无法将SupportMapFragment添加到FrameLayout

Question

我已经在活动的onCreate中将mapFragment添加到FrameLayout中

getSupportFragmentManager().beginTransaction()
                .replace(R.id.frame_container,//where frame_container is a FrameLayout
                 new MapyFragment(),
                 MapyFragment.class.getSimpleName()).commit();

并且frame_container是一个FrameLayout

MapyFragment.class

public class MapyFragment extends Fragment {

    private SupportMapFragment supportMapFragment;
    private GoogleMap map;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        setRetainInstance(true);
        setHasOptionsMenu(true);

        super.onCreate(savedInstanceState);
    }

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

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

        FragmentManager fm = getChildFragmentManager();/// getActivity().getSupportFragmentManager();/// getChildFragmentManager();
        supportMapFragment = (SupportMapFragment) fm.findFragmentById(R.id.map_container);
        if (supportMapFragment == null) {
            supportMapFragment = SupportMapFragment.newInstance();
            fm.beginTransaction().replace(R.id.map_container, supportMapFragment).commit();
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        if (supportMapFragment != null) {
            supportMapFragment.getMapAsync(new OnMapReadyCallback() {

                @Override
                public void onMapReady(GoogleMap googleMap) {
                    map = googleMap;
                    map.animateCamera(CameraUpdateFactory.zoomTo(15));
                }
            });
        }
    }
}

我尝试使用getChildFragmentManager和getActivity.getSupportFragmentManager（）进行更改。

Google地图不显示。 没有崩溃，我在做什么错。 请澄清并

以及为什么我们必须使用fragmentManger来获取我们的map_container。 看到

fm.findFragmentById(R.id.map_container);

fragment_mapy.xml

<fragment
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:map="http://schemas.android.com/apk/res-auto"
        android:id="@+id/map_container"
        class="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="40dp"
        map:uiZoomControls="true" />

Answer 1

尝试这个：

在onCreateview初始化您的supportMapFragment 。

 @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    super.onCreateView(inflater, container, savedInstanceState);
    View rootView = inflater.inflate(R.layout.activity_map, container, false);
    smp = (SupportMapFragment) this.getChildFragmentManager().findFragmentById(R.id.map);
    smp.getMapAsync(this);
    retrun rootView;
}

@Override
public void onMapReady(GoogleMap map) {
    mMap = map;
}

在布局xml中：

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

在这里也了解有关SupportMapFragment的信息

Answer 2

解决我自己的问题

首先， b / w android:name和android:class都可以正常工作。 看到这个

getChildFragmentManager（）是元凶。

最新工人阶级

public class MapyFragment extends Fragment implements OnMapReadyCallback {

    private SupportMapFragment supportMapFragment;
    private GoogleMap map;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        setRetainInstance(true);
        setHasOptionsMenu(true);
        super.onCreate(savedInstanceState);
    }

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

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

        FragmentManager fm = getActivity().getSupportFragmentManager();/// getChildFragmentManager();
        supportMapFragment = (SupportMapFragment) fm.findFragmentById(R.id.map_container);
        if (supportMapFragment == null) {
            supportMapFragment = SupportMapFragment.newInstance();
            fm.beginTransaction().replace(R.id.map_container, supportMapFragment).commit();
        }
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        map = googleMap;
        map.animateCamera(CameraUpdateFactory.zoomTo(15));
    }
}