SupportMapFragment 贴图在旋转时消失
SupportMapFragment map disappears on rotation
我正在使用基于地图的应用程序创建包含地图和 Web 视图的相册视图。该问题发生在轮换期间，并且在 com.android.support:support-v4:19.1 上运行良好，但在我更新到 22.2.0 后无法正常工作。
地图在初始视图中按预期显示，但旋转后，地图不再显示。我验证了 GoogleMap、容器视图（包含地图）和 SupportMapFragment 都是有效的。
在调试时，我决定检查 SupportMapFragment 的视图，看看是否可能是这个原因。旋转后，对 SupportMapFragment returns null 上的 getView() 调用（我怀疑这就是地图没有出现的原因，但我不明白为什么它最初有效但旋转后为 null）。
我很茫然，因为据我所知，我有一个有效的 SupportMapFragment、一个有效的 GoogleMap 和一个大小合适的容器视图（在本例中为 680x800）。正如我上面所说，在我使用 19.1 的先前版本中，此代码按预期工作。
以下是代码的相关片段：
SupportMapManager 创建在 EventReportAlbumActivity 中 class
public class EventReportAlbumActivity extends FragmentActivity
{
@Nullable protected SupportMapFragment m_mapFragment;
@NotNull
public SupportMapFragment getMapFragment ()
{
if( m_mapFragment == null )
{
GoogleMapOptions options = new GoogleMapOptions();
options.compassEnabled( false );
options.rotateGesturesEnabled( false );
options.scrollGesturesEnabled( false );
options.tiltGesturesEnabled( false );
options.zoomControlsEnabled( false );
options.zoomGesturesEnabled( false );
m_mapFragment = SupportMapFragment.newInstance( options );
m_mapFragment.setRetainInstance( true );
}
return m_mapFragment;
}
}
显示地图和网络视图的实际 Fragment 实例
public class EventAlbumItemFragment extends Fragment
{
@Nullable
protected SupportMapFragment m_mapFragment;
public static EventAlbumItemFragment newInstance ( )
{
final EventAlbumItemFragment fragment = new EventAlbumItemFragment();
fragment.setRetainInstance( true );
return fragment;
}
@Override
public View onCreateView ( @NotNull LayoutInflater inflater,
@NotNull ViewGroup container,
@Nullable Bundle savedInstanceState )
{
final View view = inflater.inflate( R.layout.event_album_item, container, false );
View mapContainer = view.findViewById( R.id.mapview_container );
// make map fragment view invisible until we configure it so the coordinates will be correct
mapContainer.setVisibility( View.INVISIBLE );
// other code removed for brevity...
}
/**
* Setter for the map fragment and its UI
*
* @param mapFragment The map fragment which should be added to this fragment's view, or null to remove the current fragment
*/
public void setMapFragment ( @Nullable SupportMapFragment mapFragment )
{
final FragmentManager fragmentManager = getChildFragmentManager();
if( m_mapFragment != null && m_mapFragment.isAdded() )
{
// Remove the existing map manager
fragmentManager.beginTransaction()
.remove( m_mapFragment )
.commit();
}
if( mapFragment != null )
{
// Add the map view to the current view
fragmentManager.beginTransaction()
.add( R.id.mapview_container, mapFragment, MAP_FRAGMENT_TAG )
.commit();
}
fragmentManager.executePendingTransactions();
m_mapFragment = mapFragment;
configureMap();
}
protected void configureMap ()
{
if ( m_mapFragment != null && m_eventMapFeature != null && m_eventMapFeature.haveValidLocation() == true )
{
final EventAlbumItemFragment localThis = this ;
m_mapFragment.getMapAsync( new OnMapReadyCallback()
{
@Override
public void onMapReady( GoogleMap googleMap )
{
final View mapContainer = getView().findViewById( R.id.mapview_container );
final int mapWidth = mapContainer.getWidth();
final int mapHeight = mapContainer.getHeight();
// we have our map and the coordinates should be correct. Make map visible and proceed
mapContainer.setVisibility( View.VISIBLE );
// This line below crashes because view is NULL after rotation.
// Left here to illustrate what I believe to be the root cause of the issue
// m_mapFragment.getView().setVisibility( View.VISIBLE );
// Remove all overlays from the map
googleMap.clear();
final DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
final float zoom = (float)GeoUtils.getZoomForMetersWide( MAP_MINIMUM_METER_SPAN,
mapWidth / displayMetrics.scaledDensity,
m_eventMapFeature.getCoordinate().latitude );
// Change the map bounds
CameraUpdate cameraUpdate;
// draw some items on the map
final LatLngBounds bounds = m_eventMapFeature.getBounds();
cameraUpdate = CameraUpdateFactory.newLatLngZoom( bounds.southwest, zoom );
googleMap.moveCamera( cameraUpdate );
}
} );
}
}
/** Assign the map fragment variable on resume. This is necessary for orientation change events */
@Override
public void onResume ()
{
super.onResume();
// If the map fragment hasn't been set, but this is the current item, get the map fragment from the parent
final EventReportAlbumActivity activity = (EventReportAlbumActivity)getActivity();
if( m_mapFragment == null && this == activity.getCurrentItemFragment() )
{
setMapFragment( activity.getMapFragment() );
}
//
configureMap();
}
}
更新：上面的 setMapFragment 在有多个页面时也会崩溃，并且用户在旋转后翻阅相册页面
经过更多的测试，当相册中有多个页面时，我也测试了这段代码。没有旋转，我可以毫无问题地滚动浏览相册。但是，如果我旋转设备并尝试滚动浏览相册，应用程序就会崩溃。同样，使用支持库的版本 19，此代码按预期工作。这仅在升级到版本 22 后才开始发生。
在 EventAlbumItemFragment 的方法 setMapFragment() 中：
fragmentManager.executePendingTransactions();
我得到以下堆栈跟踪：
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View.onClick(View.java:4020)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.view.View.onClick(View.java:4015)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.util.ArrayList.set(int, java.lang.Object)' on a null object reference
at android.support.v4.app.FragmentManagerImpl.makeInactive(FragmentManager.java:1192)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1099)
at android.support.v4.app.FragmentManagerImpl.removeFragment(FragmentManager.java:1235)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:710)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:490)
at crc.carsapp.fragments.MapAlbumItemFragment.setMapFragment(MapAlbumItemFragment.java:78)
at crc.carsapp.listeners.OnMapAlbumScrollListener.onPageSelected(OnMapAlbumScrollListener.java:46)
at crc.carsapp.listeners.OnEventAlbumViewScrollListener.onPageSelected(OnEventAlbumViewScrollListener.java:34)
at android.support.v4.view.ViewPager.dispatchOnPageSelected(ViewPager.java:1786)
at android.support.v4.view.ViewPager.scrollToItem(ViewPager.java:568)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:552)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:513)
at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:505)
at crc.carsapp.activities.AlbumActivity.scrollToPrevious(AlbumActivity.java:133)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.view.View.onClick(View.java:4015)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
所以，上面的代码有 2 个问题。首先（也是最关键的），Activity (EventReportAlbumActivity) 负责创建地图片段（及其相关片段保持对它的引用）。在旋转期间，activity（当然）被销毁并重新创建。因此，对 getMapFragment 的后续调用将生成一个新的 SupportMapFragment。同时，显示地图的片段仍然引用了先前的地图片段。
每当在 setMapFragment 中调用 remove 时，它都会引用旧的 SupportMapFragment 并因此引发异常。
这也导致地图在旋转后无法正常显示。
解决方法是删除 setMapFragment 中的删除调用（ViewPager 在 onPageSelected 中处理从上一页中删除的操作）并根据需要在 setMapFragment 中添加 'new' SupportMapFragment。
在升级到版本 22 之前原始代码是如何工作的是一个谜，因为无论支持版本如何，这似乎都是一个错误。而且，该解决方案仍然感觉不太正确，因为 SupportMapFragment 将其 setRetainInstance 设置为 true，这意味着我们希望它在片段的整个生命周期中都存在，但是 activity 在旋转期间重新创建它时最终会覆盖它。所以，如果有人有更优雅的解决方案，我很想听听。
相关更新代码如下：
public class EventAlbumItemFragment extends Fragment
{
public void setMapFragment ( @Nullable SupportMapFragment mapFragment )
{
final FragmentManager fragmentManager = getChildFragmentManager();
// The working assumption is that our map fragment, if already added, is added to
// our current fragment.
if ( mapFragment != null && mapFragment.isAdded() == false )
{
// Add the map view to the current view
fragmentManager.beginTransaction()
.add( R.id.mapview_container, mapFragment, MAP_FRAGMENT_TAG )
.commit() ;
fragmentManager.executePendingTransactions();
}
m_mapFragment = mapFragment;
configureMap();
}
@Override
public void onResume ()
{
super.onResume();
// We can get here in (at least) 3 different ways:
// 1. The first time this fragment is created.
// In this case, we will not have a local reference to a map fragment and will will add
// it if we are the currently displaying fragment.
// 2. After rotation
// Because the actual map fragment is maintained by our activity, the map fragment will
// have been recreated and our reference to it will no longer be valid.
// 3. After a pause event (such as the device going into power saving mode).
// We should still have a reference to the current map fragment and it should be
// valid. We can test that by checking if the map fragment is attached. This is done
// in the setMapFragment() method.
//
final AlbumActivity activity = (AlbumActivity)getActivity();
Fragment currentFragment = activity.getCurrentItemFragment() ;
if ( m_mapFragment == null && this == currentFragment )
{
setMapFragment( activity.getMapFragment() );
}
else if ( m_mapFragment != null )
{
setMapFragment( activity.getMapFragment() );
}
configureMap();
}
}
我正在使用基于地图的应用程序创建包含地图和 Web 视图的相册视图。该问题发生在轮换期间，并且在 com.android.support:support-v4:19.1 上运行良好，但在我更新到 22.2.0 后无法正常工作。
地图在初始视图中按预期显示，但旋转后，地图不再显示。我验证了 GoogleMap、容器视图（包含地图）和 SupportMapFragment 都是有效的。
在调试时，我决定检查 SupportMapFragment 的视图，看看是否可能是这个原因。旋转后，对 SupportMapFragment returns null 上的 getView() 调用（我怀疑这就是地图没有出现的原因，但我不明白为什么它最初有效但旋转后为 null）。
我很茫然，因为据我所知，我有一个有效的 SupportMapFragment、一个有效的 GoogleMap 和一个大小合适的容器视图（在本例中为 680x800）。正如我上面所说，在我使用 19.1 的先前版本中，此代码按预期工作。
以下是代码的相关片段：
SupportMapManager 创建在 EventReportAlbumActivity 中 class
public class EventReportAlbumActivity extends FragmentActivity
{
@Nullable protected SupportMapFragment m_mapFragment;
@NotNull
public SupportMapFragment getMapFragment ()
{
if( m_mapFragment == null )
{
GoogleMapOptions options = new GoogleMapOptions();
options.compassEnabled( false );
options.rotateGesturesEnabled( false );
options.scrollGesturesEnabled( false );
options.tiltGesturesEnabled( false );
options.zoomControlsEnabled( false );
options.zoomGesturesEnabled( false );
m_mapFragment = SupportMapFragment.newInstance( options );
m_mapFragment.setRetainInstance( true );
}
return m_mapFragment;
}
}
显示地图和网络视图的实际 Fragment 实例
public class EventAlbumItemFragment extends Fragment
{
@Nullable
protected SupportMapFragment m_mapFragment;
public static EventAlbumItemFragment newInstance ( )
{
final EventAlbumItemFragment fragment = new EventAlbumItemFragment();
fragment.setRetainInstance( true );
return fragment;
}
@Override
public View onCreateView ( @NotNull LayoutInflater inflater,
@NotNull ViewGroup container,
@Nullable Bundle savedInstanceState )
{
final View view = inflater.inflate( R.layout.event_album_item, container, false );
View mapContainer = view.findViewById( R.id.mapview_container );
// make map fragment view invisible until we configure it so the coordinates will be correct
mapContainer.setVisibility( View.INVISIBLE );
// other code removed for brevity...
}
/**
* Setter for the map fragment and its UI
*
* @param mapFragment The map fragment which should be added to this fragment's view, or null to remove the current fragment
*/
public void setMapFragment ( @Nullable SupportMapFragment mapFragment )
{
final FragmentManager fragmentManager = getChildFragmentManager();
if( m_mapFragment != null && m_mapFragment.isAdded() )
{
// Remove the existing map manager
fragmentManager.beginTransaction()
.remove( m_mapFragment )
.commit();
}
if( mapFragment != null )
{
// Add the map view to the current view
fragmentManager.beginTransaction()
.add( R.id.mapview_container, mapFragment, MAP_FRAGMENT_TAG )
.commit();
}
fragmentManager.executePendingTransactions();
m_mapFragment = mapFragment;
configureMap();
}
protected void configureMap ()
{
if ( m_mapFragment != null && m_eventMapFeature != null && m_eventMapFeature.haveValidLocation() == true )
{
final EventAlbumItemFragment localThis = this ;
m_mapFragment.getMapAsync( new OnMapReadyCallback()
{
@Override
public void onMapReady( GoogleMap googleMap )
{
final View mapContainer = getView().findViewById( R.id.mapview_container );
final int mapWidth = mapContainer.getWidth();
final int mapHeight = mapContainer.getHeight();
// we have our map and the coordinates should be correct. Make map visible and proceed
mapContainer.setVisibility( View.VISIBLE );
// This line below crashes because view is NULL after rotation.
// Left here to illustrate what I believe to be the root cause of the issue
// m_mapFragment.getView().setVisibility( View.VISIBLE );
// Remove all overlays from the map
googleMap.clear();
final DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
final float zoom = (float)GeoUtils.getZoomForMetersWide( MAP_MINIMUM_METER_SPAN,
mapWidth / displayMetrics.scaledDensity,
m_eventMapFeature.getCoordinate().latitude );
// Change the map bounds
CameraUpdate cameraUpdate;
// draw some items on the map
final LatLngBounds bounds = m_eventMapFeature.getBounds();
cameraUpdate = CameraUpdateFactory.newLatLngZoom( bounds.southwest, zoom );
googleMap.moveCamera( cameraUpdate );
}
} );
}
}
/** Assign the map fragment variable on resume. This is necessary for orientation change events */
@Override
public void onResume ()
{
super.onResume();
// If the map fragment hasn't been set, but this is the current item, get the map fragment from the parent
final EventReportAlbumActivity activity = (EventReportAlbumActivity)getActivity();
if( m_mapFragment == null && this == activity.getCurrentItemFragment() )
{
setMapFragment( activity.getMapFragment() );
}
//
configureMap();
}
}
更新：上面的 setMapFragment 在有多个页面时也会崩溃，并且用户在旋转后翻阅相册页面
经过更多的测试，当相册中有多个页面时，我也测试了这段代码。没有旋转，我可以毫无问题地滚动浏览相册。但是，如果我旋转设备并尝试滚动浏览相册，应用程序就会崩溃。同样，使用支持库的版本 19，此代码按预期工作。这仅在升级到版本 22 后才开始发生。
在 EventAlbumItemFragment 的方法 setMapFragment() 中：
fragmentManager.executePendingTransactions();
我得到以下堆栈跟踪：
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View.onClick(View.java:4020)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.view.View.onClick(View.java:4015)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.util.ArrayList.set(int, java.lang.Object)' on a null object reference
at android.support.v4.app.FragmentManagerImpl.makeInactive(FragmentManager.java:1192)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1099)
at android.support.v4.app.FragmentManagerImpl.removeFragment(FragmentManager.java:1235)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:710)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:490)
at crc.carsapp.fragments.MapAlbumItemFragment.setMapFragment(MapAlbumItemFragment.java:78)
at crc.carsapp.listeners.OnMapAlbumScrollListener.onPageSelected(OnMapAlbumScrollListener.java:46)
at crc.carsapp.listeners.OnEventAlbumViewScrollListener.onPageSelected(OnEventAlbumViewScrollListener.java:34)
at android.support.v4.view.ViewPager.dispatchOnPageSelected(ViewPager.java:1786)
at android.support.v4.view.ViewPager.scrollToItem(ViewPager.java:568)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:552)
at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:513)
at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:505)
at crc.carsapp.activities.AlbumActivity.scrollToPrevious(AlbumActivity.java:133)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.view.View.onClick(View.java:4015)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
所以，上面的代码有 2 个问题。首先（也是最关键的），Activity (EventReportAlbumActivity) 负责创建地图片段（及其相关片段保持对它的引用）。在旋转期间，activity（当然）被销毁并重新创建。因此，对 getMapFragment 的后续调用将生成一个新的 SupportMapFragment。同时，显示地图的片段仍然引用了先前的地图片段。
每当在 setMapFragment 中调用 remove 时，它都会引用旧的 SupportMapFragment 并因此引发异常。
这也导致地图在旋转后无法正常显示。
解决方法是删除 setMapFragment 中的删除调用（ViewPager 在 onPageSelected 中处理从上一页中删除的操作）并根据需要在 setMapFragment 中添加 'new' SupportMapFragment。
在升级到版本 22 之前原始代码是如何工作的是一个谜，因为无论支持版本如何，这似乎都是一个错误。而且，该解决方案仍然感觉不太正确，因为 SupportMapFragment 将其 setRetainInstance 设置为 true，这意味着我们希望它在片段的整个生命周期中都存在，但是 activity 在旋转期间重新创建它时最终会覆盖它。所以，如果有人有更优雅的解决方案，我很想听听。
相关更新代码如下：
public class EventAlbumItemFragment extends Fragment
{
public void setMapFragment ( @Nullable SupportMapFragment mapFragment )
{
final FragmentManager fragmentManager = getChildFragmentManager();
// The working assumption is that our map fragment, if already added, is added to
// our current fragment.
if ( mapFragment != null && mapFragment.isAdded() == false )
{
// Add the map view to the current view
fragmentManager.beginTransaction()
.add( R.id.mapview_container, mapFragment, MAP_FRAGMENT_TAG )
.commit() ;
fragmentManager.executePendingTransactions();
}
m_mapFragment = mapFragment;
configureMap();
}
@Override
public void onResume ()
{
super.onResume();
// We can get here in (at least) 3 different ways:
// 1. The first time this fragment is created.
// In this case, we will not have a local reference to a map fragment and will will add
// it if we are the currently displaying fragment.
// 2. After rotation
// Because the actual map fragment is maintained by our activity, the map fragment will
// have been recreated and our reference to it will no longer be valid.
// 3. After a pause event (such as the device going into power saving mode).
// We should still have a reference to the current map fragment and it should be
// valid. We can test that by checking if the map fragment is attached. This is done
// in the setMapFragment() method.
//
final AlbumActivity activity = (AlbumActivity)getActivity();
Fragment currentFragment = activity.getCurrentItemFragment() ;
if ( m_mapFragment == null && this == currentFragment )
{
setMapFragment( activity.getMapFragment() );
}
else if ( m_mapFragment != null )
{
setMapFragment( activity.getMapFragment() );
}
configureMap();
}
}