我有一个地图活动(SherlockFragmentActivity)加载到地图片段中,该片段在显示2个不同片段之间有2个按钮和切换(GoogleMapFragment& Scale
ImageViewFragment)
当我点击“展商地图”按钮时,它会替换片段,但是当我点击后,我得到一个“java.lang.IllegalStateException：Activity已被销毁”错误
ERROR/AndroidRuntime(5768): FATAL EXCEPTION: main
java.lang.IllegalStateException: Activity has been destroyed
at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1342)
at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:595)
at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:574)
at com.takeit2eleven.towniemeeting.android.fragments.GoogleMapFragment.onCreateView(GoogleMapFragment.java:42)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:429)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
这是我的MapsFragment.java文件：
public class MapsFragment extends SherlockFragment {
Button mHotelMapButton;
Button mExhibitorButton;
GoogleMapFragment mGoogleMapFragment;
ScaleImageViewFragment mScaleImageViewFragment;
static boolean mShowingGoogleMap = true;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
mShowingGoogleMap = savedInstanceState.getBoolean("showingGoogleMap");
}
mGoogleMapFragment = new GoogleMapFragment();
mScaleImageViewFragment = new ScaleImageViewFragment();
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean("showingGoogleMap",mShowingGoogleMap);
}
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.maps_fragment,null);
mHotelMapButton = (Button) view.findViewById(R.id.hotel_button);
mExhibitorButton = (Button) view.findViewById(R.id.exhititor_map_button);
mExhibitorButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mShowingGoogleMap = false;
showExhibitorFragment();
}
});
mHotelMapButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mShowingGoogleMap = true;
showGoogleMapFragment();
}
});
return view;
}
@Override
public void onPause() {
super.onPause();
getChildFragmentManager().beginTransaction()
.remove(mGoogleMapFragment)
.remove(mScaleImageViewFragment).commit();
}
@Override
public void onResume() {
super.onResume();
if(mShowingGoogleMap){
showGoogleMapFragment();
}else{
showExhibitorFragment();
}
}
private void showExhibitorFragment(){
getChildFragmentManager().beginTransaction()
.remove(mGoogleMapFragment)
.remove(mScaleImageViewFragment)
.replace(R.id.fragment_placeholder,mScaleImageViewFragment,"scaleImage")
.commit();
}
private void showGoogleMapFragment(){
getChildFragmentManager().beginTransaction()
.remove(mGoogleMapFragment)
.remove(mScaleImageViewFragment)
.replace(R.id.fragment_placeholder,mGoogleMapFragment,"mapFragment")
.commit();
}
}
和我的GoogleMapFragment.java文件：
public class GoogleMapFragment extends Fragment {
private SupportMapFragment mMapFragment;
private GoogleMap mMap;
private final LatLng PLANET_HOLLYWOOD = new LatLng(36.1100,-115.1710);
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
GoogleMapOptions mapOptions = new GoogleMapOptions();
mapOptions.compassEnabled(true).camera(new CameraPosition(PLANET_HOLLYWOOD,13,0f,0f));
mMapFragment = SupportMapFragment.newInstance(mapOptions);
}
@Override
public View onCreateView(LayoutInflater inflater,Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View view = inflater.inflate(R.layout.google_map,container,false);
getChildFragmentManager()
.beginTransaction()
.add(R.id.map_holder,mMapFragment)
.commit();
return view;
}
@Override
public void onPause() {
super.onPause();
getChildFragmentManager().beginTransaction()
.remove(mMapFragment)
.commit();
}
@Override
public void onResume() {
super.onResume();
mMap = mMapFragment.getMap();
if(mMap != null){
mMap.addMarker(new MarkerOptions().position(PLANET_HOLLYWOOD).title("Planet Hollywood"));
}
}
}
我已经把头撞在墙上了很长一段时间,试图弄清楚这个错误,以及如何避免/修复它.
更新：
顺便说一句,如果我切换到：
getActivity().getSupportFragmentManager()
.beginTransaction()
.add(R.id.map_holder,mMapFragment)
.commit();
在GoogleMapFragment中,我不会收到错误,但是我无法抓住地图来设置制造商…它似乎是一个竞争条件
解决方法
如果您删除onDestroyView()中的所有嵌套片段,您可以修复此问题：
public void onDestroyView()
{
super.onDestroyView();
Fragment fragment = (getFragmentManager().findFragmentById(R.id.map));
FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
ft.remove(fragment);
ft.commit();
}
并像往常一样在onCreateView()中充气：
public View onCreateView(LayoutInflater inflater,Bundle savedInstanceState) {
return inflater.inflate(R.layout.map,false);
}
