让MapFragment在AlertDialog中工作

Question

我想在AlertDialog中显示一个MapFragment。

在阅读了以下问题后，我问了这个问题[括号之间的观察结果是我的结果，有人可能已经让他们工作了，但我不是一个否认我把事情搞砸的惊人天赋的人]:

• http://www.stackoverflow.com/questions/14659705/android-maps-api-v2-in-dialog[不工作:地图对象未实例化]
• http://www.stackoverflow.com/questions/13733299/initialize-mapfragment-programmatically-with-maps-api-v2[不工作:静态方法在非静态类中的问题]

尝试其中任何一个，或者临时将两者结合起来，都会导致IllegalArgument或NullPointer异常。有时我会抱怨无法在扩展的MapFragment中找到与ID相关的视图。

目前我得到的相关代码:

public class PropDetailActivity extends Activity
{
    static final int PICK_REQUEST = 70003;
    private static final int TABLE_PROP_TYPES = 13,
        ADD_ID = Menu.FIRST + 1,
        DELETE_ID = Menu.FIRST + 3;                 
    Button btnLocation;
    private LocationManager daLocationManager;
    private String daProvider;
    private double daCurrentLat, daCurrentLong;
    @Override
    public void onCreate(Bundle savedInstanceState)
    {   
        super.onCreate(savedInstanceState);
        setContentView(R.layout.prop_detail);
        btnLocation = (Button) findViewById(R.id.btnLocation);
        btnLocation.setOnClickListener(new OnClickListener()
        {           
            @Override
            public void onClick(View v)
            {
                openGps();
            }
        });
        doMapGubbinz();
    }
    private void openGps()
    {
        LayoutInflater inflater = LayoutInflater.from(this);
        LatLng here = new LatLng(daCurrentLat, daCurrentLong);
        MapFragment fragment = PreparedMapFragment.newInstance(here);
        FragmentTransaction transaction = getFragmentManager().beginTransaction();
        transaction.add(R.id.mapView, fragment)
            .commit();
        //daMap = fragment.getMap();
        View gps = inflater.inflate(R.layout.location_gps, null);
        new AlertDialog.Builder(this)
            .setTitle("Property location")
            .setView(gps)
            .show();
//      Marker currentLoc = daMap.addMarker(new MarkerOptions().position(here).title("Ubicación actual"));
//      
//      daMap.moveCamera(CameraUpdateFactory.newLatLngZoom(here, 15));
//      
//      daMap.animateCamera(CameraUpdateFactory.zoomTo(15), 2000, null);
    }
    public void doMapGubbinz()
    {
        daLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        Criteria criteria = new Criteria();
        daProvider = daLocationManager.getBestProvider(criteria, false);
        daLocationManager.requestLocationUpdates(daProvider, 400, 1, this);
        Location location = daLocationManager.getLastKnownLocation(daProvider);     
        if (location != null) 
        {
            System.out.println("Provider " + daProvider + " has been selected.");
            onLocationChanged(location);
        } 
        daCurrentLat = location.getLatitude();
        daCurrentLong = location.getLongitude();
    }
    static public class PreparedMapFragment extends MapFragment
    {
        static MapFragment frag;
        public PreparedMapFragment() 
        {
            super();
        }
        public static MapFragment newInstance(LatLng pos)
        {
            frag = new MapFragment();
            UiSettings settings = frag.getMap().getUiSettings();
            settings.setAllGesturesEnabled(false);
            settings.setMyLocationButtonEnabled(false);
            frag.getMap().moveCamera(CameraUpdateFactory.newLatLngZoom(pos, 16));
            frag.getMap().addMarker(new MarkerOptions().position(pos).title("Ubicación actual"));
            frag.getMap().animateCamera(CameraUpdateFactory.zoomTo(15), 2000, null);
            return frag;
        }
//      @Override
//      public View onCreateView(LayoutInflater arg0, ViewGroup arg1, Bundle arg2)
//      {
//          View v = super.onCreateView(arg0, arg1, arg2);
//          initMap();
//          return v;
//      }
//
//      private void initMap()
//      {
//          UiSettings settings = getMap().getUiSettings();
//          
//          settings.setAllGesturesEnabled(false);
//          settings.setMyLocationButtonEnabled(false);
//          
//          getMap().moveCamera(CameraUpdateFactory.newLatLngZoom(daCurrentPos, 16));
//          
//          getMap().addMarker(new MarkerOptions().position(daCurrentPos).title("Ubicación actual"));
//
//          getMap().animateCamera(CameraUpdateFactory.zoomTo(15), 2000, null);
//      }
    }
}

Answer 1

你可以在一个对话框中显示一个地图片段

public class DialogMapFragment extends DialogFragment {
    private SupportMapFragment fragment;
    public DialogMapFragment() {
        fragment = new SupportMapFragment();
    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.mapdialog, container, false);
        getDialog().setTitle("");
        FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
        transaction.add(R.id.mapView, fragment).commit();
        return view;
    }

    public SupportMapFragment getFragment() {
        return fragment;
    }
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="0dp" >
    <FrameLayout
        android:id="@+id/mapView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </FrameLayout>
</RelativeLayout>`

通过new DialogMapFragment().show(getFragmentManager()，"tag")显示对话框;你可以用任何你需要的按钮来定制对话片段