MapSupportFragment - IllegalStateException - No Host

Question

J'utilise SupportMapFragment de cette façon.

Mon activité extends FragmentActivity

Dans onCreate

((SupportMapFragment) getSupportFragmentManager().findFragmentById(
      R.id.locationMap)).getMapAsync(this); 

onMapReady

@Override 
public void onMapReady(GoogleMap locationMap) { 
    this.locationMap = locationMap; 
    UiSettings mapSettings = locationMap.getUiSettings(); 
    locationMap.setTrafficEnabled(true); 
    mapSettings.setAllGesturesEnabled(true); 
    mapSettings.setCompassEnabled(true); 
    mapSettings.setMyLocationButtonEnabled(true); 
    mapSettings.setRotateGesturesEnabled(true); 
    mapSettings.setScrollGesturesEnabled(true); 
    mapSettings.setTiltGesturesEnabled(false); 
    mapSettings.setZoomControlsEnabled(true); 
    mapSettings.setZoomGesturesEnabled(true); 
    locationMap.animateCamera(CameraUpdateFactory.zoomTo(17), 2000, null); 
    locationMap.setMyLocationEnabled(true); 
} 

Maintenant, quand je quitte l'application, et rechargez-je obtenir

java.lang.RuntimeException: Unable to pause activity {com.mcruiseon.hindjewadipune.caregiri/com.mcruiseon.caregiri.Home}: java.lang.IllegalStateException: No host 
1 at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2358) 
2 at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2315) 
3 at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:2295) 
4 at android.app.ActivityThread.access$1700(ActivityThread.java:117) 
5 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:946) 
6 at android.os.Handler.dispatchMessage(Handler.java:99) 
7 at android.os.Looper.loop(Looper.java:130) 
8 at android.app.ActivityThread.main(ActivityThread.java:3687) 
9 at java.lang.reflect.Method.invokeNative(Native Method) 
10 at java.lang.reflect.Method.invoke(Method.java:507) 
11 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 
12 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 
13 at dalvik.system.NativeStart.main(Native Method) 
14 Caused by: java.lang.IllegalStateException: No host 
15 at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1235) 
16 at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1230) 
17 at android.support.v4.app.FragmentManagerImpl.dispatchPause(FragmentManager.java:2056) 
18 at android.support.v4.app.FragmentController.dispatchPause(FragmentController.java:198) 
19 at android.support.v4.app.FragmentActivity.onPause(FragmentActivity.java:401) 
20 at com.mcruiseon.caregiri.Home.onPause(Home.java:635) 
21 at android.app.Activity.performPause(Activity.java:3862) 
22 at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1191) 
23 at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2345) 
24 ... 12 more 
25 java.lang.IllegalStateException: No host 
26 at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1235) 
27 at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1230) 
28 at android.support.v4.app.FragmentManagerImpl.dispatchPause(FragmentManager.java:2056) 
29 at android.support.v4.app.FragmentController.dispatchPause(FragmentController.java:198) 
30 at android.support.v4.app.FragmentActivity.onPause(FragmentActivity.java:401) 
31 at com.mcruiseon.caregiri.Home.onPause(Home.java:635) 
32 at android.app.Activity.performPause(Activity.java:3862) 
33 at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1191) 
34 at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2345) 
35 at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2315) 
36 at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:2295) 
37 at android.app.ActivityThread.access$1700(ActivityThread.java:117) 
38 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:946) 
39 at android.os.Handler.dispatchMessage(Handler.java:99) 
40 at android.os.Looper.loop(Looper.java:130) 
41 at android.app.ActivityThread.main(ActivityThread.java:3687) 
42 at java.lang.reflect.Method.invokeNative(Native Method) 
43 at java.lang.reflect.Method.invoke(Method.java:507) 
44 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 
45 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 
46 at dalvik.system.NativeStart.main(Native Method) 

Modifier

La plupart des réponses parlent onBackStack, mais je ne se soucient pas du tout. Par exemple this Certains ont des réponses énigmatiques this

Answer 1

Depuis que je suis la sortie de l'application en appuyant sur le bouton de retour, je reçois une exception « Non hôte ». Je déplace le code ci-dessous de onCreate à onResume

((SupportMapFragment) getSupportFragmentManager().findFragmentById(
      R.id.locationMap)).getMapAsync(this);