Question

我有一些使用FragmentPagerAdapter创建的标签，并且使用此适配器我使用getItem方法获取“标签碎片”：

 @Override
    public Fragment getItem(int position) {
        switch (position) {
            case 0:
                return new MapsFragment();
            case 1:
                return new GroupsFragment();
            case 2:
                return new InfosFragment();
        }
        return null;
    }

现在我想在我的1. Tab上实现一个MapFragment我已经有了这个：

public class MapsFragment extends Fragment implements OnMapReadyCallback {

private MapFragment mapFragment;

public static MapsFragment newInstance() {
    MapsFragment fragment = new MapsFragment();
    return fragment;
}

public MapsFragment() {
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_maps, container, false);
}

@Override
public void onMapReady(GoogleMap googleMap) {
    LatLng augsburg = new LatLng(48.348527, 10.915952);

    googleMap.setMyLocationEnabled(true);
    googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(augsburg, 13));

    googleMap.addMarker(new MarkerOptions()
            .title("Augsburg Zoo")
            .snippet("Der coolste Zoo der Welt")
            .position(augsburg));
}

}

但是我在这一行上遇到了一个不兼容的类型错误：

MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map); 但我不知道如何修复它以及如何编写比这更好的代码！

Answer 1

您可能正在使用SupportMapFragment。

将onCreate（）更改为

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

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


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                     Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_maps, container, false);
    SupportMapFragment mapFragment = (SupportMapFragment) getFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
    return view;

}

如何在Tab的片段中实现MapFragment

1 个答案: