = inflater.inflate(R.layout.fragment_map_page, container, false); 

    mMapView = (MapView) v.findViewById(R.id.map_view); 
    mMapView.onCreate(savedInstanceState); 
    mMapView.getMapAsync(this); //this is important 

    return v; 
} 

@Override 
public void onMapReady(GoogleMap googleMap) { 
    mGoogleMap = googleMap; 
    mGoogleMap.getUiSettings().setZoomControlsEnabled(true); 
    mGoogleMap.addMarker(new MarkerOptions().position(/*some location*/)); 
    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(/*some location*/, 10)); 
} 

@Override 
public void onResume() { 
    super.onResume(); 
    mMapView.onResume(); 
} 

@Override 
public void onPause() { 
    super.onPause(); 
    mMapView.onPause(); 
} 

@Override 
public void onDestroy() { 
    super.onDestroy(); 
    mMapView.onDestroy(); 
} 

@Override 
public void onSaveInstanceState(Bundle outState) { 
    super.onSaveInstanceState(outState); 
    mMapView.onSaveInstanceState(outState); 
} 

@Override 
public void onLowMemory() { 
    super.onLowMemory(); 
    mMapView.onLowMemory(); 
} 

Answer 3

Falls jemand sucht eine Kotlin Version von MapView Fragment zu implementieren hat;)

class MapViewKotlinFragment : Fragment(), OnMapReadyCallback { 

private var mMap: MapView? = null 

override fun onSaveInstanceState(outState: Bundle?) { 
    super.onSaveInstanceState(outState) 

    mMap?.onSaveInstanceState(outState) 
} 

override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? { 
    val view = inflater?.inflate(R.layout.fragment_map, container, false) 

    mMap = view?.findViewById(R.id.mapViewPlaces) as MapView 
    mMap?.onCreate(savedInstanceState) 
    mMap?.getMapAsync(this) 

    return view 
} 

override fun onResume() { 
    super.onResume() 
    mMap?.onResume() 
} 

override fun onPause() { 
    super.onPause() 
    mMap?.onPause() 
} 

override fun onStart() { 
    super.onStart() 
    mMap?.onStart() 
} 

override fun onStop() { 
    super.onStop() 
    mMap?.onStop() 
} 

override fun onDestroy() { 
    super.onDestroy() 
    mMap?.onDestroy() 
} 

override fun onLowMemory() { 
    super.onLowMemory() 
    mMap?.onLowMemory() 
} 

override fun onMapReady(googleMap: GoogleMap) { 
    googleMap.addMarker(MarkerOptions().position(LatLng(0.0, 0.0)).title("Marker")) 
}