我有一个Maps Activity(SherlockFragmentActivity),它会加载到具有2个按钮的Maps Fragment中,并在显示2个不同的 fragment 之间进行切换(GoogleMapFragment和ScaleImageViewFragment)



当我单击“参展商 map ”按钮时,它将替换 fragment ,但是当我单击“返回”时,出现“java.lang.IllegalStateException: Activity 已被破坏”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, ViewGroup container,
                         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"));
    }
}
}

我已经将头撞墙了很长时间,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,然后我没有收到错误消息,但是我无法获得要设置制造商的 map ...这似乎是一种竞争情况

最佳答案

如果删除onDestroyView()中的所有嵌套 fragment ,则可以解决此问题:

public void onDestroyView()
{
        super.onDestroyView();
        Fragment fragment = (getFragmentManager().findFragmentById(R.id.map));
        FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
        ft.remove(fragment);
        ft.commit();
}

然后像往常一样在onCreateView()中对其进行充气:
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.map, container, false);
}

关于android - 切换 fragment -Google Map Fragment V2- Activity 已被破坏错误,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/15232493/

10-11 22:48
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