非法状态异常：地图大小不应为0。

Question

非法状态异常：地图大小不应为0。

androidgoogle-mapsgoogle-maps-android-api-2

7

我有一个显示地图的MapFragment。

如果用户离开活动（或设备进入睡眠状态）时仍然在使用地图，那么当用户回来时，onResume会被调用，我会将地图移回到一个标记处。

但是当我移动相机时，会出现异常。

07-23 16:28:42.725: E/AndroidRuntime(19095): java.lang.RuntimeException: Unable to resume activity {ecm2.android/ecm2.android.EMGNoteMapActivity}: java.lang.IllegalStateException: Map size should not be 0. Most likely, layout has not yet occured for the map view.
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2742)
 07-23 16:28:42.725: E/AndroidRuntime(19095):   at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2771)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2235)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.app.ActivityThread.access$600(ActivityThread.java:141)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.os.Handler.dispatchMessage(Handler.java:99)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.os.Looper.loop(Looper.java:137)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.app.ActivityThread.main(ActivityThread.java:5041)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at java.lang.reflect.Method.invokeNative(Native Method)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at java.lang.reflect.Method.invoke(Method.java:511)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at dalvik.system.NativeStart.main(Native Method)
07-23 16:28:42.725: E/AndroidRuntime(19095): Caused by: java.lang.IllegalStateException: Map size should not be 0. Most likely, layout has not yet occured for the map view.
07-23 16:28:42.725: E/AndroidRuntime(19095):    at maps.as.i.b(Unknown Source)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at maps.ah.w.a(Unknown Source)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at maps.ah.s.a(Unknown Source)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at maps.ah.an.b(Unknown Source)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at bgc.onTransact(SourceFile:92)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.os.Binder.transact(Binder.java:310)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at com.google.android.gms.maps.internal.IGoogleMapDelegate$a$a.animateCamera(Unknown Source)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at com.google.android.gms.maps.GoogleMap.animateCamera(Unknown Source)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at ecm2.android.Fragments.EMGMap.centerOnNote(EMGMap.java:340)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at ecm2.android.Fragments.EMGMap.fetchMapSettings(EMGMap.java:283)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at ecm2.android.Fragments.EMGMap.onResume(EMGMap.java:289)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:917)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1080)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.support.v4.app.FragmentManagerImpl.dispatchResume(FragmentManager.java:1820)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.support.v4.app.FragmentActivity.onPostResume(FragmentActivity.java:412)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at android.app.Activity.performResume(Activity.java:5195)
07-23 16:28:42.725: E/AndroidRuntime(19095):    at     android.app.ActivityThread.performResumeActivity(ActivityThread.java:2732)
07-23 16:28:42.725: E/AndroidRuntime(19095):    ... 12 more

这是我在onResume中相机移动的代码。

if(map != null && northEast != null && southWest != null){
        map.animateCamera(CameraUpdateFactory.newLatLngBounds(new LatLngBounds(southWest,northEast),10));
    }else if(map != null && centerPoint != null){
        CameraPosition position = new CameraPosition.Builder()
         .target(centerPoint).zoom(17).build();
        map.animateCamera(CameraUpdateFactory.newCameraPosition(position));
    }

如果我取消相机移动，它不会崩溃，但不会回到他们移开的点或其他什么地方。

我检查确保map不为null，所以我不知道是什么导致了错误？

- tyczj

1

请查看此答案： https://dev59.com/NWYr5IYBdhLWcg3waJn7#13692908 - Sean Barbeau

正如之前的答案所建议的，我提出了这个。 - unmultimedio

1个回答

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- MaciejGórski · Accepted Answer

Caused by: java.lang.IllegalStateException: Map size should not be 0. Most likely, layout has not yet occured for the map view.

这应该足够清楚了。你不能调用

map.animateCamera(CameraUpdateFactory.newLatLngBounds(new LatLngBounds(southWest,northEast),10));

在布局完成之前，您需要使用3个参数版本。

请参阅此处的文档：newLatLngBounds

或者，您可以监听布局完成后再调用此代码，而不是在onResume中调用。