Android 通过重写onCreateView（）将SupportMapFragment放入另一个片段的方法

我将尝试描述我的情况：

我有

MyFragment扩展了Fragment

，覆盖了

onCreateView（）

在

MyFragment.java中

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.my_fragment, null);
        //some manipulation with view
        return view;

在
my_fragment.xml

<LinearLayout
       .....
  >
  <com.example.widgets.MyMapWidget
                   android:id="@+id/my_map"
                   android:layout_width="match_parent"
                   android:layout_height="300dp"
                   />
 </LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
             >
        <!-- Some another views-->
        <fragment xmlns:android="http://schemas.android.com/apk/res/android"
                  android:id="@+id/my_map_fragment"
                  android:layout_width="match_parent"
                  android:layout_height="match_parent"
                  class="com.google.android.gms.maps.SupportMapFragment"
       />
       <!-- Some another views-->
</LinearLayout>

在
widget_map.xml中

<LinearLayout
       .....
  >
  <com.example.widgets.MyMapWidget
                   android:id="@+id/my_map"
                   android:layout_width="match_parent"
                   android:layout_height="300dp"
                   />
 </LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
             >
        <!-- Some another views-->
        <fragment xmlns:android="http://schemas.android.com/apk/res/android"
                  android:id="@+id/my_map_fragment"
                  android:layout_width="match_parent"
                  android:layout_height="match_parent"
                  class="com.google.android.gms.maps.SupportMapFragment"
       />
       <!-- Some another views-->
</LinearLayout>

MyFragment.java
中的第78行（方法
onCreateView
）

从
myu fragment.xml
中删除
MyMapWidget
解决了问题。但我有一些问题：

为什么会这样
我可以这样展示地图吗
也许你知道另一种方式如何呈现自己的
片段的一部分

注意：我检查了类似问题的答案，但无法解决我的问题。
您可以将地图放在它自己的片段中，如下所示：

public class GoogleMapFragment extends MapFragment {

private static final String SUPPORT_MAP_BUNDLE_KEY = "MapOptions";

public GoogleMapFragment() {
    mCallback = null;
}

public static interface OnGoogleMapFragmentListener {
    void onMapReady(GoogleMap map);
}


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

public static GoogleMapFragment newInstance() {
    return new GoogleMapFragment();
}

public static GoogleMapFragment newInstance(GoogleMapOptions options) {
    Bundle arguments = new Bundle();
    arguments.putParcelable(SUPPORT_MAP_BUNDLE_KEY, options);

    GoogleMapFragment fragment = new GoogleMapFragment();
    fragment.setArguments(arguments);
    return fragment;
}

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    try {
        mCallback = (OnGoogleMapFragmentListener) getActivity();
    } catch (ClassCastException e) {
        throw new ClassCastException(getActivity().getClass().getName()
                + " must implement OnGoogleMapFragmentListener");
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View view = super.onCreateView(inflater, container, savedInstanceState);
    if (mCallback != null) {
        mCallback.onMapReady(getMap());
    }
    return view;
}

private OnGoogleMapFragmentListener mCallback;
}

 // create a new map
 mapsFragment = GoogleMapFragment.newInstance();

 // Then we add it using a FragmentTransaction.
 FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
 fragmentTransaction.replace(android.R.id.content, mapsFragment, FRAGMENT_MAP_TAG);
 fragmentTransaction.commit();

并将其添加到您的活动中，如下所示：

public class GoogleMapFragment extends MapFragment {

private static final String SUPPORT_MAP_BUNDLE_KEY = "MapOptions";

public GoogleMapFragment() {
    mCallback = null;
}

public static interface OnGoogleMapFragmentListener {
    void onMapReady(GoogleMap map);
}


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

public static GoogleMapFragment newInstance() {
    return new GoogleMapFragment();
}

public static GoogleMapFragment newInstance(GoogleMapOptions options) {
    Bundle arguments = new Bundle();
    arguments.putParcelable(SUPPORT_MAP_BUNDLE_KEY, options);

    GoogleMapFragment fragment = new GoogleMapFragment();
    fragment.setArguments(arguments);
    return fragment;
}

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    try {
        mCallback = (OnGoogleMapFragmentListener) getActivity();
    } catch (ClassCastException e) {
        throw new ClassCastException(getActivity().getClass().getName()
                + " must implement OnGoogleMapFragmentListener");
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View view = super.onCreateView(inflater, container, savedInstanceState);
    if (mCallback != null) {
        mCallback.onMapReady(getMap());
    }
    return view;
}

private OnGoogleMapFragmentListener mCallback;
}

 // create a new map
 mapsFragment = GoogleMapFragment.newInstance();

 // Then we add it using a FragmentTransaction.
 FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
 fragmentTransaction.replace(android.R.id.content, mapsFragment, FRAGMENT_MAP_TAG);
 fragmentTransaction.commit();

让您的活动实现OnGoogleMapFragmentListenerOnGoogleMapFragmentListener，然后在添加映射并准备就绪后，将调用以下方法：

@Override
public void onMapReady(GoogleMap map) {
       //add markers or whatever
}

希望这有助于您更好地控制mapfragment。
您可以将地图放在自己的片段中，如下所示：

public class GoogleMapFragment extends MapFragment {

private static final String SUPPORT_MAP_BUNDLE_KEY = "MapOptions";

public GoogleMapFragment() {
    mCallback = null;
}

public static interface OnGoogleMapFragmentListener {
    void onMapReady(GoogleMap map);
}


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

public static GoogleMapFragment newInstance() {
    return new GoogleMapFragment();
}

public static GoogleMapFragment newInstance(GoogleMapOptions options) {
    Bundle arguments = new Bundle();
    arguments.putParcelable(SUPPORT_MAP_BUNDLE_KEY, options);

    GoogleMapFragment fragment = new GoogleMapFragment();
    fragment.setArguments(arguments);
    return fragment;
}

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    try {
        mCallback = (OnGoogleMapFragmentListener) getActivity();
    } catch (ClassCastException e) {
        throw new ClassCastException(getActivity().getClass().getName()
                + " must implement OnGoogleMapFragmentListener");
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View view = super.onCreateView(inflater, container, savedInstanceState);
    if (mCallback != null) {
        mCallback.onMapReady(getMap());
    }
    return view;
}

private OnGoogleMapFragmentListener mCallback;
}

 // create a new map
 mapsFragment = GoogleMapFragment.newInstance();

 // Then we add it using a FragmentTransaction.
 FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
 fragmentTransaction.replace(android.R.id.content, mapsFragment, FRAGMENT_MAP_TAG);
 fragmentTransaction.commit();

并将其添加到您的活动中，如下所示：

public class GoogleMapFragment extends MapFragment {

private static final String SUPPORT_MAP_BUNDLE_KEY = "MapOptions";

public GoogleMapFragment() {
    mCallback = null;
}

public static interface OnGoogleMapFragmentListener {
    void onMapReady(GoogleMap map);
}


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

public static GoogleMapFragment newInstance() {
    return new GoogleMapFragment();
}

public static GoogleMapFragment newInstance(GoogleMapOptions options) {
    Bundle arguments = new Bundle();
    arguments.putParcelable(SUPPORT_MAP_BUNDLE_KEY, options);

    GoogleMapFragment fragment = new GoogleMapFragment();
    fragment.setArguments(arguments);
    return fragment;
}

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    try {
        mCallback = (OnGoogleMapFragmentListener) getActivity();
    } catch (ClassCastException e) {
        throw new ClassCastException(getActivity().getClass().getName()
                + " must implement OnGoogleMapFragmentListener");
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View view = super.onCreateView(inflater, container, savedInstanceState);
    if (mCallback != null) {
        mCallback.onMapReady(getMap());
    }
    return view;
}

private OnGoogleMapFragmentListener mCallback;
}

 // create a new map
 mapsFragment = GoogleMapFragment.newInstance();

 // Then we add it using a FragmentTransaction.
 FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
 fragmentTransaction.replace(android.R.id.content, mapsFragment, FRAGMENT_MAP_TAG);
 fragmentTransaction.commit();

让您的活动实现OnGoogleMapFragmentListenerOnGoogleMapFragmentListener，然后在添加映射并准备就绪后，将调用以下方法：

@Override
public void onMapReady(GoogleMap map) {
       //add markers or whatever
}

希望这有助于您更好地控制mapfragment。
我记得不久前遇到过类似的问题。对我来说，有效的方法是在fragment
onCreateView
方法中以编程方式创建映射。差不多-

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = super.onCreateView(inflater, container, savedInstanceState, R.layout.fragment_layout);
    setupMap(); 
    return view;
}

private void setupMap() {
    mapFragment = new SupportMapFragment();
    ParentActivity activity = getParentActivity();
    if (activity != null) {
        FragmentTransaction fragmentTransaction = activity.getSupportFragmentManager().beginTransaction();
        fragmentTransaction.add(R.id.wrapperMapPlaces, mapFragment);
        fragmentTransaction.commit();
    }
}

我记得不久前我也遇到过类似的问题。对我有效的是通过编程方式在fragment
onCreateView
方法中创建映射。差不多-

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = super.onCreateView(inflater, container, savedInstanceState, R.layout.fragment_layout);
    setupMap(); 
    return view;
}

private void setupMap() {
    mapFragment = new SupportMapFragment();
    ParentActivity activity = getParentActivity();
    if (activity != null) {
        FragmentTransaction fragmentTransaction = activity.getSupportFragmentManager().beginTransaction();
        fragmentTransaction.add(R.id.wrapperMapPlaces, mapFragment);
        fragmentTransaction.commit();
    }
}

我找到了方法，如何解决它：

检测
MyFragment
破坏其视图的事件（
onDestroyView
）
在这个方法中，获取
MyMapWidget
的实例并调用
destromap
myMapWidget.destroyMap
将是：

公共地图（碎片管理器fm）{
fm.beginTransaction（）.remove（mMapFragment.commit（）；

}

当父片段解压视图时，只需使用map删除片段即可。
我找到了方法，如何解决它：

检测
MyFragment
破坏其视图的事件（
onDestroyView
）
在这个方法中，获取
MyMapWidget
的实例并调用
destromap
myMapWidget.destroyMap
将是：

公共地图（碎片管理器fm）{
fm.beginTransaction（）.remove（mMapFragment.commit（）；

}

当父片段解压视图时，只需使用map移除片段