我目前正在实施我自己的子类的SupportMapFragment,使用谷歌的播放，服务库R3。

I'm currently implementing my own subclass of SupportMapFragment, using the google-play-services library r3.

我收到了 NullPointerException异常在图书馆的内部类之一，当我尝试我的片段添加到活动或 ViewPager 。 以下是有关堆栈跟踪：

I get a NullPointerException in one of the internal classes of the library when I try to add my Fragment to an Activity or ViewPager. Here's the relevant stacktrace:

java.lang.NullPointerException
    at maps.y.p.onResume(Unknown Source)
    at com.google.android.gms.maps.internal.IMapFragmentDelegate$Stub.onTransact(IMapFragmentDelegate.java:115)
    at android.os.Binder.transact(Binder.java:310)
    at com.google.android.gms.maps.internal.IMapFragmentDelegate$a$a.onResume(Unknown Source)
    at com.google.android.gms.maps.SupportMapFragment$a.onResume(Unknown Source)
    at com.google.android.gms.internal.c$1.a(Unknown Source)
    at com.google.android.gms.internal.c.a(Unknown Source)
    at com.google.android.gms.internal.c.onResume(Unknown Source)
    at com.google.android.gms.maps.SupportMapFragment.onResume(Unknown Source)
    at android.support.v4.app.Fragment.performResume(Fragment.java:1503)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947)
    at android.support.v4.app.FragmentManagerImpl.performPendingDeferredStart(FragmentManager.java:807)
    at android.support.v4.app.FragmentManagerImpl.startPendingDeferredFragments(FragmentManager.java:1112)
    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1461)
    at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:461)

显然，内部映射为null，在这一点上。

Apparently the internal map is null at this point.

有没有人已经遇到这个问题，有一个解决方案？

Did anyone already run into this issue and has a solution?

推荐答案

在你SupportMapFragment的子类，并重写onCreateView（...）？

In your subclass of SupportMapFragment, did you override onCreateView(...)?

如果你没有，你还需要调用super.onCreateView（...）在自己的onCreateView（...），让超类来创建其观点。该片段与基本观点紧密联系在一起。

If you did, you'd need to also call super.onCreateView(...) in your own onCreateView(...) to let the super class to create its view. The fragment is tied closely with the underlying view.