AllJoyn ErrorReplyBusException

Question

我试图调用ProxyBusObject接口上的远程AllJoyn方法，但得到了一个ErrorReplyBusException。我似乎在API指南或参考文档上找不到任何关于这方面的信息。任何帮助都将不胜感激。这是代码和错误日志。提前谢谢。

private void connectToClient(String wellKnownName) {

    mProxyObj = mBus.getProxyBusObject(wellKnownName, OBJECT_PATH, BusAttachment.SESSION_ID_ANY, new Class[]{MyBusInterface.class});

    mMyBusInterface = mProxyObj.getInterface(MyBusInterface.class);
        String test = mMyBusInterface.doSomething();
        if (test == null) {
            Log.i(TAG, "Null");
        } else {
            Log.i(TAG, test);
        }
}

错误日志：

E/AndroidRuntime: FATAL EXCEPTION: main
                                               Process: tesi.groupcast, PID: 16789
                                               java.lang.reflect.UndeclaredThrowableException
                                                   at $Proxy3.doSomething(Unknown Source)
                                                   at tesi.groupcast.MainService.connectToClient(MainService.java:188)
                                                   at tesi.groupcast.MainService.update(MainService.java:219)
                                                   at tesi.groupcast.GroupCastApp.notifyObservers(GroupCastApp.java:104)
                                                   at tesi.groupcast.GroupCastApp.newSeedNode(GroupCastApp.java:115)
                                                   at tesi.groupcast.MainGUI$1.onEditorAction(MainGUI.java:85)
                                                   at android.widget.TextView.onEditorAction(TextView.java:4483)
                                                   at com.android.internal.widget.EditableInputConnection.performEditorAction(EditableInputConnection.java:139)
                                                   at com.android.internal.view.IInputConnectionWrapper.executeMessage(IInputConnectionWrapper.java:304)
                                                   at com.android.internal.view.IInputConnectionWrapper$MyHandler.handleMessage(IInputConnectionWrapper.java:78)
                                                   at android.os.Handler.dispatchMessage(Handler.java:102)
                                                   at android.os.Looper.loop(Looper.java:135)
                                                   at android.app.ActivityThread.main(ActivityThread.java:5294)
                                                   at java.lang.reflect.Method.invoke(Native Method)
                                                   at java.lang.reflect.Method.invoke(Method.java:372)
                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
                                                Caused by: org.alljoyn.bus.ErrorReplyBusException: org.alljoyn.Bus.Blocked
                                                   at org.alljoyn.bus.ProxyBusObject.methodCall(Native Method)
                                                   at org.alljoyn.bus.ProxyBusObject.access$300(ProxyBusObject.java:35)
                                                   at org.alljoyn.bus.ProxyBusObject$Handler.invoke(ProxyBusObject.java:264)
                                                   at java.lang.reflect.Proxy.invoke(Proxy.java:397)
                                                   at $Proxy3.doSomething(Unknown Source) 
                                                   at tesi.groupcast.MainService.connectToClient(MainService.java:188) 
                                                   at tesi.groupcast.MainService.update(MainService.java:219) 
                                                   at tesi.groupcast.GroupCastApp.notifyObservers(GroupCastApp.java:104) 
                                                   at tesi.groupcast.GroupCastApp.newSeedNode(GroupCastApp.java:115) 
                                                   at tesi.groupcast.MainGUI$1.onEditorAction(MainGUI.java:85) 
                                                   at android.widget.TextView.onEditorAction(TextView.java:4483) 
                                                   at com.android.internal.widget.EditableInputConnection.performEditorAction(EditableInputConnection.java:139) 
                                                   at com.android.internal.view.IInputConnectionWrapper.executeMessage(IInputConnectionWrapper.java:304) 
                                                   at com.android.internal.view.IInputConnectionWrapper$MyHandler.handleMessage(IInputConnectionWrapper.java:78) 
                                                   at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                   at android.os.Looper.loop(Looper.java:135) 
                                                   at android.app.ActivityThread.main(ActivityThread.java:5294) 
                                                   at java.lang.reflect.Method.invoke(Native Method) 
                                                   at java.lang.reflect.Method.invoke(Method.java:372) 
                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) 
                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699) 

Answer 1

错误是因为总线不知道它应该创建哪个ProxyObject，因为它没有连接到任何BusObject

这是因为您需要在调用代理对象之前加入会话。调用

status = mBus.joinSession(busName, port, sessionID, sessionOpts, new SessionListener());

并在调用getProxyObject方法和其他方法之前检查加入会话的状态。