在RemotePlaybackClient上调用play（）时Google Play服务中的NullPointerException [英] NullPointerException in Google Play Services When Calling play() on RemotePlaybackClient

问题描述

我的这个示例应用程序曾经工作得很好。

虽然Google在过去几个月更新了Google Play服务（和Chromecast本身），现在当我调用 play（）在 RemotePlaybackClient 的Chromecast上，Google Play服务本身会崩溃：

  E / AndroidRuntime：FATAL EXCEPTION：main 
 com.google.android.gms.cast.media.aq.a（SourceFile：96）处的
 java.lang.NullPointerException 
 .google.android.gms.cast.media.ni（SourceFile：1856）
 at com.google.android.gms.cast.media.u.run（SourceFile：2092）
 at android.os .Handler.handleCallback（Handler.java:730）
 at android.os.Handler.dispatchMessage（Handler.java:92）
 at android.os.Looper.loop（Looper.java:137）$ b.b在android.app.ActivityThread.main（ActivityThread.java:5103）
 at java.lang.reflect.Method.invokeNative（Native Method）$ b $ at java.lang.reflect.Method.invoke（Method.java:525）
 at com.android.internal.os。 ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:737）
 at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:553）
 at dalvik.system.NativeStart.main（Native Method ）
  

请注意， play（）调用本身具有期望的效果，因为Chromecast播放媒体。但有时在使用 onResult（）调用 ItemActionCallback 时，上述Google Play服务崩溃发生。这反过来又会导致与Chromecast的连接崩溃，所以我的 MediaRouteActionProvider 消失了，我必须重新运行我的应用再次连接，尽管Chromecast实际上正在播放媒体，我要求。

我已经测试了两个设备（Nexus 4和Galaxy Nexus），结果相同。

我甚至创建了一个新应用程序，试图仅显示一个图像（而不是像原始样本一样播放电影），并且我得到同样的崩溃。

有没有人看过这个，并找到了一些解决方法/修复/无论什么？

正如评论链中指出的，是由Google Play服务中的一个错误引起的，该错误现在已经修复。非常感谢Ali Naddaf的帮助！

This sample application of mine used to work just fine.

Somewhere in the past few months, though, Google updated Google Play Services (and Chromecast itself), and now when I call play() on RemotePlaybackClient for the Chromecast, Google Play Services itself crashes with:

E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NullPointerException
        at com.google.android.gms.cast.media.aq.a(SourceFile:96)
        at com.google.android.gms.cast.media.n.i(SourceFile:1856)
        at com.google.android.gms.cast.media.u.run(SourceFile:2092)
        at android.os.Handler.handleCallback(Handler.java:730)
        at android.os.Handler.dispatchMessage(Handler.java:92)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:5103)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:525)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
        at dalvik.system.NativeStart.main(Native Method)

Note that the play() call itself has the desired effect, in that the Chromecast plays the media. But sometime after it calls the ItemActionCallback with onResult(), the aforementioned crash in Google PLay Services occurs. That, in turn, causes the connection to the Chromecast to collapse, so my MediaRouteActionProvider vanishes and I have to re-run my app to connect again, despite the Chromecast actually playing the media that I requested.

I have tested this with two devices (Nexus 4 and Galaxy Nexus) with the same results.

I have even created a new app, trying to just show an image (instead of play a movie, as with the original sample), and I get the same crash.

Has anyone seen this and found some workaround/fix/whatever?

解决方案

As noted in the comment chain, this was caused by a bug in Google Play Services, which is now fixed. Many thanks to Ali Naddaf for his assistance!

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