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我爲我的實時多人遊戲使用Google Play遊戲服務，但我無法從未擴展com.google.example的其他活動廣播實時消息。 games.basegameutils.BaseGameActivity。發送來自其他活動的實時消息
擴展BaseGameActivity的我的活動（MainActivity）獲得了一個靜態實例，我使用了其他使用Andengine的活動（RaceActivity）。起初，我將我的MainActivity實例化，並在所有玩家都準備好後開始RaceActivity。然後，在我的RaceActivity，我把從我的MainActivity該廣播消息的靜態功能，但它給了我這樣的例外：
06-02 14:55:04.585: E/AndroidRuntime(7961): FATAL EXCEPTION: UpdateThread
06-02 14:55:04.585: E/AndroidRuntime(7961): java.lang.IllegalStateException: Failed to send message, real-time match service is not connected.
06-02 14:55:04.585: E/AndroidRuntime(7961): at android.os.Parcel.readException(Parcel.java:1433)
06-02 14:55:04.585: E/AndroidRuntime(7961): at android.os.Parcel.readException(Parcel.java:1379)
06-02 14:55:04.585: E/AndroidRuntime(7961): at com.google.android.gms.internal.bm$a$a.a(Unknown Source)
06-02 14:55:04.585: E/AndroidRuntime(7961): at com.google.android.gms.internal.bj.sendReliableRealTimeMessage(Unknown Source)
06-02 14:55:04.585: E/AndroidRuntime(7961): at com.google.android.gms.games.GamesClient.sendReliableRealTimeMessage(Unknown Source)
06-02 14:55:04.585: E/AndroidRuntime(7961): at com.game.superninjarun.structure.MainActivity.broadcastMessage(MainActivity.java:371)
06-02 14:55:04.585: E/AndroidRuntime(7961): at com.game.superninjarun.structure.GameScene.readyUp(GameScene.java:95)
06-02 14:55:04.585: E/AndroidRuntime(7961): at com.game.superninjarun.structure.GameScene.createScene(GameScene.java:42)
06-02 14:55:04.585: E/AndroidRuntime(7961): at com.game.superninjarun.structure.BaseScene.<init>(BaseScene.java:39)
06-02 14:55:04.585: E/AndroidRuntime(7961): at com.game.superninjarun.structure.GameScene.<init>(GameScene.java:25)
06-02 14:55:04.585: E/AndroidRuntime(7961): at com.game.superninjarun.structure.SceneManager$1.onTimePassed(SceneManager.java:109)
06-02 14:55:04.585: E/AndroidRuntime(7961): at org.andengine.engine.handler.timer.TimerHandler.onUpdate(TimerHandler.java:98)
06-02 14:55:04.585: E/AndroidRuntime(7961): at org.andengine.engine.handler.UpdateHandlerList.onUpdate(UpdateHandlerList.java:47)
06-02 14:55:04.585: E/AndroidRuntime(7961): at org.andengine.engine.Engine.onUpdateUpdateHandlers(Engine.java:597)
06-02 14:55:04.585: E/AndroidRuntime(7961): at org.andengine.engine.Engine.onUpdate(Engine.java:585)
06-02 14:55:04.585: E/AndroidRuntime(7961): at org.andengine.engine.Engine.onTickUpdate(Engine.java:548)
06-02 14:55:04.585: E/AndroidRuntime(7961): at org.andengine.engine.Engine$UpdateThread.run(Engine.java:820)
是否有人知道這到底是實時匹配服務？我甚至無法在Google上找到它...