Android – 切换碎片 – Google Map Fragment V2 – 活动已被破坏

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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

  1. ERROR/AndroidRuntime(5768): FATAL EXCEPTION: main
  2.     java.lang.IllegalStateException: Activity has been destroyed
  3.     at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1342)
  4.     at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:595)
  5.     at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:574)
  6.     at com.takeit2eleven.towniemeeting.android.fragments.GoogleMapFragment.onCreateView(GoogleMapFragment.java:42)
  7.     at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460)
  8.     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911)
  9.     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
  10.     at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
  11.     at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
  12.     at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:429)
  13.     at android.os.Handler.handleCallback(Handler.java:615)
  14.     at android.os.Handler.dispatchMessage(Handler.java:92)
  15.     at android.os.Looper.loop(Looper.java:137)
  16.     at android.app.ActivityThread.main(ActivityThread.java:4745)
  17.     at java.lang.reflect.Method.invokeNative(Native Method)
  18.     at java.lang.reflect.Method.invoke(Method.java:511)
  19.     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
  20.     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
  21.     at dalvik.system.NativeStart.main(Native Method)

这是我的MapsFragment.java文件：

  1. public class MapsFragment extends SherlockFragment {
  2.  
  3. Button mHotelMapButton;
  4. Button mExhibitorButton;
  5. GoogleMapFragment mGoogleMapFragment;
  6. ScaleImageViewFragment mScaleImageViewFragment;
  7. static boolean mShowingGoogleMap = true;
  8.  
  9.  
  10. @Override
  11. public void onCreate(Bundle savedInstanceState) {
  12.     super.onCreate(savedInstanceState);
  13.     if (savedInstanceState != null) {
  14.         mShowingGoogleMap = savedInstanceState.getBoolean("showingGoogleMap");
  15.     }
  16.  
  17.     mGoogleMapFragment = new GoogleMapFragment();
  18.     mScaleImageViewFragment = new ScaleImageViewFragment();
  19.  
  20. }
  21.  
  22. @Override
  23. public void onSaveInstanceState(Bundle outState) {
  24.     super.onSaveInstanceState(outState);
  25.     outState.putBoolean("showingGoogleMap",mShowingGoogleMap);
  26.  
  27. }
  28.  
  29. @Override
  30. public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
  31.  
  32.     View view = inflater.inflate(R.layout.maps_fragment,null);
  33.     mHotelMapButton = (Button) view.findViewById(R.id.hotel_button);
  34.     mExhibitorButton = (Button) view.findViewById(R.id.exhititor_map_button);
  35.  
  36.     mExhibitorButton.setOnClickListener(new View.OnClickListener() {
  37.         @Override
  38.         public void onClick(View v) {
  39.             mShowingGoogleMap = false;
  40.             showExhibitorFragment();
  41.         }
  42.     });
  43.  
  44.     mHotelMapButton.setOnClickListener(new View.OnClickListener() {
  45.         @Override
  46.         public void onClick(View v) {
  47.             mShowingGoogleMap = true;
  48.             showGoogleMapFragment();
  49.         }
  50.     });
  51.  
  52.     return view;
  53.  
  54. }
  55.  
  56. @Override
  57. public void onPause() {
  58.     super.onPause();
  59.     getChildFragmentManager().beginTransaction()
  60.             .remove(mGoogleMapFragment)
  61.             .remove(mScaleImageViewFragment).commit();
  62. }
  63.  
  64. @Override
  65. public void onResume() {
  66.     super.onResume();
  67.  
  68.  
  69.     if(mShowingGoogleMap){
  70.         showGoogleMapFragment();
  71.  
  72.     }else{
  73.         showExhibitorFragment();
  74.     }
  75. }
  76.  
  77. private void showExhibitorFragment(){
  78.     getChildFragmentManager().beginTransaction()
  79.             .remove(mGoogleMapFragment)
  80.             .remove(mScaleImageViewFragment)
  81.             .replace(R.id.fragment_placeholder,mScaleImageViewFragment,"scaleImage")
  82.             .commit();
  83. }
  84. private void showGoogleMapFragment(){
  85.     getChildFragmentManager().beginTransaction()
  86.             .remove(mGoogleMapFragment)
  87.             .remove(mScaleImageViewFragment)
  88.             .replace(R.id.fragment_placeholder,mGoogleMapFragment,"mapFragment")
  89.             .commit();
  90. }
  91. }

和我的GoogleMapFragment.java文件：

  1. public class GoogleMapFragment extends Fragment {
  2. private SupportMapFragment mMapFragment;
  3. private GoogleMap mMap;
  4. private final LatLng PLANET_HOLLYWOOD = new LatLng(36.1100,-115.1710);
  5.  
  6. @Override
  7. public void onCreate(Bundle savedInstanceState) {
  8.     super.onCreate(savedInstanceState);
  9.     GoogleMapOptions mapOptions = new GoogleMapOptions();
  10.     mapOptions.compassEnabled(true).camera(new CameraPosition(PLANET_HOLLYWOOD,13,0f,0f));
  11.     mMapFragment = SupportMapFragment.newInstance(mapOptions);
  12. }
  13.  
  14. @Override
  15. public View onCreateView(LayoutInflater inflater,Bundle savedInstanceState) {
  16.     super.onCreate(savedInstanceState);
  17.  
  18.     View view = inflater.inflate(R.layout.google_map,container,false);
  19.  
  20.     getChildFragmentManager()
  21.             .beginTransaction()
  22.             .add(R.id.map_holder,mMapFragment)
  23.             .commit();
  24.  
  25.     return view;
  26.  
  27. }
  28.  
  29. @Override
  30. public void onPause() {
  31.     super.onPause();
  32.     getChildFragmentManager().beginTransaction()
  33.             .remove(mMapFragment)
  34.             .commit();
  35. }
  36.  
  37.  
  38. @Override
  39. public void onResume() {
  40.     super.onResume();
  41.  
  42.     mMap = mMapFragment.getMap();
  43.     if(mMap != null){
  44.         mMap.addMarker(new MarkerOptions().position(PLANET_HOLLYWOOD).title("Planet Hollywood"));
  45.     }
  46. }
  47. }

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：

  1. getActivity().getSupportFragmentManager()
  2.             .beginTransaction()
  3.             .add(R.id.map_holder,mMapFragment)
  4.             .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： 
  1. public void onDestroyView() 
  2. {
  3.         super.onDestroyView(); 
  4.         Fragment fragment = (getFragmentManager().findFragmentById(R.id.map));  
  5.         FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
  6.         ft.remove(fragment);
  7.         ft.commit();
  8. }

并像往常一样在onCreateView()中充气：

  1. public View onCreateView(LayoutInflater inflater,Bundle savedInstanceState) {
  2.     return inflater.inflate(R.layout.map,false);
  3. }

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